./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.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_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya --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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:41:01,728 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:41:01,801 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:41:01,806 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:41:01,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:41:01,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:41:01,838 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:41:01,838 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:41:01,839 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:41:01,840 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:41:01,840 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:41:01,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:41:01,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:41:01,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:41:01,843 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:41:01,844 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:41:01,844 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:41:01,845 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:41:01,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:41:01,846 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:41:01,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:41:01,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:41:01,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:41:01,848 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:41:01,849 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:41:01,849 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:41:01,850 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:41:01,851 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:41:01,851 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:41:01,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:41:01,852 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:41:01,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:41:01,853 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:41:01,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:41:01,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:41:01,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:41:01,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:41:01,854 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:41:01,855 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:41:01,855 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:41:01,855 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:41:01,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:41:01,856 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_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2023-11-28 20:41:02,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:41:02,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:41:02,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:41:02,162 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:41:02,163 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:41:02,164 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-28 20:41:05,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:41:05,352 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:41:05,353 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-28 20:41:05,362 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/data/073717a93/8fff0743834d40bcbdec4c7dad1e33d2/FLAG440fcc7e6 [2023-11-28 20:41:05,379 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/data/073717a93/8fff0743834d40bcbdec4c7dad1e33d2 [2023-11-28 20:41:05,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:41:05,383 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:41:05,385 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:41:05,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:41:05,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:41:05,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,393 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@120f3fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05, skipping insertion in model container [2023-11-28 20:41:05,393 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,423 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:41:05,648 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_76c4379f-1cca-491e-ae5d-5657e9490b79/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2023-11-28 20:41:05,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:41:05,674 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:41:05,704 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_76c4379f-1cca-491e-ae5d-5657e9490b79/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2023-11-28 20:41:05,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:41:05,720 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:41:05,720 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:41:05,730 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:41:05,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05 WrapperNode [2023-11-28 20:41:05,731 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:41:05,732 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:41:05,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:41:05,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:41:05,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,752 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,781 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-11-28 20:41:05,782 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:41:05,783 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:41:05,783 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:41:05,783 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:41:05,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,802 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,822 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 2, 7]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-28 20:41:05,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,823 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,832 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,840 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,842 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:41:05,847 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:41:05,847 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:41:05,847 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:41:05,848 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (1/1) ... [2023-11-28 20:41:05,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:41:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:05,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:41:05,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:41:05,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:41:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 20:41:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 20:41:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 20:41:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 20:41:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-28 20:41:05,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-28 20:41:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:41:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:41:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:41:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:41:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:41:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:41:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:41:05,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:41:05,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:41:05,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:41:05,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 20:41:05,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-28 20:41:05,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-28 20:41:05,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:41:05,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:41:05,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:41:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:41:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:41:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:41:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:41:05,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 20:41:05,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:41:05,949 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:41:06,086 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:41:06,088 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:41:06,395 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:41:06,700 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:41:06,700 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-28 20:41:06,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:41:06 BoogieIcfgContainer [2023-11-28 20:41:06,701 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:41:06,704 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:41:06,704 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:41:06,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:41:06,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:41:05" (1/3) ... [2023-11-28 20:41:06,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4b6cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:41:06, skipping insertion in model container [2023-11-28 20:41:06,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:05" (2/3) ... [2023-11-28 20:41:06,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4b6cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:41:06, skipping insertion in model container [2023-11-28 20:41:06,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:41:06" (3/3) ... [2023-11-28 20:41:06,712 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2023-11-28 20:41:06,723 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 20:41:06,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:41:06,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:41:06,737 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:41:06,795 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-28 20:41:06,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2023-11-28 20:41:06,865 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-11-28 20:41:06,866 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-28 20:41:06,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-28 20:41:06,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2023-11-28 20:41:06,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2023-11-28 20:41:06,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:41:06,895 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;@376e10b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:41:06,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-28 20:41:06,912 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:41:06,912 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-28 20:41:06,912 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-28 20:41:06,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:06,913 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] [2023-11-28 20:41:06,914 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)] === [2023-11-28 20:41:06,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:06,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1064244367, now seen corresponding path program 1 times [2023-11-28 20:41:06,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:06,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235014555] [2023-11-28 20:41:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:06,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:07,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:07,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235014555] [2023-11-28 20:41:07,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235014555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:41:07,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:41:07,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:41:07,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674580973] [2023-11-28 20:41:07,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:07,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:41:07,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:07,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:41:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:41:07,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-28 20:41:07,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-28 20:41:07,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:07,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-28 20:41:07,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:07,824 INFO L124 PetriNetUnfolderBase]: 674/1036 cut-off events. [2023-11-28 20:41:07,824 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-28 20:41:07,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 1036 events. 674/1036 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4101 event pairs, 140 based on Foata normal form. 1/1023 useless extension candidates. Maximal degree in co-relation 1708. Up to 740 conditions per place. [2023-11-28 20:41:07,838 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2023-11-28 20:41:07,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 225 flow [2023-11-28 20:41:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:41:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:41:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-28 20:41:07,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2023-11-28 20:41:07,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-28 20:41:07,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-28 20:41:07,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:07,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-28 20:41:07,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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) [2023-11-28 20:41:07,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-28 20:41:07,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-28 20:41:07,864 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states and 68 transitions. [2023-11-28 20:41:07,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 225 flow [2023-11-28 20:41:07,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 203 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-28 20:41:07,873 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 94 flow [2023-11-28 20:41:07,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-11-28 20:41:07,879 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-28 20:41:07,879 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 94 flow [2023-11-28 20:41:07,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-28 20:41:07,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:07,880 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] [2023-11-28 20:41:07,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:41:07,881 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)] === [2023-11-28 20:41:07,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash 937462874, now seen corresponding path program 1 times [2023-11-28 20:41:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:07,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101538761] [2023-11-28 20:41:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:07,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:41:08,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:08,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101538761] [2023-11-28 20:41:08,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101538761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:41:08,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:41:08,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:41:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131737417] [2023-11-28 20:41:08,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:08,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:41:08,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:41:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:41:08,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-28 20:41:08,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-11-28 20:41:08,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:08,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-28 20:41:08,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:08,230 INFO L124 PetriNetUnfolderBase]: 674/1032 cut-off events. [2023-11-28 20:41:08,230 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-11-28 20:41:08,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1032 events. 