./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:02:00,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:02:00,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:02:00,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:02:00,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:02:00,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:02:00,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:02:00,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:02:00,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:02:00,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:02:00,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:02:00,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:02:00,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:02:00,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:02:00,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:02:00,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:02:00,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:02:00,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:02:00,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:02:00,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:02:00,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:02:00,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:02:00,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:02:00,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:02:00,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:02:00,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:02:00,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:02:00,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:02:00,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:02:00,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:02:00,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:02:00,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:02:00,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:02:00,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:02:00,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:02:00,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:02:00,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:02:00,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:02:00,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:02:00,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:02:00,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:02:00,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:02:00,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:02:00,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:02:00,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:02:00,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:02:00,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:02:00,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:02:00,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:02:00,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:02:00,943 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:02:00,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:02:00,944 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:02:00,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:02:00,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:02:00,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:02:00,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:02:00,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:02:00,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:02:00,946 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:02:00,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:02:00,946 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:02:00,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:02:00,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:02:00,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:02:00,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:02:00,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:02:00,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:02:00,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:02:00,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:02:00,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:02:00,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:02:00,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:02:00,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:02:00,950 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:02:00,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:02:00,950 INFO L138 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_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-11-25 18:02:01,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:02:01,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:02:01,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:02:01,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:02:01,269 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:02:01,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-25 18:02:04,223 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:02:04,469 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:02:04,469 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-25 18:02:04,476 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/data/e4228f0d6/6c91cd0c90c9456395c0ea89d9a86e7b/FLAG5e95a3112 [2022-11-25 18:02:04,491 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/data/e4228f0d6/6c91cd0c90c9456395c0ea89d9a86e7b [2022-11-25 18:02:04,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:02:04,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:02:04,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:02:04,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:02:04,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:02:04,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a59272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04, skipping insertion in model container [2022-11-25 18:02:04,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:02:04,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:02:04,682 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:02:04,683 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:02:04,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:02:04,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:02:04,692 WARN L237 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_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-25 18:02:04,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:02:04,707 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:02:04,721 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:02:04,721 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:02:04,723 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:02:04,724 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:02:04,728 WARN L237 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_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-25 18:02:04,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:02:04,744 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:02:04,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04 WrapperNode [2022-11-25 18:02:04,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:02:04,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:02:04,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:02:04,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:02:04,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,778 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-25 18:02:04,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:02:04,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:02:04,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:02:04,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:02:04,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,801 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:02:04,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:02:04,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:02:04,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:02:04,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (1/1) ... [2022-11-25 18:02:04,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:02:04,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:04,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:02:04,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:02:04,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:02:04,896 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:02:04,896 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:02:04,896 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:02:04,896 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:02:04,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:02:04,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:02:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:02:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:02:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:02:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:02:04,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:02:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:02:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:02:04,900 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:02:05,027 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:02:05,030 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:02:05,267 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:02:05,292 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:02:05,292 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:02:05,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:05 BoogieIcfgContainer [2022-11-25 18:02:05,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:02:05,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:02:05,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:02:05,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:02:05,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:02:04" (1/3) ... [2022-11-25 18:02:05,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbbabf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:05, skipping insertion in model container [2022-11-25 18:02:05,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:04" (2/3) ... [2022-11-25 18:02:05,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbbabf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:05, skipping insertion in model container [2022-11-25 18:02:05,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:05" (3/3) ... [2022-11-25 18:02:05,303 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-11-25 18:02:05,321 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:02:05,332 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:02:05,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:02:05,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:02:05,437 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:02:05,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-11-25 18:02:05,589 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-11-25 18:02:05,589 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:02:05,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-11-25 18:02:05,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-11-25 18:02:05,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-11-25 18:02:05,603 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:02:05,635 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 164 flow [2022-11-25 18:02:05,638 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 164 flow [2022-11-25 18:02:05,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 164 flow [2022-11-25 18:02:05,688 INFO L130 PetriNetUnfolder]: 6/76 cut-off events. [2022-11-25 18:02:05,688 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:02:05,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 6/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-11-25 18:02:05,691 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2022-11-25 18:02:08,423 INFO L134 LiptonReduction]: Checked pairs total: 560 [2022-11-25 18:02:08,423 INFO L136 LiptonReduction]: Total number of compositions: 71 [2022-11-25 18:02:08,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:02:08,445 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33418bfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:02:08,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 18:02:08,451 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-11-25 18:02:08,451 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:02:08,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:08,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:08,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:08,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1178601689, now seen corresponding path program 1 times [2022-11-25 18:02:08,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:08,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847325585] [2022-11-25 18:02:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:08,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:09,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:09,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847325585] [2022-11-25 18:02:09,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847325585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:09,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:09,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:09,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545530751] [2022-11-25 18:02:09,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:09,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:02:09,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:02:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:02:09,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 158 [2022-11-25 18:02:09,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:09,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:09,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 158 [2022-11-25 18:02:09,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:09,579 INFO L130 PetriNetUnfolder]: 42/82 cut-off events. [2022-11-25 18:02:09,579 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:02:09,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 82 events. 42/82 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 170 event pairs, 7 based on Foata normal form. 1/65 useless extension candidates. Maximal degree in co-relation 132. Up to 34 conditions per place. [2022-11-25 18:02:09,581 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 23 selfloop transitions, 8 changer transitions 5/36 dead transitions. [2022-11-25 18:02:09,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 165 flow [2022-11-25 18:02:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 492 transitions. [2022-11-25 18:02:09,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4448462929475588 [2022-11-25 18:02:09,610 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 492 transitions. [2022-11-25 18:02:09,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 492 transitions. [2022-11-25 18:02:09,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:09,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 492 transitions. [2022-11-25 18:02:09,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.28571428571429) internal successors, (492), 7 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:09,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:09,631 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:09,633 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 492 transitions. [2022-11-25 18:02:09,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 165 flow [2022-11-25 18:02:09,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 36 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:09,638 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 84 flow [2022-11-25 18:02:09,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=84, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2022-11-25 18:02:09,644 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2022-11-25 18:02:09,644 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 84 flow [2022-11-25 18:02:09,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:09,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:09,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:09,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:02:09,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:09,646 INFO L85 PathProgramCache]: Analyzing trace with hash -12293259, now seen corresponding path program 2 times [2022-11-25 18:02:09,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:09,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011415149] [2022-11-25 18:02:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:09,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:09,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011415149] [2022-11-25 18:02:09,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011415149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:09,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:09,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352395506] [2022-11-25 18:02:09,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:09,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:02:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:02:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:02:09,972 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 158 [2022-11-25 18:02:09,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 84 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:09,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:09,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 158 [2022-11-25 18:02:09,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:10,135 INFO L130 PetriNetUnfolder]: 47/91 cut-off events. [2022-11-25 18:02:10,135 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 18:02:10,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 91 events. 47/91 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 213 event pairs, 1 based on Foata normal form. 1/92 useless extension candidates. Maximal degree in co-relation 251. Up to 25 conditions per place. [2022-11-25 18:02:10,136 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 30 selfloop transitions, 9 changer transitions 5/44 dead transitions. [2022-11-25 18:02:10,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 44 transitions, 236 flow [2022-11-25 18:02:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 498 transitions. [2022-11-25 18:02:10,139 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45027124773960214 [2022-11-25 18:02:10,139 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 498 transitions. [2022-11-25 18:02:10,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 498 transitions. [2022-11-25 18:02:10,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:10,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 498 transitions. [2022-11-25 18:02:10,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.14285714285714) internal successors, (498), 7 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,144 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,144 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 84 flow. Second operand 7 states and 498 transitions. [2022-11-25 18:02:10,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 44 transitions, 236 flow [2022-11-25 18:02:10,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 228 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:10,147 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 108 flow [2022-11-25 18:02:10,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=108, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2022-11-25 18:02:10,148 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2022-11-25 18:02:10,148 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 108 flow [2022-11-25 18:02:10,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:10,149 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:10,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:02:10,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1521683901, now seen corresponding path program 3 times [2022-11-25 18:02:10,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:10,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521907422] [2022-11-25 18:02:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:10,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:10,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:10,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521907422] [2022-11-25 18:02:10,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521907422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:10,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:10,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:10,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369913470] [2022-11-25 18:02:10,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:10,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:02:10,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:02:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:02:10,527 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 158 [2022-11-25 18:02:10,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:10,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 158 [2022-11-25 18:02:10,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:10,693 INFO L130 PetriNetUnfolder]: 53/101 cut-off events. [2022-11-25 18:02:10,694 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-11-25 18:02:10,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 101 events. 53/101 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 235 event pairs, 7 based on Foata normal form. 1/102 useless extension candidates. Maximal degree in co-relation 316. Up to 58 conditions per place. [2022-11-25 18:02:10,695 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 26 selfloop transitions, 12 changer transitions 5/43 dead transitions. [2022-11-25 18:02:10,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 265 flow [2022-11-25 18:02:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2022-11-25 18:02:10,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4484629294755877 [2022-11-25 18:02:10,698 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2022-11-25 18:02:10,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2022-11-25 18:02:10,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:10,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2022-11-25 18:02:10,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,703 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,703 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 108 flow. Second operand 7 states and 496 transitions. [2022-11-25 18:02:10,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 265 flow [2022-11-25 18:02:10,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 43 transitions, 232 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-25 18:02:10,706 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 158 flow [2022-11-25 18:02:10,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=158, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2022-11-25 18:02:10,707 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2022-11-25 18:02:10,707 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 158 flow [2022-11-25 18:02:10,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:10,708 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:10,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:02:10,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1782130751, now seen corresponding path program 4 times [2022-11-25 18:02:10,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:10,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071700600] [2022-11-25 18:02:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:10,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:10,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:10,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071700600] [2022-11-25 18:02:10,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071700600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:10,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:10,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851646656] [2022-11-25 18:02:10,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:10,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:02:10,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:10,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:02:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:02:10,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 158 [2022-11-25 18:02:10,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:10,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:10,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 158 [2022-11-25 18:02:10,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:11,131 INFO L130 PetriNetUnfolder]: 65/119 cut-off events. [2022-11-25 18:02:11,131 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-25 18:02:11,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 119 events. 65/119 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 302 event pairs, 3 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 405. Up to 67 conditions per place. [2022-11-25 18:02:11,133 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 33 selfloop transitions, 15 changer transitions 5/53 dead transitions. [2022-11-25 18:02:11,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 53 transitions, 363 flow [2022-11-25 18:02:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 500 transitions. [2022-11-25 18:02:11,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45207956600361665 [2022-11-25 18:02:11,141 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 500 transitions. [2022-11-25 18:02:11,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 500 transitions. [2022-11-25 18:02:11,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:11,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 500 transitions. [2022-11-25 18:02:11,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.42857142857143) internal successors, (500), 7 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,156 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,156 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 158 flow. Second operand 7 states and 500 transitions. [2022-11-25 18:02:11,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 53 transitions, 363 flow [2022-11-25 18:02:11,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 327 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:11,160 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 224 flow [2022-11-25 18:02:11,160 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2022-11-25 18:02:11,161 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2022-11-25 18:02:11,161 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 224 flow [2022-11-25 18:02:11,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,161 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:11,161 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:11,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:02:11,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash 129876219, now seen corresponding path program 5 times [2022-11-25 18:02:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:11,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86555853] [2022-11-25 18:02:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:11,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:11,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:11,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86555853] [2022-11-25 18:02:11,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86555853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:11,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:11,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186226097] [2022-11-25 18:02:11,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:11,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:02:11,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:02:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:02:11,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 158 [2022-11-25 18:02:11,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:11,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 158 [2022-11-25 18:02:11,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:11,611 INFO L130 PetriNetUnfolder]: 64/120 cut-off events. [2022-11-25 18:02:11,612 INFO L131 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2022-11-25 18:02:11,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 120 events. 64/120 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 302 event pairs, 5 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 473. Up to 72 conditions per place. [2022-11-25 18:02:11,613 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 32 selfloop transitions, 15 changer transitions 5/52 dead transitions. [2022-11-25 18:02:11,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 401 flow [2022-11-25 18:02:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 498 transitions. [2022-11-25 18:02:11,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45027124773960214 [2022-11-25 18:02:11,616 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 498 transitions. [2022-11-25 18:02:11,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 498 transitions. [2022-11-25 18:02:11,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:11,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 498 transitions. [2022-11-25 18:02:11,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.14285714285714) internal successors, (498), 7 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,621 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,621 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 224 flow. Second operand 7 states and 498 transitions. [2022-11-25 18:02:11,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 401 flow [2022-11-25 18:02:11,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 357 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:11,626 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 228 flow [2022-11-25 18:02:11,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2022-11-25 18:02:11,627 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2022-11-25 18:02:11,627 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 228 flow [2022-11-25 18:02:11,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:11,628 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:11,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:02:11,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:11,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1784853145, now seen corresponding path program 6 times [2022-11-25 18:02:11,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:11,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774056966] [2022-11-25 18:02:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:11,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:11,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774056966] [2022-11-25 18:02:11,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774056966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:11,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:11,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:11,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625573993] [2022-11-25 18:02:11,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:11,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:02:11,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:11,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:02:11,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:02:11,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:11,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 67.85714285714286) internal successors, (475), 7 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:11,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:11,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:11,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:12,016 INFO L130 PetriNetUnfolder]: 69/129 cut-off events. [2022-11-25 18:02:12,016 INFO L131 PetriNetUnfolder]: For 334/334 co-relation queries the response was YES. [2022-11-25 18:02:12,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 129 events. 69/129 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 335 event pairs, 9 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 501. Up to 77 conditions per place. [2022-11-25 18:02:12,018 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 33 selfloop transitions, 15 changer transitions 5/53 dead transitions. [2022-11-25 18:02:12,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 411 flow [2022-11-25 18:02:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 505 transitions. [2022-11-25 18:02:12,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4566003616636528 [2022-11-25 18:02:12,021 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 505 transitions. [2022-11-25 18:02:12,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 505 transitions. [2022-11-25 18:02:12,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:12,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 505 transitions. [2022-11-25 18:02:12,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,026 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,026 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 228 flow. Second operand 7 states and 505 transitions. [2022-11-25 18:02:12,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 411 flow [2022-11-25 18:02:12,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 371 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-25 18:02:12,030 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 236 flow [2022-11-25 18:02:12,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2022-11-25 18:02:12,031 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2022-11-25 18:02:12,031 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 236 flow [2022-11-25 18:02:12,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.85714285714286) internal successors, (475), 7 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:12,032 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:12,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:02:12,032 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:12,033 INFO L85 PathProgramCache]: Analyzing trace with hash -382890785, now seen corresponding path program 1 times [2022-11-25 18:02:12,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:12,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397798569] [2022-11-25 18:02:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:12,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:12,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397798569] [2022-11-25 18:02:12,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397798569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:12,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:12,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:12,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801781171] [2022-11-25 18:02:12,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:12,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:12,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:12,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:12,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:02:12,132 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:12,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 236 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:12,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:12,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:12,262 INFO L130 PetriNetUnfolder]: 104/195 cut-off events. [2022-11-25 18:02:12,263 INFO L131 PetriNetUnfolder]: For 605/605 co-relation queries the response was YES. [2022-11-25 18:02:12,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 195 events. 104/195 cut-off events. For 605/605 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 626 event pairs, 16 based on Foata normal form. 4/193 useless extension candidates. Maximal degree in co-relation 783. Up to 78 conditions per place. [2022-11-25 18:02:12,265 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 46 selfloop transitions, 22 changer transitions 4/72 dead transitions. [2022-11-25 18:02:12,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 572 flow [2022-11-25 18:02:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 508 transitions. [2022-11-25 18:02:12,267 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4593128390596745 [2022-11-25 18:02:12,268 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 508 transitions. [2022-11-25 18:02:12,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 508 transitions. [2022-11-25 18:02:12,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:12,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 508 transitions. [2022-11-25 18:02:12,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.57142857142857) internal successors, (508), 7 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,272 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,272 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 236 flow. Second operand 7 states and 508 transitions. [2022-11-25 18:02:12,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 572 flow [2022-11-25 18:02:12,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 518 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-11-25 18:02:12,276 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 362 flow [2022-11-25 18:02:12,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=362, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2022-11-25 18:02:12,277 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2022-11-25 18:02:12,278 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 362 flow [2022-11-25 18:02:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:12,278 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:12,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:02:12,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash -77435575, now seen corresponding path program 1 times [2022-11-25 18:02:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:12,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383925805] [2022-11-25 18:02:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:12,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:12,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383925805] [2022-11-25 18:02:12,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383925805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:12,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:12,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:12,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591747994] [2022-11-25 18:02:12,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:12,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:12,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:12,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:12,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:02:12,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:12,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:12,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:12,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:12,491 INFO L130 PetriNetUnfolder]: 114/219 cut-off events. [2022-11-25 18:02:12,491 INFO L131 PetriNetUnfolder]: For 945/945 co-relation queries the response was YES. [2022-11-25 18:02:12,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 219 events. 114/219 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 735 event pairs, 10 based on Foata normal form. 6/225 useless extension candidates. Maximal degree in co-relation 897. Up to 86 conditions per place. [2022-11-25 18:02:12,494 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 46 selfloop transitions, 19 changer transitions 2/67 dead transitions. [2022-11-25 18:02:12,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 626 flow [2022-11-25 18:02:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:02:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:02:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 437 transitions. [2022-11-25 18:02:12,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4609704641350211 [2022-11-25 18:02:12,497 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 437 transitions. [2022-11-25 18:02:12,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 437 transitions. [2022-11-25 18:02:12,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:12,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 437 transitions. [2022-11-25 18:02:12,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,501 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,501 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 362 flow. Second operand 6 states and 437 transitions. [2022-11-25 18:02:12,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 626 flow [2022-11-25 18:02:12,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 600 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:12,507 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 439 flow [2022-11-25 18:02:12,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=439, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2022-11-25 18:02:12,508 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 37 predicate places. [2022-11-25 18:02:12,508 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 439 flow [2022-11-25 18:02:12,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:12,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:12,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:02:12,509 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:12,510 INFO L85 PathProgramCache]: Analyzing trace with hash 762075979, now seen corresponding path program 2 times [2022-11-25 18:02:12,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:12,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245667397] [2022-11-25 18:02:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:12,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:12,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:12,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245667397] [2022-11-25 18:02:12,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245667397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:12,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787670514] [2022-11-25 18:02:12,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:12,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:12,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:12,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:12,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:02:12,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:12,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:12,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:02:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:12,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:12,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787670514] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:12,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:12,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-11-25 18:02:12,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416373676] [2022-11-25 18:02:12,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:12,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:02:12,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:12,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 439 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:12,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:12,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:12,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:13,023 INFO L130 PetriNetUnfolder]: 115/222 cut-off events. [2022-11-25 18:02:13,026 INFO L131 PetriNetUnfolder]: For 1426/1426 co-relation queries the response was YES. [2022-11-25 18:02:13,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 222 events. 115/222 cut-off events. For 1426/1426 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 743 event pairs, 6 based on Foata normal form. 6/228 useless extension candidates. Maximal degree in co-relation 963. Up to 125 conditions per place. [2022-11-25 18:02:13,031 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 44 selfloop transitions, 21 changer transitions 0/65 dead transitions. [2022-11-25 18:02:13,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 653 flow [2022-11-25 18:02:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 370 transitions. [2022-11-25 18:02:13,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46835443037974683 [2022-11-25 18:02:13,034 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 370 transitions. [2022-11-25 18:02:13,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 370 transitions. [2022-11-25 18:02:13,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:13,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 370 transitions. [2022-11-25 18:02:13,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,039 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,039 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 439 flow. Second operand 5 states and 370 transitions. [2022-11-25 18:02:13,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 653 flow [2022-11-25 18:02:13,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 593 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:13,048 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 480 flow [2022-11-25 18:02:13,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2022-11-25 18:02:13,050 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2022-11-25 18:02:13,051 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 480 flow [2022-11-25 18:02:13,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:13,051 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:13,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 18:02:13,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 18:02:13,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash -874765743, now seen corresponding path program 2 times [2022-11-25 18:02:13,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:13,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211579412] [2022-11-25 18:02:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:13,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:13,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:13,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211579412] [2022-11-25 18:02:13,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211579412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:13,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:13,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:13,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482743814] [2022-11-25 18:02:13,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:13,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:02:13,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:13,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 480 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:13,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:13,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:13,560 INFO L130 PetriNetUnfolder]: 125/254 cut-off events. [2022-11-25 18:02:13,560 INFO L131 PetriNetUnfolder]: For 1723/1723 co-relation queries the response was YES. [2022-11-25 18:02:13,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1328 conditions, 254 events. 125/254 cut-off events. For 1723/1723 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 953 event pairs, 20 based on Foata normal form. 8/262 useless extension candidates. Maximal degree in co-relation 1264. Up to 108 conditions per place. [2022-11-25 18:02:13,564 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 65 selfloop transitions, 21 changer transitions 1/87 dead transitions. [2022-11-25 18:02:13,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 887 flow [2022-11-25 18:02:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:02:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:02:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 587 transitions. [2022-11-25 18:02:13,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46439873417721517 [2022-11-25 18:02:13,567 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 587 transitions. [2022-11-25 18:02:13,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 587 transitions. [2022-11-25 18:02:13,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:13,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 587 transitions. [2022-11-25 18:02:13,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.375) internal successors, (587), 8 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,572 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,572 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 480 flow. Second operand 8 states and 587 transitions. [2022-11-25 18:02:13,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 887 flow [2022-11-25 18:02:13,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 874 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:13,582 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 604 flow [2022-11-25 18:02:13,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=604, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2022-11-25 18:02:13,584 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2022-11-25 18:02:13,584 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 604 flow [2022-11-25 18:02:13,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:13,584 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:13,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:02:13,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:13,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2024217843, now seen corresponding path program 3 times [2022-11-25 18:02:13,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:13,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515637070] [2022-11-25 18:02:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:13,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:13,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:13,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515637070] [2022-11-25 18:02:13,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515637070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:13,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842923348] [2022-11-25 18:02:13,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:02:13,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:13,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:13,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:13,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:02:13,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:02:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:02:13,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:13,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:13,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842923348] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:13,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:13,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-11-25 18:02:13,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163311934] [2022-11-25 18:02:13,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:13,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:13,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:02:13,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:13,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 604 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:13,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:13,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:13,976 INFO L130 PetriNetUnfolder]: 118/233 cut-off events. [2022-11-25 18:02:13,977 INFO L131 PetriNetUnfolder]: For 1864/1864 co-relation queries the response was YES. [2022-11-25 18:02:13,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 233 events. 118/233 cut-off events. For 1864/1864 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 809 event pairs, 22 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 1234. Up to 128 conditions per place. [2022-11-25 18:02:13,980 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 54 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2022-11-25 18:02:13,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 834 flow [2022-11-25 18:02:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:02:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:02:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 442 transitions. [2022-11-25 18:02:13,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46624472573839665 [2022-11-25 18:02:13,982 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 442 transitions. [2022-11-25 18:02:13,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 442 transitions. [2022-11-25 18:02:13,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:13,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 442 transitions. [2022-11-25 18:02:13,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,987 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:13,987 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 604 flow. Second operand 6 states and 442 transitions. [2022-11-25 18:02:13,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 834 flow [2022-11-25 18:02:13,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 74 transitions, 799 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:13,999 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 605 flow [2022-11-25 18:02:13,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=605, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2022-11-25 18:02:14,000 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 53 predicate places. [2022-11-25 18:02:14,000 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 605 flow [2022-11-25 18:02:14,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:14,001 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:14,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 18:02:14,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:02:14,207 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:14,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:14,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1869068961, now seen corresponding path program 3 times [2022-11-25 18:02:14,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:14,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144252444] [2022-11-25 18:02:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:14,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:14,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144252444] [2022-11-25 18:02:14,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144252444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:14,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:14,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:14,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117307912] [2022-11-25 18:02:14,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:14,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:14,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:14,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:02:14,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:14,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 605 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:14,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:14,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:14,460 INFO L130 PetriNetUnfolder]: 152/303 cut-off events. [2022-11-25 18:02:14,460 INFO L131 PetriNetUnfolder]: For 2414/2414 co-relation queries the response was YES. [2022-11-25 18:02:14,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 303 events. 152/303 cut-off events. For 2414/2414 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1183 event pairs, 26 based on Foata normal form. 2/305 useless extension candidates. Maximal degree in co-relation 1656. Up to 120 conditions per place. [2022-11-25 18:02:14,464 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 54 selfloop transitions, 29 changer transitions 2/85 dead transitions. [2022-11-25 18:02:14,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 85 transitions, 1056 flow [2022-11-25 18:02:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 504 transitions. [2022-11-25 18:02:14,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45569620253164556 [2022-11-25 18:02:14,466 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 504 transitions. [2022-11-25 18:02:14,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 504 transitions. [2022-11-25 18:02:14,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:14,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 504 transitions. [2022-11-25 18:02:14,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.0) internal successors, (504), 7 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,470 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,470 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 605 flow. Second operand 7 states and 504 transitions. [2022-11-25 18:02:14,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 85 transitions, 1056 flow [2022-11-25 18:02:14,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 85 transitions, 1006 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:14,484 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 814 flow [2022-11-25 18:02:14,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2022-11-25 18:02:14,488 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2022-11-25 18:02:14,488 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 814 flow [2022-11-25 18:02:14,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:14,489 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:14,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:02:14,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:14,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1696490789, now seen corresponding path program 4 times [2022-11-25 18:02:14,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:14,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759480250] [2022-11-25 18:02:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:14,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:14,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759480250] [2022-11-25 18:02:14,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759480250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:14,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:14,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:14,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145483724] [2022-11-25 18:02:14,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:14,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:14,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:14,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:14,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:02:14,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:14,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 64 transitions, 814 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:14,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:14,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:14,745 INFO L130 PetriNetUnfolder]: 140/277 cut-off events. [2022-11-25 18:02:14,745 INFO L131 PetriNetUnfolder]: For 2566/2566 co-relation queries the response was YES. [2022-11-25 18:02:14,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 277 events. 140/277 cut-off events. For 2566/2566 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1042 event pairs, 10 based on Foata normal form. 4/281 useless extension candidates. Maximal degree in co-relation 1588. Up to 183 conditions per place. [2022-11-25 18:02:14,749 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 60 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2022-11-25 18:02:14,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 76 transitions, 993 flow [2022-11-25 18:02:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 367 transitions. [2022-11-25 18:02:14,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46455696202531643 [2022-11-25 18:02:14,752 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 367 transitions. [2022-11-25 18:02:14,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 367 transitions. [2022-11-25 18:02:14,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:14,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 367 transitions. [2022-11-25 18:02:14,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,755 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,756 INFO L175 Difference]: Start difference. First operand has 79 places, 64 transitions, 814 flow. Second operand 5 states and 367 transitions. [2022-11-25 18:02:14,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 76 transitions, 993 flow [2022-11-25 18:02:14,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 959 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:14,774 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 789 flow [2022-11-25 18:02:14,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=789, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2022-11-25 18:02:14,775 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2022-11-25 18:02:14,776 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 789 flow [2022-11-25 18:02:14,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:14,776 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:14,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:02:14,777 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash -528270359, now seen corresponding path program 5 times [2022-11-25 18:02:14,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:14,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805460378] [2022-11-25 18:02:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:14,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:14,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805460378] [2022-11-25 18:02:14,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805460378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:14,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:14,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840515030] [2022-11-25 18:02:14,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:14,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:14,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:02:14,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:14,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 789 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:14,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:14,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:15,036 INFO L130 PetriNetUnfolder]: 126/253 cut-off events. [2022-11-25 18:02:15,036 INFO L131 PetriNetUnfolder]: For 2247/2247 co-relation queries the response was YES. [2022-11-25 18:02:15,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1548 conditions, 253 events. 126/253 cut-off events. For 2247/2247 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 925 event pairs, 8 based on Foata normal form. 8/261 useless extension candidates. Maximal degree in co-relation 1390. Up to 106 conditions per place. [2022-11-25 18:02:15,039 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 55 selfloop transitions, 20 changer transitions 2/77 dead transitions. [2022-11-25 18:02:15,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 1000 flow [2022-11-25 18:02:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:02:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:02:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 436 transitions. [2022-11-25 18:02:15,042 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.459915611814346 [2022-11-25 18:02:15,042 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 436 transitions. [2022-11-25 18:02:15,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 436 transitions. [2022-11-25 18:02:15,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:15,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 436 transitions. [2022-11-25 18:02:15,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.66666666666667) internal successors, (436), 6 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,047 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,047 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 789 flow. Second operand 6 states and 436 transitions. [2022-11-25 18:02:15,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 1000 flow [2022-11-25 18:02:15,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 968 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:15,068 INFO L231 Difference]: Finished difference. Result has 80 places, 58 transitions, 712 flow [2022-11-25 18:02:15,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=712, PETRI_PLACES=80, PETRI_TRANSITIONS=58} [2022-11-25 18:02:15,069 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2022-11-25 18:02:15,069 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 58 transitions, 712 flow [2022-11-25 18:02:15,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:15,069 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:15,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 18:02:15,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1127339693, now seen corresponding path program 4 times [2022-11-25 18:02:15,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:15,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95468576] [2022-11-25 18:02:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:15,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:15,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95468576] [2022-11-25 18:02:15,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95468576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:15,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:15,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:15,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563188518] [2022-11-25 18:02:15,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:15,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:15,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:15,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:15,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:02:15,170 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:15,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 58 transitions, 712 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:15,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:15,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:15,307 INFO L130 PetriNetUnfolder]: 116/227 cut-off events. [2022-11-25 18:02:15,307 INFO L131 PetriNetUnfolder]: For 2292/2292 co-relation queries the response was YES. [2022-11-25 18:02:15,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 227 events. 116/227 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 773 event pairs, 29 based on Foata normal form. 6/233 useless extension candidates. Maximal degree in co-relation 1122. Up to 163 conditions per place. [2022-11-25 18:02:15,310 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 53 selfloop transitions, 18 changer transitions 0/71 dead transitions. [2022-11-25 18:02:15,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 915 flow [2022-11-25 18:02:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:02:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:02:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 365 transitions. [2022-11-25 18:02:15,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4620253164556962 [2022-11-25 18:02:15,312 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 365 transitions. [2022-11-25 18:02:15,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 365 transitions. [2022-11-25 18:02:15,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:15,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 365 transitions. [2022-11-25 18:02:15,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,315 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,315 INFO L175 Difference]: Start difference. First operand has 80 places, 58 transitions, 712 flow. Second operand 5 states and 365 transitions. [2022-11-25 18:02:15,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 915 flow [2022-11-25 18:02:15,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 867 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-25 18:02:15,330 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 739 flow [2022-11-25 18:02:15,330 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=739, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2022-11-25 18:02:15,330 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2022-11-25 18:02:15,331 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 739 flow [2022-11-25 18:02:15,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:15,331 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:15,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 18:02:15,331 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash 269059809, now seen corresponding path program 5 times [2022-11-25 18:02:15,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:15,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913463335] [2022-11-25 18:02:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:15,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:15,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913463335] [2022-11-25 18:02:15,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913463335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:15,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:15,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:02:15,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219194609] [2022-11-25 18:02:15,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:15,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:15,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:15,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:15,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:02:15,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-11-25 18:02:15,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 739 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:15,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-11-25 18:02:15,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:15,588 INFO L130 PetriNetUnfolder]: 112/215 cut-off events. [2022-11-25 18:02:15,588 INFO L131 PetriNetUnfolder]: For 2004/2004 co-relation queries the response was YES. [2022-11-25 18:02:15,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 215 events. 112/215 cut-off events. For 2004/2004 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 707 event pairs, 18 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 1106. Up to 92 conditions per place. [2022-11-25 18:02:15,591 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 53 selfloop transitions, 23 changer transitions 1/77 dead transitions. [2022-11-25 18:02:15,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 957 flow [2022-11-25 18:02:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:02:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:02:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 575 transitions. [2022-11-25 18:02:15,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4549050632911392 [2022-11-25 18:02:15,594 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 575 transitions. [2022-11-25 18:02:15,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 575 transitions. [2022-11-25 18:02:15,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:15,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 575 transitions. [2022-11-25 18:02:15,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.875) internal successors, (575), 8 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,598 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,598 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 739 flow. Second operand 8 states and 575 transitions. [2022-11-25 18:02:15,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 957 flow [2022-11-25 18:02:15,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 77 transitions, 936 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:15,609 INFO L231 Difference]: Finished difference. Result has 84 places, 57 transitions, 721 flow [2022-11-25 18:02:15,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=721, PETRI_PLACES=84, PETRI_TRANSITIONS=57} [2022-11-25 18:02:15,610 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2022-11-25 18:02:15,610 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 57 transitions, 721 flow [2022-11-25 18:02:15,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:15,610 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:15,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 18:02:15,610 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1027492469, now seen corresponding path program 1 times [2022-11-25 18:02:15,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:15,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368564577] [2022-11-25 18:02:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:15,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:15,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:15,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368564577] [2022-11-25 18:02:15,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368564577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:15,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563656203] [2022-11-25 18:02:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:15,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:15,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:15,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:02:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:02:15,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:16,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:16,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563656203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:16,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:16,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-25 18:02:16,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938191593] [2022-11-25 18:02:16,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:16,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:02:16,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:16,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:02:16,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:02:16,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2022-11-25 18:02:16,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 57 transitions, 721 flow. Second operand has 18 states, 18 states have (on average 64.83333333333333) internal successors, (1167), 18 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:16,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:16,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2022-11-25 18:02:16,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:17,047 INFO L130 PetriNetUnfolder]: 116/218 cut-off events. [2022-11-25 18:02:17,047 INFO L131 PetriNetUnfolder]: For 2022/2022 co-relation queries the response was YES. [2022-11-25 18:02:17,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1424 conditions, 218 events. 116/218 cut-off events. For 2022/2022 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 709 event pairs, 2 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 1154. Up to 53 conditions per place. [2022-11-25 18:02:17,050 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 41 selfloop transitions, 21 changer transitions 26/88 dead transitions. [2022-11-25 18:02:17,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 88 transitions, 1075 flow [2022-11-25 18:02:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:02:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:02:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 752 transitions. [2022-11-25 18:02:17,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326812428078251 [2022-11-25 18:02:17,053 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 752 transitions. [2022-11-25 18:02:17,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 752 transitions. [2022-11-25 18:02:17,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:17,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 752 transitions. [2022-11-25 18:02:17,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 68.36363636363636) internal successors, (752), 11 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:17,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:17,057 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:17,057 INFO L175 Difference]: Start difference. First operand has 84 places, 57 transitions, 721 flow. Second operand 11 states and 752 transitions. [2022-11-25 18:02:17,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 88 transitions, 1075 flow [2022-11-25 18:02:17,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 88 transitions, 1005 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-25 18:02:17,067 INFO L231 Difference]: Finished difference. Result has 89 places, 46 transitions, 561 flow [2022-11-25 18:02:17,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=561, PETRI_PLACES=89, PETRI_TRANSITIONS=46} [2022-11-25 18:02:17,068 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2022-11-25 18:02:17,068 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 46 transitions, 561 flow [2022-11-25 18:02:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.83333333333333) internal successors, (1167), 18 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:17,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:17,069 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:17,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:17,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 18:02:17,275 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:17,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:17,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1156194509, now seen corresponding path program 2 times [2022-11-25 18:02:17,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:17,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319944604] [2022-11-25 18:02:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:17,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:17,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319944604] [2022-11-25 18:02:17,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319944604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364062600] [2022-11-25 18:02:17,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:17,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:17,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:17,446 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:17,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:02:17,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:17,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:17,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:02:17,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:17,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:17,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364062600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:17,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:17,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-25 18:02:17,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329326804] [2022-11-25 18:02:17,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:17,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:02:17,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:02:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:02:18,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2022-11-25 18:02:18,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 46 transitions, 561 flow. Second operand has 18 states, 18 states have (on average 64.66666666666667) internal successors, (1164), 18 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:18,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:18,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2022-11-25 18:02:18,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:18,642 INFO L130 PetriNetUnfolder]: 90/178 cut-off events. [2022-11-25 18:02:18,642 INFO L131 PetriNetUnfolder]: For 1574/1574 co-relation queries the response was YES. [2022-11-25 18:02:18,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 178 events. 90/178 cut-off events. For 1574/1574 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 541 event pairs, 2 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 1090. Up to 55 conditions per place. [2022-11-25 18:02:18,645 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 45 selfloop transitions, 26 changer transitions 9/80 dead transitions. [2022-11-25 18:02:18,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 80 transitions, 946 flow [2022-11-25 18:02:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:02:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:02:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 751 transitions. [2022-11-25 18:02:18,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43210586881472957 [2022-11-25 18:02:18,648 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 751 transitions. [2022-11-25 18:02:18,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 751 transitions. [2022-11-25 18:02:18,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:18,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 751 transitions. [2022-11-25 18:02:18,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 68.27272727272727) internal successors, (751), 11 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:18,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:18,653 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:18,654 INFO L175 Difference]: Start difference. First operand has 89 places, 46 transitions, 561 flow. Second operand 11 states and 751 transitions. [2022-11-25 18:02:18,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 80 transitions, 946 flow [2022-11-25 18:02:18,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 792 flow, removed 21 selfloop flow, removed 17 redundant places. [2022-11-25 18:02:18,662 INFO L231 Difference]: Finished difference. Result has 75 places, 49 transitions, 547 flow [2022-11-25 18:02:18,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=547, PETRI_PLACES=75, PETRI_TRANSITIONS=49} [2022-11-25 18:02:18,663 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2022-11-25 18:02:18,663 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 49 transitions, 547 flow [2022-11-25 18:02:18,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.66666666666667) internal successors, (1164), 18 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:18,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:18,664 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:18,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:02:18,870 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1136647769, now seen corresponding path program 3 times [2022-11-25 18:02:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:18,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047703068] [2022-11-25 18:02:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:18,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:19,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:19,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047703068] [2022-11-25 18:02:19,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047703068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:19,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416982778] [2022-11-25 18:02:19,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:02:19,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:19,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:19,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:19,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:02:19,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:02:19,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:02:19,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:19,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:19,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416982778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:19,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:19,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-25 18:02:19,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014665106] [2022-11-25 18:02:19,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:19,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:02:19,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:19,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:02:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:02:19,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2022-11-25 18:02:19,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 49 transitions, 547 flow. Second operand has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:19,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:19,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2022-11-25 18:02:19,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:20,201 INFO L130 PetriNetUnfolder]: 84/173 cut-off events. [2022-11-25 18:02:20,201 INFO L131 PetriNetUnfolder]: For 905/905 co-relation queries the response was YES. [2022-11-25 18:02:20,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 173 events. 84/173 cut-off events. For 905/905 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 527 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 972. Up to 55 conditions per place. [2022-11-25 18:02:20,202 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 33 selfloop transitions, 15 changer transitions 26/74 dead transitions. [2022-11-25 18:02:20,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 74 transitions, 820 flow [2022-11-25 18:02:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:02:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:02:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 745 transitions. [2022-11-25 18:02:20,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4286536248561565 [2022-11-25 18:02:20,205 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 745 transitions. [2022-11-25 18:02:20,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 745 transitions. [2022-11-25 18:02:20,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:20,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 745 transitions. [2022-11-25 18:02:20,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:20,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:20,211 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:20,211 INFO L175 Difference]: Start difference. First operand has 75 places, 49 transitions, 547 flow. Second operand 11 states and 745 transitions. [2022-11-25 18:02:20,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 74 transitions, 820 flow [2022-11-25 18:02:20,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 758 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-11-25 18:02:20,218 INFO L231 Difference]: Finished difference. Result has 76 places, 37 transitions, 374 flow [2022-11-25 18:02:20,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=374, PETRI_PLACES=76, PETRI_TRANSITIONS=37} [2022-11-25 18:02:20,218 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2022-11-25 18:02:20,218 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 37 transitions, 374 flow [2022-11-25 18:02:20,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:20,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:20,219 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:20,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:20,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:20,430 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1865125239, now seen corresponding path program 4 times [2022-11-25 18:02:20,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:20,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036495936] [2022-11-25 18:02:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:20,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:20,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036495936] [2022-11-25 18:02:20,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036495936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:20,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534501352] [2022-11-25 18:02:20,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:02:20,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:20,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:20,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:02:20,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:02:20,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:02:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:20,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:21,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534501352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:21,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:21,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 18:02:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578358935] [2022-11-25 18:02:21,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:21,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:02:21,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:02:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:02:21,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2022-11-25 18:02:21,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 37 transitions, 374 flow. Second operand has 15 states, 15 states have (on average 64.53333333333333) internal successors, (968), 15 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:21,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:21,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2022-11-25 18:02:21,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:21,761 INFO L130 PetriNetUnfolder]: 67/145 cut-off events. [2022-11-25 18:02:21,761 INFO L131 PetriNetUnfolder]: For 761/761 co-relation queries the response was YES. [2022-11-25 18:02:21,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 145 events. 67/145 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 431 event pairs, 1 based on Foata normal form. 1/146 useless extension candidates. Maximal degree in co-relation 777. Up to 35 conditions per place. [2022-11-25 18:02:21,763 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 32 selfloop transitions, 28 changer transitions 12/72 dead transitions. [2022-11-25 18:02:21,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 746 flow [2022-11-25 18:02:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:02:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 18:02:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1008 transitions. [2022-11-25 18:02:21,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4253164556962025 [2022-11-25 18:02:21,766 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1008 transitions. [2022-11-25 18:02:21,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1008 transitions. [2022-11-25 18:02:21,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:21,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1008 transitions. [2022-11-25 18:02:21,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 67.2) internal successors, (1008), 15 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:21,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:21,773 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:21,773 INFO L175 Difference]: Start difference. First operand has 76 places, 37 transitions, 374 flow. Second operand 15 states and 1008 transitions. [2022-11-25 18:02:21,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 746 flow [2022-11-25 18:02:21,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 665 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-11-25 18:02:21,779 INFO L231 Difference]: Finished difference. Result has 74 places, 43 transitions, 459 flow [2022-11-25 18:02:21,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=459, PETRI_PLACES=74, PETRI_TRANSITIONS=43} [2022-11-25 18:02:21,781 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2022-11-25 18:02:21,781 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 43 transitions, 459 flow [2022-11-25 18:02:21,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.53333333333333) internal successors, (968), 15 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:21,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:21,799 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:21,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 18:02:22,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:22,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:22,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1571562173, now seen corresponding path program 5 times [2022-11-25 18:02:22,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:22,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175734161] [2022-11-25 18:02:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:22,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:22,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:22,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175734161] [2022-11-25 18:02:22,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175734161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:22,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868814653] [2022-11-25 18:02:22,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:02:22,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:22,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:22,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:22,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:02:22,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:22,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:22,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:02:22,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:22,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:22,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868814653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:22,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:22,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-11-25 18:02:22,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163875885] [2022-11-25 18:02:22,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:22,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:02:22,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:22,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:02:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:02:22,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 158 [2022-11-25 18:02:22,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 43 transitions, 459 flow. Second operand has 15 states, 15 states have (on average 65.66666666666667) internal successors, (985), 15 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:22,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:22,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 158 [2022-11-25 18:02:22,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:22,981 INFO L130 PetriNetUnfolder]: 60/135 cut-off events. [2022-11-25 18:02:22,981 INFO L131 PetriNetUnfolder]: For 588/588 co-relation queries the response was YES. [2022-11-25 18:02:22,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 135 events. 60/135 cut-off events. For 588/588 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 394 event pairs, 1 based on Foata normal form. 2/137 useless extension candidates. Maximal degree in co-relation 745. Up to 46 conditions per place. [2022-11-25 18:02:22,983 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 35 selfloop transitions, 20 changer transitions 10/65 dead transitions. [2022-11-25 18:02:22,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 65 transitions, 695 flow [2022-11-25 18:02:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:02:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:02:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 821 transitions. [2022-11-25 18:02:22,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4330168776371308 [2022-11-25 18:02:22,986 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 821 transitions. [2022-11-25 18:02:22,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 821 transitions. [2022-11-25 18:02:22,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:22,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 821 transitions. [2022-11-25 18:02:22,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 68.41666666666667) internal successors, (821), 12 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:22,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 158.0) internal successors, (2054), 13 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:22,991 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 158.0) internal successors, (2054), 13 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:22,991 INFO L175 Difference]: Start difference. First operand has 74 places, 43 transitions, 459 flow. Second operand 12 states and 821 transitions. [2022-11-25 18:02:22,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 65 transitions, 695 flow [2022-11-25 18:02:22,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 612 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-11-25 18:02:22,997 INFO L231 Difference]: Finished difference. Result has 78 places, 39 transitions, 379 flow [2022-11-25 18:02:22,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=379, PETRI_PLACES=78, PETRI_TRANSITIONS=39} [2022-11-25 18:02:22,997 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2022-11-25 18:02:22,998 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 39 transitions, 379 flow [2022-11-25 18:02:22,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 65.66666666666667) internal successors, (985), 15 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:22,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:22,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:23,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:23,210 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:23,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1591108913, now seen corresponding path program 6 times [2022-11-25 18:02:23,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:23,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926663353] [2022-11-25 18:02:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:23,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:23,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:23,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926663353] [2022-11-25 18:02:23,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926663353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:23,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542428472] [2022-11-25 18:02:23,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:02:23,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:23,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:23,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:23,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:02:23,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:02:23,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:23,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:02:23,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:23,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:23,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542428472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:23,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:23,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-25 18:02:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199341088] [2022-11-25 18:02:23,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:02:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:02:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:02:24,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2022-11-25 18:02:24,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 39 transitions, 379 flow. Second operand has 16 states, 16 states have (on average 64.75) internal successors, (1036), 16 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:24,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:24,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2022-11-25 18:02:24,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:24,807 INFO L130 PetriNetUnfolder]: 64/149 cut-off events. [2022-11-25 18:02:24,808 INFO L131 PetriNetUnfolder]: For 602/602 co-relation queries the response was YES. [2022-11-25 18:02:24,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 149 events. 64/149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 481 event pairs, 3 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 817. Up to 33 conditions per place. [2022-11-25 18:02:24,810 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 31 selfloop transitions, 19 changer transitions 28/78 dead transitions. [2022-11-25 18:02:24,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 78 transitions, 746 flow [2022-11-25 18:02:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 18:02:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 18:02:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1141 transitions. [2022-11-25 18:02:24,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.424795234549516 [2022-11-25 18:02:24,813 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1141 transitions. [2022-11-25 18:02:24,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1141 transitions. [2022-11-25 18:02:24,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:24,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1141 transitions. [2022-11-25 18:02:24,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.11764705882354) internal successors, (1141), 17 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:24,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 158.0) internal successors, (2844), 18 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:24,820 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 158.0) internal successors, (2844), 18 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:24,820 INFO L175 Difference]: Start difference. First operand has 78 places, 39 transitions, 379 flow. Second operand 17 states and 1141 transitions. [2022-11-25 18:02:24,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 78 transitions, 746 flow [2022-11-25 18:02:24,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 78 transitions, 637 flow, removed 8 selfloop flow, removed 16 redundant places. [2022-11-25 18:02:24,825 INFO L231 Difference]: Finished difference. Result has 84 places, 38 transitions, 356 flow [2022-11-25 18:02:24,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=356, PETRI_PLACES=84, PETRI_TRANSITIONS=38} [2022-11-25 18:02:24,826 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2022-11-25 18:02:24,826 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 38 transitions, 356 flow [2022-11-25 18:02:24,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.75) internal successors, (1036), 16 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:24,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:24,827 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:24,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:25,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 18:02:25,038 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:25,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1311006117, now seen corresponding path program 7 times [2022-11-25 18:02:25,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:25,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758875296] [2022-11-25 18:02:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:25,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:25,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:25,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758875296] [2022-11-25 18:02:25,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758875296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814771606] [2022-11-25 18:02:25,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:02:25,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:25,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:25,208 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:25,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:02:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:02:25,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:25,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:25,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814771606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:25,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:25,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-25 18:02:25,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268606496] [2022-11-25 18:02:25,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:25,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:02:25,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:02:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:02:25,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2022-11-25 18:02:25,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 38 transitions, 356 flow. Second operand has 18 states, 18 states have (on average 64.5) internal successors, (1161), 18 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:25,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:25,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2022-11-25 18:02:25,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:26,321 INFO L130 PetriNetUnfolder]: 53/115 cut-off events. [2022-11-25 18:02:26,321 INFO L131 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2022-11-25 18:02:26,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 115 events. 53/115 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 307 event pairs, 3 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 617. Up to 29 conditions per place. [2022-11-25 18:02:26,323 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 26 selfloop transitions, 15 changer transitions 16/57 dead transitions. [2022-11-25 18:02:26,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 57 transitions, 569 flow [2022-11-25 18:02:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:02:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:02:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 798 transitions. [2022-11-25 18:02:26,326 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4208860759493671 [2022-11-25 18:02:26,326 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 798 transitions. [2022-11-25 18:02:26,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 798 transitions. [2022-11-25 18:02:26,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:26,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 798 transitions. [2022-11-25 18:02:26,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 66.5) internal successors, (798), 12 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:26,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 158.0) internal successors, (2054), 13 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:26,331 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 158.0) internal successors, (2054), 13 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:26,332 INFO L175 Difference]: Start difference. First operand has 84 places, 38 transitions, 356 flow. Second operand 12 states and 798 transitions. [2022-11-25 18:02:26,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 57 transitions, 569 flow [2022-11-25 18:02:26,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 57 transitions, 516 flow, removed 13 selfloop flow, removed 12 redundant places. [2022-11-25 18:02:26,336 INFO L231 Difference]: Finished difference. Result has 77 places, 34 transitions, 310 flow [2022-11-25 18:02:26,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=310, PETRI_PLACES=77, PETRI_TRANSITIONS=34} [2022-11-25 18:02:26,337 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2022-11-25 18:02:26,337 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 34 transitions, 310 flow [2022-11-25 18:02:26,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.5) internal successors, (1161), 18 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:26,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:26,338 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:26,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 18:02:26,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 18:02:26,544 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:26,544 INFO L85 PathProgramCache]: Analyzing trace with hash 587818715, now seen corresponding path program 8 times [2022-11-25 18:02:26,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:26,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028430457] [2022-11-25 18:02:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:26,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:26,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:26,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028430457] [2022-11-25 18:02:26,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028430457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:26,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032549001] [2022-11-25 18:02:26,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:26,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:26,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:26,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:02:26,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:02:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:26,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:27,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032549001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:27,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:27,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-25 18:02:27,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437639189] [2022-11-25 18:02:27,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:27,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:02:27,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:27,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:02:27,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:02:27,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2022-11-25 18:02:27,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 34 transitions, 310 flow. Second operand has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:27,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:27,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2022-11-25 18:02:27,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:27,657 INFO L130 PetriNetUnfolder]: 42/100 cut-off events. [2022-11-25 18:02:27,657 INFO L131 PetriNetUnfolder]: For 397/397 co-relation queries the response was YES. [2022-11-25 18:02:27,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 100 events. 42/100 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 266 event pairs, 3 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 527. Up to 24 conditions per place. [2022-11-25 18:02:27,659 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 22 selfloop transitions, 10 changer transitions 17/49 dead transitions. [2022-11-25 18:02:27,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 49 transitions, 478 flow [2022-11-25 18:02:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:02:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:02:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 666 transitions. [2022-11-25 18:02:27,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4215189873417722 [2022-11-25 18:02:27,661 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 666 transitions. [2022-11-25 18:02:27,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 666 transitions. [2022-11-25 18:02:27,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:27,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 666 transitions. [2022-11-25 18:02:27,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 66.6) internal successors, (666), 10 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:27,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:27,665 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:27,665 INFO L175 Difference]: Start difference. First operand has 77 places, 34 transitions, 310 flow. Second operand 10 states and 666 transitions. [2022-11-25 18:02:27,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 49 transitions, 478 flow [2022-11-25 18:02:27,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 49 transitions, 430 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-11-25 18:02:27,668 INFO L231 Difference]: Finished difference. Result has 70 places, 28 transitions, 221 flow [2022-11-25 18:02:27,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=221, PETRI_PLACES=70, PETRI_TRANSITIONS=28} [2022-11-25 18:02:27,669 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2022-11-25 18:02:27,669 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 28 transitions, 221 flow [2022-11-25 18:02:27,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:27,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:27,670 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:27,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:27,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 18:02:27,876 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:02:27,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:27,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2107139429, now seen corresponding path program 9 times [2022-11-25 18:02:27,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:27,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654253881] [2022-11-25 18:02:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:27,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:28,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:28,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654253881] [2022-11-25 18:02:28,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654253881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:28,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134370412] [2022-11-25 18:02:28,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:02:28,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:28,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:28,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:28,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:02:28,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:02:28,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:02:28,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:28,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:28,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134370412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:28,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:28,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-25 18:02:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398737268] [2022-11-25 18:02:28,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:28,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:02:28,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:02:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:02:28,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2022-11-25 18:02:28,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 28 transitions, 221 flow. Second operand has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:28,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:28,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2022-11-25 18:02:28,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:29,053 INFO L130 PetriNetUnfolder]: 29/69 cut-off events. [2022-11-25 18:02:29,053 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-11-25 18:02:29,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 69 events. 29/69 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 152 event pairs, 3 based on Foata normal form. 1/70 useless extension candidates. Maximal degree in co-relation 335. Up to 18 conditions per place. [2022-11-25 18:02:29,056 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2022-11-25 18:02:29,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 33 transitions, 295 flow [2022-11-25 18:02:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:02:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:02:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 593 transitions. [2022-11-25 18:02:29,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4170182841068917 [2022-11-25 18:02:29,067 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 593 transitions. [2022-11-25 18:02:29,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 593 transitions. [2022-11-25 18:02:29,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:29,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 593 transitions. [2022-11-25 18:02:29,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.88888888888889) internal successors, (593), 9 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:29,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:29,072 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:29,072 INFO L175 Difference]: Start difference. First operand has 70 places, 28 transitions, 221 flow. Second operand 9 states and 593 transitions. [2022-11-25 18:02:29,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 33 transitions, 295 flow [2022-11-25 18:02:29,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 33 transitions, 261 flow, removed 1 selfloop flow, removed 9 redundant places. [2022-11-25 18:02:29,075 INFO L231 Difference]: Finished difference. Result has 61 places, 0 transitions, 0 flow [2022-11-25 18:02:29,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=61, PETRI_TRANSITIONS=0} [2022-11-25 18:02:29,075 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2022-11-25 18:02:29,076 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 0 transitions, 0 flow [2022-11-25 18:02:29,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:29,079 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-11-25 18:02:29,079 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-11-25 18:02:29,080 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-11-25 18:02:29,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:29,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 18:02:29,286 INFO L445 BasicCegarLoop]: Path program histogram: [9, 6, 5, 5] [2022-11-25 18:02:29,289 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 18:02:29,289 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:02:29,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:02:29 BasicIcfg [2022-11-25 18:02:29,293 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:02:29,293 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:02:29,293 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:02:29,293 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:02:29,294 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:05" (3/4) ... [2022-11-25 18:02:29,297 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 18:02:29,304 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-11-25 18:02:29,304 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-11-25 18:02:29,310 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-11-25 18:02:29,311 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 18:02:29,311 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-25 18:02:29,311 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 18:02:29,342 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 18:02:29,347 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:02:29,348 INFO L158 Benchmark]: Toolchain (without parser) took 24852.19ms. Allocated memory was 151.0MB in the beginning and 237.0MB in the end (delta: 86.0MB). Free memory was 118.6MB in the beginning and 118.2MB in the end (delta: 362.9kB). Peak memory consumption was 89.5MB. Max. memory is 16.1GB. [2022-11-25 18:02:29,348 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 151.0MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:02:29,349 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.83ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 107.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 18:02:29,352 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.18ms. Allocated memory is still 151.0MB. Free memory was 107.1MB in the beginning and 105.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:02:29,352 INFO L158 Benchmark]: Boogie Preprocessor took 25.22ms. Allocated memory is still 151.0MB. Free memory was 105.5MB in the beginning and 104.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:02:29,353 INFO L158 Benchmark]: RCFGBuilder took 489.45ms. Allocated memory is still 151.0MB. Free memory was 104.4MB in the beginning and 91.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 18:02:29,353 INFO L158 Benchmark]: TraceAbstraction took 23996.24ms. Allocated memory was 151.0MB in the beginning and 237.0MB in the end (delta: 86.0MB). Free memory was 91.4MB in the beginning and 121.1MB in the end (delta: -29.8MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. [2022-11-25 18:02:29,357 INFO L158 Benchmark]: Witness Printer took 54.14ms. Allocated memory is still 237.0MB. Free memory was 120.1MB in the beginning and 118.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:02:29,358 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 151.0MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.83ms. Allocated memory is still 151.0MB. Free memory was 118.6MB in the beginning and 107.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.18ms. Allocated memory is still 151.0MB. Free memory was 107.1MB in the beginning and 105.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.22ms. Allocated memory is still 151.0MB. Free memory was 105.5MB in the beginning and 104.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 489.45ms. Allocated memory is still 151.0MB. Free memory was 104.4MB in the beginning and 91.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 23996.24ms. Allocated memory was 151.0MB in the beginning and 237.0MB in the end (delta: 86.0MB). Free memory was 91.4MB in the beginning and 121.1MB in the end (delta: -29.8MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. * Witness Printer took 54.14ms. Allocated memory is still 237.0MB. Free memory was 120.1MB in the beginning and 118.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 77 PlacesBefore, 20 PlacesAfterwards, 76 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 71 TotalNumberOfCompositions, 560 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 560, independent: 560, independent conditional: 0, independent unconditional: 560, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 402, independent: 402, independent conditional: 0, independent unconditional: 402, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 402, independent: 400, independent conditional: 0, independent unconditional: 400, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 7, independent: 7, independent conditional: 0, independent unconditional: 7, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 560, independent: 158, independent conditional: 0, independent unconditional: 158, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 402, unknown conditional: 0, unknown unconditional: 402] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 79]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 104 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 23.8s, OverallIterations: 25, TraceHistogramMax: 1, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2418 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1986 mSDsluCounter, 1945 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1828 mSDsCounter, 323 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8704 IncrementalHoareTripleChecker+Invalid, 9027 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 323 mSolverCounterUnsat, 117 mSDtfsCounter, 8704 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 568 GetRequests, 242 SyntacticMatches, 30 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=814occurred in iteration=12, InterpolantAutomatonStates: 213, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 516 NumberOfCodeBlocks, 516 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 632 ConstructedInterpolants, 0 QuantifiedInterpolants, 3996 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1314 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 47 InterpolantComputations, 16 PerfectInterpolantSequences, 11/68 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-25 18:02:29,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6653888-d3eb-4cfe-b7d3-06c8a0c0b32a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE