./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ --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 df63a9317cd159d15f0c87211084d5e90c66afa781f3187352107d14a3f61024 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:23:34,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:23:34,581 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:23:34,586 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:23:34,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:23:34,618 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:23:34,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:23:34,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:23:34,628 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:23:34,633 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:23:34,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:23:34,634 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:23:34,635 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:23:34,636 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:23:34,637 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:23:34,637 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:23:34,638 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:23:34,638 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:23:34,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:23:34,639 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:23:34,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:23:34,640 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:23:34,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:23:34,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:23:34,641 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:23:34,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:23:34,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:23:34,643 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:23:34,643 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:23:34,643 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:23:34,645 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:23:34,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:23:34,645 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:23:34,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:23:34,646 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:23:34,646 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:23:34,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:23:34,646 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:23:34,647 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:23:34,647 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:23:34,647 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:23:34,648 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:23:34,648 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_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df63a9317cd159d15f0c87211084d5e90c66afa781f3187352107d14a3f61024 [2023-11-23 22:23:34,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:23:34,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:23:34,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:23:34,965 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:23:34,966 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:23:34,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2023-11-23 22:23:38,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:23:38,326 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:23:38,327 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2023-11-23 22:23:38,336 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/data/63dc46517/2c41976a46434599b83d62cfbbd62ae1/FLAG5693518f8 [2023-11-23 22:23:38,351 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/data/63dc46517/2c41976a46434599b83d62cfbbd62ae1 [2023-11-23 22:23:38,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:23:38,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:23:38,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:23:38,358 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:23:38,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:23:38,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@491f2912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38, skipping insertion in model container [2023-11-23 22:23:38,366 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,395 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:23:38,593 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_dd800125-2001-43aa-b55a-261f7b760b73/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2904,2917] [2023-11-23 22:23:38,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:23:38,610 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:23:38,655 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_dd800125-2001-43aa-b55a-261f7b760b73/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2904,2917] [2023-11-23 22:23:38,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:23:38,687 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:23:38,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38 WrapperNode [2023-11-23 22:23:38,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:23:38,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:23:38,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:23:38,690 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:23:38,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,739 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 131 [2023-11-23 22:23:38,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:23:38,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:23:38,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:23:38,741 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:23:38,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,758 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,775 INFO L189 HeapSplitter]: Split 14 memory accesses to 7 slices as follows [2, 2, 2, 2, 2, 2, 2] [2023-11-23 22:23:38,775 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,775 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,790 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,793 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,795 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,799 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:23:38,801 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:23:38,801 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:23:38,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:23:38,802 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (1/1) ... [2023-11-23 22:23:38,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:23:38,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:23:38,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:23:38,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:23:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:23:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:23:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:23:38,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:23:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:23:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:23:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:23:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 22:23:38,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-23 22:23:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:23:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:23:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:23:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:23:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:23:38,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 22:23:38,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-23 22:23:38,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:23:38,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:23:38,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:23:38,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:23:38,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:23:38,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:23:38,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-23 22:23:38,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-23 22:23:38,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:23:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:23:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:23:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:23:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:23:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 22:23:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-23 22:23:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-23 22:23:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-23 22:23:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-23 22:23:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-23 22:23:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:23:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:23:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:23:38,892 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:23:39,042 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:23:39,044 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:23:39,378 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:23:39,687 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:23:39,687 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 