674/1032 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4207 event pairs, 447 based on Foata normal form. 0/1002 useless extension candidates. Maximal degree in co-relation 875. Up to 984 conditions per place. [2023-11-28 20:41:08,241 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-11-28 20:41:08,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 158 flow [2023-11-28 20:41:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:41:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:41:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-28 20:41:08,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-28 20:41:08,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-28 20:41:08,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-28 20:41:08,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:08,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-28 20:41:08,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-11-28 20:41:08,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-28 20:41:08,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2023-11-28 20:41:08,247 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 94 flow. Second operand 3 states and 50 transitions. [2023-11-28 20:41:08,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 158 flow [2023-11-28 20:41:08,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:41:08,250 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 102 flow [2023-11-28 20:41:08,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-28 20:41:08,252 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-11-28 20:41:08,252 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 102 flow [2023-11-28 20:41:08,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-11-28 20:41:08,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:08,253 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] [2023-11-28 20:41:08,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:41:08,253 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)] === [2023-11-28 20:41:08,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash 200410163, now seen corresponding path program 1 times [2023-11-28 20:41:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:08,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633349224] [2023-11-28 20:41:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:41:08,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:08,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633349224] [2023-11-28 20:41:08,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633349224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:41:08,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:41:08,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:41:08,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82061901] [2023-11-28 20:41:08,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:08,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:41:08,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:08,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:41:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:41:08,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-28 20:41:08,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-11-28 20:41:08,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:08,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-28 20:41:08,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:08,618 INFO L124 PetriNetUnfolderBase]: 865/1276 cut-off events. [2023-11-28 20:41:08,618 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-11-28 20:41:08,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1276 events. 865/1276 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5130 event pairs, 265 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 2812. Up to 649 conditions per place. [2023-11-28 20:41:08,629 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-28 20:41:08,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 240 flow [2023-11-28 20:41:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:41:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:41:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2023-11-28 20:41:08,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-28 20:41:08,633 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 67 transitions. [2023-11-28 20:41:08,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 67 transitions. [2023-11-28 20:41:08,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:08,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 67 transitions. [2023-11-28 20:41:08,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2023-11-28 20:41:08,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:08,636 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:08,636 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 102 flow. Second operand 4 states and 67 transitions. [2023-11-28 20:41:08,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 240 flow [2023-11-28 20:41:08,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 234 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-28 20:41:08,639 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 117 flow [2023-11-28 20:41:08,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-11-28 20:41:08,641 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-28 20:41:08,641 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 117 flow [2023-11-28 20:41:08,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-11-28 20:41:08,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:08,642 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] [2023-11-28 20:41:08,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:41:08,642 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)] === [2023-11-28 20:41:08,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:08,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1953148681, now seen corresponding path program 1 times [2023-11-28 20:41:08,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:08,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42212048] [2023-11-28 20:41:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:08,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:41:08,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:08,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42212048] [2023-11-28 20:41:08,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42212048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:08,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696118058] [2023-11-28 20:41:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:08,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:08,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:08,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:08,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:41:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:08,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:41:08,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:41:09,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:41:09,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696118058] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:09,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:41:09,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-28 20:41:09,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013677915] [2023-11-28 20:41:09,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:09,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:41:09,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:41:09,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:41:09,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-28 20:41:09,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-11-28 20:41:09,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:09,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-28 20:41:09,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:09,412 INFO L124 PetriNetUnfolderBase]: 898/1343 cut-off events. [2023-11-28 20:41:09,412 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2023-11-28 20:41:09,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3365 conditions, 1343 events. 898/1343 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5622 event pairs, 253 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 3345. Up to 668 conditions per place. [2023-11-28 20:41:09,428 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 43 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-28 20:41:09,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 265 flow [2023-11-28 20:41:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:41:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:41:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2023-11-28 20:41:09,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2023-11-28 20:41:09,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 74 transitions. [2023-11-28 20:41:09,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 74 transitions. [2023-11-28 20:41:09,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:09,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 74 transitions. [2023-11-28 20:41:09,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-28 20:41:09,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-28 20:41:09,434 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 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) [2023-11-28 20:41:09,434 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 117 flow. Second operand 5 states and 74 transitions. [2023-11-28 20:41:09,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 265 flow [2023-11-28 20:41:09,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:41:09,439 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 136 flow [2023-11-28 20:41:09,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-11-28 20:41:09,441 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-11-28 20:41:09,441 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 136 flow [2023-11-28 20:41:09,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-11-28 20:41:09,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:09,442 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] [2023-11-28 20:41:09,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:41:09,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:09,649 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)] === [2023-11-28 20:41:09,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash -239191844, now seen corresponding path program 1 times [2023-11-28 20:41:09,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:09,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068301534] [2023-11-28 20:41:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:09,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:10,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:10,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068301534] [2023-11-28 20:41:10,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068301534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:10,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368734209] [2023-11-28 20:41:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:10,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:10,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:10,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:10,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:41:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:10,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:41:11,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:11,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:41:11,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2023-11-28 20:41:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:11,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:14,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 208 [2023-11-28 20:41:14,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:41:14,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2023-11-28 20:41:46,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 264 [2023-11-28 20:41:46,550 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-11-28 20:41:46,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 1 [2023-11-28 20:41:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:46,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368734209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:46,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:46,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2023-11-28 20:41:46,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358883972] [2023-11-28 20:41:46,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:46,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 20:41:46,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 20:41:46,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:41:46,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-28 20:41:46,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 136 flow. Second operand has 24 states, 24 states have (on average 9.208333333333334) internal successors, (221), 24 states have internal predecessors, (221), 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) [2023-11-28 20:41:46,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:41:46,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-28 20:41:46,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:41:50,472 INFO L124 PetriNetUnfolderBase]: 1993/3005 cut-off events. [2023-11-28 20:41:50,472 INFO L125 PetriNetUnfolderBase]: For 1852/1852 co-relation queries the response was YES. [2023-11-28 20:41:50,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8274 conditions, 3005 events. 1993/3005 cut-off events. For 1852/1852 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13906 event pairs, 114 based on Foata normal form. 1/3005 useless extension candidates. Maximal degree in co-relation 6106. Up to 1481 conditions per place. [2023-11-28 20:41:50,497 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 151 selfloop transitions, 57 changer transitions 1/213 dead transitions. [2023-11-28 20:41:50,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 213 transitions, 1123 flow [2023-11-28 20:41:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 20:41:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-28 20:41:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 335 transitions. [2023-11-28 20:41:50,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2023-11-28 20:41:50,502 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 335 transitions. [2023-11-28 20:41:50,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 335 transitions. [2023-11-28 20:41:50,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:41:50,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 335 transitions. [2023-11-28 20:41:50,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 15.952380952380953) internal successors, (335), 21 states have internal predecessors, (335), 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) [2023-11-28 20:41:50,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 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) [2023-11-28 20:41:50,509 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 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) [2023-11-28 20:41:50,510 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 136 flow. Second operand 21 states and 335 transitions. [2023-11-28 20:41:50,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 213 transitions, 1123 flow [2023-11-28 20:41:50,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 213 transitions, 1106 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:41:50,520 INFO L231 Difference]: Finished difference. Result has 66 places, 93 transitions, 547 flow [2023-11-28 20:41:50,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=547, PETRI_PLACES=66, PETRI_TRANSITIONS=93} [2023-11-28 20:41:50,521 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2023-11-28 20:41:50,522 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 93 transitions, 547 flow [2023-11-28 20:41:50,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.208333333333334) internal successors, (221), 24 states have internal predecessors, (221), 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) [2023-11-28 20:41:50,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:41:50,523 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] [2023-11-28 20:41:50,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:41:50,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:50,724 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)] === [2023-11-28 20:41:50,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1087062616, now seen corresponding path program 2 times [2023-11-28 20:41:50,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:50,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771320482] [2023-11-28 20:41:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:50,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:51,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:51,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771320482] [2023-11-28 20:41:51,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771320482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:51,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482526036] [2023-11-28 20:41:51,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:41:51,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:51,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:51,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:51,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:41:51,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:41:51,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:41:51,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:41:51,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:51,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:41:52,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2023-11-28 20:41:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:52,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:54,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 208 [2023-11-28 20:41:54,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:41:54,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2023-11-28 20:42:33,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 264 [2023-11-28 20:42:33,453 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-11-28 20:42:33,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 1 [2023-11-28 20:42:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:33,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482526036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:33,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:33,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-28 20:42:33,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358420818] [2023-11-28 20:42:33,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:33,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:42:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:33,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:42:33,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:42:33,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-28 20:42:33,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 93 transitions, 547 flow. Second operand has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 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) [2023-11-28 20:42:33,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:33,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-28 20:42:33,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:35,157 INFO L124 PetriNetUnfolderBase]: 1667/2662 cut-off events. [2023-11-28 20:42:35,157 INFO L125 PetriNetUnfolderBase]: For 3501/3506 co-relation queries the response was YES. [2023-11-28 20:42:35,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 2662 events. 1667/2662 cut-off events. For 3501/3506 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13335 event pairs, 128 based on Foata normal form. 5/2666 useless extension candidates. Maximal degree in co-relation 7992. Up to 1778 conditions per place. [2023-11-28 20:42:35,183 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 135 selfloop transitions, 49 changer transitions 1/191 dead transitions. [2023-11-28 20:42:35,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 191 transitions, 1251 flow [2023-11-28 20:42:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:42:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-28 20:42:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 252 transitions. [2023-11-28 20:42:35,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-28 20:42:35,186 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 252 transitions. [2023-11-28 20:42:35,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 252 transitions. [2023-11-28 20:42:35,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:35,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 252 transitions. [2023-11-28 20:42:35,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 16.8) internal successors, (252), 15 states have internal predecessors, (252), 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) [2023-11-28 20:42:35,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 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) [2023-11-28 20:42:35,191 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 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) [2023-11-28 20:42:35,191 INFO L175 Difference]: Start difference. First operand has 66 places, 93 transitions, 547 flow. Second operand 15 states and 252 transitions. [2023-11-28 20:42:35,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 191 transitions, 1251 flow [2023-11-28 20:42:35,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 191 transitions, 1133 flow, removed 44 selfloop flow, removed 3 redundant places. [2023-11-28 20:42:35,207 INFO L231 Difference]: Finished difference. Result has 78 places, 113 transitions, 683 flow [2023-11-28 20:42:35,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=683, PETRI_PLACES=78, PETRI_TRANSITIONS=113} [2023-11-28 20:42:35,208 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2023-11-28 20:42:35,208 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 113 transitions, 683 flow [2023-11-28 20:42:35,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 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) [2023-11-28 20:42:35,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:35,209 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] [2023-11-28 20:42:35,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:42:35,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:35,413 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)] === [2023-11-28 20:42:35,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash 134686286, now seen corresponding path program 3 times [2023-11-28 20:42:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:35,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579744091] [2023-11-28 20:42:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:36,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:36,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579744091] [2023-11-28 20:42:36,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579744091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:36,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304230313] [2023-11-28 20:42:36,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:42:36,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:36,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:36,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:36,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:42:36,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:42:36,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:36,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:42:36,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:36,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:42:36,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2023-11-28 20:42:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:37,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:39,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 92 [2023-11-28 20:42:39,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 111 [2023-11-28 20:42:39,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 98 [2023-11-28 20:42:39,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 127 [2023-11-28 20:42:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:39,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304230313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:39,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:39,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2023-11-28 20:42:39,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250969713] [2023-11-28 20:42:39,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:39,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 20:42:39,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:39,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 20:42:39,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:42:40,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-28 20:42:40,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 113 transitions, 683 flow. Second operand has 28 states, 28 states have (on average 7.785714285714286) internal successors, (218), 28 states have internal predecessors, (218), 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) [2023-11-28 20:42:40,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:40,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-28 20:42:40,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:43,767 INFO L124 PetriNetUnfolderBase]: 4895/7293 cut-off events. [2023-11-28 20:42:43,767 INFO L125 PetriNetUnfolderBase]: For 8859/8859 co-relation queries the response was YES. [2023-11-28 20:42:43,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23208 conditions, 7293 events. 4895/7293 cut-off events. For 8859/8859 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 39294 event pairs, 305 based on Foata normal form. 2/6865 useless extension candidates. Maximal degree in co-relation 20984. Up to 3621 conditions per place. [2023-11-28 20:42:43,824 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 257 selfloop transitions, 171 changer transitions 1/432 dead transitions. [2023-11-28 20:42:43,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 432 transitions, 2951 flow [2023-11-28 20:42:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-28 20:42:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-28 20:42:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 451 transitions. [2023-11-28 20:42:43,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41566820276497696 [2023-11-28 20:42:43,828 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 451 transitions. [2023-11-28 20:42:43,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 451 transitions. [2023-11-28 20:42:43,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:43,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 451 transitions. [2023-11-28 20:42:43,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 14.548387096774194) internal successors, (451), 31 states have internal predecessors, (451), 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) [2023-11-28 20:42:43,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 35.0) internal successors, (1120), 32 states have internal predecessors, (1120), 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) [2023-11-28 20:42:43,834 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 35.0) internal successors, (1120), 32 states have internal predecessors, (1120), 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) [2023-11-28 20:42:43,834 INFO L175 Difference]: Start difference. First operand has 78 places, 113 transitions, 683 flow. Second operand 31 states and 451 transitions. [2023-11-28 20:42:43,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 432 transitions, 2951 flow [2023-11-28 20:42:43,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 432 transitions, 2896 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-28 20:42:43,859 INFO L231 Difference]: Finished difference. Result has 125 places, 243 transitions, 2071 flow [2023-11-28 20:42:43,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2071, PETRI_PLACES=125, PETRI_TRANSITIONS=243} [2023-11-28 20:42:43,860 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 88 predicate places. [2023-11-28 20:42:43,860 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 243 transitions, 2071 flow [2023-11-28 20:42:43,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.785714285714286) internal successors, (218), 28 states have internal predecessors, (218), 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) [2023-11-28 20:42:43,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:43,861 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] [2023-11-28 20:42:43,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:42:44,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:44,061 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)] === [2023-11-28 20:42:44,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:44,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1569336808, now seen corresponding path program 4 times [2023-11-28 20:42:44,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:44,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891567601] [2023-11-28 20:42:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:44,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:44,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:44,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891567601] [2023-11-28 20:42:44,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891567601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:44,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764197160] [2023-11-28 20:42:44,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:42:44,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:44,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:44,679 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:44,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:42:44,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:42:44,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:44,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:42:44,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:44,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:42:45,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2023-11-28 20:42:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:45,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:47,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 92 [2023-11-28 20:42:47,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 111 [2023-11-28 20:42:47,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 98 [2023-11-28 20:42:47,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 127 [2023-11-28 20:42:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:47,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764197160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:47,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:47,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2023-11-28 20:42:47,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252463819] [2023-11-28 20:42:47,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:47,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-28 20:42:47,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:47,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-28 20:42:47,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2023-11-28 20:42:48,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-28 20:42:48,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 243 transitions, 2071 flow. Second operand has 27 states, 27 states have (on average 7.851851851851852) internal successors, (212), 27 states have internal predecessors, (212), 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) [2023-11-28 20:42:48,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:42:48,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-28 20:42:48,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:42:52,956 INFO L124 PetriNetUnfolderBase]: 5852/8795 cut-off events. [2023-11-28 20:42:52,956 INFO L125 PetriNetUnfolderBase]: For 39089/39089 co-relation queries the response was YES. [2023-11-28 20:42:52,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38719 conditions, 8795 events. 5852/8795 cut-off events. For 39089/39089 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 49800 event pairs, 459 based on Foata normal form. 2/8797 useless extension candidates. Maximal degree in co-relation 37338. Up to 2853 conditions per place. [2023-11-28 20:42:53,025 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 245 selfloop transitions, 275 changer transitions 1/524 dead transitions. [2023-11-28 20:42:53,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 524 transitions, 4834 flow [2023-11-28 20:42:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-28 20:42:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-28 20:42:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 495 transitions. [2023-11-28 20:42:53,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40408163265306124 [2023-11-28 20:42:53,029 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 495 transitions. [2023-11-28 20:42:53,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 495 transitions. [2023-11-28 20:42:53,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:42:53,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 495 transitions. [2023-11-28 20:42:53,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 14.142857142857142) internal successors, (495), 35 states have internal predecessors, (495), 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) [2023-11-28 20:42:53,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 35.0) internal successors, (1260), 36 states have internal predecessors, (1260), 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) [2023-11-28 20:42:53,034 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 35.0) internal successors, (1260), 36 states have internal predecessors, (1260), 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) [2023-11-28 20:42:53,034 INFO L175 Difference]: Start difference. First operand has 125 places, 243 transitions, 2071 flow. Second operand 35 states and 495 transitions. [2023-11-28 20:42:53,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 524 transitions, 4834 flow [2023-11-28 20:42:53,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 524 transitions, 4762 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-11-28 20:42:53,188 INFO L231 Difference]: Finished difference. Result has 165 places, 332 transitions, 3755 flow [2023-11-28 20:42:53,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3755, PETRI_PLACES=165, PETRI_TRANSITIONS=332} [2023-11-28 20:42:53,190 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 128 predicate places. [2023-11-28 20:42:53,190 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 332 transitions, 3755 flow [2023-11-28 20:42:53,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.851851851851852) internal successors, (212), 27 states have internal predecessors, (212), 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) [2023-11-28 20:42:53,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:42:53,191 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] [2023-11-28 20:42:53,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:42:53,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-28 20:42:53,394 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:42:53,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash -517498202, now seen corresponding path program 5 times [2023-11-28 20:42:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:53,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801797651] [2023-11-28 20:42:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:53,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:54,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:54,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801797651] [2023-11-28 20:42:54,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801797651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:54,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014401134] [2023-11-28 20:42:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:42:54,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:54,133 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:54,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:42:54,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:42:54,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:54,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:42:54,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:54,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:42:54,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2023-11-28 20:42:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:54,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:58,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 195 [2023-11-28 20:42:58,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:42:58,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 278 [2023-11-28 20:43:04,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 167 [2023-11-28 20:43:04,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:43:04,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 219 [2023-11-28 20:43:08,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2023-11-28 20:43:08,370 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-28 20:43:08,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 115 [2023-11-28 20:43:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:09,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014401134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:09,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:09,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-11-28 20:43:09,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122745729] [2023-11-28 20:43:09,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:09,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 20:43:09,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:09,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 20:43:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:43:09,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-28 20:43:09,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 332 transitions, 3755 flow. Second operand has 24 states, 24 states have (on average 8.916666666666666) internal successors, (214), 24 states have internal predecessors, (214), 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) [2023-11-28 20:43:09,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:09,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-28 20:43:09,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:15,170 INFO L124 PetriNetUnfolderBase]: 5320/8047 cut-off events. [2023-11-28 20:43:15,170 INFO L125 PetriNetUnfolderBase]: For 58264/59034 co-relation queries the response was YES. [2023-11-28 20:43:15,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41500 conditions, 8047 events. 5320/8047 cut-off events. For 58264/59034 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45690 event pairs, 334 based on Foata normal form. 184/8136 useless extension candidates. Maximal degree in co-relation 39115. Up to 3869 conditions per place. [2023-11-28 20:43:15,243 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 248 selfloop transitions, 235 changer transitions 2/491 dead transitions. [2023-11-28 20:43:15,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 491 transitions, 5846 flow [2023-11-28 20:43:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 20:43:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-28 20:43:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 364 transitions. [2023-11-28 20:43:15,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45217391304347826 [2023-11-28 20:43:15,247 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 364 transitions. [2023-11-28 20:43:15,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 364 transitions. [2023-11-28 20:43:15,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:15,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 364 transitions. [2023-11-28 20:43:15,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 15.826086956521738) internal successors, (364), 23 states have internal predecessors, (364), 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) [2023-11-28 20:43:15,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 35.0) internal successors, (840), 24 states have internal predecessors, (840), 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) [2023-11-28 20:43:15,252 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 35.0) internal successors, (840), 24 states have internal predecessors, (840), 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) [2023-11-28 20:43:15,253 INFO L175 Difference]: Start difference. First operand has 165 places, 332 transitions, 3755 flow. Second operand 23 states and 364 transitions. [2023-11-28 20:43:15,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 491 transitions, 5846 flow [2023-11-28 20:43:15,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 491 transitions, 5636 flow, removed 59 selfloop flow, removed 16 redundant places. [2023-11-28 20:43:15,646 INFO L231 Difference]: Finished difference. Result has 174 places, 370 transitions, 4583 flow [2023-11-28 20:43:15,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4583, PETRI_PLACES=174, PETRI_TRANSITIONS=370} [2023-11-28 20:43:15,647 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 137 predicate places. [2023-11-28 20:43:15,647 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 370 transitions, 4583 flow [2023-11-28 20:43:15,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.916666666666666) internal successors, (214), 24 states have internal predecessors, (214), 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) [2023-11-28 20:43:15,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:15,648 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-11-28 20:43:15,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:43:15,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:15,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:43:15,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash 99091525, now seen corresponding path program 6 times [2023-11-28 20:43:15,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:15,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185421571] [2023-11-28 20:43:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185421571] [2023-11-28 20:43:15,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185421571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069747364] [2023-11-28 20:43:15,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:43:15,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:15,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:15,986 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:15,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:43:16,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:43:16,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:16,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:43:16,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:16,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069747364] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:16,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:16,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-28 20:43:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614371420] [2023-11-28 20:43:16,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:43:16,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:16,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:43:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:43:16,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-28 20:43:16,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 370 transitions, 4583 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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) [2023-11-28 20:43:16,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:16,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-28 20:43:16,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:18,314 INFO L124 PetriNetUnfolderBase]: 6742/10201 cut-off events. [2023-11-28 20:43:18,315 INFO L125 PetriNetUnfolderBase]: For 83861/84744 co-relation queries the response was YES. [2023-11-28 20:43:18,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54837 conditions, 10201 events. 6742/10201 cut-off events. For 83861/84744 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 61275 event pairs, 1409 based on Foata normal form. 329/10426 useless extension candidates. Maximal degree in co-relation 52692. Up to 3702 conditions per place. [2023-11-28 20:43:18,423 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 507 selfloop transitions, 63 changer transitions 0/577 dead transitions. [2023-11-28 20:43:18,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 577 transitions, 7903 flow [2023-11-28 20:43:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:43:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 20:43:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2023-11-28 20:43:18,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-28 20:43:18,425 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 175 transitions. [2023-11-28 20:43:18,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 175 transitions. [2023-11-28 20:43:18,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:18,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 175 transitions. [2023-11-28 20:43:18,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.5) internal successors, (175), 10 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:18,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 states have internal predecessors, (385), 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) [2023-11-28 20:43:18,427 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 35.0) internal successors, (385), 11 states have internal predecessors, (385), 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) [2023-11-28 20:43:18,427 INFO L175 Difference]: Start difference. First operand has 174 places, 370 transitions, 4583 flow. Second operand 10 states and 175 transitions. [2023-11-28 20:43:18,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 577 transitions, 7903 flow [2023-11-28 20:43:18,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 577 transitions, 7498 flow, removed 34 selfloop flow, removed 15 redundant places. [2023-11-28 20:43:18,818 INFO L231 Difference]: Finished difference. Result has 171 places, 380 transitions, 4568 flow [2023-11-28 20:43:18,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4276, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4568, PETRI_PLACES=171, PETRI_TRANSITIONS=380} [2023-11-28 20:43:18,819 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 134 predicate places. [2023-11-28 20:43:18,819 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 380 transitions, 4568 flow [2023-11-28 20:43:18,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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) [2023-11-28 20:43:18,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:18,819 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] [2023-11-28 20:43:18,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:43:19,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:43:19,020 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:43:19,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1160819791, now seen corresponding path program 7 times [2023-11-28 20:43:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:19,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616694273] [2023-11-28 20:43:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:19,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:19,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616694273] [2023-11-28 20:43:19,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616694273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:19,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327316752] [2023-11-28 20:43:19,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:43:19,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:19,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:19,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:19,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:43:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:19,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:43:19,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:19,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:19,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327316752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:19,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:19,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-28 20:43:19,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696856271] [2023-11-28 20:43:19,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:19,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:43:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:19,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:43:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:43:19,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-28 20:43:19,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 380 transitions, 4568 flow. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 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) [2023-11-28 20:43:19,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:19,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-28 20:43:19,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:21,227 INFO L124 PetriNetUnfolderBase]: 5782/8915 cut-off events. [2023-11-28 20:43:21,227 INFO L125 PetriNetUnfolderBase]: For 71405/72064 co-relation queries the response was YES. [2023-11-28 20:43:21,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48230 conditions, 8915 events. 5782/8915 cut-off events. For 71405/72064 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 53585 event pairs, 1527 based on Foata normal form. 479/9327 useless extension candidates. Maximal degree in co-relation 46479. Up to 3320 conditions per place. [2023-11-28 20:43:21,311 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 420 selfloop transitions, 35 changer transitions 0/462 dead transitions. [2023-11-28 20:43:21,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 462 transitions, 6236 flow [2023-11-28 20:43:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:43:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 20:43:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2023-11-28 20:43:21,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-28 20:43:21,313 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 125 transitions. [2023-11-28 20:43:21,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 125 transitions. [2023-11-28 20:43:21,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:21,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 125 transitions. [2023-11-28 20:43:21,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 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) [2023-11-28 20:43:21,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 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) [2023-11-28 20:43:21,315 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 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) [2023-11-28 20:43:21,315 INFO L175 Difference]: Start difference. First operand has 171 places, 380 transitions, 4568 flow. Second operand 7 states and 125 transitions. [2023-11-28 20:43:21,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 462 transitions, 6236 flow [2023-11-28 20:43:21,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 462 transitions, 6217 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-28 20:43:21,613 INFO L231 Difference]: Finished difference. Result has 175 places, 349 transitions, 4231 flow [2023-11-28 20:43:21,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4231, PETRI_PLACES=175, PETRI_TRANSITIONS=349} [2023-11-28 20:43:21,614 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 138 predicate places. [2023-11-28 20:43:21,614 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 349 transitions, 4231 flow [2023-11-28 20:43:21,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 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) [2023-11-28 20:43:21,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:21,614 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] [2023-11-28 20:43:21,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:43:21,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:43:21,815 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:43:21,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1646520887, now seen corresponding path program 8 times [2023-11-28 20:43:21,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:21,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655753325] [2023-11-28 20:43:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:21,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:21,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:21,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655753325] [2023-11-28 20:43:21,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655753325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:21,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126151673] [2023-11-28 20:43:21,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:43:21,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:21,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:21,979 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:21,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:43:22,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:43:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:22,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:43:22,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:22,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:22,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126151673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:22,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:22,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-28 20:43:22,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591059031] [2023-11-28 20:43:22,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:22,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:43:22,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:22,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:43:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:43:22,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-28 20:43:22,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 349 transitions, 4231 flow. Second operand has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 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) [2023-11-28 20:43:22,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:22,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-28 20:43:22,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:24,125 INFO L124 PetriNetUnfolderBase]: 4898/7605 cut-off events. [2023-11-28 20:43:24,126 INFO L125 PetriNetUnfolderBase]: For 65104/65624 co-relation queries the response was YES. [2023-11-28 20:43:24,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41775 conditions, 7605 events. 4898/7605 cut-off events. For 65104/65624 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 45506 event pairs, 1227 based on Foata normal form. 558/8130 useless extension candidates. Maximal degree in co-relation 40756. Up to 2967 conditions per place. [2023-11-28 20:43:24,193 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 385 selfloop transitions, 28 changer transitions 5/426 dead transitions. [2023-11-28 20:43:24,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 426 transitions, 5872 flow [2023-11-28 20:43:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:43:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 20:43:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2023-11-28 20:43:24,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-28 20:43:24,195 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 125 transitions. [2023-11-28 20:43:24,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 125 transitions. [2023-11-28 20:43:24,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:24,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 125 transitions. [2023-11-28 20:43:24,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 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) [2023-11-28 20:43:24,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 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) [2023-11-28 20:43:24,197 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 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) [2023-11-28 20:43:24,197 INFO L175 Difference]: Start difference. First operand has 175 places, 349 transitions, 4231 flow. Second operand 7 states and 125 transitions. [2023-11-28 20:43:24,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 426 transitions, 5872 flow [2023-11-28 20:43:24,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 426 transitions, 5787 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-28 20:43:24,530 INFO L231 Difference]: Finished difference. Result has 179 places, 311 transitions, 3781 flow [2023-11-28 20:43:24,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3781, PETRI_PLACES=179, PETRI_TRANSITIONS=311} [2023-11-28 20:43:24,531 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 142 predicate places. [2023-11-28 20:43:24,531 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 311 transitions, 3781 flow [2023-11-28 20:43:24,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 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) [2023-11-28 20:43:24,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:24,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:24,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:43:24,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:24,733 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:43:24,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:24,733 INFO L85 PathProgramCache]: Analyzing trace with hash -864382422, now seen corresponding path program 1 times [2023-11-28 20:43:24,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:24,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041269921] [2023-11-28 20:43:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:24,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:43:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041269921] [2023-11-28 20:43:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041269921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746374406] [2023-11-28 20:43:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:24,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:24,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:24,864 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:24,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:43:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:25,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:43:25,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:43:25,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:43:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746374406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:25,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:25,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-28 20:43:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352502639] [2023-11-28 20:43:25,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:43:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:43:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:43:25,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-28 20:43:25,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 311 transitions, 3781 flow. Second operand has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 13 states have internal predecessors, (126), 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) [2023-11-28 20:43:25,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:25,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-28 20:43:25,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:26,485 INFO L124 PetriNetUnfolderBase]: 3156/5120 cut-off events. [2023-11-28 20:43:26,485 INFO L125 PetriNetUnfolderBase]: For 46093/46168 co-relation queries the response was YES. [2023-11-28 20:43:26,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28497 conditions, 5120 events. 3156/5120 cut-off events. For 46093/46168 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30343 event pairs, 1308 based on Foata normal form. 280/5394 useless extension candidates. Maximal degree in co-relation 27642. Up to 2715 conditions per place. [2023-11-28 20:43:26,535 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 133 selfloop transitions, 3 changer transitions 146/288 dead transitions. [2023-11-28 20:43:26,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 288 transitions, 4007 flow [2023-11-28 20:43:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:43:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:43:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2023-11-28 20:43:26,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-28 20:43:26,537 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 102 transitions. [2023-11-28 20:43:26,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 102 transitions. [2023-11-28 20:43:26,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:26,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 102 transitions. [2023-11-28 20:43:26,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2023-11-28 20:43:26,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-28 20:43:26,539 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 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) [2023-11-28 20:43:26,539 INFO L175 Difference]: Start difference. First operand has 179 places, 311 transitions, 3781 flow. Second operand 6 states and 102 transitions. [2023-11-28 20:43:26,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 288 transitions, 4007 flow [2023-11-28 20:43:26,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 288 transitions, 3795 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-11-28 20:43:26,804 INFO L231 Difference]: Finished difference. Result has 175 places, 142 transitions, 1415 flow [2023-11-28 20:43:26,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1415, PETRI_PLACES=175, PETRI_TRANSITIONS=142} [2023-11-28 20:43:26,805 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 138 predicate places. [2023-11-28 20:43:26,805 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 142 transitions, 1415 flow [2023-11-28 20:43:26,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 13 states have internal predecessors, (126), 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) [2023-11-28 20:43:26,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:26,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:43:26,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:43:27,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:27,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:43:27,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash 565746130, now seen corresponding path program 9 times [2023-11-28 20:43:27,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:27,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478981111] [2023-11-28 20:43:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:27,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:27,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478981111] [2023-11-28 20:43:27,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478981111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964335568] [2023-11-28 20:43:27,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:43:27,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:27,191 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:27,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:43:27,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:43:27,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:27,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:43:27,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:27,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:27,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964335568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:27,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:27,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-28 20:43:27,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965707478] [2023-11-28 20:43:27,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:27,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:43:27,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:27,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:43:27,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:43:27,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-28 20:43:27,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 142 transitions, 1415 flow. Second operand has 19 states, 19 states have (on average 7.684210526315789) internal successors, (146), 19 states have internal predecessors, (146), 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) [2023-11-28 20:43:27,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:27,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-28 20:43:27,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:29,455 INFO L124 PetriNetUnfolderBase]: 4510/6582 cut-off events. [2023-11-28 20:43:29,455 INFO L125 PetriNetUnfolderBase]: For 36398/36412 co-relation queries the response was YES. [2023-11-28 20:43:29,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33547 conditions, 6582 events. 4510/6582 cut-off events. For 36398/36412 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34375 event pairs, 372 based on Foata normal form. 34/6614 useless extension candidates. Maximal degree in co-relation 33483. Up to 3007 conditions per place. [2023-11-28 20:43:29,521 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 410 selfloop transitions, 70 changer transitions 0/484 dead transitions. [2023-11-28 20:43:29,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 484 transitions, 5395 flow [2023-11-28 20:43:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:43:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-28 20:43:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 257 transitions. [2023-11-28 20:43:29,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319327731092437 [2023-11-28 20:43:29,523 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 257 transitions. [2023-11-28 20:43:29,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 257 transitions. [2023-11-28 20:43:29,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:29,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 257 transitions. [2023-11-28 20:43:29,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 15.117647058823529) internal successors, (257), 17 states have internal predecessors, (257), 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) [2023-11-28 20:43:29,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 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) [2023-11-28 20:43:29,526 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 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) [2023-11-28 20:43:29,526 INFO L175 Difference]: Start difference. First operand has 175 places, 142 transitions, 1415 flow. Second operand 17 states and 257 transitions. [2023-11-28 20:43:29,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 484 transitions, 5395 flow [2023-11-28 20:43:29,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 484 transitions, 4912 flow, removed 187 selfloop flow, removed 28 redundant places. [2023-11-28 20:43:29,717 INFO L231 Difference]: Finished difference. Result has 127 places, 198 transitions, 1826 flow [2023-11-28 20:43:29,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1826, PETRI_PLACES=127, PETRI_TRANSITIONS=198} [2023-11-28 20:43:29,718 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 90 predicate places. [2023-11-28 20:43:29,718 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 198 transitions, 1826 flow [2023-11-28 20:43:29,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.684210526315789) internal successors, (146), 19 states have internal predecessors, (146), 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) [2023-11-28 20:43:29,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:29,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:43:29,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:43:29,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:43:29,919 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:43:29,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1446814334, now seen corresponding path program 10 times [2023-11-28 20:43:29,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:29,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541253392] [2023-11-28 20:43:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:29,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:43:30,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:30,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541253392] [2023-11-28 20:43:30,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541253392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:30,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856593357] [2023-11-28 20:43:30,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:43:30,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:30,051 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:30,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:43:30,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:43:30,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:30,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:43:30,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:43:30,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:43:30,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856593357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:30,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:30,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2023-11-28 20:43:30,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44164268] [2023-11-28 20:43:30,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:30,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 20:43:30,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 20:43:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:43:30,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-28 20:43:30,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 198 transitions, 1826 flow. Second operand has 16 states, 16 states have (on average 7.5) internal successors, (120), 16 states have internal predecessors, (120), 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) [2023-11-28 20:43:30,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:30,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-28 20:43:30,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:32,719 INFO L124 PetriNetUnfolderBase]: 9299/13323 cut-off events. [2023-11-28 20:43:32,719 INFO L125 PetriNetUnfolderBase]: For 56312/56312 co-relation queries the response was YES. [2023-11-28 20:43:32,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64971 conditions, 13323 events. 9299/13323 cut-off events. For 56312/56312 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 70151 event pairs, 765 based on Foata normal form. 62/13385 useless extension candidates. Maximal degree in co-relation 64907. Up to 5411 conditions per place. [2023-11-28 20:43:32,900 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 373 selfloop transitions, 276 changer transitions 0/650 dead transitions. [2023-11-28 20:43:32,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 650 transitions, 6807 flow [2023-11-28 20:43:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-28 20:43:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-28 20:43:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 386 transitions. [2023-11-28 20:43:32,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38029556650246304 [2023-11-28 20:43:32,903 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 386 transitions. [2023-11-28 20:43:32,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 386 transitions. [2023-11-28 20:43:32,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:32,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 386 transitions. [2023-11-28 20:43:32,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 13.310344827586206) internal successors, (386), 29 states have internal predecessors, (386), 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) [2023-11-28 20:43:32,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 35.0) internal successors, (1050), 30 states have internal predecessors, (1050), 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) [2023-11-28 20:43:32,907 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 35.0) internal successors, (1050), 30 states have internal predecessors, (1050), 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) [2023-11-28 20:43:32,908 INFO L175 Difference]: Start difference. First operand has 127 places, 198 transitions, 1826 flow. Second operand 29 states and 386 transitions. [2023-11-28 20:43:32,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 650 transitions, 6807 flow [2023-11-28 20:43:33,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 650 transitions, 6562 flow, removed 63 selfloop flow, removed 6 redundant places. [2023-11-28 20:43:33,374 INFO L231 Difference]: Finished difference. Result has 160 places, 383 transitions, 4357 flow [2023-11-28 20:43:33,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4357, PETRI_PLACES=160, PETRI_TRANSITIONS=383} [2023-11-28 20:43:33,375 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 123 predicate places. [2023-11-28 20:43:33,375 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 383 transitions, 4357 flow [2023-11-28 20:43:33,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.5) internal successors, (120), 16 states have internal predecessors, (120), 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) [2023-11-28 20:43:33,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:33,376 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:43:33,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:43:33,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:43:33,577 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:43:33,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:33,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1935072962, now seen corresponding path program 11 times [2023-11-28 20:43:33,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:33,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42784921] [2023-11-28 20:43:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:33,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:43:33,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:33,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42784921] [2023-11-28 20:43:33,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42784921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:33,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572005290] [2023-11-28 20:43:33,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:43:33,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:33,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:33,729 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:33,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:43:33,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-28 20:43:33,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:33,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:43:33,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:43:33,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:43:33,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572005290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:33,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:33,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-11-28 20:43:33,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942380655] [2023-11-28 20:43:33,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:33,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:43:33,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:43:33,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:43:34,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-28 20:43:34,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 383 transitions, 4357 flow. Second operand has 17 states, 17 states have (on average 7.0) internal successors, (119), 17 states have internal predecessors, (119), 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) [2023-11-28 20:43:34,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:34,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-28 20:43:34,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:38,195 INFO L124 PetriNetUnfolderBase]: 13250/18934 cut-off events. [2023-11-28 20:43:38,195 INFO L125 PetriNetUnfolderBase]: For 117386/117386 co-relation queries the response was YES. [2023-11-28 20:43:38,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102919 conditions, 18934 events. 13250/18934 cut-off events. For 117386/117386 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 102906 event pairs, 573 based on Foata normal form. 24/18958 useless extension candidates. Maximal degree in co-relation 102845. Up to 7853 conditions per place. [2023-11-28 20:43:38,369 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 489 selfloop transitions, 481 changer transitions 0/971 dead transitions. [2023-11-28 20:43:38,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 971 transitions, 12138 flow [2023-11-28 20:43:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-28 20:43:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-28 20:43:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 492 transitions. [2023-11-28 20:43:38,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699248120300752 [2023-11-28 20:43:38,372 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 492 transitions. [2023-11-28 20:43:38,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 492 transitions. [2023-11-28 20:43:38,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:38,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 492 transitions. [2023-11-28 20:43:38,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 12.947368421052632) internal successors, (492), 38 states have internal predecessors, (492), 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) [2023-11-28 20:43:38,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 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) [2023-11-28 20:43:38,378 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 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) [2023-11-28 20:43:38,378 INFO L175 Difference]: Start difference. First operand has 160 places, 383 transitions, 4357 flow. Second operand 38 states and 492 transitions. [2023-11-28 20:43:38,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 971 transitions, 12138 flow [2023-11-28 20:43:39,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 971 transitions, 11643 flow, removed 171 selfloop flow, removed 6 redundant places. [2023-11-28 20:43:39,545 INFO L231 Difference]: Finished difference. Result has 209 places, 659 transitions, 8825 flow [2023-11-28 20:43:39,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8825, PETRI_PLACES=209, PETRI_TRANSITIONS=659} [2023-11-28 20:43:39,546 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 172 predicate places. [2023-11-28 20:43:39,546 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 659 transitions, 8825 flow [2023-11-28 20:43:39,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0) internal successors, (119), 17 states have internal predecessors, (119), 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) [2023-11-28 20:43:39,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:39,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:43:39,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:43:39,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:39,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:43:39,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash -84579988, now seen corresponding path program 12 times [2023-11-28 20:43:39,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:39,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483207198] [2023-11-28 20:43:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:39,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:43:39,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483207198] [2023-11-28 20:43:39,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483207198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743070619] [2023-11-28 20:43:39,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:43:39,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:39,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:39,962 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:39,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:43:40,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:43:40,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:43:40,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:43:40,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:43:40,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:43:40,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743070619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:40,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:40,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-11-28 20:43:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16812370] [2023-11-28 20:43:40,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:40,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 20:43:40,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 20:43:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:43:40,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-28 20:43:40,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 659 transitions, 8825 flow. Second operand has 18 states, 18 states have (on average 6.888888888888889) internal successors, (124), 18 states have internal predecessors, (124), 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) [2023-11-28 20:43:40,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:40,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-28 20:43:40,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:43:49,775 INFO L124 PetriNetUnfolderBase]: 20130/28478 cut-off events. [2023-11-28 20:43:49,775 INFO L125 PetriNetUnfolderBase]: For 241686/241686 co-relation queries the response was YES. [2023-11-28 20:43:49,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173435 conditions, 28478 events. 20130/28478 cut-off events. For 241686/241686 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 161401 event pairs, 630 based on Foata normal form. 26/28504 useless extension candidates. Maximal degree in co-relation 173343. Up to 12019 conditions per place. [2023-11-28 20:43:50,101 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 1138 selfloop transitions, 861 changer transitions 0/2000 dead transitions. [2023-11-28 20:43:50,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 2000 transitions, 26438 flow [2023-11-28 20:43:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-28 20:43:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-11-28 20:43:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1368 transitions. [2023-11-28 20:43:50,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386987270155587 [2023-11-28 20:43:50,107 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 1368 transitions. [2023-11-28 20:43:50,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 1368 transitions. [2023-11-28 20:43:50,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:43:50,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 1368 transitions. [2023-11-28 20:43:50,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 13.544554455445544) internal successors, (1368), 101 states have internal predecessors, (1368), 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) [2023-11-28 20:43:50,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 35.0) internal successors, (3570), 102 states have internal predecessors, (3570), 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) [2023-11-28 20:43:50,119 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 35.0) internal successors, (3570), 102 states have internal predecessors, (3570), 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) [2023-11-28 20:43:50,119 INFO L175 Difference]: Start difference. First operand has 209 places, 659 transitions, 8825 flow. Second operand 101 states and 1368 transitions. [2023-11-28 20:43:50,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 2000 transitions, 26438 flow [2023-11-28 20:43:56,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 2000 transitions, 25893 flow, removed 269 selfloop flow, removed 4 redundant places. [2023-11-28 20:43:56,451 INFO L231 Difference]: Finished difference. Result has 332 places, 1078 transitions, 17218 flow [2023-11-28 20:43:56,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8536, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=17218, PETRI_PLACES=332, PETRI_TRANSITIONS=1078} [2023-11-28 20:43:56,452 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 295 predicate places. [2023-11-28 20:43:56,452 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1078 transitions, 17218 flow [2023-11-28 20:43:56,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.888888888888889) internal successors, (124), 18 states have internal predecessors, (124), 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) [2023-11-28 20:43:56,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:43:56,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:43:56,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 20:43:56,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:43:56,653 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:43:56,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash -336312764, now seen corresponding path program 13 times [2023-11-28 20:43:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:56,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232968551] [2023-11-28 20:43:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:56,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:43:56,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:56,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232968551] [2023-11-28 20:43:56,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232968551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:56,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233014638] [2023-11-28 20:43:56,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:43:56,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:56,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:56,822 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:56,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:43:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:56,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:43:56,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:43:57,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:43:57,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233014638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:57,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:57,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-28 20:43:57,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654170838] [2023-11-28 20:43:57,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:57,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-28 20:43:57,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-28 20:43:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:43:57,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-28 20:43:57,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1078 transitions, 17218 flow. Second operand has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 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) [2023-11-28 20:43:57,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:43:57,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-28 20:43:57,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:09,589 INFO L124 PetriNetUnfolderBase]: 24372/34509 cut-off events. [2023-11-28 20:44:09,589 INFO L125 PetriNetUnfolderBase]: For 421036/421036 co-relation queries the response was YES. [2023-11-28 20:44:09,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236553 conditions, 34509 events. 24372/34509 cut-off events. For 421036/421036 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 211150 event pairs, 645 based on Foata normal form. 18/34525 useless extension candidates. Maximal degree in co-relation 236433. Up to 16609 conditions per place. [2023-11-28 20:44:10,244 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 1214 selfloop transitions, 879 changer transitions 0/2097 dead transitions. [2023-11-28 20:44:10,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 2097 transitions, 34489 flow [2023-11-28 20:44:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-28 20:44:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-28 20:44:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 716 transitions. [2023-11-28 20:44:10,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48707482993197276 [2023-11-28 20:44:10,248 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 716 transitions. [2023-11-28 20:44:10,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 716 transitions. [2023-11-28 20:44:10,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:10,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 716 transitions. [2023-11-28 20:44:10,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 17.047619047619047) internal successors, (716), 42 states have internal predecessors, (716), 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) [2023-11-28 20:44:10,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 35.0) internal successors, (1505), 43 states have internal predecessors, (1505), 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) [2023-11-28 20:44:10,255 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 35.0) internal successors, (1505), 43 states have internal predecessors, (1505), 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) [2023-11-28 20:44:10,255 INFO L175 Difference]: Start difference. First operand has 332 places, 1078 transitions, 17218 flow. Second operand 42 states and 716 transitions. [2023-11-28 20:44:10,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 2097 transitions, 34489 flow [2023-11-28 20:44:23,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 2097 transitions, 30693 flow, removed 1081 selfloop flow, removed 14 redundant places. [2023-11-28 20:44:23,445 INFO L231 Difference]: Finished difference. Result has 361 places, 1435 transitions, 22067 flow [2023-11-28 20:44:23,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=15329, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=22067, PETRI_PLACES=361, PETRI_TRANSITIONS=1435} [2023-11-28 20:44:23,447 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 324 predicate places. [2023-11-28 20:44:23,447 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1435 transitions, 22067 flow [2023-11-28 20:44:23,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 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) [2023-11-28 20:44:23,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:23,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:44:23,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:44:23,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:44:23,648 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:44:23,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1136151392, now seen corresponding path program 14 times [2023-11-28 20:44:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:23,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446120083] [2023-11-28 20:44:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:23,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:44:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446120083] [2023-11-28 20:44:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446120083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537037685] [2023-11-28 20:44:23,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:44:23,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:23,821 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:23,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:44:23,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:44:23,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:23,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:44:23,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:44:24,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:44:24,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537037685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:24,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:24,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-28 20:44:24,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470795983] [2023-11-28 20:44:24,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:24,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:44:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:44:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:44:24,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-28 20:44:24,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1435 transitions, 22067 flow. Second operand has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 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) [2023-11-28 20:44:24,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:24,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-28 20:44:24,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:44:37,825 INFO L124 PetriNetUnfolderBase]: 25076/35511 cut-off events. [2023-11-28 20:44:37,825 INFO L125 PetriNetUnfolderBase]: For 365181/365181 co-relation queries the response was YES. [2023-11-28 20:44:38,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229487 conditions, 35511 events. 25076/35511 cut-off events. For 365181/365181 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 218922 event pairs, 1822 based on Foata normal form. 20/35529 useless extension candidates. Maximal degree in co-relation 229371. Up to 17267 conditions per place. [2023-11-28 20:44:38,409 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 882 selfloop transitions, 886 changer transitions 0/1772 dead transitions. [2023-11-28 20:44:38,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1772 transitions, 29262 flow [2023-11-28 20:44:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:44:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-28 20:44:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 275 transitions. [2023-11-28 20:44:38,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2023-11-28 20:44:38,411 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 275 transitions. [2023-11-28 20:44:38,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 275 transitions. [2023-11-28 20:44:38,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:44:38,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 275 transitions. [2023-11-28 20:44:38,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 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) [2023-11-28 20:44:38,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 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) [2023-11-28 20:44:38,414 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 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) [2023-11-28 20:44:38,414 INFO L175 Difference]: Start difference. First operand has 361 places, 1435 transitions, 22067 flow. Second operand 18 states and 275 transitions. [2023-11-28 20:44:38,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1772 transitions, 29262 flow [2023-11-28 20:44:47,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1772 transitions, 28473 flow, removed 101 selfloop flow, removed 11 redundant places. [2023-11-28 20:44:47,339 INFO L231 Difference]: Finished difference. Result has 371 places, 1505 transitions, 25334 flow [2023-11-28 20:44:47,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=21323, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=25334, PETRI_PLACES=371, PETRI_TRANSITIONS=1505} [2023-11-28 20:44:47,341 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 334 predicate places. [2023-11-28 20:44:47,341 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 1505 transitions, 25334 flow [2023-11-28 20:44:47,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 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) [2023-11-28 20:44:47,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:44:47,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:44:47,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:44:47,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:47,542 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:44:47,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash -210876354, now seen corresponding path program 15 times [2023-11-28 20:44:47,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:47,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209121387] [2023-11-28 20:44:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:47,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:44:47,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:47,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209121387] [2023-11-28 20:44:47,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209121387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:47,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056963486] [2023-11-28 20:44:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:44:47,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:47,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:47,683 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:47,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:44:47,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:44:47,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:44:47,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:44:47,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:44:47,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:44:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:44:48,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056963486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:48,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:48,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-28 20:44:48,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100236648] [2023-11-28 20:44:48,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:48,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:44:48,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:44:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:44:48,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-28 20:44:48,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1505 transitions, 25334 flow. Second operand has 20 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 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) [2023-11-28 20:44:48,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:44:48,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-28 20:44:48,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:45:02,277 INFO L124 PetriNetUnfolderBase]: 26274/37181 cut-off events. [2023-11-28 20:45:02,277 INFO L125 PetriNetUnfolderBase]: For 436030/436030 co-relation queries the response was YES. [2023-11-28 20:45:02,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250839 conditions, 37181 events. 26274/37181 cut-off events. For 436030/436030 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 230449 event pairs, 1540 based on Foata normal form. 20/37199 useless extension candidates. Maximal degree in co-relation 250725. Up to 17991 conditions per place. [2023-11-28 20:45:03,053 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 988 selfloop transitions, 1007 changer transitions 0/1999 dead transitions. [2023-11-28 20:45:03,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1999 transitions, 34575 flow [2023-11-28 20:45:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-28 20:45:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-28 20:45:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 434 transitions. [2023-11-28 20:45:03,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2023-11-28 20:45:03,055 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 434 transitions. [2023-11-28 20:45:03,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 434 transitions. [2023-11-28 20:45:03,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:45:03,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 434 transitions. [2023-11-28 20:45:03,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 16.074074074074073) internal successors, (434), 27 states have internal predecessors, (434), 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) [2023-11-28 20:45:03,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 35.0) internal successors, (980), 28 states have internal predecessors, (980), 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) [2023-11-28 20:45:03,059 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 35.0) internal successors, (980), 28 states have internal predecessors, (980), 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) [2023-11-28 20:45:03,059 INFO L175 Difference]: Start difference. First operand has 371 places, 1505 transitions, 25334 flow. Second operand 27 states and 434 transitions. [2023-11-28 20:45:03,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1999 transitions, 34575 flow [2023-11-28 20:45:14,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1999 transitions, 34454 flow, removed 57 selfloop flow, removed 4 redundant places. [2023-11-28 20:45:14,549 INFO L231 Difference]: Finished difference. Result has 398 places, 1602 transitions, 29176 flow [2023-11-28 20:45:14,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=25213, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=925, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29176, PETRI_PLACES=398, PETRI_TRANSITIONS=1602} [2023-11-28 20:45:14,551 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 361 predicate places. [2023-11-28 20:45:14,551 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1602 transitions, 29176 flow [2023-11-28 20:45:14,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 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) [2023-11-28 20:45:14,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:45:14,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:45:14,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 20:45:14,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:14,752 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:45:14,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2099187140, now seen corresponding path program 16 times [2023-11-28 20:45:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:14,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839414760] [2023-11-28 20:45:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:14,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:45:14,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:14,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839414760] [2023-11-28 20:45:14,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839414760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:14,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673646049] [2023-11-28 20:45:14,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:45:14,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:14,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:14,895 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:14,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:45:15,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:45:15,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:15,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:45:15,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:45:15,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:45:15,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673646049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:15,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:15,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-28 20:45:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795596075] [2023-11-28 20:45:15,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:15,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:45:15,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:15,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:45:15,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:45:15,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-28 20:45:15,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1602 transitions, 29176 flow. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 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) [2023-11-28 20:45:15,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:45:15,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-28 20:45:15,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:45:37,268 INFO L124 PetriNetUnfolderBase]: 36704/51537 cut-off events. [2023-11-28 20:45:37,268 INFO L125 PetriNetUnfolderBase]: For 715049/715049 co-relation queries the response was YES. [2023-11-28 20:45:37,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361679 conditions, 51537 events. 36704/51537 cut-off events. For 715049/715049 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 312241 event pairs, 2803 based on Foata normal form. 24/51561 useless extension candidates. Maximal degree in co-relation 361559. Up to 22307 conditions per place. [2023-11-28 20:45:38,308 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 850 selfloop transitions, 1259 changer transitions 0/2110 dead transitions. [2023-11-28 20:45:38,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 2110 transitions, 38492 flow [2023-11-28 20:45:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-28 20:45:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-28 20:45:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 648 transitions. [2023-11-28 20:45:38,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939209726443769 [2023-11-28 20:45:38,310 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 648 transitions. [2023-11-28 20:45:38,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 648 transitions. [2023-11-28 20:45:38,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:45:38,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 648 transitions. [2023-11-28 20:45:38,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 13.787234042553191) internal successors, (648), 47 states have internal predecessors, (648), 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) [2023-11-28 20:45:38,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 35.0) internal successors, (1680), 48 states have internal predecessors, (1680), 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) [2023-11-28 20:45:38,315 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 35.0) internal successors, (1680), 48 states have internal predecessors, (1680), 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) [2023-11-28 20:45:38,315 INFO L175 Difference]: Start difference. First operand has 398 places, 1602 transitions, 29176 flow. Second operand 47 states and 648 transitions. [2023-11-28 20:45:38,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 2110 transitions, 38492 flow [2023-11-28 20:46:03,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2110 transitions, 37790 flow, removed 131 selfloop flow, removed 14 redundant places. [2023-11-28 20:46:03,360 INFO L231 Difference]: Finished difference. Result has 436 places, 1732 transitions, 34033 flow [2023-11-28 20:46:03,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=28461, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=34033, PETRI_PLACES=436, PETRI_TRANSITIONS=1732} [2023-11-28 20:46:03,362 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 399 predicate places. [2023-11-28 20:46:03,362 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1732 transitions, 34033 flow [2023-11-28 20:46:03,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 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) [2023-11-28 20:46:03,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:46:03,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:46:03,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 20:46:03,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:03,563 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:46:03,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1148355756, now seen corresponding path program 2 times [2023-11-28 20:46:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:46:03,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040046836] [2023-11-28 20:46:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:03,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:46:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:06,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:46:06,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040046836] [2023-11-28 20:46:06,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040046836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:46:06,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628897088] [2023-11-28 20:46:06,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:46:06,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:06,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:46:06,354 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:46:06,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:46:06,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:46:06,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:46:06,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-28 20:46:06,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:08,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:46:08,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 80 [2023-11-28 20:46:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:08,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:46:12,338 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-28 20:46:12,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 567 treesize of output 265 [2023-11-28 20:46:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628897088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:46:17,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:46:17,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 43 [2023-11-28 20:46:17,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022245482] [2023-11-28 20:46:17,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:46:17,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-28 20:46:17,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:46:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-28 20:46:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1723, Unknown=0, NotChecked=0, Total=1892 [2023-11-28 20:46:17,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-28 20:46:17,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1732 transitions, 34033 flow. Second operand has 44 states, 44 states have (on average 7.25) internal successors, (319), 44 states have internal predecessors, (319), 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) [2023-11-28 20:46:17,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:46:17,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-28 20:46:17,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:47:33,187 INFO L124 PetriNetUnfolderBase]: 52170/76123 cut-off events. [2023-11-28 20:47:33,187 INFO L125 PetriNetUnfolderBase]: For 1104063/1107051 co-relation queries the response was YES. [2023-11-28 20:47:34,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548753 conditions, 76123 events. 52170/76123 cut-off events. For 1104063/1107051 co-relation queries the response was YES. Maximal size of possible extension queue 2103. Compared 534075 event pairs, 3081 based on Foata normal form. 578/76446 useless extension candidates. Maximal degree in co-relation 548300. Up to 51429 conditions per place. [2023-11-28 20:47:34,620 INFO L140 encePairwiseOnDemand]: 18/35 looper letters, 3466 selfloop transitions, 1500 changer transitions 2/5152 dead transitions. [2023-11-28 20:47:34,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 5152 transitions, 99774 flow [2023-11-28 20:47:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-11-28 20:47:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2023-11-28 20:47:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 1870 transitions. [2023-11-28 20:47:34,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38437821171634123 [2023-11-28 20:47:34,626 INFO L72 ComplementDD]: Start complementDD. Operand 139 states and 1870 transitions. [2023-11-28 20:47:34,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 1870 transitions. [2023-11-28 20:47:34,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:47:34,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 139 states and 1870 transitions. [2023-11-28 20:47:34,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 140 states, 139 states have (on average 13.453237410071942) internal successors, (1870), 139 states have internal predecessors, (1870), 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) [2023-11-28 20:47:34,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 140 states, 140 states have (on average 35.0) internal successors, (4900), 140 states have internal predecessors, (4900), 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) [2023-11-28 20:47:34,644 INFO L81 ComplementDD]: Finished complementDD. Result has 140 states, 140 states have (on average 35.0) internal successors, (4900), 140 states have internal predecessors, (4900), 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) [2023-11-28 20:47:34,644 INFO L175 Difference]: Start difference. First operand has 436 places, 1732 transitions, 34033 flow. Second operand 139 states and 1870 transitions. [2023-11-28 20:47:34,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 5152 transitions, 99774 flow [2023-11-28 20:48:32,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 5152 transitions, 97729 flow, removed 151 selfloop flow, removed 10 redundant places. [2023-11-28 20:48:32,243 INFO L231 Difference]: Finished difference. Result has 652 places, 3326 transitions, 65993 flow [2023-11-28 20:48:32,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=33262, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=139, PETRI_FLOW=65993, PETRI_PLACES=652, PETRI_TRANSITIONS=3326} [2023-11-28 20:48:32,245 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 615 predicate places. [2023-11-28 20:48:32,245 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 3326 transitions, 65993 flow [2023-11-28 20:48:32,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.25) internal successors, (319), 44 states have internal predecessors, (319), 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) [2023-11-28 20:48:32,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:48:32,246 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-11-28 20:48:32,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-28 20:48:32,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:48:32,446 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 20:48:32,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:48:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1809765990, now seen corresponding path program 3 times [2023-11-28 20:48:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:48:32,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288702413] [2023-11-28 20:48:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:48:32,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:48:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:48:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:48:35,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:48:35,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288702413] [2023-11-28 20:48:35,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288702413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:48:35,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793278100] [2023-11-28 20:48:35,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:48:35,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:48:35,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:48:35,257 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:48:35,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76c4379f-1cca-491e-ae5d-5657e9490b79/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 20:48:35,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:48:35,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:48:35,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-28 20:48:35,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:48:35,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:48:37,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:48:37,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 98 [2023-11-28 20:48:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:48:39,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:48:59,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 365 treesize of output 325 [2023-11-28 20:48:59,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:48:59,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 547 treesize of output 444 [2023-11-28 20:49:01,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 641 treesize of output 577 [2023-11-28 20:49:01,848 INFO L349 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-11-28 20:49:01,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 883 treesize of output 706 [2023-11-28 20:49:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:49:03,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793278100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:49:03,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:49:03,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 45 [2023-11-28 20:49:03,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193153558] [2023-11-28 20:49:03,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:49:03,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-28 20:49:03,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:49:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-28 20:49:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2023-11-28 20:49:04,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-28 20:49:04,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 3326 transitions, 65993 flow. Second operand has 46 states, 46 states have (on average 6.217391304347826) internal successors, (286), 46 states have internal predecessors, (286), 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) [2023-11-28 20:49:04,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:49:04,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-28 20:49:04,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand