./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro --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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --- 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-8393723 [2022-11-18 19:58:54,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:58:54,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:58:54,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:58:54,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:58:54,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:58:54,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:58:54,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:58:54,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:58:54,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:58:54,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:58:54,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:58:54,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:58:54,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:58:54,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:58:54,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:58:54,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:58:54,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:58:54,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:58:54,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:58:54,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:58:54,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:58:54,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:58:54,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:58:54,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:58:54,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:58:54,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:58:54,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:58:54,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:58:54,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:58:54,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:58:54,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:58:54,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:58:54,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:58:54,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:58:54,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:58:54,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:58:54,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:58:54,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:58:54,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:58:54,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:58:54,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:58:54,991 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:58:54,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:58:54,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:58:54,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:58:54,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:58:54,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:58:54,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:58:54,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:58:54,995 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:58:54,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:58:54,996 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:58:54,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:58:54,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:58:54,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:58:54,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:58:54,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:58:54,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:58:54,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:58:54,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:58:54,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:58:54,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:58:55,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:58:55,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:58:55,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:58:55,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:58:55,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:58:55,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:58:55,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:58:55,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:58:55,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:58:55,004 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:58:55,005 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:58:55,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:58:55,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e [2022-11-18 19:58:55,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:58:55,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:58:55,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:58:55,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:58:55,327 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:58:55,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-11-18 19:58:55,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/data/3b5572f96/1e42e12b2af74c189d5c1d0481457c48/FLAG87c883f35 [2022-11-18 19:58:55,840 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:58:55,841 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-11-18 19:58:55,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/data/3b5572f96/1e42e12b2af74c189d5c1d0481457c48/FLAG87c883f35 [2022-11-18 19:58:56,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/data/3b5572f96/1e42e12b2af74c189d5c1d0481457c48 [2022-11-18 19:58:56,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:58:56,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:58:56,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:58:56,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:58:56,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:58:56,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@95e122b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56, skipping insertion in model container [2022-11-18 19:58:56,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:58:56,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:58:56,457 WARN L234 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_91bb7da1-57c2-4af4-bb67-63cb2e636898/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-11-18 19:58:56,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:58:56,475 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:58:56,496 WARN L234 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_91bb7da1-57c2-4af4-bb67-63cb2e636898/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-11-18 19:58:56,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:58:56,514 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:58:56,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56 WrapperNode [2022-11-18 19:58:56,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:58:56,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:58:56,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:58:56,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:58:56,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,556 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 154 [2022-11-18 19:58:56,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:58:56,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:58:56,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:58:56,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:58:56,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,584 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:58:56,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:58:56,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:58:56,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:58:56,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (1/1) ... [2022-11-18 19:58:56,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:58:56,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:58:56,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:58:56,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:58:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:58:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:58:56,673 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:58:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:58:56,674 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:58:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:58:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:58:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:58:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:58:56,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:58:56,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:58:56,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:58:56,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:58:56,677 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:58:56,773 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:58:56,775 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:58:57,177 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:58:57,188 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:58:57,189 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 19:58:57,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:58:57 BoogieIcfgContainer [2022-11-18 19:58:57,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:58:57,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:58:57,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:58:57,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:58:57,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:58:56" (1/3) ... [2022-11-18 19:58:57,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf7a3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:58:57, skipping insertion in model container [2022-11-18 19:58:57,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:56" (2/3) ... [2022-11-18 19:58:57,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf7a3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:58:57, skipping insertion in model container [2022-11-18 19:58:57,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:58:57" (3/3) ... [2022-11-18 19:58:57,215 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2022-11-18 19:58:57,224 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:58:57,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:58:57,235 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:58:57,235 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:58:57,342 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:58:57,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 414 flow [2022-11-18 19:58:57,519 INFO L130 PetriNetUnfolder]: 16/197 cut-off events. [2022-11-18 19:58:57,527 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:58:57,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 197 events. 16/197 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 170 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-11-18 19:58:57,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 199 transitions, 414 flow [2022-11-18 19:58:57,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 188 transitions, 388 flow [2022-11-18 19:58:57,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:58:57,580 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;@425ba5d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:58:57,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 19:58:57,628 INFO L130 PetriNetUnfolder]: 13/155 cut-off events. [2022-11-18 19:58:57,628 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:58:57,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:57,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:57,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:58:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash 82944432, now seen corresponding path program 1 times [2022-11-18 19:58:57,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:57,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707030996] [2022-11-18 19:58:57,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:57,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:58:57,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707030996] [2022-11-18 19:58:57,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707030996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:58:57,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:58:57,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:58:57,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565591143] [2022-11-18 19:58:57,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:58:57,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:58:57,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:58:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:58:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:58:57,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 199 [2022-11-18 19:58:57,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 188 transitions, 388 flow. Second operand has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:57,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:58:57,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 199 [2022-11-18 19:58:57,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:58,067 INFO L130 PetriNetUnfolder]: 3/175 cut-off events. [2022-11-18 19:58:58,068 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 19:58:58,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 175 events. 3/175 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 16/178 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-11-18 19:58:58,071 INFO L137 encePairwiseOnDemand]: 186/199 looper letters, 4 selfloop transitions, 0 changer transitions 5/175 dead transitions. [2022-11-18 19:58:58,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 175 transitions, 370 flow [2022-11-18 19:58:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:58:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:58:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 379 transitions. [2022-11-18 19:58:58,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9522613065326633 [2022-11-18 19:58:58,087 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 379 transitions. [2022-11-18 19:58:58,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 379 transitions. [2022-11-18 19:58:58,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:58,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 379 transitions. [2022-11-18 19:58:58,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 189.5) internal successors, (379), 2 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,101 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,103 INFO L175 Difference]: Start difference. First operand has 179 places, 188 transitions, 388 flow. Second operand 2 states and 379 transitions. [2022-11-18 19:58:58,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 175 transitions, 370 flow [2022-11-18 19:58:58,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 175 transitions, 362 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 19:58:58,113 INFO L231 Difference]: Finished difference. Result has 176 places, 170 transitions, 344 flow [2022-11-18 19:58:58,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=176, PETRI_TRANSITIONS=170} [2022-11-18 19:58:58,118 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, -3 predicate places. [2022-11-18 19:58:58,119 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 170 transitions, 344 flow [2022-11-18 19:58:58,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:58,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:58,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:58:58,120 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:58:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash -944083145, now seen corresponding path program 1 times [2022-11-18 19:58:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:58,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035176617] [2022-11-18 19:58:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:58,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:58:58,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:58:58,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035176617] [2022-11-18 19:58:58,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035176617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:58:58,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:58:58,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:58:58,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518808002] [2022-11-18 19:58:58,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:58:58,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:58:58,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:58:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:58:58,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:58:58,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 199 [2022-11-18 19:58:58,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 170 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:58:58,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 199 [2022-11-18 19:58:58,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:58,910 INFO L130 PetriNetUnfolder]: 22/292 cut-off events. [2022-11-18 19:58:58,910 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-18 19:58:58,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 292 events. 22/292 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 632 event pairs, 9 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 368. Up to 61 conditions per place. [2022-11-18 19:58:58,914 INFO L137 encePairwiseOnDemand]: 191/199 looper letters, 38 selfloop transitions, 7 changer transitions 0/174 dead transitions. [2022-11-18 19:58:58,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 174 transitions, 442 flow [2022-11-18 19:58:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:58:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 19:58:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1158 transitions. [2022-11-18 19:58:58,921 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7273869346733668 [2022-11-18 19:58:58,921 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1158 transitions. [2022-11-18 19:58:58,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1158 transitions. [2022-11-18 19:58:58,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:58,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1158 transitions. [2022-11-18 19:58:58,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.75) internal successors, (1158), 8 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,935 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,935 INFO L175 Difference]: Start difference. First operand has 176 places, 170 transitions, 344 flow. Second operand 8 states and 1158 transitions. [2022-11-18 19:58:58,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 174 transitions, 442 flow [2022-11-18 19:58:58,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 174 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:58:58,940 INFO L231 Difference]: Finished difference. Result has 179 places, 171 transitions, 366 flow [2022-11-18 19:58:58,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=366, PETRI_PLACES=179, PETRI_TRANSITIONS=171} [2022-11-18 19:58:58,942 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, 0 predicate places. [2022-11-18 19:58:58,942 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 171 transitions, 366 flow [2022-11-18 19:58:58,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:58,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:58,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:58,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:58:58,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:58:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:58,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1955240030, now seen corresponding path program 1 times [2022-11-18 19:58:58,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:58,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423061285] [2022-11-18 19:58:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:58,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:58:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:58:59,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:58:59,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423061285] [2022-11-18 19:58:59,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423061285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:58:59,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:58:59,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:58:59,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383780882] [2022-11-18 19:58:59,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:58:59,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:58:59,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:58:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:58:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:58:59,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 199 [2022-11-18 19:58:59,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 171 transitions, 366 flow. Second operand has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:59,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:58:59,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 199 [2022-11-18 19:58:59,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:58:59,637 INFO L130 PetriNetUnfolder]: 121/786 cut-off events. [2022-11-18 19:58:59,637 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-18 19:58:59,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 786 events. 121/786 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4212 event pairs, 38 based on Foata normal form. 1/731 useless extension candidates. Maximal degree in co-relation 1073. Up to 133 conditions per place. [2022-11-18 19:58:59,646 INFO L137 encePairwiseOnDemand]: 192/199 looper letters, 65 selfloop transitions, 5 changer transitions 4/204 dead transitions. [2022-11-18 19:58:59,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 204 transitions, 585 flow [2022-11-18 19:58:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:58:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:58:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 909 transitions. [2022-11-18 19:58:59,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7613065326633166 [2022-11-18 19:58:59,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 909 transitions. [2022-11-18 19:58:59,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 909 transitions. [2022-11-18 19:58:59,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:58:59,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 909 transitions. [2022-11-18 19:58:59,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:59,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:59,660 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:59,660 INFO L175 Difference]: Start difference. First operand has 179 places, 171 transitions, 366 flow. Second operand 6 states and 909 transitions. [2022-11-18 19:58:59,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 204 transitions, 585 flow [2022-11-18 19:58:59,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 204 transitions, 573 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 19:58:59,669 INFO L231 Difference]: Finished difference. Result has 181 places, 174 transitions, 383 flow [2022-11-18 19:58:59,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=181, PETRI_TRANSITIONS=174} [2022-11-18 19:58:59,672 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, 2 predicate places. [2022-11-18 19:58:59,673 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 174 transitions, 383 flow [2022-11-18 19:58:59,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:58:59,674 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:58:59,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:58:59,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:58:59,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:58:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:58:59,676 INFO L85 PathProgramCache]: Analyzing trace with hash 845673823, now seen corresponding path program 1 times [2022-11-18 19:58:59,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:58:59,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305160400] [2022-11-18 19:58:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:58:59,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:58:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305160400] [2022-11-18 19:59:00,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305160400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971369007] [2022-11-18 19:59:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:00,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:00,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:00,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:00,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:59:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:59:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:00,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:00,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971369007] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:00,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:00,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-11-18 19:59:00,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67430853] [2022-11-18 19:59:00,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:00,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:00,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:59:00,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 199 [2022-11-18 19:59:00,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 174 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:00,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:00,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 199 [2022-11-18 19:59:00,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:00,813 INFO L130 PetriNetUnfolder]: 112/822 cut-off events. [2022-11-18 19:59:00,814 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 19:59:00,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 822 events. 112/822 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4293 event pairs, 13 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 1081. Up to 143 conditions per place. [2022-11-18 19:59:00,844 INFO L137 encePairwiseOnDemand]: 194/199 looper letters, 26 selfloop transitions, 5 changer transitions 1/186 dead transitions. [2022-11-18 19:59:00,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 186 transitions, 475 flow [2022-11-18 19:59:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:59:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 693 transitions. [2022-11-18 19:59:00,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8706030150753769 [2022-11-18 19:59:00,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 693 transitions. [2022-11-18 19:59:00,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 693 transitions. [2022-11-18 19:59:00,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:00,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 693 transitions. [2022-11-18 19:59:00,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:00,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:00,852 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:00,852 INFO L175 Difference]: Start difference. First operand has 181 places, 174 transitions, 383 flow. Second operand 4 states and 693 transitions. [2022-11-18 19:59:00,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 186 transitions, 475 flow [2022-11-18 19:59:00,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 186 transitions, 471 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 19:59:00,858 INFO L231 Difference]: Finished difference. Result has 183 places, 178 transitions, 415 flow [2022-11-18 19:59:00,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=415, PETRI_PLACES=183, PETRI_TRANSITIONS=178} [2022-11-18 19:59:00,859 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, 4 predicate places. [2022-11-18 19:59:00,860 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 178 transitions, 415 flow [2022-11-18 19:59:00,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:00,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:00,861 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:00,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:01,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:01,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:59:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:01,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1143893809, now seen corresponding path program 2 times [2022-11-18 19:59:01,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:01,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766318359] [2022-11-18 19:59:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:01,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:01,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:01,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766318359] [2022-11-18 19:59:01,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766318359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:01,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:01,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:59:01,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232329308] [2022-11-18 19:59:01,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:01,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:01,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:59:01,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 199 [2022-11-18 19:59:01,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 178 transitions, 415 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:01,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:01,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 199 [2022-11-18 19:59:01,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:01,470 INFO L130 PetriNetUnfolder]: 128/916 cut-off events. [2022-11-18 19:59:01,470 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2022-11-18 19:59:01,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 916 events. 128/916 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4749 event pairs, 46 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 1356. Up to 189 conditions per place. [2022-11-18 19:59:01,477 INFO L137 encePairwiseOnDemand]: 193/199 looper letters, 29 selfloop transitions, 6 changer transitions 0/189 dead transitions. [2022-11-18 19:59:01,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 189 transitions, 526 flow [2022-11-18 19:59:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:59:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:59:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 856 transitions. [2022-11-18 19:59:01,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8603015075376884 [2022-11-18 19:59:01,480 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 856 transitions. [2022-11-18 19:59:01,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 856 transitions. [2022-11-18 19:59:01,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:01,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 856 transitions. [2022-11-18 19:59:01,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:01,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:01,486 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:01,486 INFO L175 Difference]: Start difference. First operand has 183 places, 178 transitions, 415 flow. Second operand 5 states and 856 transitions. [2022-11-18 19:59:01,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 189 transitions, 526 flow [2022-11-18 19:59:01,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 189 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:59:01,493 INFO L231 Difference]: Finished difference. Result has 189 places, 180 transitions, 450 flow [2022-11-18 19:59:01,494 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=450, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-11-18 19:59:01,496 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, 10 predicate places. [2022-11-18 19:59:01,497 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 450 flow [2022-11-18 19:59:01,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:01,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:01,497 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:01,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:59:01,498 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:59:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash -361096665, now seen corresponding path program 3 times [2022-11-18 19:59:01,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:01,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196881021] [2022-11-18 19:59:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:01,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:01,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:01,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196881021] [2022-11-18 19:59:01,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196881021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115656102] [2022-11-18 19:59:01,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:59:01,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:01,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:01,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:01,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:59:01,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:59:01,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:01,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:59:01,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:02,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:02,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115656102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:02,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:59:02,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-18 19:59:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516398918] [2022-11-18 19:59:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:02,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:02,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:02,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:59:02,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 199 [2022-11-18 19:59:02,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 450 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:02,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 199 [2022-11-18 19:59:02,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:02,327 INFO L130 PetriNetUnfolder]: 127/908 cut-off events. [2022-11-18 19:59:02,327 INFO L131 PetriNetUnfolder]: For 364/364 co-relation queries the response was YES. [2022-11-18 19:59:02,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 908 events. 127/908 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4672 event pairs, 26 based on Foata normal form. 4/861 useless extension candidates. Maximal degree in co-relation 1434. Up to 190 conditions per place. [2022-11-18 19:59:02,335 INFO L137 encePairwiseOnDemand]: 194/199 looper letters, 28 selfloop transitions, 7 changer transitions 2/191 dead transitions. [2022-11-18 19:59:02,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 569 flow [2022-11-18 19:59:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:59:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 693 transitions. [2022-11-18 19:59:02,337 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8706030150753769 [2022-11-18 19:59:02,338 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 693 transitions. [2022-11-18 19:59:02,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 693 transitions. [2022-11-18 19:59:02,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:02,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 693 transitions. [2022-11-18 19:59:02,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,345 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,345 INFO L175 Difference]: Start difference. First operand has 189 places, 180 transitions, 450 flow. Second operand 4 states and 693 transitions. [2022-11-18 19:59:02,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 569 flow [2022-11-18 19:59:02,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 191 transitions, 556 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-18 19:59:02,354 INFO L231 Difference]: Finished difference. Result has 191 places, 182 transitions, 475 flow [2022-11-18 19:59:02,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=475, PETRI_PLACES=191, PETRI_TRANSITIONS=182} [2022-11-18 19:59:02,361 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, 12 predicate places. [2022-11-18 19:59:02,362 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 182 transitions, 475 flow [2022-11-18 19:59:02,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:02,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:02,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:02,575 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:59:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash -381328414, now seen corresponding path program 1 times [2022-11-18 19:59:02,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:02,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341963202] [2022-11-18 19:59:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:02,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:02,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:02,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341963202] [2022-11-18 19:59:02,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341963202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:02,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:02,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:59:02,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321968214] [2022-11-18 19:59:02,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:02,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:02,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:02,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:02,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:59:02,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 199 [2022-11-18 19:59:02,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 182 transitions, 475 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:02,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 199 [2022-11-18 19:59:02,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:02,976 INFO L130 PetriNetUnfolder]: 60/707 cut-off events. [2022-11-18 19:59:02,977 INFO L131 PetriNetUnfolder]: For 279/302 co-relation queries the response was YES. [2022-11-18 19:59:02,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 707 events. 60/707 cut-off events. For 279/302 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3143 event pairs, 9 based on Foata normal form. 21/683 useless extension candidates. Maximal degree in co-relation 1059. Up to 79 conditions per place. [2022-11-18 19:59:02,983 INFO L137 encePairwiseOnDemand]: 193/199 looper letters, 27 selfloop transitions, 5 changer transitions 1/195 dead transitions. [2022-11-18 19:59:02,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 195 transitions, 599 flow [2022-11-18 19:59:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:59:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:59:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 881 transitions. [2022-11-18 19:59:02,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8854271356783919 [2022-11-18 19:59:02,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 881 transitions. [2022-11-18 19:59:02,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 881 transitions. [2022-11-18 19:59:02,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:02,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 881 transitions. [2022-11-18 19:59:02,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,993 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:02,993 INFO L175 Difference]: Start difference. First operand has 191 places, 182 transitions, 475 flow. Second operand 5 states and 881 transitions. [2022-11-18 19:59:02,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 195 transitions, 599 flow [2022-11-18 19:59:02,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 195 transitions, 587 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-18 19:59:03,000 INFO L231 Difference]: Finished difference. Result has 193 places, 184 transitions, 489 flow [2022-11-18 19:59:03,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=489, PETRI_PLACES=193, PETRI_TRANSITIONS=184} [2022-11-18 19:59:03,002 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, 14 predicate places. [2022-11-18 19:59:03,002 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 184 transitions, 489 flow [2022-11-18 19:59:03,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:03,003 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:03,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:03,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:59:03,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:59:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:03,004 INFO L85 PathProgramCache]: Analyzing trace with hash 590568678, now seen corresponding path program 2 times [2022-11-18 19:59:03,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:03,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211794053] [2022-11-18 19:59:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:03,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:03,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:03,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211794053] [2022-11-18 19:59:03,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211794053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:03,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84893503] [2022-11-18 19:59:03,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:59:03,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:03,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:03,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:03,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:59:03,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:59:03,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:03,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:59:03,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:04,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:04,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84893503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:04,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:59:04,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 14 [2022-11-18 19:59:04,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415560220] [2022-11-18 19:59:04,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:04,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:04,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:04,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:04,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:59:04,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 199 [2022-11-18 19:59:04,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 184 transitions, 489 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:04,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:04,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 199 [2022-11-18 19:59:04,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:04,478 INFO L130 PetriNetUnfolder]: 62/714 cut-off events. [2022-11-18 19:59:04,478 INFO L131 PetriNetUnfolder]: For 341/366 co-relation queries the response was YES. [2022-11-18 19:59:04,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 714 events. 62/714 cut-off events. For 341/366 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3203 event pairs, 10 based on Foata normal form. 20/688 useless extension candidates. Maximal degree in co-relation 1130. Up to 80 conditions per place. [2022-11-18 19:59:04,484 INFO L137 encePairwiseOnDemand]: 194/199 looper letters, 28 selfloop transitions, 7 changer transitions 0/197 dead transitions. [2022-11-18 19:59:04,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 197 transitions, 631 flow [2022-11-18 19:59:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:59:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2022-11-18 19:59:04,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8944723618090452 [2022-11-18 19:59:04,487 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2022-11-18 19:59:04,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2022-11-18 19:59:04,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:04,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2022-11-18 19:59:04,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:04,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:04,494 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:04,495 INFO L175 Difference]: Start difference. First operand has 193 places, 184 transitions, 489 flow. Second operand 4 states and 712 transitions. [2022-11-18 19:59:04,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 197 transitions, 631 flow [2022-11-18 19:59:04,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 197 transitions, 625 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 19:59:04,500 INFO L231 Difference]: Finished difference. Result has 196 places, 187 transitions, 542 flow [2022-11-18 19:59:04,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=196, PETRI_TRANSITIONS=187} [2022-11-18 19:59:04,504 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, 17 predicate places. [2022-11-18 19:59:04,504 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 187 transitions, 542 flow [2022-11-18 19:59:04,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:04,505 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:04,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:04,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:04,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:04,711 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:59:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:04,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1228874000, now seen corresponding path program 3 times [2022-11-18 19:59:04,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:04,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719313431] [2022-11-18 19:59:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:04,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:05,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:05,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719313431] [2022-11-18 19:59:05,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719313431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:05,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152476412] [2022-11-18 19:59:05,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:59:05,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:05,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:05,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:05,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:59:05,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:59:05,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:59:05,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:06,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:06,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152476412] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:06,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:06,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14, 5] total 16 [2022-11-18 19:59:06,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326541054] [2022-11-18 19:59:06,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:06,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:06,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:59:06,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 199 [2022-11-18 19:59:06,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 187 transitions, 542 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:06,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:06,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 199 [2022-11-18 19:59:06,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:06,459 INFO L130 PetriNetUnfolder]: 64/845 cut-off events. [2022-11-18 19:59:06,459 INFO L131 PetriNetUnfolder]: For 529/551 co-relation queries the response was YES. [2022-11-18 19:59:06,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 845 events. 64/845 cut-off events. For 529/551 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3831 event pairs, 11 based on Foata normal form. 22/813 useless extension candidates. Maximal degree in co-relation 1329. Up to 63 conditions per place. [2022-11-18 19:59:06,465 INFO L137 encePairwiseOnDemand]: 194/199 looper letters, 23 selfloop transitions, 9 changer transitions 2/196 dead transitions. [2022-11-18 19:59:06,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 196 transitions, 663 flow [2022-11-18 19:59:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:59:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 709 transitions. [2022-11-18 19:59:06,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8907035175879398 [2022-11-18 19:59:06,468 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 709 transitions. [2022-11-18 19:59:06,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 709 transitions. [2022-11-18 19:59:06,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:06,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 709 transitions. [2022-11-18 19:59:06,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:06,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:06,472 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:06,473 INFO L175 Difference]: Start difference. First operand has 196 places, 187 transitions, 542 flow. Second operand 4 states and 709 transitions. [2022-11-18 19:59:06,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 196 transitions, 663 flow [2022-11-18 19:59:06,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 196 transitions, 652 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-18 19:59:06,480 INFO L231 Difference]: Finished difference. Result has 199 places, 188 transitions, 569 flow [2022-11-18 19:59:06,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=569, PETRI_PLACES=199, PETRI_TRANSITIONS=188} [2022-11-18 19:59:06,481 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, 20 predicate places. [2022-11-18 19:59:06,481 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 188 transitions, 569 flow [2022-11-18 19:59:06,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:06,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:06,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:06,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:06,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:06,689 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:59:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1662493701, now seen corresponding path program 1 times [2022-11-18 19:59:06,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:06,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443196278] [2022-11-18 19:59:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:06,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:07,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:07,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443196278] [2022-11-18 19:59:07,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443196278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173034869] [2022-11-18 19:59:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:07,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:07,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:07,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:07,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:59:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 19:59:07,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:09,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:59:09,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:59:09,205 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 17 treesize of output 10 [2022-11-18 19:59:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:09,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:10,259 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 19:59:10,259 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 19 treesize of output 11 [2022-11-18 19:59:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:11,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173034869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:11,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:59:11,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 18] total 48 [2022-11-18 19:59:11,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023841537] [2022-11-18 19:59:11,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:11,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 19:59:11,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:59:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 19:59:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 19:59:11,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 199 [2022-11-18 19:59:11,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 188 transitions, 569 flow. Second operand has 48 states, 48 states have (on average 75.91666666666667) internal successors, (3644), 48 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:11,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:59:11,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 199 [2022-11-18 19:59:11,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:59:55,834 INFO L130 PetriNetUnfolder]: 17999/36644 cut-off events. [2022-11-18 19:59:55,834 INFO L131 PetriNetUnfolder]: For 31043/31043 co-relation queries the response was YES. [2022-11-18 19:59:55,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85902 conditions, 36644 events. 17999/36644 cut-off events. For 31043/31043 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 322010 event pairs, 669 based on Foata normal form. 762/35608 useless extension candidates. Maximal degree in co-relation 85885. Up to 5982 conditions per place. [2022-11-18 19:59:56,102 INFO L137 encePairwiseOnDemand]: 128/199 looper letters, 2178 selfloop transitions, 824 changer transitions 687/3749 dead transitions. [2022-11-18 19:59:56,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 3749 transitions, 18709 flow [2022-11-18 19:59:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 393 states. [2022-11-18 19:59:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2022-11-18 19:59:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 31246 transitions. [2022-11-18 19:59:56,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3995294538852021 [2022-11-18 19:59:56,191 INFO L72 ComplementDD]: Start complementDD. Operand 393 states and 31246 transitions. [2022-11-18 19:59:56,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 393 states and 31246 transitions. [2022-11-18 19:59:56,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:59:56,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 393 states and 31246 transitions. [2022-11-18 19:59:56,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 394 states, 393 states have (on average 79.50636132315522) internal successors, (31246), 393 states have internal predecessors, (31246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:56,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 394 states, 394 states have (on average 199.0) internal successors, (78406), 394 states have internal predecessors, (78406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:56,432 INFO L81 ComplementDD]: Finished complementDD. Result has 394 states, 394 states have (on average 199.0) internal successors, (78406), 394 states have internal predecessors, (78406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:56,432 INFO L175 Difference]: Start difference. First operand has 199 places, 188 transitions, 569 flow. Second operand 393 states and 31246 transitions. [2022-11-18 19:59:56,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 3749 transitions, 18709 flow [2022-11-18 19:59:56,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 3749 transitions, 18084 flow, removed 135 selfloop flow, removed 5 redundant places. [2022-11-18 19:59:56,647 INFO L231 Difference]: Finished difference. Result has 887 places, 1076 transitions, 7880 flow [2022-11-18 19:59:56,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=393, PETRI_FLOW=7880, PETRI_PLACES=887, PETRI_TRANSITIONS=1076} [2022-11-18 19:59:56,649 INFO L288 CegarLoopForPetriNet]: 179 programPoint places, 708 predicate places. [2022-11-18 19:59:56,649 INFO L495 AbstractCegarLoop]: Abstraction has has 887 places, 1076 transitions, 7880 flow [2022-11-18 19:59:56,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 75.91666666666667) internal successors, (3644), 48 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:56,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:59:56,651 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:56,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:56,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:59:56,859 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:59:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2002435032, now seen corresponding path program 2 times [2022-11-18 19:59:56,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:59:56,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124972200] [2022-11-18 19:59:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:56,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:59:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:57,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:59:57,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124972200] [2022-11-18 19:59:57,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124972200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:59:57,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061815141] [2022-11-18 19:59:57,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:59:57,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:59:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:59:57,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:59:57,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bb7da1-57c2-4af4-bb67-63cb2e636898/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:59:57,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:59:57,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:57,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-18 19:59:57,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:57,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:59:57,669 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:59:57,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:59:57,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:59:58,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:59:58,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:59:59,377 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 19:59:59,378 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 23 treesize of output 10 [2022-11-18 19:59:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:59:59,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:01,466 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_205 (Array Int Int)) (v_ArrVal_204 (Array Int Int)) (~x1~0 Int) (~x2~0 Int)) (or (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_204) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_205) c_~f~0.base))) (= (select .cse0 (+ (* ~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* ~x2~0 4))))) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (< ~x2~0 0) (<= c_~size~0 ~x2~0))) is different from false [2022-11-18 20:00:01,863 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_205 (Array Int Int)) (v_ArrVal_204 (Array Int Int)) (~x1~0 Int) (~x2~0 Int)) (or (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_204) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_205) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (= (select .cse0 (+ (* ~x1~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) (select .cse0 (+ (* ~x2~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (< ~x2~0 0) (<= c_~size~0 ~x2~0))) is different from false [2022-11-18 20:00:04,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:00:04,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-11-18 20:00:04,045 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:00:04,046 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 198 treesize of output 173 [2022-11-18 20:00:04,057 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:00:04,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2022-11-18 20:00:04,070 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:00:04,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2022-11-18 20:00:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:00:04,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061815141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:04,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:00:04,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 29, 27] total 56 [2022-11-18 20:00:04,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604555806] [2022-11-18 20:00:04,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:04,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 20:00:04,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 20:00:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2541, Unknown=35, NotChecked=210, Total=3080 [2022-11-18 20:00:04,644 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 199 [2022-11-18 20:00:04,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 1076 transitions, 7880 flow. Second operand has 56 states, 56 states have (on average 74.21428571428571) internal successors, (4156), 56 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:04,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:00:04,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 199 [2022-11-18 20:00:04,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand