./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-min.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_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/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_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/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_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/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 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:42:58,257 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:42:58,382 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:42:58,392 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:42:58,393 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:42:58,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:42:58,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:42:58,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:42:58,444 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:42:58,449 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:42:58,450 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:42:58,450 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:42:58,451 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:42:58,453 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:42:58,453 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:42:58,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:42:58,454 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:42:58,454 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:42:58,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:42:58,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:42:58,455 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:42:58,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:42:58,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:42:58,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:42:58,457 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:42:58,458 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:42:58,458 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:42:58,459 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:42:58,460 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:42:58,460 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:42:58,461 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:42:58,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:58,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:42:58,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:42:58,463 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:42:58,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:42:58,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:42:58,470 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:42:58,471 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:42:58,471 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:42:58,471 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:42:58,472 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:42:58,472 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_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 [2023-11-26 10:42:58,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:42:58,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:42:58,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:42:58,786 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:42:58,787 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:42:58,789 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2023-11-26 10:43:01,951 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:43:02,253 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:43:02,255 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2023-11-26 10:43:02,267 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/data/a75581e6c/4f2d26f08327401c8d6ba663920fd9c4/FLAGd41ee5114 [2023-11-26 10:43:02,286 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/data/a75581e6c/4f2d26f08327401c8d6ba663920fd9c4 [2023-11-26 10:43:02,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:43:02,298 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:43:02,303 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:02,303 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:43:02,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:43:02,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c111a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02, skipping insertion in model container [2023-11-26 10:43:02,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,348 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:43:02,606 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_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2854,2867] [2023-11-26 10:43:02,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:02,643 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:43:02,696 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_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2854,2867] [2023-11-26 10:43:02,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:02,716 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:43:02,718 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:43:02,726 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:43:02,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02 WrapperNode [2023-11-26 10:43:02,727 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:02,728 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:02,728 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:43:02,728 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:43:02,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,787 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 240 [2023-11-26 10:43:02,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:02,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:43:02,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:43:02,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:43:02,803 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,813 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,838 INFO L175 MemorySlicer]: Split 24 memory accesses to 5 slices as follows [2, 16, 2, 2, 2]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 4, 1, 1, 1]. [2023-11-26 10:43:02,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,852 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,858 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,861 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,863 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,869 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:43:02,870 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:43:02,870 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:43:02,870 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:43:02,871 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:02,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:02,907 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:43:02,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:43:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:43:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:43:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:43:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:43:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:43:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:43:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:43:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:43:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:43:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:43:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:43:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:43:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:43:02,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:43:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:43:02,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:43:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 10:43:02,959 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 10:43:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:43:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:43:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:43:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:43:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:43:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:43:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:43:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:43:02,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:43:02,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:43:02,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:43:02,963 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 10:43:03,099 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:43:03,102 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:43:03,713 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:43:04,281 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:43:04,281 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-26 10:43:04,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:04 BoogieIcfgContainer [2023-11-26 10:43:04,282 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:43:04,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:43:04,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:43:04,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:43:04,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:43:02" (1/3) ... [2023-11-26 10:43:04,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7889736e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:04, skipping insertion in model container [2023-11-26 10:43:04,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02" (2/3) ... [2023-11-26 10:43:04,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7889736e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:04, skipping insertion in model container [2023-11-26 10:43:04,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:04" (3/3) ... [2023-11-26 10:43:04,296 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2023-11-26 10:43:04,309 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:43:04,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:43:04,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:43:04,321 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:43:04,401 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:43:04,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 41 transitions, 103 flow [2023-11-26 10:43:04,495 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2023-11-26 10:43:04,496 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:43:04,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 7/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-26 10:43:04,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 41 transitions, 103 flow [2023-11-26 10:43:04,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 92 flow [2023-11-26 10:43:04,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:43:04,530 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;@129eb194, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:43:04,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 10:43:04,560 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:43:04,560 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2023-11-26 10:43:04,560 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:43:04,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:04,561 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] [2023-11-26 10:43:04,562 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 1 more)] === [2023-11-26 10:43:04,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2092303507, now seen corresponding path program 1 times [2023-11-26 10:43:04,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:04,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870986347] [2023-11-26 10:43:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:04,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:05,238 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 10:43:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:05,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870986347] [2023-11-26 10:43:05,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870986347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:05,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:05,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930045026] [2023-11-26 10:43:05,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:05,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:05,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:05,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-26 10:43:05,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 10:43:05,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:05,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-26 10:43:05,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:05,658 INFO L124 PetriNetUnfolderBase]: 406/689 cut-off events. [2023-11-26 10:43:05,659 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-26 10:43:05,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 689 events. 406/689 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2827 event pairs, 265 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 993. Up to 557 conditions per place. [2023-11-26 10:43:05,674 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 29 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-11-26 10:43:05,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 156 flow [2023-11-26 10:43:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-26 10:43:05,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2023-11-26 10:43:05,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-26 10:43:05,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-26 10:43:05,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:05,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-26 10:43:05,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 10:43:05,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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 10:43:05,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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 10:43:05,710 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 92 flow. Second operand 3 states and 62 transitions. [2023-11-26 10:43:05,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 156 flow [2023-11-26 10:43:05,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 10:43:05,721 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 92 flow [2023-11-26 10:43:05,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-26 10:43:05,729 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2023-11-26 10:43:05,730 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 92 flow [2023-11-26 10:43:05,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 10:43:05,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:05,731 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] [2023-11-26 10:43:05,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:43:05,733 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 1 more)] === [2023-11-26 10:43:05,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:05,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2133776376, now seen corresponding path program 1 times [2023-11-26 10:43:05,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:05,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012084987] [2023-11-26 10:43:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:05,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:06,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:06,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012084987] [2023-11-26 10:43:06,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012084987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:06,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:06,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:43:06,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9611081] [2023-11-26 10:43:06,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:06,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:06,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:06,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-26 10:43:06,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 10:43:06,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:06,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-26 10:43:06,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:06,257 INFO L124 PetriNetUnfolderBase]: 406/691 cut-off events. [2023-11-26 10:43:06,257 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-26 10:43:06,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275 conditions, 691 events. 406/691 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2830 event pairs, 265 based on Foata normal form. 0/611 useless extension candidates. Maximal degree in co-relation 1264. Up to 556 conditions per place. [2023-11-26 10:43:06,265 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-26 10:43:06,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 162 flow [2023-11-26 10:43:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:43:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2023-11-26 10:43:06,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2023-11-26 10:43:06,273 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 75 transitions. [2023-11-26 10:43:06,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 75 transitions. [2023-11-26 10:43:06,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:06,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 75 transitions. [2023-11-26 10:43:06,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 10:43:06,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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 10:43:06,286 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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 10:43:06,286 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 92 flow. Second operand 4 states and 75 transitions. [2023-11-26 10:43:06,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 162 flow [2023-11-26 10:43:06,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 158 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:06,291 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 116 flow [2023-11-26 10:43:06,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-11-26 10:43:06,293 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-26 10:43:06,293 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 116 flow [2023-11-26 10:43:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 10:43:06,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:06,294 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] [2023-11-26 10:43:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:43:06,294 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 1 more)] === [2023-11-26 10:43:06,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:06,297 INFO L85 PathProgramCache]: Analyzing trace with hash 571813758, now seen corresponding path program 1 times [2023-11-26 10:43:06,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:06,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994917287] [2023-11-26 10:43:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:06,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:43:06,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:06,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994917287] [2023-11-26 10:43:06,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994917287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:06,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:06,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:43:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505323675] [2023-11-26 10:43:06,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:06,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:06,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:06,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-26 10:43:06,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:43:06,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:06,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-26 10:43:06,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:06,800 INFO L124 PetriNetUnfolderBase]: 584/1064 cut-off events. [2023-11-26 10:43:06,800 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-26 10:43:06,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1870 conditions, 1064 events. 584/1064 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4922 event pairs, 191 based on Foata normal form. 1/937 useless extension candidates. Maximal degree in co-relation 1850. Up to 398 conditions per place. [2023-11-26 10:43:06,811 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 44 selfloop transitions, 2 changer transitions 2/55 dead transitions. [2023-11-26 10:43:06,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 245 flow [2023-11-26 10:43:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-26 10:43:06,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2023-11-26 10:43:06,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-26 10:43:06,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-26 10:43:06,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:06,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-26 10:43:06,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 10:43:06,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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 10:43:06,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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 10:43:06,816 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 116 flow. Second operand 3 states and 76 transitions. [2023-11-26 10:43:06,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 245 flow [2023-11-26 10:43:06,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:06,819 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 127 flow [2023-11-26 10:43:06,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-26 10:43:06,821 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-26 10:43:06,821 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 127 flow [2023-11-26 10:43:06,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:43:06,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:06,822 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] [2023-11-26 10:43:06,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:43:06,822 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 1 more)] === [2023-11-26 10:43:06,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:06,823 INFO L85 PathProgramCache]: Analyzing trace with hash -486309193, now seen corresponding path program 1 times [2023-11-26 10:43:06,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:06,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106445240] [2023-11-26 10:43:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:06,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:43:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:07,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106445240] [2023-11-26 10:43:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106445240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:07,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611361113] [2023-11-26 10:43:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:07,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:07,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:07,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:07,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:43:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:07,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:43:07,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:43:07,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:43:07,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611361113] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:07,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:07,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 10:43:07,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012606902] [2023-11-26 10:43:07,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:07,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:43:07,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:07,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:43:07,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:43:07,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2023-11-26 10:43:07,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 127 flow. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 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 10:43:07,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:07,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2023-11-26 10:43:07,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:08,189 INFO L124 PetriNetUnfolderBase]: 997/1625 cut-off events. [2023-11-26 10:43:08,190 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-26 10:43:08,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3191 conditions, 1625 events. 997/1625 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7161 event pairs, 444 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 2347. Up to 765 conditions per place. [2023-11-26 10:43:08,203 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 40 selfloop transitions, 10 changer transitions 41/97 dead transitions. [2023-11-26 10:43:08,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 462 flow [2023-11-26 10:43:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:43:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 10:43:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2023-11-26 10:43:08,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2023-11-26 10:43:08,210 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 172 transitions. [2023-11-26 10:43:08,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 172 transitions. [2023-11-26 10:43:08,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:08,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 172 transitions. [2023-11-26 10:43:08,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 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 10:43:08,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 10:43:08,220 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 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 10:43:08,221 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 127 flow. Second operand 9 states and 172 transitions. [2023-11-26 10:43:08,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 462 flow [2023-11-26 10:43:08,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:08,229 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 177 flow [2023-11-26 10:43:08,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-11-26 10:43:08,231 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2023-11-26 10:43:08,231 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 177 flow [2023-11-26 10:43:08,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 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 10:43:08,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:08,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 10:43:08,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:08,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:08,440 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 1 more)] === [2023-11-26 10:43:08,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash -363157052, now seen corresponding path program 2 times [2023-11-26 10:43:08,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:08,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730545190] [2023-11-26 10:43:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:08,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:43:08,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:08,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730545190] [2023-11-26 10:43:08,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730545190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:08,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624233720] [2023-11-26 10:43:08,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:08,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:08,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:08,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:08,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:43:08,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:43:08,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:08,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:43:08,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:43:09,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 10:43:09,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624233720] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:09,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:09,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-26 10:43:09,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880517858] [2023-11-26 10:43:09,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:09,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:09,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:09,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:43:09,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-26 10:43:09,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 10:43:09,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:09,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-26 10:43:09,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:09,406 INFO L124 PetriNetUnfolderBase]: 728/1293 cut-off events. [2023-11-26 10:43:09,407 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-11-26 10:43:09,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1293 events. 728/1293 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6277 event pairs, 299 based on Foata normal form. 0/1156 useless extension candidates. Maximal degree in co-relation 2569. Up to 771 conditions per place. [2023-11-26 10:43:09,421 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-11-26 10:43:09,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 321 flow [2023-11-26 10:43:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:43:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2023-11-26 10:43:09,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2023-11-26 10:43:09,423 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 107 transitions. [2023-11-26 10:43:09,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 107 transitions. [2023-11-26 10:43:09,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:09,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 107 transitions. [2023-11-26 10:43:09,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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 10:43:09,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 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 10:43:09,427 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 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 10:43:09,427 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 177 flow. Second operand 6 states and 107 transitions. [2023-11-26 10:43:09,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 321 flow [2023-11-26 10:43:09,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 301 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-26 10:43:09,436 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 177 flow [2023-11-26 10:43:09,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-26 10:43:09,439 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2023-11-26 10:43:09,439 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 177 flow [2023-11-26 10:43:09,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 10:43:09,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:09,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 10:43:09,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:09,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:09,649 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 1 more)] === [2023-11-26 10:43:09,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1231162789, now seen corresponding path program 1 times [2023-11-26 10:43:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:09,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692410768] [2023-11-26 10:43:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:09,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:43:09,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:09,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692410768] [2023-11-26 10:43:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692410768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:09,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658430735] [2023-11-26 10:43:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:09,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:09,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:09,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:09,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:43:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:10,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:43:10,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:43:10,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:43:10,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658430735] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:10,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:10,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-26 10:43:10,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787755128] [2023-11-26 10:43:10,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:10,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:10,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:10,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:10,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:43:10,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2023-11-26 10:43:10,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 10:43:10,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:10,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2023-11-26 10:43:10,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:10,559 INFO L124 PetriNetUnfolderBase]: 1060/1806 cut-off events. [2023-11-26 10:43:10,559 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2023-11-26 10:43:10,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3980 conditions, 1806 events. 1060/1806 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8800 event pairs, 355 based on Foata normal form. 0/1541 useless extension candidates. Maximal degree in co-relation 3946. Up to 752 conditions per place. [2023-11-26 10:43:10,576 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 48 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2023-11-26 10:43:10,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 333 flow [2023-11-26 10:43:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:43:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2023-11-26 10:43:10,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2023-11-26 10:43:10,578 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 101 transitions. [2023-11-26 10:43:10,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 101 transitions. [2023-11-26 10:43:10,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:10,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 101 transitions. [2023-11-26 10:43:10,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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 10:43:10,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 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 10:43:10,580 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 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 10:43:10,580 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 177 flow. Second operand 6 states and 101 transitions. [2023-11-26 10:43:10,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 333 flow [2023-11-26 10:43:10,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 319 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-26 10:43:10,589 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 192 flow [2023-11-26 10:43:10,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-26 10:43:10,592 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2023-11-26 10:43:10,592 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 192 flow [2023-11-26 10:43:10,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 10:43:10,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:10,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 10:43:10,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:10,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:10,809 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 1 more)] === [2023-11-26 10:43:10,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:10,809 INFO L85 PathProgramCache]: Analyzing trace with hash -926828371, now seen corresponding path program 1 times [2023-11-26 10:43:10,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:10,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894010263] [2023-11-26 10:43:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:10,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:43:11,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:11,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894010263] [2023-11-26 10:43:11,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894010263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:11,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:11,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:43:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413810463] [2023-11-26 10:43:11,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:11,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:11,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:11,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:11,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2023-11-26 10:43:11,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 10:43:11,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:11,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2023-11-26 10:43:11,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:11,680 INFO L124 PetriNetUnfolderBase]: 1234/1922 cut-off events. [2023-11-26 10:43:11,680 INFO L125 PetriNetUnfolderBase]: For 831/831 co-relation queries the response was YES. [2023-11-26 10:43:11,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4708 conditions, 1922 events. 1234/1922 cut-off events. For 831/831 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7808 event pairs, 261 based on Foata normal form. 52/1869 useless extension candidates. Maximal degree in co-relation 4672. Up to 1356 conditions per place. [2023-11-26 10:43:11,698 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 77 selfloop transitions, 8 changer transitions 1/91 dead transitions. [2023-11-26 10:43:11,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 500 flow [2023-11-26 10:43:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:43:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2023-11-26 10:43:11,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2023-11-26 10:43:11,700 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 118 transitions. [2023-11-26 10:43:11,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 118 transitions. [2023-11-26 10:43:11,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:11,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 118 transitions. [2023-11-26 10:43:11,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 10:43:11,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 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 10:43:11,702 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 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 10:43:11,702 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 192 flow. Second operand 6 states and 118 transitions. [2023-11-26 10:43:11,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 500 flow [2023-11-26 10:43:11,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 489 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:43:11,711 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 242 flow [2023-11-26 10:43:11,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-11-26 10:43:11,712 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2023-11-26 10:43:11,712 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 242 flow [2023-11-26 10:43:11,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 10:43:11,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:11,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 10:43:11,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:43:11,713 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 1 more)] === [2023-11-26 10:43:11,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1822430167, now seen corresponding path program 2 times [2023-11-26 10:43:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:11,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341119504] [2023-11-26 10:43:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:11,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:43:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341119504] [2023-11-26 10:43:14,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341119504] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521178745] [2023-11-26 10:43:14,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:14,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:14,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:14,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea25b1d-d95b-4140-a3dd-ed925a1ae90c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:43:14,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:43:14,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:14,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:43:14,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:15,867 INFO L349 Elim1Store]: treesize reduction 92, result has 46.8 percent of original size [2023-11-26 10:43:15,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 131