22:23:39,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:23:39 BoogieIcfgContainer [2023-11-23 22:23:39,688 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:23:39,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:23:39,695 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:23:39,698 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:23:39,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:23:38" (1/3) ... [2023-11-23 22:23:39,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d4cef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:23:39, skipping insertion in model container [2023-11-23 22:23:39,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:23:38" (2/3) ... [2023-11-23 22:23:39,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d4cef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:23:39, skipping insertion in model container [2023-11-23 22:23:39,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:23:39" (3/3) ... [2023-11-23 22:23:39,703 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3-opt.wvr.c [2023-11-23 22:23:39,714 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:23:39,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:23:39,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:23:39,726 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:23:39,858 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-23 22:23:39,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 144 flow [2023-11-23 22:23:39,987 INFO L124 PetriNetUnfolderBase]: 6/45 cut-off events. [2023-11-23 22:23:39,987 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-23 22:23:39,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 45 events. 6/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-23 22:23:39,993 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 144 flow [2023-11-23 22:23:40,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 124 flow [2023-11-23 22:23:40,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:23:40,033 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;@71ae1592, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:23:40,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-23 22:23:40,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:23:40,066 INFO L124 PetriNetUnfolderBase]: 6/43 cut-off events. [2023-11-23 22:23:40,066 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-23 22:23:40,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:23:40,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:23:40,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:23:40,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:23:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1009835643, now seen corresponding path program 1 times [2023-11-23 22:23:40,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:23:40,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458892938] [2023-11-23 22:23:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:23:40,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:23:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:23:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:23:40,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:23:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458892938] [2023-11-23 22:23:40,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458892938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:23:40,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:23:40,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:23:40,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391228809] [2023-11-23 22:23:40,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:23:40,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:23:40,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:23:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:23:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:23:40,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:23:40,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:40,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:23:40,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:23:40,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:23:44,723 INFO L124 PetriNetUnfolderBase]: 24533/28583 cut-off events. [2023-11-23 22:23:44,724 INFO L125 PetriNetUnfolderBase]: For 1331/1331 co-relation queries the response was YES. [2023-11-23 22:23:44,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58276 conditions, 28583 events. 24533/28583 cut-off events. For 1331/1331 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 101035 event pairs, 4426 based on Foata normal form. 1/15580 useless extension candidates. Maximal degree in co-relation 44796. Up to 18741 conditions per place. [2023-11-23 22:23:45,064 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 59 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-11-23 22:23:45,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 70 transitions, 323 flow [2023-11-23 22:23:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:23:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:23:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-23 22:23:45,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673202614379085 [2023-11-23 22:23:45,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-23 22:23:45,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-23 22:23:45,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:23:45,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-23 22:23:45,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:45,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:45,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:45,095 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 124 flow. Second operand 3 states and 103 transitions. [2023-11-23 22:23:45,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 70 transitions, 323 flow [2023-11-23 22:23:45,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 285 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-23 22:23:45,197 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 119 flow [2023-11-23 22:23:45,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-23 22:23:45,203 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-11-23 22:23:45,204 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 119 flow [2023-11-23 22:23:45,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:45,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:23:45,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:23:45,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:23:45,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:23:45,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:23:45,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1685349170, now seen corresponding path program 1 times [2023-11-23 22:23:45,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:23:45,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754695402] [2023-11-23 22:23:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:23:45,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:23:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:23:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:23:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:23:45,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754695402] [2023-11-23 22:23:45,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754695402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:23:45,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:23:45,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:23:45,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172986372] [2023-11-23 22:23:45,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:23:45,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:23:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:23:45,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:23:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:23:45,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:23:45,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:45,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:23:45,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:23:45,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:23:49,576 INFO L124 PetriNetUnfolderBase]: 33457/39075 cut-off events. [2023-11-23 22:23:49,576 INFO L125 PetriNetUnfolderBase]: For 5276/5276 co-relation queries the response was YES. [2023-11-23 22:23:49,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85625 conditions, 39075 events. 33457/39075 cut-off events. For 5276/5276 co-relation queries the response was YES. Maximal size of possible extension queue 1254. Compared 148239 event pairs, 5731 based on Foata normal form. 1/26720 useless extension candidates. Maximal degree in co-relation 26650. Up to 27052 conditions per place. [2023-11-23 22:23:49,819 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 63 selfloop transitions, 3 changer transitions 9/82 dead transitions. [2023-11-23 22:23:49,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 362 flow [2023-11-23 22:23:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:23:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:23:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-23 22:23:49,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7254901960784313 [2023-11-23 22:23:49,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-23 22:23:49,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-23 22:23:49,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:23:49,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-23 22:23:49,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:49,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:49,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:49,837 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 119 flow. Second operand 3 states and 111 transitions. [2023-11-23 22:23:49,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 362 flow [2023-11-23 22:23:49,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 82 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:23:49,843 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 135 flow [2023-11-23 22:23:49,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-11-23 22:23:49,844 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-23 22:23:49,845 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 135 flow [2023-11-23 22:23:49,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:49,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:23:49,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:23:49,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:23:49,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:23:49,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:23:49,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2075634054, now seen corresponding path program 1 times [2023-11-23 22:23:49,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:23:49,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973640055] [2023-11-23 22:23:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:23:49,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:23:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:23:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:23:50,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:23:50,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973640055] [2023-11-23 22:23:50,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973640055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:23:50,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:23:50,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:23:50,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728528585] [2023-11-23 22:23:50,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:23:50,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:23:50,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:23:50,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:23:50,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:23:50,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:23:50,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:50,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:23:50,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:23:50,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:23:53,946 INFO L124 PetriNetUnfolderBase]: 42571/50180 cut-off events. [2023-11-23 22:23:53,946 INFO L125 PetriNetUnfolderBase]: For 14213/14213 co-relation queries the response was YES. [2023-11-23 22:23:54,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116808 conditions, 50180 events. 42571/50180 cut-off events. For 14213/14213 co-relation queries the response was YES. Maximal size of possible extension queue 1681. Compared 201601 event pairs, 6874 based on Foata normal form. 1/41482 useless extension candidates. Maximal degree in co-relation 48426. Up to 36442 conditions per place. [2023-11-23 22:23:54,263 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 67 selfloop transitions, 3 changer transitions 5/82 dead transitions. [2023-11-23 22:23:54,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 82 transitions, 380 flow [2023-11-23 22:23:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:23:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:23:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-23 22:23:54,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6993464052287581 [2023-11-23 22:23:54,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-23 22:23:54,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-23 22:23:54,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:23:54,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-23 22:23:54,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:54,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:54,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:54,276 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 135 flow. Second operand 3 states and 107 transitions. [2023-11-23 22:23:54,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 82 transitions, 380 flow [2023-11-23 22:23:54,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 82 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:23:54,284 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 151 flow [2023-11-23 22:23:54,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-11-23 22:23:54,286 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-11-23 22:23:54,287 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 151 flow [2023-11-23 22:23:54,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:54,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:23:54,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:23:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:23:54,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:23:54,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:23:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash -909273287, now seen corresponding path program 1 times [2023-11-23 22:23:54,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:23:54,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404565825] [2023-11-23 22:23:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:23:54,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:23:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:23:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:23:54,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:23:54,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404565825] [2023-11-23 22:23:54,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404565825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:23:54,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794114487] [2023-11-23 22:23:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:23:54,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:23:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:23:54,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:23:54,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:23:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:23:54,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:23:54,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:23:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:23:54,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:23:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:23:54,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794114487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:23:54,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:23:54,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-23 22:23:54,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105058884] [2023-11-23 22:23:54,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:23:54,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:23:54,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:23:54,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:23:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:23:54,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:23:54,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 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) [2023-11-23 22:23:54,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:23:54,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:23:54,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:23:59,409 INFO L124 PetriNetUnfolderBase]: 48377/57563 cut-off events. [2023-11-23 22:23:59,409 INFO L125 PetriNetUnfolderBase]: For 22080/22080 co-relation queries the response was YES. [2023-11-23 22:23:59,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144391 conditions, 57563 events. 48377/57563 cut-off events. For 22080/22080 co-relation queries the response was YES. Maximal size of possible extension queue 1926. Compared 247964 event pairs, 7315 based on Foata normal form. 1125/58288 useless extension candidates. Maximal degree in co-relation 46330. Up to 26288 conditions per place. [2023-11-23 22:23:59,735 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 113 selfloop transitions, 6 changer transitions 19/145 dead transitions. [2023-11-23 22:23:59,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 145 transitions, 703 flow [2023-11-23 22:23:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:23:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:23:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2023-11-23 22:23:59,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7450980392156863 [2023-11-23 22:23:59,743 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 190 transitions. [2023-11-23 22:23:59,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 190 transitions. [2023-11-23 22:23:59,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:23:59,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 190 transitions. [2023-11-23 22:23:59,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:59,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:59,748 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:23:59,750 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 151 flow. Second operand 5 states and 190 transitions. [2023-11-23 22:23:59,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 145 transitions, 703 flow [2023-11-23 22:23:59,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 145 transitions, 694 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:23:59,758 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 185 flow [2023-11-23 22:23:59,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-11-23 22:23:59,761 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2023-11-23 22:23:59,761 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 185 flow [2023-11-23 22:23:59,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 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) [2023-11-23 22:23:59,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:23:59,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:23:59,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:23:59,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:23:59,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:23:59,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:23:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2023366673, now seen corresponding path program 1 times [2023-11-23 22:23:59,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:23:59,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491071623] [2023-11-23 22:23:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:23:59,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:24:00,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:00,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491071623] [2023-11-23 22:24:00,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491071623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:00,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:00,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:24:00,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238820468] [2023-11-23 22:24:00,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:00,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:24:00,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:24:00,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:24:00,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:24:00,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:00,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:24:00,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:24:00,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:24:05,014 INFO L124 PetriNetUnfolderBase]: 48167/57238 cut-off events. [2023-11-23 22:24:05,014 INFO L125 PetriNetUnfolderBase]: For 35731/35731 co-relation queries the response was YES. [2023-11-23 22:24:05,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155080 conditions, 57238 events. 48167/57238 cut-off events. For 35731/35731 co-relation queries the response was YES. Maximal size of possible extension queue 1895. Compared 244705 event pairs, 1126 based on Foata normal form. 706/57844 useless extension candidates. Maximal degree in co-relation 56050. Up to 22511 conditions per place. [2023-11-23 22:24:05,334 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 90 selfloop transitions, 4 changer transitions 40/141 dead transitions. [2023-11-23 22:24:05,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 141 transitions, 723 flow [2023-11-23 22:24:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:24:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:24:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2023-11-23 22:24:05,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2023-11-23 22:24:05,336 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 180 transitions. [2023-11-23 22:24:05,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 180 transitions. [2023-11-23 22:24:05,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:24:05,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 180 transitions. [2023-11-23 22:24:05,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:05,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:05,339 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:05,340 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 185 flow. Second operand 5 states and 180 transitions. [2023-11-23 22:24:05,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 141 transitions, 723 flow [2023-11-23 22:24:06,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 141 transitions, 717 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 22:24:06,239 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 193 flow [2023-11-23 22:24:06,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-11-23 22:24:06,240 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-11-23 22:24:06,240 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 193 flow [2023-11-23 22:24:06,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:06,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:24:06,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:06,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:24:06,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:24:06,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:06,243 INFO L85 PathProgramCache]: Analyzing trace with hash 360947315, now seen corresponding path program 2 times [2023-11-23 22:24:06,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:06,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084763375] [2023-11-23 22:24:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:06,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:24:06,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:06,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084763375] [2023-11-23 22:24:06,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084763375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:06,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:06,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:24:06,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286562952] [2023-11-23 22:24:06,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:06,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:24:06,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:06,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:24:06,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:24:06,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:24:06,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:06,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:24:06,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:24:06,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:24:09,545 INFO L124 PetriNetUnfolderBase]: 32115/38228 cut-off events. [2023-11-23 22:24:09,545 INFO L125 PetriNetUnfolderBase]: For 41160/41164 co-relation queries the response was YES. [2023-11-23 22:24:09,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111974 conditions, 38228 events. 32115/38228 cut-off events. For 41160/41164 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 156038 event pairs, 4379 based on Foata normal form. 830/38684 useless extension candidates. Maximal degree in co-relation 54571. Up to 18656 conditions per place. [2023-11-23 22:24:09,821 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 125 selfloop transitions, 6 changer transitions 11/149 dead transitions. [2023-11-23 22:24:09,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 149 transitions, 844 flow [2023-11-23 22:24:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:24:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:24:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2023-11-23 22:24:09,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7137254901960784 [2023-11-23 22:24:09,823 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 182 transitions. [2023-11-23 22:24:09,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 182 transitions. [2023-11-23 22:24:09,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:24:09,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 182 transitions. [2023-11-23 22:24:09,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:09,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:09,829 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:09,829 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 193 flow. Second operand 5 states and 182 transitions. [2023-11-23 22:24:09,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 149 transitions, 844 flow [2023-11-23 22:24:09,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 149 transitions, 831 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-23 22:24:09,863 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 223 flow [2023-11-23 22:24:09,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-11-23 22:24:09,867 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2023-11-23 22:24:09,867 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 223 flow [2023-11-23 22:24:09,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:09,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:24:09,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:09,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:24:09,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:24:09,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash -769097898, now seen corresponding path program 1 times [2023-11-23 22:24:09,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:09,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361133356] [2023-11-23 22:24:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:09,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:24:10,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:10,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361133356] [2023-11-23 22:24:10,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361133356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:24:10,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493324357] [2023-11-23 22:24:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:10,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:24:10,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:24:10,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:24:10,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:24:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:10,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:24:10,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:24:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:24:10,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:24:10,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493324357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:10,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:24:10,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-23 22:24:10,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708030113] [2023-11-23 22:24:10,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:10,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:24:10,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:10,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:24:10,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:24:10,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:24:10,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:10,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:24:10,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:24:10,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:24:13,661 INFO L124 PetriNetUnfolderBase]: 31327/37354 cut-off events. [2023-11-23 22:24:13,661 INFO L125 PetriNetUnfolderBase]: For 43074/43074 co-relation queries the response was YES. [2023-11-23 22:24:13,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121212 conditions, 37354 events. 31327/37354 cut-off events. For 43074/43074 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 154942 event pairs, 1613 based on Foata normal form. 972/38184 useless extension candidates. Maximal degree in co-relation 53281. Up to 29420 conditions per place. [2023-11-23 22:24:14,238 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 98 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2023-11-23 22:24:14,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 640 flow [2023-11-23 22:24:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:24:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:24:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2023-11-23 22:24:14,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2023-11-23 22:24:14,241 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 131 transitions. [2023-11-23 22:24:14,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 131 transitions. [2023-11-23 22:24:14,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:24:14,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 131 transitions. [2023-11-23 22:24:14,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:14,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:14,243 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:14,243 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 223 flow. Second operand 4 states and 131 transitions. [2023-11-23 22:24:14,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 640 flow [2023-11-23 22:24:14,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 627 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-23 22:24:14,467 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 236 flow [2023-11-23 22:24:14,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-11-23 22:24:14,468 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2023-11-23 22:24:14,468 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 236 flow [2023-11-23 22:24:14,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:14,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:24:14,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:14,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:24:14,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:24:14,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:24:14,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:14,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1004099531, now seen corresponding path program 1 times [2023-11-23 22:24:14,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:14,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723674974] [2023-11-23 22:24:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:14,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:24:14,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:14,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723674974] [2023-11-23 22:24:14,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723674974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:14,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:14,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:24:14,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737578290] [2023-11-23 22:24:14,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:14,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:24:14,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:14,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:24:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:24:14,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:24:14,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:14,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:24:14,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:24:14,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:24:17,935 INFO L124 PetriNetUnfolderBase]: 30923/36946 cut-off events. [2023-11-23 22:24:17,935 INFO L125 PetriNetUnfolderBase]: For 53194/53198 co-relation queries the response was YES. [2023-11-23 22:24:18,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124534 conditions, 36946 events. 30923/36946 cut-off events. For 53194/53198 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 150599 event pairs, 736 based on Foata normal form. 427/37269 useless extension candidates. Maximal degree in co-relation 89717. Up to 14469 conditions per place. [2023-11-23 22:24:18,156 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 102 selfloop transitions, 4 changer transitions 40/153 dead transitions. [2023-11-23 22:24:18,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 153 transitions, 946 flow [2023-11-23 22:24:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:24:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:24:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2023-11-23 22:24:18,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6901960784313725 [2023-11-23 22:24:18,158 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 176 transitions. [2023-11-23 22:24:18,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 176 transitions. [2023-11-23 22:24:18,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:24:18,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 176 transitions. [2023-11-23 22:24:18,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:18,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:18,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:18,161 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 236 flow. Second operand 5 states and 176 transitions. [2023-11-23 22:24:18,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 153 transitions, 946 flow [2023-11-23 22:24:18,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 153 transitions, 928 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:24:18,741 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 243 flow [2023-11-23 22:24:18,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-11-23 22:24:18,742 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-11-23 22:24:18,742 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 243 flow [2023-11-23 22:24:18,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:18,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:24:18,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:18,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:24:18,743 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:24:18,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1198716751, now seen corresponding path program 2 times [2023-11-23 22:24:18,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:18,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167097715] [2023-11-23 22:24:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:18,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:24:18,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167097715] [2023-11-23 22:24:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167097715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:18,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:18,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:24:18,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649479920] [2023-11-23 22:24:18,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:18,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:24:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:24:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:24:18,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:24:18,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:18,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:24:18,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:24:18,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:24:21,953 INFO L124 PetriNetUnfolderBase]: 22581/27108 cut-off events. [2023-11-23 22:24:21,954 INFO L125 PetriNetUnfolderBase]: For 55380/55384 co-relation queries the response was YES. [2023-11-23 22:24:22,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96484 conditions, 27108 events. 22581/27108 cut-off events. For 55380/55384 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 107103 event pairs, 3495 based on Foata normal form. 488/27139 useless extension candidates. Maximal degree in co-relation 70039. Up to 10761 conditions per place. [2023-11-23 22:24:22,133 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 141 selfloop transitions, 6 changer transitions 3/157 dead transitions. [2023-11-23 22:24:22,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 157 transitions, 1037 flow [2023-11-23 22:24:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:24:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:24:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2023-11-23 22:24:22,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6823529411764706 [2023-11-23 22:24:22,135 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 174 transitions. [2023-11-23 22:24:22,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 174 transitions. [2023-11-23 22:24:22,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:24:22,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 174 transitions. [2023-11-23 22:24:22,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:22,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:22,137 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:22,138 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 243 flow. Second operand 5 states and 174 transitions. [2023-11-23 22:24:22,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 157 transitions, 1037 flow [2023-11-23 22:24:22,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 157 transitions, 1024 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-23 22:24:22,171 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 273 flow [2023-11-23 22:24:22,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2023-11-23 22:24:22,172 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-11-23 22:24:22,172 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 273 flow [2023-11-23 22:24:22,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:22,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:24:22,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:22,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:24:22,173 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-23 22:24:22,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:22,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1743484426, now seen corresponding path program 1 times [2023-11-23 22:24:22,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:22,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833197206] [2023-11-23 22:24:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:22,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:24:22,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833197206] [2023-11-23 22:24:22,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833197206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:24:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251185332] [2023-11-23 22:24:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:22,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:24:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:24:22,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:24:22,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:24:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:22,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:24:22,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:24:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:24:22,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:24:22,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251185332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:22,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:24:22,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-23 22:24:22,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943146808] [2023-11-23 22:24:22,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:22,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:24:22,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:24:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:24:22,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:24:22,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:22,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:24:22,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:24:22,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:24:25,186 INFO L124 PetriNetUnfolderBase]: 21673/26020 cut-off events. [2023-11-23 22:24:25,187 INFO L125 PetriNetUnfolderBase]: For 50080/50084 co-relation queries the response was YES. [2023-11-23 22:24:25,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100840 conditions, 26020 events. 21673/26020 cut-off events. For 50080/50084 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 104683 event pairs, 797 based on Foata normal form. 909/26859 useless extension candidates. Maximal degree in co-relation 73780. Up to 18795 conditions per place. [2023-11-23 22:24:25,371 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 110 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-11-23 22:24:25,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 121 transitions, 812 flow [2023-11-23 22:24:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:24:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:24:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2023-11-23 22:24:25,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2023-11-23 22:24:25,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 131 transitions. [2023-11-23 22:24:25,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 131 transitions. [2023-11-23 22:24:25,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:24:25,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 131 transitions. [2023-11-23 22:24:25,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:25,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:25,381 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:25,381 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 273 flow. Second operand 4 states and 131 transitions. [2023-11-23 22:24:25,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 121 transitions, 812 flow [2023-11-23 22:24:25,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 121 transitions, 799 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-23 22:24:25,639 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 286 flow [2023-11-23 22:24:25,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-11-23 22:24:25,640 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2023-11-23 22:24:25,640 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 286 flow [2023-11-23 22:24:25,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:25,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:24:25,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:25,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:24:25,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd800125-2001-43aa-b55a-261f7b760b73/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:24:25,862 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 4 more)] === [2023-11-23 22:24:25,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:25,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1743945699, now seen corresponding path program 1 times [2023-11-23 22:24:25,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:25,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355437756] [2023-11-23 22:24:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:25,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:24:26,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:26,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355437756] [2023-11-23 22:24:26,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355437756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:26,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:26,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:24:26,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037736574] [2023-11-23 22:24:26,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:26,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:24:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:24:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:24:26,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-23 22:24:26,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:26,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:24:26,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-23 22:24:26,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand