./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.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_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/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_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/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_eaaac231-90fe-4354-881f-6f4818f0061b/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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --- 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 15:27:03,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:27:03,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:27:03,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:27:03,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:27:03,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:27:03,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:27:03,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:27:03,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:27:03,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:27:03,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:27:03,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:27:03,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:27:03,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:27:03,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:27:03,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:27:03,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:27:03,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:27:03,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:27:03,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:27:03,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:27:03,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:27:03,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:27:03,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:27:03,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:27:03,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:27:03,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:27:03,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:27:03,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:27:03,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:27:03,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:27:03,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:27:03,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:27:03,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:27:03,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:27:03,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:27:03,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:27:03,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:27:03,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:27:03,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:27:03,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:27:03,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:27:03,849 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:27:03,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:27:03,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:27:03,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:27:03,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:27:03,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:27:03,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:27:03,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:27:03,853 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:27:03,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:27:03,854 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:27:03,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:27:03,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:27:03,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:27:03,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:27:03,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:27:03,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:27:03,855 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:27:03,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:27:03,856 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:27:03,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:27:03,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:27:03,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:27:03,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:27:03,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:27:03,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:27:03,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:27:03,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:27:03,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:27:03,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:27:03,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:27:03,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:27:03,859 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:27:03,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:27:03,860 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_eaaac231-90fe-4354-881f-6f4818f0061b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 [2022-11-25 15:27:04,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:27:04,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:27:04,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:27:04,208 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:27:04,208 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:27:04,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-11-25 15:27:07,401 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:27:07,681 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:27:07,682 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-11-25 15:27:07,689 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/data/5ac7f0998/1256ec219dbd49e989ad624372c3e2cd/FLAG24470ef18 [2022-11-25 15:27:07,713 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/data/5ac7f0998/1256ec219dbd49e989ad624372c3e2cd [2022-11-25 15:27:07,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:27:07,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:27:07,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:27:07,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:27:07,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:27:07,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:27:07" (1/1) ... [2022-11-25 15:27:07,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2795d41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:07, skipping insertion in model container [2022-11-25 15:27:07,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:27:07" (1/1) ... [2022-11-25 15:27:07,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:27:07,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:27:07,934 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:07,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:07,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:07,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:07,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:07,944 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:07,945 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:07,946 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:07,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:07,960 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:07,970 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_eaaac231-90fe-4354-881f-6f4818f0061b/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-11-25 15:27:07,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:27:07,993 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:27:08,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:08,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:08,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:08,021 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:08,022 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:08,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:08,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:08,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:08,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:27:08,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:27:08,035 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_eaaac231-90fe-4354-881f-6f4818f0061b/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-11-25 15:27:08,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:27:08,056 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:27:08,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08 WrapperNode [2022-11-25 15:27:08,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:27:08,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:27:08,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:27:08,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:27:08,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,118 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 257 [2022-11-25 15:27:08,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:27:08,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:27:08,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:27:08,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:27:08,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,155 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:27:08,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:27:08,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:27:08,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:27:08,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (1/1) ... [2022-11-25 15:27:08,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:27:08,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:08,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:27:08,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:27:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:27:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:27:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:27:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:27:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:27:08,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:27:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:27:08,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:27:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 15:27:08,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 15:27:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:27:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:27:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:27:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:27:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:27:08,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:27:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:27:08,255 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 15:27:08,387 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:27:08,392 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:27:09,109 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:27:09,314 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:27:09,314 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 15:27:09,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:27:09 BoogieIcfgContainer [2022-11-25 15:27:09,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:27:09,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:27:09,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:27:09,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:27:09,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:27:07" (1/3) ... [2022-11-25 15:27:09,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6416581e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:27:09, skipping insertion in model container [2022-11-25 15:27:09,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:08" (2/3) ... [2022-11-25 15:27:09,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6416581e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:27:09, skipping insertion in model container [2022-11-25 15:27:09,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:27:09" (3/3) ... [2022-11-25 15:27:09,335 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2022-11-25 15:27:09,346 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:27:09,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:27:09,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:27:09,361 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:27:09,436 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 15:27:09,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 223 transitions, 470 flow [2022-11-25 15:27:09,588 INFO L130 PetriNetUnfolder]: 18/220 cut-off events. [2022-11-25 15:27:09,589 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:27:09,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 220 events. 18/220 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 123 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 180. Up to 3 conditions per place. [2022-11-25 15:27:09,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 223 transitions, 470 flow [2022-11-25 15:27:09,603 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 209 transitions, 436 flow [2022-11-25 15:27:09,608 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:27:09,625 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 209 transitions, 436 flow [2022-11-25 15:27:09,629 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 209 transitions, 436 flow [2022-11-25 15:27:09,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 209 transitions, 436 flow [2022-11-25 15:27:09,719 INFO L130 PetriNetUnfolder]: 18/209 cut-off events. [2022-11-25 15:27:09,725 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:27:09,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 209 events. 18/209 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 122 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 180. Up to 3 conditions per place. [2022-11-25 15:27:09,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 1880 [2022-11-25 15:27:21,988 INFO L134 LiptonReduction]: Checked pairs total: 2599 [2022-11-25 15:27:21,988 INFO L136 LiptonReduction]: Total number of compositions: 225 [2022-11-25 15:27:22,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:27:22,035 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;@6cade10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:27:22,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 15:27:22,058 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2022-11-25 15:27:22,059 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 15:27:22,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:22,060 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:22,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:22,067 INFO L85 PathProgramCache]: Analyzing trace with hash -995927258, now seen corresponding path program 1 times [2022-11-25 15:27:22,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:22,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154699044] [2022-11-25 15:27:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:22,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:22,476 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 15:27:22,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:22,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154699044] [2022-11-25 15:27:22,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154699044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:22,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:22,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:27:22,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098690214] [2022-11-25 15:27:22,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:22,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:27:22,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:22,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:27:22,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:27:22,541 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 448 [2022-11-25 15:27:22,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 208.0) internal successors, (416), 2 states have internal predecessors, (416), 0 states have call successors, (0), 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 15:27:22,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:22,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 448 [2022-11-25 15:27:22,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:22,791 INFO L130 PetriNetUnfolder]: 323/460 cut-off events. [2022-11-25 15:27:22,791 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-25 15:27:22,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 460 events. 323/460 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1334 event pairs, 190 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 765. Up to 460 conditions per place. [2022-11-25 15:27:22,802 INFO L137 encePairwiseOnDemand]: 447/448 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2022-11-25 15:27:22,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 124 flow [2022-11-25 15:27:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:27:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 15:27:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 423 transitions. [2022-11-25 15:27:22,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4720982142857143 [2022-11-25 15:27:22,834 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 423 transitions. [2022-11-25 15:27:22,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 423 transitions. [2022-11-25 15:27:22,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:22,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 423 transitions. [2022-11-25 15:27:22,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 211.5) internal successors, (423), 2 states have internal predecessors, (423), 0 states have call successors, (0), 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 15:27:22,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 448.0) internal successors, (1344), 3 states have internal predecessors, (1344), 0 states have call successors, (0), 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 15:27:22,857 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 448.0) internal successors, (1344), 3 states have internal predecessors, (1344), 0 states have call successors, (0), 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 15:27:22,859 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 423 transitions. [2022-11-25 15:27:22,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 124 flow [2022-11-25 15:27:22,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 15:27:22,880 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2022-11-25 15:27:22,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, 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=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2022-11-25 15:27:22,887 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2022-11-25 15:27:22,887 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2022-11-25 15:27:22,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 208.0) internal successors, (416), 2 states have internal predecessors, (416), 0 states have call successors, (0), 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 15:27:22,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:22,888 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:22,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:27:22,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:22,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2101595643, now seen corresponding path program 1 times [2022-11-25 15:27:22,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:22,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89432758] [2022-11-25 15:27:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:22,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:23,314 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 15:27:23,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:23,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89432758] [2022-11-25 15:27:23,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89432758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:23,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:23,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:27:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873876416] [2022-11-25 15:27:23,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:23,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:27:23,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:23,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:27:23,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:27:23,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 448 [2022-11-25 15:27:23,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 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 15:27:23,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:23,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 448 [2022-11-25 15:27:23,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:23,611 INFO L130 PetriNetUnfolder]: 354/534 cut-off events. [2022-11-25 15:27:23,611 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 15:27:23,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 534 events. 354/534 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1731 event pairs, 212 based on Foata normal form. 52/442 useless extension candidates. Maximal degree in co-relation 1089. Up to 460 conditions per place. [2022-11-25 15:27:23,615 INFO L137 encePairwiseOnDemand]: 441/448 looper letters, 25 selfloop transitions, 2 changer transitions 25/53 dead transitions. [2022-11-25 15:27:23,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 53 transitions, 222 flow [2022-11-25 15:27:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:27:23,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:27:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 998 transitions. [2022-11-25 15:27:23,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4455357142857143 [2022-11-25 15:27:23,620 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 998 transitions. [2022-11-25 15:27:23,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 998 transitions. [2022-11-25 15:27:23,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:23,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 998 transitions. [2022-11-25 15:27:23,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 199.6) internal successors, (998), 5 states have internal predecessors, (998), 0 states have call successors, (0), 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 15:27:23,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 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 15:27:23,632 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 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 15:27:23,633 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 5 states and 998 transitions. [2022-11-25 15:27:23,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 53 transitions, 222 flow [2022-11-25 15:27:23,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:27:23,635 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 86 flow [2022-11-25 15:27:23,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2022-11-25 15:27:23,636 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2022-11-25 15:27:23,637 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 86 flow [2022-11-25 15:27:23,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 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 15:27:23,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:23,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:27:23,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1053409905, now seen corresponding path program 1 times [2022-11-25 15:27:23,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115783530] [2022-11-25 15:27:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:23,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:23,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:23,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115783530] [2022-11-25 15:27:23,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115783530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:23,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:23,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:27:23,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459019414] [2022-11-25 15:27:23,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:27:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:27:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:27:23,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 448 [2022-11-25 15:27:23,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 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 15:27:23,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:23,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 448 [2022-11-25 15:27:23,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:24,124 INFO L130 PetriNetUnfolder]: 452/664 cut-off events. [2022-11-25 15:27:24,125 INFO L131 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2022-11-25 15:27:24,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 664 events. 452/664 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2309 event pairs, 280 based on Foata normal form. 46/539 useless extension candidates. Maximal degree in co-relation 1890. Up to 461 conditions per place. [2022-11-25 15:27:24,130 INFO L137 encePairwiseOnDemand]: 441/448 looper letters, 26 selfloop transitions, 2 changer transitions 14/43 dead transitions. [2022-11-25 15:27:24,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 218 flow [2022-11-25 15:27:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:27:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:27:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 797 transitions. [2022-11-25 15:27:24,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4447544642857143 [2022-11-25 15:27:24,134 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 797 transitions. [2022-11-25 15:27:24,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 797 transitions. [2022-11-25 15:27:24,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:24,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 797 transitions. [2022-11-25 15:27:24,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 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 15:27:24,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 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 15:27:24,143 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 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 15:27:24,143 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 86 flow. Second operand 4 states and 797 transitions. [2022-11-25 15:27:24,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 218 flow [2022-11-25 15:27:24,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 198 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-25 15:27:24,146 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2022-11-25 15:27:24,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2022-11-25 15:27:24,147 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2022-11-25 15:27:24,148 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2022-11-25 15:27:24,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 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 15:27:24,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:24,149 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:24,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:27:24,150 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 121594427, now seen corresponding path program 1 times [2022-11-25 15:27:24,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:24,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296636587] [2022-11-25 15:27:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:27:25,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296636587] [2022-11-25 15:27:25,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296636587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:25,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:25,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:27:25,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191888077] [2022-11-25 15:27:25,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:25,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:27:25,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:27:25,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:27:25,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 448 [2022-11-25 15:27:25,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 184.66666666666666) internal successors, (1662), 9 states have internal predecessors, (1662), 0 states have call successors, (0), 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 15:27:25,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:25,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 448 [2022-11-25 15:27:25,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:26,472 INFO L130 PetriNetUnfolder]: 594/862 cut-off events. [2022-11-25 15:27:26,472 INFO L131 PetriNetUnfolder]: For 153/153 co-relation queries the response was YES. [2022-11-25 15:27:26,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 862 events. 594/862 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2914 event pairs, 13 based on Foata normal form. 1/652 useless extension candidates. Maximal degree in co-relation 2251. Up to 576 conditions per place. [2022-11-25 15:27:26,479 INFO L137 encePairwiseOnDemand]: 437/448 looper letters, 71 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2022-11-25 15:27:26,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 102 transitions, 519 flow [2022-11-25 15:27:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:27:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:27:26,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1739 transitions. [2022-11-25 15:27:26,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4312996031746032 [2022-11-25 15:27:26,486 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1739 transitions. [2022-11-25 15:27:26,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1739 transitions. [2022-11-25 15:27:26,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:26,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1739 transitions. [2022-11-25 15:27:26,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.22222222222223) internal successors, (1739), 9 states have internal predecessors, (1739), 0 states have call successors, (0), 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 15:27:26,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 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 15:27:26,502 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 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 15:27:26,503 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 9 states and 1739 transitions. [2022-11-25 15:27:26,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 102 transitions, 519 flow [2022-11-25 15:27:26,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 102 transitions, 515 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 15:27:26,508 INFO L231 Difference]: Finished difference. Result has 45 places, 55 transitions, 287 flow [2022-11-25 15:27:26,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=45, PETRI_TRANSITIONS=55} [2022-11-25 15:27:26,510 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2022-11-25 15:27:26,510 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 55 transitions, 287 flow [2022-11-25 15:27:26,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 184.66666666666666) internal successors, (1662), 9 states have internal predecessors, (1662), 0 states have call successors, (0), 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 15:27:26,512 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:26,512 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:26,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:27:26,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1141277737, now seen corresponding path program 2 times [2022-11-25 15:27:26,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:26,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044999671] [2022-11-25 15:27:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:26,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:27:26,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:26,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044999671] [2022-11-25 15:27:26,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044999671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:26,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:26,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:27:26,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367515670] [2022-11-25 15:27:26,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:26,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:27:26,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:27:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:27:26,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 448 [2022-11-25 15:27:26,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 55 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 15:27:26,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:26,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 448 [2022-11-25 15:27:26,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:26,939 INFO L130 PetriNetUnfolder]: 485/716 cut-off events. [2022-11-25 15:27:26,940 INFO L131 PetriNetUnfolder]: For 463/476 co-relation queries the response was YES. [2022-11-25 15:27:26,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 716 events. 485/716 cut-off events. For 463/476 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2220 event pairs, 107 based on Foata normal form. 27/569 useless extension candidates. Maximal degree in co-relation 2435. Up to 632 conditions per place. [2022-11-25 15:27:26,947 INFO L137 encePairwiseOnDemand]: 444/448 looper letters, 55 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2022-11-25 15:27:26,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 421 flow [2022-11-25 15:27:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:27:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:27:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2022-11-25 15:27:26,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2022-11-25 15:27:26,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2022-11-25 15:27:26,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2022-11-25 15:27:26,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:26,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2022-11-25 15:27:26,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 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 15:27:26,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 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 15:27:26,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 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 15:27:26,958 INFO L175 Difference]: Start difference. First operand has 45 places, 55 transitions, 287 flow. Second operand 3 states and 620 transitions. [2022-11-25 15:27:26,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 421 flow [2022-11-25 15:27:26,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 363 flow, removed 28 selfloop flow, removed 2 redundant places. [2022-11-25 15:27:26,967 INFO L231 Difference]: Finished difference. Result has 46 places, 53 transitions, 238 flow [2022-11-25 15:27:26,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=46, PETRI_TRANSITIONS=53} [2022-11-25 15:27:26,971 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2022-11-25 15:27:26,972 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 53 transitions, 238 flow [2022-11-25 15:27:26,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 15:27:26,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:26,973 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:26,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:27:26,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1380498909, now seen corresponding path program 3 times [2022-11-25 15:27:26,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:26,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259276538] [2022-11-25 15:27:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:26,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:27:28,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:28,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259276538] [2022-11-25 15:27:28,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259276538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:28,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:28,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:27:28,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879318919] [2022-11-25 15:27:28,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:28,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:27:28,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:28,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:27:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:27:28,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 448 [2022-11-25 15:27:28,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 53 transitions, 238 flow. Second operand has 9 states, 9 states have (on average 183.66666666666666) internal successors, (1653), 9 states have internal predecessors, (1653), 0 states have call successors, (0), 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 15:27:28,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:28,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 448 [2022-11-25 15:27:28,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:28,909 INFO L130 PetriNetUnfolder]: 604/893 cut-off events. [2022-11-25 15:27:28,909 INFO L131 PetriNetUnfolder]: For 488/488 co-relation queries the response was YES. [2022-11-25 15:27:28,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 893 events. 604/893 cut-off events. For 488/488 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2981 event pairs, 93 based on Foata normal form. 1/692 useless extension candidates. Maximal degree in co-relation 2897. Up to 754 conditions per place. [2022-11-25 15:27:28,919 INFO L137 encePairwiseOnDemand]: 437/448 looper letters, 74 selfloop transitions, 24 changer transitions 3/101 dead transitions. [2022-11-25 15:27:28,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 101 transitions, 604 flow [2022-11-25 15:27:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:27:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:27:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1712 transitions. [2022-11-25 15:27:28,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2022-11-25 15:27:28,926 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1712 transitions. [2022-11-25 15:27:28,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1712 transitions. [2022-11-25 15:27:28,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:28,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1712 transitions. [2022-11-25 15:27:28,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 190.22222222222223) internal successors, (1712), 9 states have internal predecessors, (1712), 0 states have call successors, (0), 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 15:27:28,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 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 15:27:28,941 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 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 15:27:28,941 INFO L175 Difference]: Start difference. First operand has 46 places, 53 transitions, 238 flow. Second operand 9 states and 1712 transitions. [2022-11-25 15:27:28,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 101 transitions, 604 flow [2022-11-25 15:27:28,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 101 transitions, 577 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-25 15:27:28,950 INFO L231 Difference]: Finished difference. Result has 56 places, 68 transitions, 383 flow [2022-11-25 15:27:28,950 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=383, PETRI_PLACES=56, PETRI_TRANSITIONS=68} [2022-11-25 15:27:28,953 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2022-11-25 15:27:28,953 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 68 transitions, 383 flow [2022-11-25 15:27:28,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 183.66666666666666) internal successors, (1653), 9 states have internal predecessors, (1653), 0 states have call successors, (0), 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 15:27:28,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:28,955 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:28,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:27:28,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash 975896863, now seen corresponding path program 4 times [2022-11-25 15:27:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:28,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587376949] [2022-11-25 15:27:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:28,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:27:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:30,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587376949] [2022-11-25 15:27:30,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587376949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:30,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:30,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:27:30,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246535218] [2022-11-25 15:27:30,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:30,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:27:30,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:30,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:27:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:27:30,244 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 448 [2022-11-25 15:27:30,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 68 transitions, 383 flow. Second operand has 9 states, 9 states have (on average 183.66666666666666) internal successors, (1653), 9 states have internal predecessors, (1653), 0 states have call successors, (0), 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 15:27:30,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:30,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 448 [2022-11-25 15:27:30,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:30,859 INFO L130 PetriNetUnfolder]: 687/1017 cut-off events. [2022-11-25 15:27:30,860 INFO L131 PetriNetUnfolder]: For 837/837 co-relation queries the response was YES. [2022-11-25 15:27:30,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 1017 events. 687/1017 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3478 event pairs, 133 based on Foata normal form. 1/792 useless extension candidates. Maximal degree in co-relation 3530. Up to 878 conditions per place. [2022-11-25 15:27:30,915 INFO L137 encePairwiseOnDemand]: 437/448 looper letters, 80 selfloop transitions, 27 changer transitions 3/110 dead transitions. [2022-11-25 15:27:30,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 110 transitions, 772 flow [2022-11-25 15:27:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:27:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:27:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1708 transitions. [2022-11-25 15:27:30,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2022-11-25 15:27:30,922 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1708 transitions. [2022-11-25 15:27:30,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1708 transitions. [2022-11-25 15:27:30,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:30,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1708 transitions. [2022-11-25 15:27:30,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.77777777777777) internal successors, (1708), 9 states have internal predecessors, (1708), 0 states have call successors, (0), 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 15:27:30,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 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 15:27:31,001 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 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 15:27:31,001 INFO L175 Difference]: Start difference. First operand has 56 places, 68 transitions, 383 flow. Second operand 9 states and 1708 transitions. [2022-11-25 15:27:31,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 110 transitions, 772 flow [2022-11-25 15:27:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 110 transitions, 722 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-25 15:27:31,029 INFO L231 Difference]: Finished difference. Result has 65 places, 82 transitions, 540 flow [2022-11-25 15:27:31,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=65, PETRI_TRANSITIONS=82} [2022-11-25 15:27:31,030 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 33 predicate places. [2022-11-25 15:27:31,030 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 82 transitions, 540 flow [2022-11-25 15:27:31,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 183.66666666666666) internal successors, (1653), 9 states have internal predecessors, (1653), 0 states have call successors, (0), 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 15:27:31,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:31,031 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:31,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:27:31,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:31,032 INFO L85 PathProgramCache]: Analyzing trace with hash 792710843, now seen corresponding path program 5 times [2022-11-25 15:27:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:31,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755665079] [2022-11-25 15:27:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:27:32,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755665079] [2022-11-25 15:27:32,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755665079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:32,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:32,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:27:32,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234140312] [2022-11-25 15:27:32,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:32,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:27:32,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:32,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:27:32,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:27:32,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 448 [2022-11-25 15:27:32,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 82 transitions, 540 flow. Second operand has 9 states, 9 states have (on average 184.66666666666666) internal successors, (1662), 9 states have internal predecessors, (1662), 0 states have call successors, (0), 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 15:27:32,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:32,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 448 [2022-11-25 15:27:32,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:33,021 INFO L130 PetriNetUnfolder]: 696/1041 cut-off events. [2022-11-25 15:27:33,021 INFO L131 PetriNetUnfolder]: For 1184/1184 co-relation queries the response was YES. [2022-11-25 15:27:33,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 1041 events. 696/1041 cut-off events. For 1184/1184 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3696 event pairs, 59 based on Foata normal form. 1/842 useless extension candidates. Maximal degree in co-relation 3905. Up to 813 conditions per place. [2022-11-25 15:27:33,032 INFO L137 encePairwiseOnDemand]: 437/448 looper letters, 88 selfloop transitions, 37 changer transitions 3/128 dead transitions. [2022-11-25 15:27:33,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 128 transitions, 955 flow [2022-11-25 15:27:33,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:27:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:27:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1729 transitions. [2022-11-25 15:27:33,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4288194444444444 [2022-11-25 15:27:33,039 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1729 transitions. [2022-11-25 15:27:33,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1729 transitions. [2022-11-25 15:27:33,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:33,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1729 transitions. [2022-11-25 15:27:33,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.11111111111111) internal successors, (1729), 9 states have internal predecessors, (1729), 0 states have call successors, (0), 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 15:27:33,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 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 15:27:33,053 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 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 15:27:33,053 INFO L175 Difference]: Start difference. First operand has 65 places, 82 transitions, 540 flow. Second operand 9 states and 1729 transitions. [2022-11-25 15:27:33,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 128 transitions, 955 flow [2022-11-25 15:27:33,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 128 transitions, 900 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-11-25 15:27:33,064 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 654 flow [2022-11-25 15:27:33,065 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=654, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2022-11-25 15:27:33,065 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2022-11-25 15:27:33,066 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 654 flow [2022-11-25 15:27:33,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 184.66666666666666) internal successors, (1662), 9 states have internal predecessors, (1662), 0 states have call successors, (0), 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 15:27:33,067 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:33,067 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:33,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:27:33,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1196480779, now seen corresponding path program 6 times [2022-11-25 15:27:33,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:33,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462895905] [2022-11-25 15:27:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:33,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:27:33,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:33,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462895905] [2022-11-25 15:27:33,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462895905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:33,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:33,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:27:33,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475138555] [2022-11-25 15:27:33,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:33,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:27:33,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:33,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:27:33,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:27:33,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 448 [2022-11-25 15:27:33,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 654 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 15:27:33,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:33,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 448 [2022-11-25 15:27:33,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:33,506 INFO L130 PetriNetUnfolder]: 600/944 cut-off events. [2022-11-25 15:27:33,507 INFO L131 PetriNetUnfolder]: For 2211/2228 co-relation queries the response was YES. [2022-11-25 15:27:33,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3705 conditions, 944 events. 600/944 cut-off events. For 2211/2228 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3626 event pairs, 177 based on Foata normal form. 107/889 useless extension candidates. Maximal degree in co-relation 3681. Up to 648 conditions per place. [2022-11-25 15:27:33,517 INFO L137 encePairwiseOnDemand]: 443/448 looper letters, 72 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2022-11-25 15:27:33,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 758 flow [2022-11-25 15:27:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:27:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:27:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2022-11-25 15:27:33,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46205357142857145 [2022-11-25 15:27:33,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2022-11-25 15:27:33,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2022-11-25 15:27:33,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:33,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2022-11-25 15:27:33,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 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 15:27:33,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 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 15:27:33,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 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 15:27:33,528 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 654 flow. Second operand 3 states and 621 transitions. [2022-11-25 15:27:33,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 758 flow [2022-11-25 15:27:33,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 654 flow, removed 22 selfloop flow, removed 9 redundant places. [2022-11-25 15:27:33,553 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 495 flow [2022-11-25 15:27:33,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=495, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2022-11-25 15:27:33,555 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2022-11-25 15:27:33,555 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 495 flow [2022-11-25 15:27:33,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 15:27:33,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:33,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:33,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:27:33,561 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash -197733508, now seen corresponding path program 1 times [2022-11-25 15:27:33,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:33,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290781461] [2022-11-25 15:27:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:33,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:27:33,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:33,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290781461] [2022-11-25 15:27:33,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290781461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:27:33,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566824610] [2022-11-25 15:27:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:33,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:27:33,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:27:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:27:33,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:27:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:27:34,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:27:34,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566824610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:34,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:27:34,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-25 15:27:34,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73411356] [2022-11-25 15:27:34,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:34,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:27:34,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:34,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:27:34,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:27:34,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 448 [2022-11-25 15:27:34,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 495 flow. Second operand has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 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 15:27:34,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:34,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 448 [2022-11-25 15:27:34,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:34,434 INFO L130 PetriNetUnfolder]: 804/1264 cut-off events. [2022-11-25 15:27:34,434 INFO L131 PetriNetUnfolder]: For 2174/2182 co-relation queries the response was YES. [2022-11-25 15:27:34,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4883 conditions, 1264 events. 804/1264 cut-off events. For 2174/2182 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5279 event pairs, 219 based on Foata normal form. 20/1032 useless extension candidates. Maximal degree in co-relation 4860. Up to 576 conditions per place. [2022-11-25 15:27:34,450 INFO L137 encePairwiseOnDemand]: 443/448 looper letters, 63 selfloop transitions, 39 changer transitions 4/108 dead transitions. [2022-11-25 15:27:34,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 108 transitions, 871 flow [2022-11-25 15:27:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:27:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:27:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 836 transitions. [2022-11-25 15:27:34,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46651785714285715 [2022-11-25 15:27:34,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 836 transitions. [2022-11-25 15:27:34,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 836 transitions. [2022-11-25 15:27:34,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:34,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 836 transitions. [2022-11-25 15:27:34,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 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 15:27:34,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 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 15:27:34,461 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 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 15:27:34,462 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 495 flow. Second operand 4 states and 836 transitions. [2022-11-25 15:27:34,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 108 transitions, 871 flow [2022-11-25 15:27:34,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 848 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 15:27:34,479 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 642 flow [2022-11-25 15:27:34,479 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=642, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2022-11-25 15:27:34,480 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2022-11-25 15:27:34,480 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 642 flow [2022-11-25 15:27:34,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 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 15:27:34,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:34,490 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:34,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:27:34,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 15:27:34,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1817131051, now seen corresponding path program 1 times [2022-11-25 15:27:34,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:34,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948630415] [2022-11-25 15:27:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:34,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:34,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:34,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948630415] [2022-11-25 15:27:34,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948630415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:27:34,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791067865] [2022-11-25 15:27:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:34,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:34,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:27:34,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:27:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:27:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:27:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:35,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:27:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:35,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791067865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:27:35,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:27:35,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 15:27:35,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321322004] [2022-11-25 15:27:35,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:27:35,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:27:35,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:35,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:27:35,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:27:35,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 448 [2022-11-25 15:27:35,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 642 flow. Second operand has 12 states, 12 states have (on average 185.16666666666666) internal successors, (2222), 12 states have internal predecessors, (2222), 0 states have call successors, (0), 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 15:27:35,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:35,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 448 [2022-11-25 15:27:35,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:36,190 INFO L130 PetriNetUnfolder]: 1246/1993 cut-off events. [2022-11-25 15:27:36,190 INFO L131 PetriNetUnfolder]: For 5311/5327 co-relation queries the response was YES. [2022-11-25 15:27:36,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8917 conditions, 1993 events. 1246/1993 cut-off events. For 5311/5327 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9171 event pairs, 582 based on Foata normal form. 80/1705 useless extension candidates. Maximal degree in co-relation 8892. Up to 1138 conditions per place. [2022-11-25 15:27:36,213 INFO L137 encePairwiseOnDemand]: 443/448 looper letters, 142 selfloop transitions, 7 changer transitions 5/156 dead transitions. [2022-11-25 15:27:36,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 156 transitions, 1572 flow [2022-11-25 15:27:36,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:27:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:27:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1153 transitions. [2022-11-25 15:27:36,218 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4289434523809524 [2022-11-25 15:27:36,218 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1153 transitions. [2022-11-25 15:27:36,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1153 transitions. [2022-11-25 15:27:36,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:36,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1153 transitions. [2022-11-25 15:27:36,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 0 states have call successors, (0), 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 15:27:36,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 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 15:27:36,227 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 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 15:27:36,228 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 642 flow. Second operand 6 states and 1153 transitions. [2022-11-25 15:27:36,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 156 transitions, 1572 flow [2022-11-25 15:27:36,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 156 transitions, 1534 flow, removed 16 selfloop flow, removed 1 redundant places. [2022-11-25 15:27:36,272 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 706 flow [2022-11-25 15:27:36,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=706, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2022-11-25 15:27:36,273 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2022-11-25 15:27:36,274 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 706 flow [2022-11-25 15:27:36,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 185.16666666666666) internal successors, (2222), 12 states have internal predecessors, (2222), 0 states have call successors, (0), 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 15:27:36,275 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:36,275 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:36,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:27:36,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:36,492 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:36,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1231407300, now seen corresponding path program 1 times [2022-11-25 15:27:36,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:36,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540582676] [2022-11-25 15:27:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:36,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:36,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540582676] [2022-11-25 15:27:36,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540582676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:27:36,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988947352] [2022-11-25 15:27:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:36,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:36,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:36,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:27:36,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:27:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:27:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:27:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:37,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:27:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:37,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988947352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:27:37,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:27:37,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 15:27:37,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703724191] [2022-11-25 15:27:37,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:27:37,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:27:37,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:27:37,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:27:37,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 448 [2022-11-25 15:27:37,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 706 flow. Second operand has 12 states, 12 states have (on average 185.25) internal successors, (2223), 12 states have internal predecessors, (2223), 0 states have call successors, (0), 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 15:27:37,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:37,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 448 [2022-11-25 15:27:37,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:38,138 INFO L130 PetriNetUnfolder]: 1736/2867 cut-off events. [2022-11-25 15:27:38,139 INFO L131 PetriNetUnfolder]: For 8111/8143 co-relation queries the response was YES. [2022-11-25 15:27:38,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12182 conditions, 2867 events. 1736/2867 cut-off events. For 8111/8143 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15168 event pairs, 907 based on Foata normal form. 108/2551 useless extension candidates. Maximal degree in co-relation 12154. Up to 1792 conditions per place. [2022-11-25 15:27:38,183 INFO L137 encePairwiseOnDemand]: 443/448 looper letters, 109 selfloop transitions, 6 changer transitions 23/140 dead transitions. [2022-11-25 15:27:38,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 140 transitions, 1390 flow [2022-11-25 15:27:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:27:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:27:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1153 transitions. [2022-11-25 15:27:38,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4289434523809524 [2022-11-25 15:27:38,188 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1153 transitions. [2022-11-25 15:27:38,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1153 transitions. [2022-11-25 15:27:38,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:38,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1153 transitions. [2022-11-25 15:27:38,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 0 states have call successors, (0), 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 15:27:38,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 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 15:27:38,198 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 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 15:27:38,198 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 706 flow. Second operand 6 states and 1153 transitions. [2022-11-25 15:27:38,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 140 transitions, 1390 flow [2022-11-25 15:27:38,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 1338 flow, removed 21 selfloop flow, removed 3 redundant places. [2022-11-25 15:27:38,256 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 763 flow [2022-11-25 15:27:38,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2022-11-25 15:27:38,258 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2022-11-25 15:27:38,258 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 763 flow [2022-11-25 15:27:38,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 185.25) internal successors, (2223), 12 states have internal predecessors, (2223), 0 states have call successors, (0), 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 15:27:38,260 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:38,260 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:38,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:27:38,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 15:27:38,466 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:38,467 INFO L85 PathProgramCache]: Analyzing trace with hash 675580761, now seen corresponding path program 2 times [2022-11-25 15:27:38,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:38,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021850215] [2022-11-25 15:27:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:38,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:27:40,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:40,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021850215] [2022-11-25 15:27:40,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021850215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:27:40,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949585319] [2022-11-25 15:27:40,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:27:40,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:40,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:40,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:27:40,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:27:40,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:27:40,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:27:40,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 15:27:40,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:27:40,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:27:40,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:27:40,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:27:40,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:27:41,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 15:27:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:41,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:27:41,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:27:41,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 155 [2022-11-25 15:27:41,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 114 [2022-11-25 15:27:41,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 102 [2022-11-25 15:27:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:42,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949585319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:27:42,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:27:42,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-11-25 15:27:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178139147] [2022-11-25 15:27:42,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:27:42,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 15:27:42,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 15:27:42,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=693, Unknown=1, NotChecked=0, Total=812 [2022-11-25 15:27:44,769 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 448 [2022-11-25 15:27:44,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 763 flow. Second operand has 29 states, 29 states have (on average 140.10344827586206) internal successors, (4063), 29 states have internal predecessors, (4063), 0 states have call successors, (0), 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 15:27:44,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:27:44,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 448 [2022-11-25 15:27:44,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:27:56,650 INFO L130 PetriNetUnfolder]: 10667/16903 cut-off events. [2022-11-25 15:27:56,650 INFO L131 PetriNetUnfolder]: For 50206/50278 co-relation queries the response was YES. [2022-11-25 15:27:56,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67049 conditions, 16903 events. 10667/16903 cut-off events. For 50206/50278 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 113723 event pairs, 1152 based on Foata normal form. 205/13904 useless extension candidates. Maximal degree in co-relation 67019. Up to 5206 conditions per place. [2022-11-25 15:27:56,964 INFO L137 encePairwiseOnDemand]: 428/448 looper letters, 742 selfloop transitions, 261 changer transitions 1/1006 dead transitions. [2022-11-25 15:27:56,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 1006 transitions, 9000 flow [2022-11-25 15:27:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-25 15:27:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-25 15:27:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 9365 transitions. [2022-11-25 15:27:56,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3318098072562358 [2022-11-25 15:27:56,998 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 9365 transitions. [2022-11-25 15:27:56,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 9365 transitions. [2022-11-25 15:27:57,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:27:57,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 9365 transitions. [2022-11-25 15:27:57,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 148.65079365079364) internal successors, (9365), 63 states have internal predecessors, (9365), 0 states have call successors, (0), 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 15:27:57,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 448.0) internal successors, (28672), 64 states have internal predecessors, (28672), 0 states have call successors, (0), 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 15:27:57,082 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 448.0) internal successors, (28672), 64 states have internal predecessors, (28672), 0 states have call successors, (0), 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 15:27:57,082 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 763 flow. Second operand 63 states and 9365 transitions. [2022-11-25 15:27:57,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 1006 transitions, 9000 flow [2022-11-25 15:27:57,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 1006 transitions, 8687 flow, removed 140 selfloop flow, removed 3 redundant places. [2022-11-25 15:27:57,579 INFO L231 Difference]: Finished difference. Result has 176 places, 368 transitions, 3725 flow [2022-11-25 15:27:57,580 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=3725, PETRI_PLACES=176, PETRI_TRANSITIONS=368} [2022-11-25 15:27:57,580 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 144 predicate places. [2022-11-25 15:27:57,580 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 368 transitions, 3725 flow [2022-11-25 15:27:57,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 140.10344827586206) internal successors, (4063), 29 states have internal predecessors, (4063), 0 states have call successors, (0), 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 15:27:57,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:27:57,582 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:57,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:27:57,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:27:57,789 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:27:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:57,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2142928427, now seen corresponding path program 3 times [2022-11-25 15:27:57,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:57,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990409594] [2022-11-25 15:27:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:57,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:58,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990409594] [2022-11-25 15:27:58,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990409594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:27:58,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523007443] [2022-11-25 15:27:58,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:27:58,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:58,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:58,887 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:27:58,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:27:59,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:27:59,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:27:59,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 15:27:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:27:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:27:59,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:27:59,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 15:27:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:27:59,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:27:59,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:27:59,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-25 15:27:59,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-25 15:28:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:28:00,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523007443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:28:00,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:28:00,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 15:28:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612244386] [2022-11-25 15:28:00,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:28:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:28:00,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:28:00,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:28:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=507, Unknown=1, NotChecked=0, Total=600 [2022-11-25 15:28:01,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 448 [2022-11-25 15:28:01,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 368 transitions, 3725 flow. Second operand has 25 states, 25 states have (on average 167.28) internal successors, (4182), 25 states have internal predecessors, (4182), 0 states have call successors, (0), 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 15:28:01,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:28:01,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 448 [2022-11-25 15:28:01,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:28:11,289 INFO L130 PetriNetUnfolder]: 18461/29035 cut-off events. [2022-11-25 15:28:11,289 INFO L131 PetriNetUnfolder]: For 670522/670586 co-relation queries the response was YES. [2022-11-25 15:28:11,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192056 conditions, 29035 events. 18461/29035 cut-off events. For 670522/670586 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 208538 event pairs, 3135 based on Foata normal form. 380/26207 useless extension candidates. Maximal degree in co-relation 191995. Up to 14577 conditions per place. [2022-11-25 15:28:11,769 INFO L137 encePairwiseOnDemand]: 436/448 looper letters, 585 selfloop transitions, 357 changer transitions 0/944 dead transitions. [2022-11-25 15:28:11,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 944 transitions, 11266 flow [2022-11-25 15:28:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 15:28:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 15:28:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4882 transitions. [2022-11-25 15:28:11,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38919005102040816 [2022-11-25 15:28:11,780 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4882 transitions. [2022-11-25 15:28:11,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4882 transitions. [2022-11-25 15:28:11,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:28:11,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4882 transitions. [2022-11-25 15:28:11,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 174.35714285714286) internal successors, (4882), 28 states have internal predecessors, (4882), 0 states have call successors, (0), 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 15:28:11,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 448.0) internal successors, (12992), 29 states have internal predecessors, (12992), 0 states have call successors, (0), 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 15:28:11,819 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 448.0) internal successors, (12992), 29 states have internal predecessors, (12992), 0 states have call successors, (0), 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 15:28:11,819 INFO L175 Difference]: Start difference. First operand has 176 places, 368 transitions, 3725 flow. Second operand 28 states and 4882 transitions. [2022-11-25 15:28:11,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 944 transitions, 11266 flow [2022-11-25 15:28:17,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 944 transitions, 10348 flow, removed 454 selfloop flow, removed 4 redundant places. [2022-11-25 15:28:17,120 INFO L231 Difference]: Finished difference. Result has 212 places, 579 transitions, 6757 flow [2022-11-25 15:28:17,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6757, PETRI_PLACES=212, PETRI_TRANSITIONS=579} [2022-11-25 15:28:17,121 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 180 predicate places. [2022-11-25 15:28:17,121 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 579 transitions, 6757 flow [2022-11-25 15:28:17,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 167.28) internal successors, (4182), 25 states have internal predecessors, (4182), 0 states have call successors, (0), 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 15:28:17,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:28:17,123 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:28:17,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:28:17,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 15:28:17,324 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:28:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:28:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -893968437, now seen corresponding path program 4 times [2022-11-25 15:28:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:28:17,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942098793] [2022-11-25 15:28:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:28:17,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:28:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:28:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:28:19,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:28:19,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942098793] [2022-11-25 15:28:19,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942098793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:28:19,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148765985] [2022-11-25 15:28:19,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:28:19,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:28:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:28:19,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:28:19,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:28:20,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:28:20,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:28:20,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 15:28:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:28:20,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:28:20,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:28:20,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:28:20,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:28:20,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 15:28:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:28:20,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:28:21,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:28:21,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 81 [2022-11-25 15:28:21,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2022-11-25 15:28:21,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2022-11-25 15:28:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:28:21,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148765985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:28:21,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:28:21,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2022-11-25 15:28:21,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934896724] [2022-11-25 15:28:21,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:28:21,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 15:28:21,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:28:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 15:28:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=815, Unknown=3, NotChecked=0, Total=930 [2022-11-25 15:28:23,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 448 [2022-11-25 15:28:23,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 579 transitions, 6757 flow. Second operand has 31 states, 31 states have (on average 139.06451612903226) internal successors, (4311), 31 states have internal predecessors, (4311), 0 states have call successors, (0), 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 15:28:23,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:28:23,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 448 [2022-11-25 15:28:23,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:28:42,876 INFO L130 PetriNetUnfolder]: 25074/38985 cut-off events. [2022-11-25 15:28:42,877 INFO L131 PetriNetUnfolder]: For 1027582/1027646 co-relation queries the response was YES. [2022-11-25 15:28:43,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269760 conditions, 38985 events. 25074/38985 cut-off events. For 1027582/1027646 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 284423 event pairs, 4638 based on Foata normal form. 474/34972 useless extension candidates. Maximal degree in co-relation 269688. Up to 19157 conditions per place. [2022-11-25 15:28:43,660 INFO L137 encePairwiseOnDemand]: 436/448 looper letters, 669 selfloop transitions, 603 changer transitions 238/1512 dead transitions. [2022-11-25 15:28:43,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 1512 transitions, 18988 flow [2022-11-25 15:28:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 15:28:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-25 15:28:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6274 transitions. [2022-11-25 15:28:43,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32568521594684385 [2022-11-25 15:28:43,683 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6274 transitions. [2022-11-25 15:28:43,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6274 transitions. [2022-11-25 15:28:43,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:28:43,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6274 transitions. [2022-11-25 15:28:43,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 145.90697674418604) internal successors, (6274), 43 states have internal predecessors, (6274), 0 states have call successors, (0), 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 15:28:43,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 448.0) internal successors, (19712), 44 states have internal predecessors, (19712), 0 states have call successors, (0), 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 15:28:43,734 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 448.0) internal successors, (19712), 44 states have internal predecessors, (19712), 0 states have call successors, (0), 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 15:28:43,734 INFO L175 Difference]: Start difference. First operand has 212 places, 579 transitions, 6757 flow. Second operand 43 states and 6274 transitions. [2022-11-25 15:28:43,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 1512 transitions, 18988 flow [2022-11-25 15:28:55,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1512 transitions, 18817 flow, removed 59 selfloop flow, removed 10 redundant places. [2022-11-25 15:28:55,709 INFO L231 Difference]: Finished difference. Result has 268 places, 871 transitions, 12462 flow [2022-11-25 15:28:55,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=6615, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=12462, PETRI_PLACES=268, PETRI_TRANSITIONS=871} [2022-11-25 15:28:55,710 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 236 predicate places. [2022-11-25 15:28:55,710 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 871 transitions, 12462 flow [2022-11-25 15:28:55,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 139.06451612903226) internal successors, (4311), 31 states have internal predecessors, (4311), 0 states have call successors, (0), 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 15:28:55,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:28:55,711 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:28:55,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:28:55,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 15:28:55,912 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:28:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:28:55,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1849912036, now seen corresponding path program 2 times [2022-11-25 15:28:55,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:28:55,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292889376] [2022-11-25 15:28:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:28:55,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:28:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:28:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:28:56,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:28:56,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292889376] [2022-11-25 15:28:56,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292889376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:28:56,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647249818] [2022-11-25 15:28:56,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:28:56,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:28:56,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:28:56,095 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:28:56,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:28:56,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:28:56,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:28:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:28:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:28:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:28:56,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:28:56,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647249818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:28:56,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:28:56,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-25 15:28:56,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958085128] [2022-11-25 15:28:56,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:28:56,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:28:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:28:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:28:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:28:56,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 448 [2022-11-25 15:28:56,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 871 transitions, 12462 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 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 15:28:56,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:28:56,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 448 [2022-11-25 15:28:56,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:29:11,222 INFO L130 PetriNetUnfolder]: 23573/36261 cut-off events. [2022-11-25 15:29:11,222 INFO L131 PetriNetUnfolder]: For 1080496/1080552 co-relation queries the response was YES. [2022-11-25 15:29:11,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291764 conditions, 36261 events. 23573/36261 cut-off events. For 1080496/1080552 co-relation queries the response was YES. Maximal size of possible extension queue 1383. Compared 257427 event pairs, 8694 based on Foata normal form. 283/33649 useless extension candidates. Maximal degree in co-relation 291668. Up to 32115 conditions per place. [2022-11-25 15:29:12,048 INFO L137 encePairwiseOnDemand]: 444/448 looper letters, 798 selfloop transitions, 72 changer transitions 57/929 dead transitions. [2022-11-25 15:29:12,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 929 transitions, 15548 flow [2022-11-25 15:29:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:29:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:29:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 842 transitions. [2022-11-25 15:29:12,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46986607142857145 [2022-11-25 15:29:12,053 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 842 transitions. [2022-11-25 15:29:12,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 842 transitions. [2022-11-25 15:29:12,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:29:12,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 842 transitions. [2022-11-25 15:29:12,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 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 15:29:12,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 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 15:29:12,061 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 448.0) internal successors, (2240), 5 states have internal predecessors, (2240), 0 states have call successors, (0), 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 15:29:12,061 INFO L175 Difference]: Start difference. First operand has 268 places, 871 transitions, 12462 flow. Second operand 4 states and 842 transitions. [2022-11-25 15:29:12,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 929 transitions, 15548 flow [2022-11-25 15:29:30,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 929 transitions, 14727 flow, removed 383 selfloop flow, removed 19 redundant places. [2022-11-25 15:29:30,370 INFO L231 Difference]: Finished difference. Result has 244 places, 807 transitions, 11039 flow [2022-11-25 15:29:30,371 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=11209, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=11039, PETRI_PLACES=244, PETRI_TRANSITIONS=807} [2022-11-25 15:29:30,371 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 212 predicate places. [2022-11-25 15:29:30,371 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 807 transitions, 11039 flow [2022-11-25 15:29:30,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 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 15:29:30,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:29:30,372 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:30,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:29:30,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:30,575 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:29:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:30,575 INFO L85 PathProgramCache]: Analyzing trace with hash 877959551, now seen corresponding path program 5 times [2022-11-25 15:29:30,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:30,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593593768] [2022-11-25 15:29:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:30,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:29:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:29:31,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:29:31,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593593768] [2022-11-25 15:29:31,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593593768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:31,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234924716] [2022-11-25 15:29:31,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:29:31,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:31,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:29:32,000 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:29:32,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:29:32,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:29:32,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:29:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 15:29:32,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:29:32,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 15:29:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:29:32,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:29:32,391 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 15:29:32,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-25 15:29:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:29:32,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234924716] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:29:32,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:29:32,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12, 5] total 18 [2022-11-25 15:29:32,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106831303] [2022-11-25 15:29:32,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:29:32,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:29:32,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:29:32,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:29:32,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:29:32,497 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 448 [2022-11-25 15:29:32,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 807 transitions, 11039 flow. Second operand has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 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 15:29:32,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:29:32,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 448 [2022-11-25 15:29:32,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:29:45,105 INFO L130 PetriNetUnfolder]: 23665/36179 cut-off events. [2022-11-25 15:29:45,105 INFO L131 PetriNetUnfolder]: For 1060540/1060580 co-relation queries the response was YES. [2022-11-25 15:29:45,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290699 conditions, 36179 events. 23665/36179 cut-off events. For 1060540/1060580 co-relation queries the response was YES. Maximal size of possible extension queue 1352. Compared 253600 event pairs, 6735 based on Foata normal form. 76/33412 useless extension candidates. Maximal degree in co-relation 290610. Up to 22026 conditions per place. [2022-11-25 15:29:45,791 INFO L137 encePairwiseOnDemand]: 441/448 looper letters, 529 selfloop transitions, 400 changer transitions 0/931 dead transitions. [2022-11-25 15:29:45,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 931 transitions, 14189 flow [2022-11-25 15:29:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:29:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:29:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 978 transitions. [2022-11-25 15:29:45,794 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43660714285714286 [2022-11-25 15:29:45,794 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 978 transitions. [2022-11-25 15:29:45,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 978 transitions. [2022-11-25 15:29:45,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:29:45,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 978 transitions. [2022-11-25 15:29:45,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.6) internal successors, (978), 5 states have internal predecessors, (978), 0 states have call successors, (0), 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 15:29:45,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 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 15:29:45,800 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 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 15:29:45,801 INFO L175 Difference]: Start difference. First operand has 244 places, 807 transitions, 11039 flow. Second operand 5 states and 978 transitions. [2022-11-25 15:29:45,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 931 transitions, 14189 flow [2022-11-25 15:29:59,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 931 transitions, 13944 flow, removed 116 selfloop flow, removed 8 redundant places. [2022-11-25 15:29:59,631 INFO L231 Difference]: Finished difference. Result has 223 places, 822 transitions, 12634 flow [2022-11-25 15:29:59,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=10833, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12634, PETRI_PLACES=223, PETRI_TRANSITIONS=822} [2022-11-25 15:29:59,633 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 191 predicate places. [2022-11-25 15:29:59,633 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 822 transitions, 12634 flow [2022-11-25 15:29:59,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 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 15:29:59,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:29:59,634 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:29:59,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 15:29:59,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:29:59,841 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:29:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:29:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash 787389115, now seen corresponding path program 6 times [2022-11-25 15:29:59,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:29:59,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534472853] [2022-11-25 15:29:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:29:59,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:29:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:30:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:30:01,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:01,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534472853] [2022-11-25 15:30:01,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534472853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:30:01,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423621412] [2022-11-25 15:30:01,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:30:01,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:30:01,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:30:01,466 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:30:01,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaaac231-90fe-4354-881f-6f4818f0061b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:30:01,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:30:01,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:30:01,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 15:30:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:30:02,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:30:02,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:30:02,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 15:30:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:30:02,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:30:02,365 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_730 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_730) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2022-11-25 15:30:02,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:30:02,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-25 15:30:02,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-25 15:30:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:30:02,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423621412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:30:02,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:30:02,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 21 [2022-11-25 15:30:02,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789607370] [2022-11-25 15:30:02,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:02,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 15:30:02,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:02,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 15:30:02,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=371, Unknown=1, NotChecked=38, Total=462 [2022-11-25 15:30:02,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 448 [2022-11-25 15:30:02,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 822 transitions, 12634 flow. Second operand has 22 states, 22 states have (on average 149.77272727272728) internal successors, (3295), 22 states have internal predecessors, (3295), 0 states have call successors, (0), 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 15:30:02,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:30:02,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 448 [2022-11-25 15:30:02,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand