./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8 --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 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- 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-e04fb08 [2022-11-16 11:43:55,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:43:55,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:43:55,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:43:55,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:43:55,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:43:55,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:43:55,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:43:55,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:43:55,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:43:55,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:43:55,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:43:55,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:43:55,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:43:55,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:43:55,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:43:55,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:43:55,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:43:55,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:43:55,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:43:55,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:43:55,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:43:55,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:43:55,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:43:55,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:43:55,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:43:55,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:43:55,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:43:55,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:43:55,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:43:55,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:43:55,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:43:55,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:43:55,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:43:55,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:43:55,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:43:55,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:43:55,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:43:55,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:43:55,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:43:55,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:43:55,712 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:43:55,761 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:43:55,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:43:55,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:43:55,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:43:55,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:43:55,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:43:55,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:43:55,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:43:55,765 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:43:55,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:43:55,766 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:43:55,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:43:55,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:43:55,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:43:55,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:43:55,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:43:55,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:43:55,768 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:43:55,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:43:55,768 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:43:55,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:43:55,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:43:55,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:43:55,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:43:55,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:43:55,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:43:55,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:43:55,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:43:55,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:43:55,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:43:55,771 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:43:55,771 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:43:55,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:43:55,771 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_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2022-11-16 11:43:56,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:43:56,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:43:56,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:43:56,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:43:56,202 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:43:56,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-11-16 11:43:56,294 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/data/1c9ced08e/f6c484d1a62349faa6110ab6e2277a33/FLAG8a7859b85 [2022-11-16 11:43:57,046 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:43:57,051 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-11-16 11:43:57,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/data/1c9ced08e/f6c484d1a62349faa6110ab6e2277a33/FLAG8a7859b85 [2022-11-16 11:43:57,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/data/1c9ced08e/f6c484d1a62349faa6110ab6e2277a33 [2022-11-16 11:43:57,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:43:57,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:43:57,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:43:57,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:43:57,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:43:57,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:57,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a2e27ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57, skipping insertion in model container [2022-11-16 11:43:57,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:57,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:43:57,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:43:57,837 WARN L229 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_b8c41c0d-1392-4882-b6ef-bcebba4078c1/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2022-11-16 11:43:57,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:43:57,881 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:43:57,916 WARN L229 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_b8c41c0d-1392-4882-b6ef-bcebba4078c1/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2022-11-16 11:43:57,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:43:57,963 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:43:57,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57 WrapperNode [2022-11-16 11:43:57,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:43:57,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:43:57,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:43:57,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:43:57,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:57,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,020 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-11-16 11:43:58,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:43:58,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:43:58,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:43:58,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:43:58,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,048 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:43:58,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:43:58,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:43:58,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:43:58,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (1/1) ... [2022-11-16 11:43:58,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:43:58,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:58,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:43:58,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:43:58,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:43:58,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:43:58,157 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 11:43:58,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:43:58,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:43:58,158 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 11:43:58,158 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 11:43:58,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:43:58,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:43:58,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:43:58,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:43:58,165 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:43:58,371 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:43:58,374 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:43:58,799 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:43:58,811 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:43:58,814 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-16 11:43:58,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:43:58 BoogieIcfgContainer [2022-11-16 11:43:58,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:43:58,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:43:58,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:43:58,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:43:58,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:43:57" (1/3) ... [2022-11-16 11:43:58,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd76e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:43:58, skipping insertion in model container [2022-11-16 11:43:58,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:57" (2/3) ... [2022-11-16 11:43:58,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd76e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:43:58, skipping insertion in model container [2022-11-16 11:43:58,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:43:58" (3/3) ... [2022-11-16 11:43:58,833 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2022-11-16 11:43:58,844 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:43:58,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:43:58,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:43:58,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:43:58,995 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 11:43:59,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 242 flow [2022-11-16 11:43:59,190 INFO L130 PetriNetUnfolder]: 17/155 cut-off events. [2022-11-16 11:43:59,196 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 11:43:59,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 17/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 377 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2022-11-16 11:43:59,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 117 transitions, 242 flow [2022-11-16 11:43:59,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 229 flow [2022-11-16 11:43:59,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:43:59,277 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:43:59,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:43:59,328 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2022-11-16 11:43:59,332 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:43:59,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:59,334 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] [2022-11-16 11:43:59,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:59,342 INFO L85 PathProgramCache]: Analyzing trace with hash 179904248, now seen corresponding path program 1 times [2022-11-16 11:43:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:59,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60308717] [2022-11-16 11:43:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:59,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:59,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:59,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60308717] [2022-11-16 11:43:59,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60308717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:59,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:59,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:43:59,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498801460] [2022-11-16 11:43:59,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:59,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:43:59,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:59,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:43:59,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:43:59,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 117 [2022-11-16 11:43:59,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 229 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:59,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:59,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 117 [2022-11-16 11:43:59,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:43:59,862 INFO L130 PetriNetUnfolder]: 0/132 cut-off events. [2022-11-16 11:43:59,862 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 11:43:59,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 132 events. 0/132 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 211 event pairs, 0 based on Foata normal form. 16/142 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-16 11:43:59,865 INFO L137 encePairwiseOnDemand]: 106/117 looper letters, 1 selfloop transitions, 0 changer transitions 16/100 dead transitions. [2022-11-16 11:43:59,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 100 transitions, 207 flow [2022-11-16 11:43:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:43:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:43:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-11-16 11:43:59,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9316239316239316 [2022-11-16 11:43:59,885 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-11-16 11:43:59,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-11-16 11:43:59,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:43:59,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-11-16 11:43:59,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:59,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:59,909 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:59,912 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 229 flow. Second operand 2 states and 218 transitions. [2022-11-16 11:43:59,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 100 transitions, 207 flow [2022-11-16 11:43:59,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 207 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:43:59,924 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 173 flow [2022-11-16 11:43:59,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=173, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2022-11-16 11:43:59,934 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 0 predicate places. [2022-11-16 11:43:59,935 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 173 flow [2022-11-16 11:43:59,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:59,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:43:59,936 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] [2022-11-16 11:43:59,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:43:59,937 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:43:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:59,938 INFO L85 PathProgramCache]: Analyzing trace with hash 308986967, now seen corresponding path program 1 times [2022-11-16 11:43:59,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:59,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009384286] [2022-11-16 11:43:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:59,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:00,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:00,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009384286] [2022-11-16 11:44:00,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009384286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:00,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:00,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:00,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703638412] [2022-11-16 11:44:00,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:00,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:00,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:00,212 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 117 [2022-11-16 11:44:00,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:00,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 117 [2022-11-16 11:44:00,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:00,284 INFO L130 PetriNetUnfolder]: 0/88 cut-off events. [2022-11-16 11:44:00,285 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:00,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 88 events. 0/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-16 11:44:00,294 INFO L137 encePairwiseOnDemand]: 114/117 looper letters, 8 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-11-16 11:44:00,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 197 flow [2022-11-16 11:44:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2022-11-16 11:44:00,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8518518518518519 [2022-11-16 11:44:00,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2022-11-16 11:44:00,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2022-11-16 11:44:00,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:00,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2022-11-16 11:44:00,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,315 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 173 flow. Second operand 3 states and 299 transitions. [2022-11-16 11:44:00,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 197 flow [2022-11-16 11:44:00,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 86 transitions, 197 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:00,318 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 181 flow [2022-11-16 11:44:00,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2022-11-16 11:44:00,320 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, -13 predicate places. [2022-11-16 11:44:00,321 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 181 flow [2022-11-16 11:44:00,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:00,322 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:00,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:44:00,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:00,325 INFO L85 PathProgramCache]: Analyzing trace with hash 111934326, now seen corresponding path program 1 times [2022-11-16 11:44:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:00,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931388595] [2022-11-16 11:44:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:00,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:00,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:00,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:00,484 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:00,486 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:00,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:00,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:44:00,491 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 11:44:00,497 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:00,497 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 11:44:00,553 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:44:00,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 151 transitions, 320 flow [2022-11-16 11:44:00,659 INFO L130 PetriNetUnfolder]: 31/252 cut-off events. [2022-11-16 11:44:00,660 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 11:44:00,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 252 events. 31/252 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 752 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2022-11-16 11:44:00,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 151 transitions, 320 flow [2022-11-16 11:44:00,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 151 transitions, 320 flow [2022-11-16 11:44:00,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:00,673 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:00,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:00,684 INFO L130 PetriNetUnfolder]: 5/86 cut-off events. [2022-11-16 11:44:00,685 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:00,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:00,685 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] [2022-11-16 11:44:00,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1194658159, now seen corresponding path program 1 times [2022-11-16 11:44:00,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:00,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51218629] [2022-11-16 11:44:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:00,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:00,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:00,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51218629] [2022-11-16 11:44:00,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51218629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:00,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:00,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:00,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456158364] [2022-11-16 11:44:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:00,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:44:00,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:44:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:44:00,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 151 [2022-11-16 11:44:00,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 151 transitions, 320 flow. Second operand has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:00,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 151 [2022-11-16 11:44:00,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:00,824 INFO L130 PetriNetUnfolder]: 3/221 cut-off events. [2022-11-16 11:44:00,824 INFO L131 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-11-16 11:44:00,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 221 events. 3/221 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 566 event pairs, 0 based on Foata normal form. 42/253 useless extension candidates. Maximal degree in co-relation 141. Up to 7 conditions per place. [2022-11-16 11:44:00,826 INFO L137 encePairwiseOnDemand]: 134/151 looper letters, 2 selfloop transitions, 0 changer transitions 22/133 dead transitions. [2022-11-16 11:44:00,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 133 transitions, 292 flow [2022-11-16 11:44:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:44:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:44:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 279 transitions. [2022-11-16 11:44:00,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9238410596026491 [2022-11-16 11:44:00,830 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 279 transitions. [2022-11-16 11:44:00,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 279 transitions. [2022-11-16 11:44:00,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:00,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 279 transitions. [2022-11-16 11:44:00,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,836 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,836 INFO L175 Difference]: Start difference. First operand has 137 places, 151 transitions, 320 flow. Second operand 2 states and 279 transitions. [2022-11-16 11:44:00,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 133 transitions, 292 flow [2022-11-16 11:44:00,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 133 transitions, 292 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:00,843 INFO L231 Difference]: Finished difference. Result has 137 places, 111 transitions, 234 flow [2022-11-16 11:44:00,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=137, PETRI_TRANSITIONS=111} [2022-11-16 11:44:00,846 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, 0 predicate places. [2022-11-16 11:44:00,846 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 111 transitions, 234 flow [2022-11-16 11:44:00,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:00,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:00,847 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] [2022-11-16 11:44:00,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:44:00,848 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1323740878, now seen corresponding path program 1 times [2022-11-16 11:44:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:00,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699165665] [2022-11-16 11:44:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:00,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:00,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699165665] [2022-11-16 11:44:00,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699165665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:00,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:00,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:00,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048455624] [2022-11-16 11:44:00,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:00,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:00,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:00,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:00,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:00,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 151 [2022-11-16 11:44:00,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 111 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 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) [2022-11-16 11:44:00,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:00,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 151 [2022-11-16 11:44:00,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:01,018 INFO L130 PetriNetUnfolder]: 0/136 cut-off events. [2022-11-16 11:44:01,018 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:44:01,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 136 events. 0/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 211 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-16 11:44:01,019 INFO L137 encePairwiseOnDemand]: 148/151 looper letters, 11 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2022-11-16 11:44:01,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 268 flow [2022-11-16 11:44:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2022-11-16 11:44:01,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8388520971302428 [2022-11-16 11:44:01,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2022-11-16 11:44:01,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2022-11-16 11:44:01,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:01,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2022-11-16 11:44:01,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:01,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:01,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:01,026 INFO L175 Difference]: Start difference. First operand has 137 places, 111 transitions, 234 flow. Second operand 3 states and 380 transitions. [2022-11-16 11:44:01,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 268 flow [2022-11-16 11:44:01,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 115 transitions, 266 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:01,032 INFO L231 Difference]: Finished difference. Result has 120 places, 112 transitions, 244 flow [2022-11-16 11:44:01,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=120, PETRI_TRANSITIONS=112} [2022-11-16 11:44:01,033 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -17 predicate places. [2022-11-16 11:44:01,034 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 112 transitions, 244 flow [2022-11-16 11:44:01,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 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) [2022-11-16 11:44:01,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:01,035 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] [2022-11-16 11:44:01,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:44:01,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash -526544363, now seen corresponding path program 1 times [2022-11-16 11:44:01,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:01,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740796395] [2022-11-16 11:44:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740796395] [2022-11-16 11:44:01,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740796395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917935378] [2022-11-16 11:44:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:01,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:01,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:01,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:01,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:44:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:01,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:01,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:01,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:01,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917935378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:01,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:01,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:44:01,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119647092] [2022-11-16 11:44:01,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:01,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:01,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:01,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:01,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 151 [2022-11-16 11:44:01,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 112 transitions, 244 flow. Second operand has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:01,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:01,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 151 [2022-11-16 11:44:01,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:01,680 INFO L130 PetriNetUnfolder]: 0/112 cut-off events. [2022-11-16 11:44:01,680 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:44:01,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 112 events. 0/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/114 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-16 11:44:01,681 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 9 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2022-11-16 11:44:01,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 262 flow [2022-11-16 11:44:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:44:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1107 transitions. [2022-11-16 11:44:01,687 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8145695364238411 [2022-11-16 11:44:01,687 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1107 transitions. [2022-11-16 11:44:01,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1107 transitions. [2022-11-16 11:44:01,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:01,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1107 transitions. [2022-11-16 11:44:01,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.0) internal successors, (1107), 9 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:01,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:01,697 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:01,698 INFO L175 Difference]: Start difference. First operand has 120 places, 112 transitions, 244 flow. Second operand 9 states and 1107 transitions. [2022-11-16 11:44:01,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 262 flow [2022-11-16 11:44:01,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 106 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:01,702 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 234 flow [2022-11-16 11:44:01,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2022-11-16 11:44:01,706 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -22 predicate places. [2022-11-16 11:44:01,706 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 234 flow [2022-11-16 11:44:01,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:01,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:01,708 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 11:44:01,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:01,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:01,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1036140112, now seen corresponding path program 1 times [2022-11-16 11:44:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:01,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472469784] [2022-11-16 11:44:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:01,954 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:01,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:01,985 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:01,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:01,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:01,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:44:01,986 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 11:44:01,987 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:01,987 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 11:44:02,030 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:44:02,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2022-11-16 11:44:02,129 INFO L130 PetriNetUnfolder]: 50/382 cut-off events. [2022-11-16 11:44:02,130 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-16 11:44:02,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 382 events. 50/382 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1295 event pairs, 1 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 260. Up to 16 conditions per place. [2022-11-16 11:44:02,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2022-11-16 11:44:02,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2022-11-16 11:44:02,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:02,143 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:02,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:02,151 INFO L130 PetriNetUnfolder]: 5/86 cut-off events. [2022-11-16 11:44:02,152 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:02,152 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:02,152 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] [2022-11-16 11:44:02,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:02,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:02,153 INFO L85 PathProgramCache]: Analyzing trace with hash 731290184, now seen corresponding path program 1 times [2022-11-16 11:44:02,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:02,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788059936] [2022-11-16 11:44:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:02,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:02,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:02,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788059936] [2022-11-16 11:44:02,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788059936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:02,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:02,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:02,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251775992] [2022-11-16 11:44:02,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:02,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:44:02,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:02,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:44:02,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:44:02,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 185 [2022-11-16 11:44:02,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 185 transitions, 400 flow. Second operand has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:02,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 185 [2022-11-16 11:44:02,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:02,319 INFO L130 PetriNetUnfolder]: 8/336 cut-off events. [2022-11-16 11:44:02,319 INFO L131 PetriNetUnfolder]: For 55/69 co-relation queries the response was YES. [2022-11-16 11:44:02,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 336 events. 8/336 cut-off events. For 55/69 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1075 event pairs, 1 based on Foata normal form. 104/424 useless extension candidates. Maximal degree in co-relation 235. Up to 16 conditions per place. [2022-11-16 11:44:02,322 INFO L137 encePairwiseOnDemand]: 162/185 looper letters, 3 selfloop transitions, 0 changer transitions 23/161 dead transitions. [2022-11-16 11:44:02,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 161 transitions, 364 flow [2022-11-16 11:44:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:44:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:44:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 339 transitions. [2022-11-16 11:44:02,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9162162162162162 [2022-11-16 11:44:02,324 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 339 transitions. [2022-11-16 11:44:02,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 339 transitions. [2022-11-16 11:44:02,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:02,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 339 transitions. [2022-11-16 11:44:02,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,328 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,328 INFO L175 Difference]: Start difference. First operand has 166 places, 185 transitions, 400 flow. Second operand 2 states and 339 transitions. [2022-11-16 11:44:02,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 161 transitions, 364 flow [2022-11-16 11:44:02,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 161 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:02,334 INFO L231 Difference]: Finished difference. Result has 166 places, 138 transitions, 297 flow [2022-11-16 11:44:02,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=297, PETRI_PLACES=166, PETRI_TRANSITIONS=138} [2022-11-16 11:44:02,336 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 0 predicate places. [2022-11-16 11:44:02,337 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 138 transitions, 297 flow [2022-11-16 11:44:02,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:02,337 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] [2022-11-16 11:44:02,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:44:02,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash 860372903, now seen corresponding path program 1 times [2022-11-16 11:44:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:02,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140896404] [2022-11-16 11:44:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:02,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:02,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:02,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140896404] [2022-11-16 11:44:02,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140896404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:02,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:02,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:02,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456483485] [2022-11-16 11:44:02,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:02,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:02,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:02,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 185 [2022-11-16 11:44:02,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 138 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:02,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 185 [2022-11-16 11:44:02,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:02,485 INFO L130 PetriNetUnfolder]: 0/184 cut-off events. [2022-11-16 11:44:02,485 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 11:44:02,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 184 events. 0/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 387 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-16 11:44:02,487 INFO L137 encePairwiseOnDemand]: 182/185 looper letters, 12 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2022-11-16 11:44:02,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 142 transitions, 333 flow [2022-11-16 11:44:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2022-11-16 11:44:02,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.827027027027027 [2022-11-16 11:44:02,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2022-11-16 11:44:02,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2022-11-16 11:44:02,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:02,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2022-11-16 11:44:02,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,494 INFO L175 Difference]: Start difference. First operand has 166 places, 138 transitions, 297 flow. Second operand 3 states and 459 transitions. [2022-11-16 11:44:02,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 142 transitions, 333 flow [2022-11-16 11:44:02,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 142 transitions, 327 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:02,498 INFO L231 Difference]: Finished difference. Result has 149 places, 139 transitions, 303 flow [2022-11-16 11:44:02,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=303, PETRI_PLACES=149, PETRI_TRANSITIONS=139} [2022-11-16 11:44:02,500 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, -17 predicate places. [2022-11-16 11:44:02,500 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 139 transitions, 303 flow [2022-11-16 11:44:02,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:02,501 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] [2022-11-16 11:44:02,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:44:02,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash 758812462, now seen corresponding path program 1 times [2022-11-16 11:44:02,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:02,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828659490] [2022-11-16 11:44:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:02,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:02,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:02,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828659490] [2022-11-16 11:44:02,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828659490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303710204] [2022-11-16 11:44:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:02,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:02,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:02,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:02,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:44:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:02,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:02,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:02,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:02,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303710204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:02,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:02,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:44:02,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555264679] [2022-11-16 11:44:02,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:02,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:02,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:02,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:02,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 185 [2022-11-16 11:44:02,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 139 transitions, 303 flow. Second operand has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:02,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:02,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 185 [2022-11-16 11:44:02,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:02,988 INFO L130 PetriNetUnfolder]: 0/160 cut-off events. [2022-11-16 11:44:02,989 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-16 11:44:02,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 160 events. 0/160 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 245 event pairs, 0 based on Foata normal form. 2/162 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-16 11:44:02,990 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 13 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2022-11-16 11:44:02,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 369 flow [2022-11-16 11:44:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:44:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1347 transitions. [2022-11-16 11:44:03,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.809009009009009 [2022-11-16 11:44:03,015 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1347 transitions. [2022-11-16 11:44:03,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1347 transitions. [2022-11-16 11:44:03,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:03,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1347 transitions. [2022-11-16 11:44:03,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.66666666666666) internal successors, (1347), 9 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,025 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,025 INFO L175 Difference]: Start difference. First operand has 149 places, 139 transitions, 303 flow. Second operand 9 states and 1347 transitions. [2022-11-16 11:44:03,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 149 transitions, 369 flow [2022-11-16 11:44:03,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 149 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:03,029 INFO L231 Difference]: Finished difference. Result has 159 places, 145 transitions, 351 flow [2022-11-16 11:44:03,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=159, PETRI_TRANSITIONS=145} [2022-11-16 11:44:03,030 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, -7 predicate places. [2022-11-16 11:44:03,031 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 145 transitions, 351 flow [2022-11-16 11:44:03,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:03,032 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:03,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:03,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:03,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:03,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:03,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1572942827, now seen corresponding path program 1 times [2022-11-16 11:44:03,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:03,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061541969] [2022-11-16 11:44:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:03,265 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:03,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:03,288 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:03,288 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:03,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:03,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:44:03,289 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 11:44:03,290 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:03,290 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 11:44:03,324 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 11:44:03,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 219 transitions, 482 flow [2022-11-16 11:44:03,455 INFO L130 PetriNetUnfolder]: 81/580 cut-off events. [2022-11-16 11:44:03,455 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 11:44:03,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 580 events. 81/580 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2243 event pairs, 6 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 402. Up to 32 conditions per place. [2022-11-16 11:44:03,463 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 219 transitions, 482 flow [2022-11-16 11:44:03,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 219 transitions, 482 flow [2022-11-16 11:44:03,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:03,476 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:03,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:03,488 INFO L130 PetriNetUnfolder]: 5/86 cut-off events. [2022-11-16 11:44:03,488 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:03,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:03,489 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] [2022-11-16 11:44:03,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1210199677, now seen corresponding path program 1 times [2022-11-16 11:44:03,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:03,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309446151] [2022-11-16 11:44:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:03,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:03,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:03,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309446151] [2022-11-16 11:44:03,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309446151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:03,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:03,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:03,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006043315] [2022-11-16 11:44:03,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:03,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:44:03,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:03,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:44:03,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:44:03,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 219 [2022-11-16 11:44:03,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 219 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:03,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 219 [2022-11-16 11:44:03,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:03,739 INFO L130 PetriNetUnfolder]: 21/515 cut-off events. [2022-11-16 11:44:03,739 INFO L131 PetriNetUnfolder]: For 130/152 co-relation queries the response was YES. [2022-11-16 11:44:03,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 515 events. 21/515 cut-off events. For 130/152 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2061 event pairs, 6 based on Foata normal form. 248/737 useless extension candidates. Maximal degree in co-relation 371. Up to 37 conditions per place. [2022-11-16 11:44:03,743 INFO L137 encePairwiseOnDemand]: 190/219 looper letters, 4 selfloop transitions, 0 changer transitions 24/189 dead transitions. [2022-11-16 11:44:03,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 189 transitions, 438 flow [2022-11-16 11:44:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:44:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:44:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 399 transitions. [2022-11-16 11:44:03,746 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.910958904109589 [2022-11-16 11:44:03,746 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 399 transitions. [2022-11-16 11:44:03,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 399 transitions. [2022-11-16 11:44:03,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:03,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 399 transitions. [2022-11-16 11:44:03,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 199.5) internal successors, (399), 2 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,749 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,750 INFO L175 Difference]: Start difference. First operand has 195 places, 219 transitions, 482 flow. Second operand 2 states and 399 transitions. [2022-11-16 11:44:03,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 189 transitions, 438 flow [2022-11-16 11:44:03,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 189 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:03,755 INFO L231 Difference]: Finished difference. Result has 195 places, 165 transitions, 362 flow [2022-11-16 11:44:03,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=195, PETRI_TRANSITIONS=165} [2022-11-16 11:44:03,757 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, 0 predicate places. [2022-11-16 11:44:03,757 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 165 transitions, 362 flow [2022-11-16 11:44:03,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:03,758 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] [2022-11-16 11:44:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:44:03,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1081116958, now seen corresponding path program 1 times [2022-11-16 11:44:03,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:03,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182280922] [2022-11-16 11:44:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:03,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:03,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:03,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182280922] [2022-11-16 11:44:03,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182280922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:03,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:03,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821208402] [2022-11-16 11:44:03,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:03,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:03,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:03,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:03,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 219 [2022-11-16 11:44:03,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 165 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:03,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 219 [2022-11-16 11:44:03,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:03,912 INFO L130 PetriNetUnfolder]: 0/232 cut-off events. [2022-11-16 11:44:03,912 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 11:44:03,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 232 events. 0/232 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 565 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-16 11:44:03,914 INFO L137 encePairwiseOnDemand]: 216/219 looper letters, 13 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-11-16 11:44:03,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 169 transitions, 400 flow [2022-11-16 11:44:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2022-11-16 11:44:03,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8188736681887366 [2022-11-16 11:44:03,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2022-11-16 11:44:03,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2022-11-16 11:44:03,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:03,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2022-11-16 11:44:03,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,922 INFO L175 Difference]: Start difference. First operand has 195 places, 165 transitions, 362 flow. Second operand 3 states and 538 transitions. [2022-11-16 11:44:03,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 169 transitions, 400 flow [2022-11-16 11:44:03,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 169 transitions, 388 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:03,927 INFO L231 Difference]: Finished difference. Result has 178 places, 166 transitions, 362 flow [2022-11-16 11:44:03,928 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=178, PETRI_TRANSITIONS=166} [2022-11-16 11:44:03,929 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, -17 predicate places. [2022-11-16 11:44:03,929 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 166 transitions, 362 flow [2022-11-16 11:44:03,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:03,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:03,930 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] [2022-11-16 11:44:03,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:44:03,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1002859159, now seen corresponding path program 1 times [2022-11-16 11:44:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588701539] [2022-11-16 11:44:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:04,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:04,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588701539] [2022-11-16 11:44:04,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588701539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:04,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281106875] [2022-11-16 11:44:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:04,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:04,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:04,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:04,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:44:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:04,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:04,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281106875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:04,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:04,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:44:04,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308502151] [2022-11-16 11:44:04,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:04,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:04,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:04,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 219 [2022-11-16 11:44:04,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 166 transitions, 362 flow. Second operand has 10 states, 10 states have (on average 175.3) internal successors, (1753), 10 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:04,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:04,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 219 [2022-11-16 11:44:04,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:04,499 INFO L130 PetriNetUnfolder]: 0/208 cut-off events. [2022-11-16 11:44:04,500 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 11:44:04,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 208 events. 0/208 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 422 event pairs, 0 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-16 11:44:04,501 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 14 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-11-16 11:44:04,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 430 flow [2022-11-16 11:44:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:44:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1582 transitions. [2022-11-16 11:44:04,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8026382546930492 [2022-11-16 11:44:04,507 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1582 transitions. [2022-11-16 11:44:04,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1582 transitions. [2022-11-16 11:44:04,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:04,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1582 transitions. [2022-11-16 11:44:04,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.77777777777777) internal successors, (1582), 9 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:04,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:04,522 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:04,522 INFO L175 Difference]: Start difference. First operand has 178 places, 166 transitions, 362 flow. Second operand 9 states and 1582 transitions. [2022-11-16 11:44:04,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 430 flow [2022-11-16 11:44:04,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 176 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:04,528 INFO L231 Difference]: Finished difference. Result has 188 places, 172 transitions, 410 flow [2022-11-16 11:44:04,528 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=188, PETRI_TRANSITIONS=172} [2022-11-16 11:44:04,529 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, -7 predicate places. [2022-11-16 11:44:04,530 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 172 transitions, 410 flow [2022-11-16 11:44:04,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.3) internal successors, (1753), 10 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:04,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:04,532 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:04,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:04,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:44:04,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash -453126188, now seen corresponding path program 1 times [2022-11-16 11:44:04,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:04,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413013446] [2022-11-16 11:44:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:04,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:04,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:04,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413013446] [2022-11-16 11:44:04,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413013446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:04,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574234162] [2022-11-16 11:44:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:04,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:04,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:04,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:04,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:44:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:44:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:05,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:05,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574234162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:05,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:05,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:44:05,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932384114] [2022-11-16 11:44:05,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:05,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:44:05,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:44:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:44:05,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 219 [2022-11-16 11:44:05,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 172 transitions, 410 flow. Second operand has 18 states, 18 states have (on average 175.61111111111111) internal successors, (3161), 18 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:05,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:05,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 219 [2022-11-16 11:44:05,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:05,606 INFO L130 PetriNetUnfolder]: 0/184 cut-off events. [2022-11-16 11:44:05,606 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-16 11:44:05,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 184 events. 0/184 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-16 11:44:05,607 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 15 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2022-11-16 11:44:05,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 170 transitions, 474 flow [2022-11-16 11:44:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:44:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-16 11:44:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2625 transitions. [2022-11-16 11:44:05,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7990867579908676 [2022-11-16 11:44:05,614 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2625 transitions. [2022-11-16 11:44:05,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2625 transitions. [2022-11-16 11:44:05,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:05,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2625 transitions. [2022-11-16 11:44:05,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.0) internal successors, (2625), 15 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:05,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:05,631 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:05,631 INFO L175 Difference]: Start difference. First operand has 188 places, 172 transitions, 410 flow. Second operand 15 states and 2625 transitions. [2022-11-16 11:44:05,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 170 transitions, 474 flow [2022-11-16 11:44:05,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 170 transitions, 457 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-16 11:44:05,636 INFO L231 Difference]: Finished difference. Result has 186 places, 163 transitions, 406 flow [2022-11-16 11:44:05,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=406, PETRI_PLACES=186, PETRI_TRANSITIONS=163} [2022-11-16 11:44:05,637 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, -9 predicate places. [2022-11-16 11:44:05,637 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 163 transitions, 406 flow [2022-11-16 11:44:05,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 175.61111111111111) internal successors, (3161), 18 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:05,639 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:05,640 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:05,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 11:44:05,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:44:05,846 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1687053479, now seen corresponding path program 1 times [2022-11-16 11:44:05,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:05,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939896232] [2022-11-16 11:44:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:05,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:05,870 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:05,893 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:05,893 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:05,893 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:05,893 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:05,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:44:05,894 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:44:05,895 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:05,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 11:44:05,960 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-16 11:44:05,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 253 transitions, 566 flow [2022-11-16 11:44:06,175 INFO L130 PetriNetUnfolder]: 140/918 cut-off events. [2022-11-16 11:44:06,175 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-16 11:44:06,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 918 events. 140/918 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4153 event pairs, 23 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 625. Up to 80 conditions per place. [2022-11-16 11:44:06,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 253 transitions, 566 flow [2022-11-16 11:44:06,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 253 transitions, 566 flow [2022-11-16 11:44:06,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:06,208 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:06,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:06,217 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2022-11-16 11:44:06,217 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:06,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:06,218 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] [2022-11-16 11:44:06,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash -334844128, now seen corresponding path program 1 times [2022-11-16 11:44:06,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:06,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813645379] [2022-11-16 11:44:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:06,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:06,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813645379] [2022-11-16 11:44:06,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813645379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:06,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:06,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830093487] [2022-11-16 11:44:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:06,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:44:06,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:44:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:44:06,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 253 [2022-11-16 11:44:06,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 253 transitions, 566 flow. Second operand has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:06,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 253 [2022-11-16 11:44:06,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:06,525 INFO L130 PetriNetUnfolder]: 54/826 cut-off events. [2022-11-16 11:44:06,526 INFO L131 PetriNetUnfolder]: For 292/318 co-relation queries the response was YES. [2022-11-16 11:44:06,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 826 events. 54/826 cut-off events. For 292/318 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3929 event pairs, 23 based on Foata normal form. 574/1356 useless extension candidates. Maximal degree in co-relation 596. Up to 86 conditions per place. [2022-11-16 11:44:06,534 INFO L137 encePairwiseOnDemand]: 218/253 looper letters, 5 selfloop transitions, 0 changer transitions 25/217 dead transitions. [2022-11-16 11:44:06,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 217 transitions, 514 flow [2022-11-16 11:44:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:44:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:44:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 459 transitions. [2022-11-16 11:44:06,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9071146245059288 [2022-11-16 11:44:06,537 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 459 transitions. [2022-11-16 11:44:06,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 459 transitions. [2022-11-16 11:44:06,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:06,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 459 transitions. [2022-11-16 11:44:06,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,541 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,542 INFO L175 Difference]: Start difference. First operand has 224 places, 253 transitions, 566 flow. Second operand 2 states and 459 transitions. [2022-11-16 11:44:06,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 217 transitions, 514 flow [2022-11-16 11:44:06,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 217 transitions, 514 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:06,547 INFO L231 Difference]: Finished difference. Result has 224 places, 192 transitions, 429 flow [2022-11-16 11:44:06,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=429, PETRI_PLACES=224, PETRI_TRANSITIONS=192} [2022-11-16 11:44:06,549 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, 0 predicate places. [2022-11-16 11:44:06,549 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 192 transitions, 429 flow [2022-11-16 11:44:06,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:06,550 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] [2022-11-16 11:44:06,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:44:06,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:06,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:06,551 INFO L85 PathProgramCache]: Analyzing trace with hash -205761409, now seen corresponding path program 1 times [2022-11-16 11:44:06,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:06,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210789197] [2022-11-16 11:44:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:06,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:06,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:06,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210789197] [2022-11-16 11:44:06,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210789197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:06,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:06,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:06,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227319172] [2022-11-16 11:44:06,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:06,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:06,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:06,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:06,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:06,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 253 [2022-11-16 11:44:06,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 192 transitions, 429 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:06,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 253 [2022-11-16 11:44:06,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:06,699 INFO L130 PetriNetUnfolder]: 0/280 cut-off events. [2022-11-16 11:44:06,700 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 11:44:06,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 280 events. 0/280 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 743 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-16 11:44:06,701 INFO L137 encePairwiseOnDemand]: 250/253 looper letters, 14 selfloop transitions, 2 changer transitions 0/196 dead transitions. [2022-11-16 11:44:06,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 196 transitions, 469 flow [2022-11-16 11:44:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2022-11-16 11:44:06,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8129117259552042 [2022-11-16 11:44:06,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2022-11-16 11:44:06,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2022-11-16 11:44:06,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:06,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2022-11-16 11:44:06,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,709 INFO L175 Difference]: Start difference. First operand has 224 places, 192 transitions, 429 flow. Second operand 3 states and 617 transitions. [2022-11-16 11:44:06,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 196 transitions, 469 flow [2022-11-16 11:44:06,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 196 transitions, 449 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:06,714 INFO L231 Difference]: Finished difference. Result has 207 places, 193 transitions, 421 flow [2022-11-16 11:44:06,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=207, PETRI_TRANSITIONS=193} [2022-11-16 11:44:06,716 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, -17 predicate places. [2022-11-16 11:44:06,716 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 193 transitions, 421 flow [2022-11-16 11:44:06,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:06,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:06,717 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] [2022-11-16 11:44:06,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:44:06,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1516591930, now seen corresponding path program 1 times [2022-11-16 11:44:06,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:06,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465357829] [2022-11-16 11:44:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:06,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:06,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:06,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465357829] [2022-11-16 11:44:06,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465357829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:06,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868654149] [2022-11-16 11:44:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:06,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:06,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:06,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:44:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:06,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:06,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:07,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868654149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:07,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:07,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:44:07,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198316552] [2022-11-16 11:44:07,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:07,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:07,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:07,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:07,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 253 [2022-11-16 11:44:07,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 193 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 201.3) internal successors, (2013), 10 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:07,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:07,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 253 [2022-11-16 11:44:07,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:07,230 INFO L130 PetriNetUnfolder]: 0/256 cut-off events. [2022-11-16 11:44:07,230 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 11:44:07,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 256 events. 0/256 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 599 event pairs, 0 based on Foata normal form. 2/258 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 11:44:07,231 INFO L137 encePairwiseOnDemand]: 247/253 looper letters, 15 selfloop transitions, 9 changer transitions 0/203 dead transitions. [2022-11-16 11:44:07,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 203 transitions, 491 flow [2022-11-16 11:44:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:44:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1817 transitions. [2022-11-16 11:44:07,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2022-11-16 11:44:07,237 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1817 transitions. [2022-11-16 11:44:07,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1817 transitions. [2022-11-16 11:44:07,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:07,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1817 transitions. [2022-11-16 11:44:07,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.88888888888889) internal successors, (1817), 9 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:07,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:07,260 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:07,260 INFO L175 Difference]: Start difference. First operand has 207 places, 193 transitions, 421 flow. Second operand 9 states and 1817 transitions. [2022-11-16 11:44:07,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 203 transitions, 491 flow [2022-11-16 11:44:07,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 203 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:07,266 INFO L231 Difference]: Finished difference. Result has 217 places, 199 transitions, 469 flow [2022-11-16 11:44:07,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=469, PETRI_PLACES=217, PETRI_TRANSITIONS=199} [2022-11-16 11:44:07,267 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-11-16 11:44:07,267 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 199 transitions, 469 flow [2022-11-16 11:44:07,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 201.3) internal successors, (2013), 10 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:07,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:07,269 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:07,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:07,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:07,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1187398991, now seen corresponding path program 1 times [2022-11-16 11:44:07,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:07,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127484131] [2022-11-16 11:44:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:07,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:07,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:07,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127484131] [2022-11-16 11:44:07,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127484131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:07,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730909043] [2022-11-16 11:44:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:07,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:07,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:07,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:07,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:44:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:44:07,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:07,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:08,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730909043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:08,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:08,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:44:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26099708] [2022-11-16 11:44:08,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:08,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:44:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:44:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:44:08,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 253 [2022-11-16 11:44:08,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 199 transitions, 469 flow. Second operand has 18 states, 18 states have (on average 201.61111111111111) internal successors, (3629), 18 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:08,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:08,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 253 [2022-11-16 11:44:08,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:08,384 INFO L130 PetriNetUnfolder]: 0/220 cut-off events. [2022-11-16 11:44:08,384 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-16 11:44:08,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 220 events. 0/220 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/223 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-16 11:44:08,386 INFO L137 encePairwiseOnDemand]: 248/253 looper letters, 18 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2022-11-16 11:44:08,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 202 transitions, 569 flow [2022-11-16 11:44:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:44:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:44:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3619 transitions. [2022-11-16 11:44:08,420 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7946859903381642 [2022-11-16 11:44:08,420 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3619 transitions. [2022-11-16 11:44:08,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3619 transitions. [2022-11-16 11:44:08,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:08,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3619 transitions. [2022-11-16 11:44:08,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 201.05555555555554) internal successors, (3619), 18 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:08,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:08,448 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:08,448 INFO L175 Difference]: Start difference. First operand has 217 places, 199 transitions, 469 flow. Second operand 18 states and 3619 transitions. [2022-11-16 11:44:08,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 202 transitions, 569 flow [2022-11-16 11:44:08,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 202 transitions, 548 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-16 11:44:08,455 INFO L231 Difference]: Finished difference. Result has 218 places, 193 transitions, 484 flow [2022-11-16 11:44:08,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=484, PETRI_PLACES=218, PETRI_TRANSITIONS=193} [2022-11-16 11:44:08,456 INFO L288 CegarLoopForPetriNet]: 224 programPoint places, -6 predicate places. [2022-11-16 11:44:08,456 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 193 transitions, 484 flow [2022-11-16 11:44:08,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 201.61111111111111) internal successors, (3629), 18 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:08,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:08,458 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:08,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:08,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-16 11:44:08,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:08,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:08,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1943038364, now seen corresponding path program 1 times [2022-11-16 11:44:08,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:08,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542065319] [2022-11-16 11:44:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:08,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:08,699 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:08,729 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:08,730 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:08,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:08,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:08,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 11:44:08,731 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:44:08,732 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:08,732 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-16 11:44:08,806 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-11-16 11:44:08,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 287 transitions, 652 flow [2022-11-16 11:44:09,263 INFO L130 PetriNetUnfolder]: 263/1544 cut-off events. [2022-11-16 11:44:09,263 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-11-16 11:44:09,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 1544 events. 263/1544 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8695 event pairs, 72 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 1017. Up to 192 conditions per place. [2022-11-16 11:44:09,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 287 transitions, 652 flow [2022-11-16 11:44:09,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 253 places, 287 transitions, 652 flow [2022-11-16 11:44:09,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:09,293 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:09,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:09,302 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2022-11-16 11:44:09,302 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:09,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:09,302 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] [2022-11-16 11:44:09,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash -937610465, now seen corresponding path program 1 times [2022-11-16 11:44:09,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:09,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764669456] [2022-11-16 11:44:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:09,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764669456] [2022-11-16 11:44:09,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764669456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:09,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:09,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:09,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745965759] [2022-11-16 11:44:09,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:09,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:44:09,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:44:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:44:09,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 287 [2022-11-16 11:44:09,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 287 transitions, 652 flow. Second operand has 2 states, 2 states have (on average 233.5) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:09,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:09,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 287 [2022-11-16 11:44:09,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:09,852 INFO L130 PetriNetUnfolder]: 135/1409 cut-off events. [2022-11-16 11:44:09,852 INFO L131 PetriNetUnfolder]: For 659/697 co-relation queries the response was YES. [2022-11-16 11:44:09,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 1409 events. 135/1409 cut-off events. For 659/697 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8327 event pairs, 72 based on Foata normal form. 1306/2637 useless extension candidates. Maximal degree in co-relation 1010. Up to 199 conditions per place. [2022-11-16 11:44:09,865 INFO L137 encePairwiseOnDemand]: 246/287 looper letters, 6 selfloop transitions, 0 changer transitions 26/245 dead transitions. [2022-11-16 11:44:09,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 245 transitions, 592 flow [2022-11-16 11:44:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:44:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:44:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 519 transitions. [2022-11-16 11:44:09,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9041811846689896 [2022-11-16 11:44:09,867 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 519 transitions. [2022-11-16 11:44:09,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 519 transitions. [2022-11-16 11:44:09,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:09,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 519 transitions. [2022-11-16 11:44:09,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:09,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:09,871 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:09,872 INFO L175 Difference]: Start difference. First operand has 253 places, 287 transitions, 652 flow. Second operand 2 states and 519 transitions. [2022-11-16 11:44:09,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 245 transitions, 592 flow [2022-11-16 11:44:09,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 245 transitions, 592 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:09,877 INFO L231 Difference]: Finished difference. Result has 253 places, 219 transitions, 498 flow [2022-11-16 11:44:09,878 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=498, PETRI_PLACES=253, PETRI_TRANSITIONS=219} [2022-11-16 11:44:09,879 INFO L288 CegarLoopForPetriNet]: 253 programPoint places, 0 predicate places. [2022-11-16 11:44:09,879 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 219 transitions, 498 flow [2022-11-16 11:44:09,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 233.5) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:09,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:09,879 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] [2022-11-16 11:44:09,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 11:44:09,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:09,880 INFO L85 PathProgramCache]: Analyzing trace with hash -808527746, now seen corresponding path program 1 times [2022-11-16 11:44:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:09,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280958357] [2022-11-16 11:44:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:09,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280958357] [2022-11-16 11:44:09,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280958357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:09,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:09,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:09,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960146550] [2022-11-16 11:44:09,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:09,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:09,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:09,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:09,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:09,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 287 [2022-11-16 11:44:09,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 219 transitions, 498 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:09,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:09,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 287 [2022-11-16 11:44:09,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:10,034 INFO L130 PetriNetUnfolder]: 0/328 cut-off events. [2022-11-16 11:44:10,034 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-16 11:44:10,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 328 events. 0/328 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 919 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-16 11:44:10,035 INFO L137 encePairwiseOnDemand]: 284/287 looper letters, 15 selfloop transitions, 2 changer transitions 0/223 dead transitions. [2022-11-16 11:44:10,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 223 transitions, 540 flow [2022-11-16 11:44:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2022-11-16 11:44:10,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8083623693379791 [2022-11-16 11:44:10,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2022-11-16 11:44:10,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2022-11-16 11:44:10,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:10,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2022-11-16 11:44:10,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:10,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:10,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:10,045 INFO L175 Difference]: Start difference. First operand has 253 places, 219 transitions, 498 flow. Second operand 3 states and 696 transitions. [2022-11-16 11:44:10,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 223 transitions, 540 flow [2022-11-16 11:44:10,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 223 transitions, 510 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:10,051 INFO L231 Difference]: Finished difference. Result has 236 places, 220 transitions, 480 flow [2022-11-16 11:44:10,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=480, PETRI_PLACES=236, PETRI_TRANSITIONS=220} [2022-11-16 11:44:10,052 INFO L288 CegarLoopForPetriNet]: 253 programPoint places, -17 predicate places. [2022-11-16 11:44:10,052 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 220 transitions, 480 flow [2022-11-16 11:44:10,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:10,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:10,053 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] [2022-11-16 11:44:10,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 11:44:10,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:10,054 INFO L85 PathProgramCache]: Analyzing trace with hash -782385851, now seen corresponding path program 1 times [2022-11-16 11:44:10,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:10,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853022418] [2022-11-16 11:44:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:10,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:10,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:10,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853022418] [2022-11-16 11:44:10,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853022418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:10,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834974250] [2022-11-16 11:44:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:10,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:10,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:10,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:10,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:44:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:10,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:10,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:10,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:10,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834974250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:10,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:10,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:44:10,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721008009] [2022-11-16 11:44:10,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:10,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:10,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:10,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 287 [2022-11-16 11:44:10,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 220 transitions, 480 flow. Second operand has 10 states, 10 states have (on average 227.3) internal successors, (2273), 10 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:10,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:10,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 287 [2022-11-16 11:44:10,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:10,592 INFO L130 PetriNetUnfolder]: 0/304 cut-off events. [2022-11-16 11:44:10,593 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 11:44:10,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 304 events. 0/304 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 779 event pairs, 0 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-16 11:44:10,594 INFO L137 encePairwiseOnDemand]: 281/287 looper letters, 16 selfloop transitions, 9 changer transitions 0/230 dead transitions. [2022-11-16 11:44:10,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 230 transitions, 552 flow [2022-11-16 11:44:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:44:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2052 transitions. [2022-11-16 11:44:10,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.794425087108014 [2022-11-16 11:44:10,602 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2052 transitions. [2022-11-16 11:44:10,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2052 transitions. [2022-11-16 11:44:10,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:10,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2052 transitions. [2022-11-16 11:44:10,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:10,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 287.0) internal successors, (2870), 10 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:10,617 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 287.0) internal successors, (2870), 10 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:10,617 INFO L175 Difference]: Start difference. First operand has 236 places, 220 transitions, 480 flow. Second operand 9 states and 2052 transitions. [2022-11-16 11:44:10,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 230 transitions, 552 flow [2022-11-16 11:44:10,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 230 transitions, 550 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:10,622 INFO L231 Difference]: Finished difference. Result has 246 places, 226 transitions, 528 flow [2022-11-16 11:44:10,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=246, PETRI_TRANSITIONS=226} [2022-11-16 11:44:10,623 INFO L288 CegarLoopForPetriNet]: 253 programPoint places, -7 predicate places. [2022-11-16 11:44:10,623 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 226 transitions, 528 flow [2022-11-16 11:44:10,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 227.3) internal successors, (2273), 10 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:10,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:10,625 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:10,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:10,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:10,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1417092144, now seen corresponding path program 1 times [2022-11-16 11:44:10,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:10,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138433885] [2022-11-16 11:44:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:10,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:10,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138433885] [2022-11-16 11:44:10,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138433885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:10,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170429006] [2022-11-16 11:44:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:10,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:10,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:10,995 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:11,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:44:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:11,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:44:11,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:11,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:11,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170429006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:11,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:11,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:44:11,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107619538] [2022-11-16 11:44:11,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:11,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:44:11,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:11,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:44:11,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:44:11,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 287 [2022-11-16 11:44:11,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 226 transitions, 528 flow. Second operand has 18 states, 18 states have (on average 227.61111111111111) internal successors, (4097), 18 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:11,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:11,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 287 [2022-11-16 11:44:11,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:11,722 INFO L130 PetriNetUnfolder]: 0/256 cut-off events. [2022-11-16 11:44:11,722 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 11:44:11,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 256 events. 0/256 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/260 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-16 11:44:11,723 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 21 selfloop transitions, 19 changer transitions 0/234 dead transitions. [2022-11-16 11:44:11,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 234 transitions, 664 flow [2022-11-16 11:44:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:44:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:44:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4769 transitions. [2022-11-16 11:44:11,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912726066036171 [2022-11-16 11:44:11,733 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4769 transitions. [2022-11-16 11:44:11,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4769 transitions. [2022-11-16 11:44:11,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:11,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4769 transitions. [2022-11-16 11:44:11,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 227.0952380952381) internal successors, (4769), 21 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:11,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:11,765 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:11,765 INFO L175 Difference]: Start difference. First operand has 246 places, 226 transitions, 528 flow. Second operand 21 states and 4769 transitions. [2022-11-16 11:44:11,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 234 transitions, 664 flow [2022-11-16 11:44:11,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 234 transitions, 639 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-16 11:44:11,772 INFO L231 Difference]: Finished difference. Result has 250 places, 223 transitions, 562 flow [2022-11-16 11:44:11,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=562, PETRI_PLACES=250, PETRI_TRANSITIONS=223} [2022-11-16 11:44:11,773 INFO L288 CegarLoopForPetriNet]: 253 programPoint places, -3 predicate places. [2022-11-16 11:44:11,773 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 223 transitions, 562 flow [2022-11-16 11:44:11,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 227.61111111111111) internal successors, (4097), 18 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:11,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:11,775 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:11,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:11,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:11,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:11,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1412774818, now seen corresponding path program 1 times [2022-11-16 11:44:11,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:11,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534592752] [2022-11-16 11:44:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:11,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:12,010 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:12,037 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:12,037 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:12,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:12,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:12,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 11:44:12,038 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:44:12,039 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:12,039 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-16 11:44:12,107 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-11-16 11:44:12,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 321 transitions, 740 flow [2022-11-16 11:44:13,014 INFO L130 PetriNetUnfolder]: 530/2762 cut-off events. [2022-11-16 11:44:13,014 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-11-16 11:44:13,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 2762 events. 530/2762 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18465 event pairs, 201 based on Foata normal form. 0/2416 useless extension candidates. Maximal degree in co-relation 1762. Up to 448 conditions per place. [2022-11-16 11:44:13,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 321 transitions, 740 flow [2022-11-16 11:44:13,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 321 transitions, 740 flow [2022-11-16 11:44:13,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:13,095 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:13,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:13,102 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2022-11-16 11:44:13,102 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:13,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:13,102 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] [2022-11-16 11:44:13,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:13,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1276468608, now seen corresponding path program 1 times [2022-11-16 11:44:13,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:13,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559483828] [2022-11-16 11:44:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:13,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:13,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559483828] [2022-11-16 11:44:13,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559483828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:13,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:13,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:13,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576242200] [2022-11-16 11:44:13,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:13,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:44:13,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:44:13,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:44:13,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 321 [2022-11-16 11:44:13,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 321 transitions, 740 flow. Second operand has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:13,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:13,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 321 [2022-11-16 11:44:13,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:14,070 INFO L130 PetriNetUnfolder]: 328/2552 cut-off events. [2022-11-16 11:44:14,071 INFO L131 PetriNetUnfolder]: For 1452/1480 co-relation queries the response was YES. [2022-11-16 11:44:14,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 2552 events. 328/2552 cut-off events. For 1452/1480 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18220 event pairs, 201 based on Foata normal form. 2940/5348 useless extension candidates. Maximal degree in co-relation 1825. Up to 456 conditions per place. [2022-11-16 11:44:14,104 INFO L137 encePairwiseOnDemand]: 274/321 looper letters, 7 selfloop transitions, 0 changer transitions 27/273 dead transitions. [2022-11-16 11:44:14,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 273 transitions, 672 flow [2022-11-16 11:44:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:44:14,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:44:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 579 transitions. [2022-11-16 11:44:14,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9018691588785047 [2022-11-16 11:44:14,107 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 579 transitions. [2022-11-16 11:44:14,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 579 transitions. [2022-11-16 11:44:14,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:14,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 579 transitions. [2022-11-16 11:44:14,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 289.5) internal successors, (579), 2 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,117 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,117 INFO L175 Difference]: Start difference. First operand has 282 places, 321 transitions, 740 flow. Second operand 2 states and 579 transitions. [2022-11-16 11:44:14,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 273 transitions, 672 flow [2022-11-16 11:44:14,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 273 transitions, 672 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:14,125 INFO L231 Difference]: Finished difference. Result has 282 places, 246 transitions, 569 flow [2022-11-16 11:44:14,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=569, PETRI_PLACES=282, PETRI_TRANSITIONS=246} [2022-11-16 11:44:14,126 INFO L288 CegarLoopForPetriNet]: 282 programPoint places, 0 predicate places. [2022-11-16 11:44:14,126 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 246 transitions, 569 flow [2022-11-16 11:44:14,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,127 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:14,127 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] [2022-11-16 11:44:14,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 11:44:14,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1405551327, now seen corresponding path program 1 times [2022-11-16 11:44:14,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:14,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036006472] [2022-11-16 11:44:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:14,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:14,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:14,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036006472] [2022-11-16 11:44:14,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036006472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:14,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:14,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:14,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583308178] [2022-11-16 11:44:14,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:14,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:14,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:14,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:14,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 321 [2022-11-16 11:44:14,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 246 transitions, 569 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:14,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 321 [2022-11-16 11:44:14,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:14,320 INFO L130 PetriNetUnfolder]: 0/376 cut-off events. [2022-11-16 11:44:14,320 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-16 11:44:14,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 376 events. 0/376 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1095 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-16 11:44:14,322 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 16 selfloop transitions, 2 changer transitions 0/250 dead transitions. [2022-11-16 11:44:14,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 250 transitions, 613 flow [2022-11-16 11:44:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2022-11-16 11:44:14,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8047767393561787 [2022-11-16 11:44:14,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2022-11-16 11:44:14,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2022-11-16 11:44:14,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:14,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2022-11-16 11:44:14,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,330 INFO L175 Difference]: Start difference. First operand has 282 places, 246 transitions, 569 flow. Second operand 3 states and 775 transitions. [2022-11-16 11:44:14,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 250 transitions, 613 flow [2022-11-16 11:44:14,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 250 transitions, 571 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:14,337 INFO L231 Difference]: Finished difference. Result has 265 places, 247 transitions, 539 flow [2022-11-16 11:44:14,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=539, PETRI_PLACES=265, PETRI_TRANSITIONS=247} [2022-11-16 11:44:14,339 INFO L288 CegarLoopForPetriNet]: 282 programPoint places, -17 predicate places. [2022-11-16 11:44:14,339 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 247 transitions, 539 flow [2022-11-16 11:44:14,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:14,340 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] [2022-11-16 11:44:14,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 11:44:14,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:14,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1199759078, now seen corresponding path program 1 times [2022-11-16 11:44:14,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:14,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468293417] [2022-11-16 11:44:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:14,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:14,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468293417] [2022-11-16 11:44:14,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468293417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:14,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782046608] [2022-11-16 11:44:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:14,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:14,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:14,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:14,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:44:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:14,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:14,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:14,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:14,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782046608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:14,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:14,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:44:14,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969916095] [2022-11-16 11:44:14,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:14,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:14,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:14,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:14,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:14,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 321 [2022-11-16 11:44:14,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 247 transitions, 539 flow. Second operand has 10 states, 10 states have (on average 253.3) internal successors, (2533), 10 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:14,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 321 [2022-11-16 11:44:14,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:14,967 INFO L130 PetriNetUnfolder]: 0/352 cut-off events. [2022-11-16 11:44:14,967 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-16 11:44:14,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 352 events. 0/352 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 953 event pairs, 0 based on Foata normal form. 2/354 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-16 11:44:14,968 INFO L137 encePairwiseOnDemand]: 315/321 looper letters, 17 selfloop transitions, 9 changer transitions 0/257 dead transitions. [2022-11-16 11:44:14,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 257 transitions, 613 flow [2022-11-16 11:44:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:14,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:44:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2287 transitions. [2022-11-16 11:44:14,976 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916233991000347 [2022-11-16 11:44:14,977 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2287 transitions. [2022-11-16 11:44:14,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2287 transitions. [2022-11-16 11:44:14,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:14,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2287 transitions. [2022-11-16 11:44:14,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 254.11111111111111) internal successors, (2287), 9 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,991 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:14,992 INFO L175 Difference]: Start difference. First operand has 265 places, 247 transitions, 539 flow. Second operand 9 states and 2287 transitions. [2022-11-16 11:44:14,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 257 transitions, 613 flow [2022-11-16 11:44:14,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 257 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:14,999 INFO L231 Difference]: Finished difference. Result has 275 places, 253 transitions, 587 flow [2022-11-16 11:44:15,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=587, PETRI_PLACES=275, PETRI_TRANSITIONS=253} [2022-11-16 11:44:15,002 INFO L288 CegarLoopForPetriNet]: 282 programPoint places, -7 predicate places. [2022-11-16 11:44:15,002 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 253 transitions, 587 flow [2022-11-16 11:44:15,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 253.3) internal successors, (2533), 10 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:15,003 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:15,004 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:15,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:15,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:15,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:15,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1229587375, now seen corresponding path program 1 times [2022-11-16 11:44:15,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:15,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420863664] [2022-11-16 11:44:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:15,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:15,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:15,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420863664] [2022-11-16 11:44:15,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420863664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:15,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596196868] [2022-11-16 11:44:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:15,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:15,405 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:15,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:44:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:15,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:44:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:15,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:15,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596196868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:15,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:15,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:44:15,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207387904] [2022-11-16 11:44:15,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:15,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:44:15,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:15,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:44:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:44:15,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 321 [2022-11-16 11:44:15,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 253 transitions, 587 flow. Second operand has 18 states, 18 states have (on average 253.61111111111111) internal successors, (4565), 18 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:15,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:15,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 321 [2022-11-16 11:44:15,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:16,278 INFO L130 PetriNetUnfolder]: 0/304 cut-off events. [2022-11-16 11:44:16,278 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-16 11:44:16,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 304 events. 0/304 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 637 event pairs, 0 based on Foata normal form. 4/308 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-16 11:44:16,280 INFO L137 encePairwiseOnDemand]: 315/321 looper letters, 25 selfloop transitions, 21 changer transitions 0/277 dead transitions. [2022-11-16 11:44:16,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 277 transitions, 787 flow [2022-11-16 11:44:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:44:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:44:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5321 transitions. [2022-11-16 11:44:16,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7893487613113781 [2022-11-16 11:44:16,293 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5321 transitions. [2022-11-16 11:44:16,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5321 transitions. [2022-11-16 11:44:16,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:16,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5321 transitions. [2022-11-16 11:44:16,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 253.38095238095238) internal successors, (5321), 21 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,325 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,325 INFO L175 Difference]: Start difference. First operand has 275 places, 253 transitions, 587 flow. Second operand 21 states and 5321 transitions. [2022-11-16 11:44:16,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 277 transitions, 787 flow [2022-11-16 11:44:16,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 277 transitions, 773 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:16,334 INFO L231 Difference]: Finished difference. Result has 299 places, 266 transitions, 711 flow [2022-11-16 11:44:16,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=711, PETRI_PLACES=299, PETRI_TRANSITIONS=266} [2022-11-16 11:44:16,335 INFO L288 CegarLoopForPetriNet]: 282 programPoint places, 17 predicate places. [2022-11-16 11:44:16,336 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 266 transitions, 711 flow [2022-11-16 11:44:16,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 253.61111111111111) internal successors, (4565), 18 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:16,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:16,338 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:16,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:16,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:16,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:16,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1744177439, now seen corresponding path program 1 times [2022-11-16 11:44:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:16,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281439647] [2022-11-16 11:44:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:16,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:16,581 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:16,636 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:16,636 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:16,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:16,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:16,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 11:44:16,638 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 11:44:16,639 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:16,640 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-16 11:44:16,694 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-16 11:44:16,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 311 places, 355 transitions, 830 flow [2022-11-16 11:44:18,377 INFO L130 PetriNetUnfolder]: 1117/5196 cut-off events. [2022-11-16 11:44:18,377 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-11-16 11:44:18,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6281 conditions, 5196 events. 1117/5196 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 41426 event pairs, 522 based on Foata normal form. 0/4582 useless extension candidates. Maximal degree in co-relation 3244. Up to 1024 conditions per place. [2022-11-16 11:44:18,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 355 transitions, 830 flow [2022-11-16 11:44:18,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 311 places, 355 transitions, 830 flow [2022-11-16 11:44:18,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:18,535 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:18,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:18,542 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2022-11-16 11:44:18,543 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:18,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:18,543 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] [2022-11-16 11:44:18,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash 2012425795, now seen corresponding path program 1 times [2022-11-16 11:44:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307347519] [2022-11-16 11:44:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:18,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:18,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307347519] [2022-11-16 11:44:18,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307347519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:18,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:18,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:18,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752971222] [2022-11-16 11:44:18,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:18,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:44:18,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:18,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:44:18,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:44:18,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 355 [2022-11-16 11:44:18,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 355 transitions, 830 flow. Second operand has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:18,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:18,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 355 [2022-11-16 11:44:18,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:20,766 INFO L130 PetriNetUnfolder]: 777/4847 cut-off events. [2022-11-16 11:44:20,767 INFO L131 PetriNetUnfolder]: For 3234/3284 co-relation queries the response was YES. [2022-11-16 11:44:20,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6965 conditions, 4847 events. 777/4847 cut-off events. For 3234/3284 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40521 event pairs, 522 based on Foata normal form. 6564/11137 useless extension candidates. Maximal degree in co-relation 3489. Up to 1033 conditions per place. [2022-11-16 11:44:20,813 INFO L137 encePairwiseOnDemand]: 302/355 looper letters, 8 selfloop transitions, 0 changer transitions 28/301 dead transitions. [2022-11-16 11:44:20,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 301 transitions, 754 flow [2022-11-16 11:44:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:44:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:44:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 639 transitions. [2022-11-16 11:44:20,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-16 11:44:20,816 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 639 transitions. [2022-11-16 11:44:20,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 639 transitions. [2022-11-16 11:44:20,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:20,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 639 transitions. [2022-11-16 11:44:20,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 319.5) internal successors, (639), 2 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:20,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:20,821 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:20,821 INFO L175 Difference]: Start difference. First operand has 311 places, 355 transitions, 830 flow. Second operand 2 states and 639 transitions. [2022-11-16 11:44:20,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 301 transitions, 754 flow [2022-11-16 11:44:20,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 301 transitions, 754 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:20,830 INFO L231 Difference]: Finished difference. Result has 311 places, 273 transitions, 642 flow [2022-11-16 11:44:20,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=642, PETRI_PLACES=311, PETRI_TRANSITIONS=273} [2022-11-16 11:44:20,831 INFO L288 CegarLoopForPetriNet]: 311 programPoint places, 0 predicate places. [2022-11-16 11:44:20,832 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 273 transitions, 642 flow [2022-11-16 11:44:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:20,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:20,832 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] [2022-11-16 11:44:20,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-16 11:44:20,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:20,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2141508514, now seen corresponding path program 1 times [2022-11-16 11:44:20,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:20,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087134125] [2022-11-16 11:44:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:20,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:20,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:20,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087134125] [2022-11-16 11:44:20,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087134125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:20,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:20,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:20,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290561251] [2022-11-16 11:44:20,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:20,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:20,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:20,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 355 [2022-11-16 11:44:20,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 273 transitions, 642 flow. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:20,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:20,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 355 [2022-11-16 11:44:20,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:21,073 INFO L130 PetriNetUnfolder]: 0/424 cut-off events. [2022-11-16 11:44:21,073 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-16 11:44:21,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 424 events. 0/424 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1276 event pairs, 0 based on Foata normal form. 0/416 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-16 11:44:21,075 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 17 selfloop transitions, 2 changer transitions 0/277 dead transitions. [2022-11-16 11:44:21,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 277 transitions, 688 flow [2022-11-16 11:44:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2022-11-16 11:44:21,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8018779342723005 [2022-11-16 11:44:21,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2022-11-16 11:44:21,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2022-11-16 11:44:21,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:21,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2022-11-16 11:44:21,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:21,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:21,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:21,085 INFO L175 Difference]: Start difference. First operand has 311 places, 273 transitions, 642 flow. Second operand 3 states and 854 transitions. [2022-11-16 11:44:21,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 277 transitions, 688 flow [2022-11-16 11:44:21,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 277 transitions, 632 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:21,093 INFO L231 Difference]: Finished difference. Result has 294 places, 274 transitions, 598 flow [2022-11-16 11:44:21,094 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=598, PETRI_PLACES=294, PETRI_TRANSITIONS=274} [2022-11-16 11:44:21,094 INFO L288 CegarLoopForPetriNet]: 311 programPoint places, -17 predicate places. [2022-11-16 11:44:21,095 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 274 transitions, 598 flow [2022-11-16 11:44:21,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:21,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:21,096 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] [2022-11-16 11:44:21,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-16 11:44:21,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash 134875561, now seen corresponding path program 1 times [2022-11-16 11:44:21,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:21,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34256844] [2022-11-16 11:44:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:21,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:21,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34256844] [2022-11-16 11:44:21,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34256844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:21,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918964474] [2022-11-16 11:44:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:21,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:21,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:21,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:21,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:44:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:21,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:21,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:21,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:21,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918964474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:21,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:21,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:44:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440734523] [2022-11-16 11:44:21,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:21,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:21,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:21,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 355 [2022-11-16 11:44:21,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 274 transitions, 598 flow. Second operand has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:21,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:21,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 355 [2022-11-16 11:44:21,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:21,700 INFO L130 PetriNetUnfolder]: 0/400 cut-off events. [2022-11-16 11:44:21,701 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-16 11:44:21,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 400 events. 0/400 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1130 event pairs, 0 based on Foata normal form. 2/402 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-16 11:44:21,702 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 18 selfloop transitions, 9 changer transitions 0/284 dead transitions. [2022-11-16 11:44:21,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 284 transitions, 674 flow [2022-11-16 11:44:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:44:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2522 transitions. [2022-11-16 11:44:21,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.789358372456964 [2022-11-16 11:44:21,708 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2522 transitions. [2022-11-16 11:44:21,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2522 transitions. [2022-11-16 11:44:21,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:21,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2522 transitions. [2022-11-16 11:44:21,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.22222222222223) internal successors, (2522), 9 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:21,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:21,723 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:21,723 INFO L175 Difference]: Start difference. First operand has 294 places, 274 transitions, 598 flow. Second operand 9 states and 2522 transitions. [2022-11-16 11:44:21,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 284 transitions, 674 flow [2022-11-16 11:44:21,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 284 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:21,731 INFO L231 Difference]: Finished difference. Result has 304 places, 280 transitions, 646 flow [2022-11-16 11:44:21,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=646, PETRI_PLACES=304, PETRI_TRANSITIONS=280} [2022-11-16 11:44:21,733 INFO L288 CegarLoopForPetriNet]: 311 programPoint places, -7 predicate places. [2022-11-16 11:44:21,733 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 280 transitions, 646 flow [2022-11-16 11:44:21,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:21,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:21,735 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:21,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:21,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 11:44:21,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:21,942 INFO L85 PathProgramCache]: Analyzing trace with hash -537502956, now seen corresponding path program 1 times [2022-11-16 11:44:21,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:21,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554062051] [2022-11-16 11:44:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:21,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:22,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:22,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554062051] [2022-11-16 11:44:22,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554062051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:22,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852323136] [2022-11-16 11:44:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:22,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:22,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:22,215 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:22,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:44:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:22,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:44:22,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:22,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:22,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852323136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:22,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:22,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:44:22,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162852564] [2022-11-16 11:44:22,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:22,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:44:22,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:22,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:44:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:44:22,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 355 [2022-11-16 11:44:22,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 280 transitions, 646 flow. Second operand has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:22,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:22,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 355 [2022-11-16 11:44:22,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:23,054 INFO L130 PetriNetUnfolder]: 0/352 cut-off events. [2022-11-16 11:44:23,054 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-16 11:44:23,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 352 events. 0/352 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 814 event pairs, 0 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-16 11:44:23,056 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 26 selfloop transitions, 21 changer transitions 0/304 dead transitions. [2022-11-16 11:44:23,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 304 transitions, 848 flow [2022-11-16 11:44:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:44:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:44:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5868 transitions. [2022-11-16 11:44:23,063 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.787122736418511 [2022-11-16 11:44:23,064 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5868 transitions. [2022-11-16 11:44:23,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5868 transitions. [2022-11-16 11:44:23,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:23,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5868 transitions. [2022-11-16 11:44:23,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 279.42857142857144) internal successors, (5868), 21 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:23,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:23,088 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:23,088 INFO L175 Difference]: Start difference. First operand has 304 places, 280 transitions, 646 flow. Second operand 21 states and 5868 transitions. [2022-11-16 11:44:23,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 304 transitions, 848 flow [2022-11-16 11:44:23,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 304 transitions, 834 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:23,096 INFO L231 Difference]: Finished difference. Result has 328 places, 293 transitions, 770 flow [2022-11-16 11:44:23,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=770, PETRI_PLACES=328, PETRI_TRANSITIONS=293} [2022-11-16 11:44:23,097 INFO L288 CegarLoopForPetriNet]: 311 programPoint places, 17 predicate places. [2022-11-16 11:44:23,097 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 293 transitions, 770 flow [2022-11-16 11:44:23,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:23,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:23,100 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:23,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:23,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 11:44:23,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:23,307 INFO L85 PathProgramCache]: Analyzing trace with hash 800994910, now seen corresponding path program 1 times [2022-11-16 11:44:23,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:23,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999017064] [2022-11-16 11:44:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:23,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:23,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999017064] [2022-11-16 11:44:23,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999017064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:23,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174147637] [2022-11-16 11:44:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:23,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:23,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:23,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:44:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:24,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:44:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:24,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:24,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174147637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:24,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:24,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 11:44:24,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676757789] [2022-11-16 11:44:24,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:24,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:44:24,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:24,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:44:24,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:44:24,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 355 [2022-11-16 11:44:24,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 293 transitions, 770 flow. Second operand has 34 states, 34 states have (on average 279.79411764705884) internal successors, (9513), 34 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:24,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:24,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 355 [2022-11-16 11:44:24,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:25,121 INFO L130 PetriNetUnfolder]: 0/328 cut-off events. [2022-11-16 11:44:25,122 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-16 11:44:25,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 328 events. 0/328 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/330 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-16 11:44:25,123 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 27 selfloop transitions, 25 changer transitions 0/298 dead transitions. [2022-11-16 11:44:25,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 298 transitions, 916 flow [2022-11-16 11:44:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:44:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 11:44:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7533 transitions. [2022-11-16 11:44:25,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7859154929577464 [2022-11-16 11:44:25,210 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7533 transitions. [2022-11-16 11:44:25,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7533 transitions. [2022-11-16 11:44:25,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:25,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7533 transitions. [2022-11-16 11:44:25,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 279.0) internal successors, (7533), 27 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:25,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:25,235 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:25,235 INFO L175 Difference]: Start difference. First operand has 328 places, 293 transitions, 770 flow. Second operand 27 states and 7533 transitions. [2022-11-16 11:44:25,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 298 transitions, 916 flow [2022-11-16 11:44:25,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 298 transitions, 862 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-16 11:44:25,242 INFO L231 Difference]: Finished difference. Result has 329 places, 284 transitions, 755 flow [2022-11-16 11:44:25,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=755, PETRI_PLACES=329, PETRI_TRANSITIONS=284} [2022-11-16 11:44:25,244 INFO L288 CegarLoopForPetriNet]: 311 programPoint places, 18 predicate places. [2022-11-16 11:44:25,244 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 284 transitions, 755 flow [2022-11-16 11:44:25,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 279.79411764705884) internal successors, (9513), 34 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:25,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:25,246 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:25,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 11:44:25,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:25,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:25,452 INFO L85 PathProgramCache]: Analyzing trace with hash 315005601, now seen corresponding path program 1 times [2022-11-16 11:44:25,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643149086] [2022-11-16 11:44:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:25,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:25,488 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:25,531 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:25,531 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:25,532 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:25,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:25,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-16 11:44:25,533 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 11:44:25,534 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:25,534 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-16 11:44:25,579 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-11-16 11:44:25,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 389 transitions, 922 flow [2022-11-16 11:44:28,859 INFO L130 PetriNetUnfolder]: 2408/10126 cut-off events. [2022-11-16 11:44:28,859 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-11-16 11:44:29,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12503 conditions, 10126 events. 2408/10126 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 93628 event pairs, 1291 based on Foata normal form. 0/8988 useless extension candidates. Maximal degree in co-relation 6263. Up to 2304 conditions per place. [2022-11-16 11:44:29,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 389 transitions, 922 flow [2022-11-16 11:44:29,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 340 places, 389 transitions, 922 flow [2022-11-16 11:44:29,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:29,285 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:29,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:29,295 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2022-11-16 11:44:29,295 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:29,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:29,296 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] [2022-11-16 11:44:29,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1270261096, now seen corresponding path program 1 times [2022-11-16 11:44:29,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:29,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753432063] [2022-11-16 11:44:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:29,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:29,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753432063] [2022-11-16 11:44:29,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753432063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:29,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:29,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984605902] [2022-11-16 11:44:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:29,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:44:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:44:29,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:44:29,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 389 [2022-11-16 11:44:29,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 389 transitions, 922 flow. Second operand has 2 states, 2 states have (on average 311.5) internal successors, (623), 2 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:29,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:29,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 389 [2022-11-16 11:44:29,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:32,906 INFO L130 PetriNetUnfolder]: 1802/9510 cut-off events. [2022-11-16 11:44:32,906 INFO L131 PetriNetUnfolder]: For 7120/7164 co-relation queries the response was YES. [2022-11-16 11:44:33,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14201 conditions, 9510 events. 1802/9510 cut-off events. For 7120/7164 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91638 event pairs, 1291 based on Foata normal form. 14546/23524 useless extension candidates. Maximal degree in co-relation 6946. Up to 2314 conditions per place. [2022-11-16 11:44:33,064 INFO L137 encePairwiseOnDemand]: 330/389 looper letters, 9 selfloop transitions, 0 changer transitions 29/329 dead transitions. [2022-11-16 11:44:33,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 329 transitions, 838 flow [2022-11-16 11:44:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:44:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:44:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 699 transitions. [2022-11-16 11:44:33,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8984575835475579 [2022-11-16 11:44:33,067 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 699 transitions. [2022-11-16 11:44:33,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 699 transitions. [2022-11-16 11:44:33,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:33,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 699 transitions. [2022-11-16 11:44:33,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,071 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,071 INFO L175 Difference]: Start difference. First operand has 340 places, 389 transitions, 922 flow. Second operand 2 states and 699 transitions. [2022-11-16 11:44:33,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 329 transitions, 838 flow [2022-11-16 11:44:33,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 329 transitions, 838 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:33,079 INFO L231 Difference]: Finished difference. Result has 340 places, 300 transitions, 717 flow [2022-11-16 11:44:33,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=717, PETRI_PLACES=340, PETRI_TRANSITIONS=300} [2022-11-16 11:44:33,081 INFO L288 CegarLoopForPetriNet]: 340 programPoint places, 0 predicate places. [2022-11-16 11:44:33,081 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 300 transitions, 717 flow [2022-11-16 11:44:33,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 311.5) internal successors, (623), 2 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:33,082 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] [2022-11-16 11:44:33,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-16 11:44:33,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1399343815, now seen corresponding path program 1 times [2022-11-16 11:44:33,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:33,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570768689] [2022-11-16 11:44:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:33,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:33,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570768689] [2022-11-16 11:44:33,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570768689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:33,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:33,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:33,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049633818] [2022-11-16 11:44:33,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:33,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:33,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:33,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:33,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 389 [2022-11-16 11:44:33,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 300 transitions, 717 flow. Second operand has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:33,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 389 [2022-11-16 11:44:33,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:33,301 INFO L130 PetriNetUnfolder]: 0/472 cut-off events. [2022-11-16 11:44:33,301 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-16 11:44:33,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 472 events. 0/472 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1449 event pairs, 0 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-16 11:44:33,303 INFO L137 encePairwiseOnDemand]: 386/389 looper letters, 18 selfloop transitions, 2 changer transitions 0/304 dead transitions. [2022-11-16 11:44:33,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 304 transitions, 765 flow [2022-11-16 11:44:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 933 transitions. [2022-11-16 11:44:33,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7994858611825193 [2022-11-16 11:44:33,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 933 transitions. [2022-11-16 11:44:33,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 933 transitions. [2022-11-16 11:44:33,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:33,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 933 transitions. [2022-11-16 11:44:33,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,310 INFO L175 Difference]: Start difference. First operand has 340 places, 300 transitions, 717 flow. Second operand 3 states and 933 transitions. [2022-11-16 11:44:33,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 304 transitions, 765 flow [2022-11-16 11:44:33,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 304 transitions, 693 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:33,317 INFO L231 Difference]: Finished difference. Result has 323 places, 301 transitions, 657 flow [2022-11-16 11:44:33,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=657, PETRI_PLACES=323, PETRI_TRANSITIONS=301} [2022-11-16 11:44:33,318 INFO L288 CegarLoopForPetriNet]: 340 programPoint places, -17 predicate places. [2022-11-16 11:44:33,318 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 301 transitions, 657 flow [2022-11-16 11:44:33,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:33,319 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] [2022-11-16 11:44:33,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-16 11:44:33,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash 317930894, now seen corresponding path program 1 times [2022-11-16 11:44:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:33,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390540082] [2022-11-16 11:44:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:33,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:33,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390540082] [2022-11-16 11:44:33,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390540082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:33,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042224683] [2022-11-16 11:44:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:33,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:33,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:33,389 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:33,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:44:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:33,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:33,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:33,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042224683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:33,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:33,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:44:33,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787378077] [2022-11-16 11:44:33,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:33,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:33,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:33,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 389 [2022-11-16 11:44:33,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 301 transitions, 657 flow. Second operand has 10 states, 10 states have (on average 305.3) internal successors, (3053), 10 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:33,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:33,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 389 [2022-11-16 11:44:33,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:34,062 INFO L130 PetriNetUnfolder]: 0/448 cut-off events. [2022-11-16 11:44:34,062 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-16 11:44:34,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 448 events. 0/448 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1304 event pairs, 0 based on Foata normal form. 2/450 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-16 11:44:34,063 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 19 selfloop transitions, 9 changer transitions 0/311 dead transitions. [2022-11-16 11:44:34,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 311 transitions, 735 flow [2022-11-16 11:44:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:44:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2757 transitions. [2022-11-16 11:44:34,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7874892887746359 [2022-11-16 11:44:34,067 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2757 transitions. [2022-11-16 11:44:34,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2757 transitions. [2022-11-16 11:44:34,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:34,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2757 transitions. [2022-11-16 11:44:34,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 306.3333333333333) internal successors, (2757), 9 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:34,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 389.0) internal successors, (3890), 10 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:34,076 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 389.0) internal successors, (3890), 10 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:34,077 INFO L175 Difference]: Start difference. First operand has 323 places, 301 transitions, 657 flow. Second operand 9 states and 2757 transitions. [2022-11-16 11:44:34,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 311 transitions, 735 flow [2022-11-16 11:44:34,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 311 transitions, 733 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:34,083 INFO L231 Difference]: Finished difference. Result has 333 places, 307 transitions, 705 flow [2022-11-16 11:44:34,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=705, PETRI_PLACES=333, PETRI_TRANSITIONS=307} [2022-11-16 11:44:34,084 INFO L288 CegarLoopForPetriNet]: 340 programPoint places, -7 predicate places. [2022-11-16 11:44:34,084 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 307 transitions, 705 flow [2022-11-16 11:44:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 305.3) internal successors, (3053), 10 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:34,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:34,086 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:34,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:34,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:44:34,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash -801621895, now seen corresponding path program 1 times [2022-11-16 11:44:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:34,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335262947] [2022-11-16 11:44:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:34,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335262947] [2022-11-16 11:44:34,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335262947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119169333] [2022-11-16 11:44:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:34,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:34,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:34,449 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:34,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:44:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:34,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:44:34,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:34,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:34,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119169333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:34,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:34,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:44:34,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499702760] [2022-11-16 11:44:34,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:34,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:44:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:34,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:44:34,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:44:34,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 389 [2022-11-16 11:44:34,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 307 transitions, 705 flow. Second operand has 18 states, 18 states have (on average 305.6111111111111) internal successors, (5501), 18 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:34,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:34,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 389 [2022-11-16 11:44:34,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:35,371 INFO L130 PetriNetUnfolder]: 0/400 cut-off events. [2022-11-16 11:44:35,371 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 11:44:35,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 400 events. 0/400 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 991 event pairs, 0 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 11:44:35,373 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 27 selfloop transitions, 21 changer transitions 0/331 dead transitions. [2022-11-16 11:44:35,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 331 transitions, 909 flow [2022-11-16 11:44:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:44:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:44:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6415 transitions. [2022-11-16 11:44:35,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7852858366997184 [2022-11-16 11:44:35,392 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6415 transitions. [2022-11-16 11:44:35,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6415 transitions. [2022-11-16 11:44:35,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:35,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6415 transitions. [2022-11-16 11:44:35,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 305.4761904761905) internal successors, (6415), 21 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:35,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:35,434 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:35,434 INFO L175 Difference]: Start difference. First operand has 333 places, 307 transitions, 705 flow. Second operand 21 states and 6415 transitions. [2022-11-16 11:44:35,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 331 transitions, 909 flow [2022-11-16 11:44:35,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 331 transitions, 895 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:35,443 INFO L231 Difference]: Finished difference. Result has 357 places, 320 transitions, 829 flow [2022-11-16 11:44:35,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=829, PETRI_PLACES=357, PETRI_TRANSITIONS=320} [2022-11-16 11:44:35,444 INFO L288 CegarLoopForPetriNet]: 340 programPoint places, 17 predicate places. [2022-11-16 11:44:35,444 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 320 transitions, 829 flow [2022-11-16 11:44:35,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 305.6111111111111) internal successors, (5501), 18 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:35,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:35,446 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:35,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:35,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:35,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:35,653 INFO L85 PathProgramCache]: Analyzing trace with hash -373938493, now seen corresponding path program 1 times [2022-11-16 11:44:35,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:35,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873403895] [2022-11-16 11:44:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:35,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:36,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:36,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873403895] [2022-11-16 11:44:36,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873403895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:36,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759586764] [2022-11-16 11:44:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:36,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:36,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:36,014 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:36,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:44:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:36,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:44:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:36,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:36,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759586764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:36,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:36,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 11:44:36,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480643529] [2022-11-16 11:44:36,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:36,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:44:36,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:44:36,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:44:36,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 389 [2022-11-16 11:44:36,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 320 transitions, 829 flow. Second operand has 34 states, 34 states have (on average 305.79411764705884) internal successors, (10397), 34 states have internal predecessors, (10397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:36,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:36,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 389 [2022-11-16 11:44:36,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:37,529 INFO L130 PetriNetUnfolder]: 0/364 cut-off events. [2022-11-16 11:44:37,529 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-16 11:44:37,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 364 events. 0/364 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/367 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 11:44:37,531 INFO L137 encePairwiseOnDemand]: 384/389 looper letters, 30 selfloop transitions, 28 changer transitions 0/330 dead transitions. [2022-11-16 11:44:37,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 330 transitions, 1021 flow [2022-11-16 11:44:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:44:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-16 11:44:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9151 transitions. [2022-11-16 11:44:37,547 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7841473864610111 [2022-11-16 11:44:37,547 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9151 transitions. [2022-11-16 11:44:37,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9151 transitions. [2022-11-16 11:44:37,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:37,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9151 transitions. [2022-11-16 11:44:37,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 305.03333333333336) internal successors, (9151), 30 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:37,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 389.0) internal successors, (12059), 31 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:37,586 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 389.0) internal successors, (12059), 31 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:37,586 INFO L175 Difference]: Start difference. First operand has 357 places, 320 transitions, 829 flow. Second operand 30 states and 9151 transitions. [2022-11-16 11:44:37,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 330 transitions, 1021 flow [2022-11-16 11:44:37,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 330 transitions, 961 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-16 11:44:37,597 INFO L231 Difference]: Finished difference. Result has 361 places, 314 transitions, 838 flow [2022-11-16 11:44:37,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=838, PETRI_PLACES=361, PETRI_TRANSITIONS=314} [2022-11-16 11:44:37,598 INFO L288 CegarLoopForPetriNet]: 340 programPoint places, 21 predicate places. [2022-11-16 11:44:37,598 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 314 transitions, 838 flow [2022-11-16 11:44:37,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 305.79411764705884) internal successors, (10397), 34 states have internal predecessors, (10397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:37,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:37,601 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:37,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:37,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:37,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -721016478, now seen corresponding path program 1 times [2022-11-16 11:44:37,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:37,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616131272] [2022-11-16 11:44:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:37,856 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:37,899 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:37,899 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:37,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:37,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:37,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-16 11:44:37,901 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 11:44:37,903 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:37,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-16 11:44:37,980 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-16 11:44:37,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 423 transitions, 1016 flow [2022-11-16 11:44:44,816 INFO L130 PetriNetUnfolder]: 5235/20176 cut-off events. [2022-11-16 11:44:44,816 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-11-16 11:44:45,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25382 conditions, 20176 events. 5235/20176 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 211023 event pairs, 3084 based on Foata normal form. 0/18002 useless extension candidates. Maximal degree in co-relation 12483. Up to 5120 conditions per place. [2022-11-16 11:44:45,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 369 places, 423 transitions, 1016 flow [2022-11-16 11:44:45,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 423 transitions, 1016 flow [2022-11-16 11:44:45,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:44:45,814 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;@30f3acea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:44:45,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:44:45,818 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2022-11-16 11:44:45,818 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:44:45,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:45,819 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] [2022-11-16 11:44:45,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash -950025489, now seen corresponding path program 1 times [2022-11-16 11:44:45,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:45,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57658492] [2022-11-16 11:44:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:45,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:45,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:45,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57658492] [2022-11-16 11:44:45,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57658492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:45,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:45,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:44:45,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402068824] [2022-11-16 11:44:45,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:45,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:44:45,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:45,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:44:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:44:45,866 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 423 [2022-11-16 11:44:45,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 423 transitions, 1016 flow. Second operand has 2 states, 2 states have (on average 337.5) internal successors, (675), 2 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:45,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:45,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 423 [2022-11-16 11:44:45,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:53,489 INFO L130 PetriNetUnfolder]: 4107/19037 cut-off events. [2022-11-16 11:44:53,489 INFO L131 PetriNetUnfolder]: For 15641/15705 co-relation queries the response was YES. [2022-11-16 11:44:53,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29374 conditions, 19037 events. 4107/19037 cut-off events. For 15641/15705 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 206721 event pairs, 3084 based on Foata normal form. 32006/49997 useless extension candidates. Maximal degree in co-relation 14180. Up to 5131 conditions per place. [2022-11-16 11:44:53,992 INFO L137 encePairwiseOnDemand]: 358/423 looper letters, 10 selfloop transitions, 0 changer transitions 30/357 dead transitions. [2022-11-16 11:44:53,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 357 transitions, 924 flow [2022-11-16 11:44:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:44:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:44:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 759 transitions. [2022-11-16 11:44:53,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8971631205673759 [2022-11-16 11:44:53,994 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 759 transitions. [2022-11-16 11:44:53,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 759 transitions. [2022-11-16 11:44:53,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:53,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 759 transitions. [2022-11-16 11:44:53,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 379.5) internal successors, (759), 2 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:53,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:53,997 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:53,997 INFO L175 Difference]: Start difference. First operand has 369 places, 423 transitions, 1016 flow. Second operand 2 states and 759 transitions. [2022-11-16 11:44:53,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 357 transitions, 924 flow [2022-11-16 11:44:54,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 357 transitions, 924 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:54,014 INFO L231 Difference]: Finished difference. Result has 369 places, 327 transitions, 794 flow [2022-11-16 11:44:54,015 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=794, PETRI_PLACES=369, PETRI_TRANSITIONS=327} [2022-11-16 11:44:54,015 INFO L288 CegarLoopForPetriNet]: 369 programPoint places, 0 predicate places. [2022-11-16 11:44:54,015 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 327 transitions, 794 flow [2022-11-16 11:44:54,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 337.5) internal successors, (675), 2 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:54,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:54,016 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] [2022-11-16 11:44:54,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-16 11:44:54,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:54,017 INFO L85 PathProgramCache]: Analyzing trace with hash -820942770, now seen corresponding path program 1 times [2022-11-16 11:44:54,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:54,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310710139] [2022-11-16 11:44:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:54,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:54,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310710139] [2022-11-16 11:44:54,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310710139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:54,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:54,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:54,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447120334] [2022-11-16 11:44:54,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:54,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:44:54,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:54,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:44:54,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:44:54,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 423 [2022-11-16 11:44:54,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 327 transitions, 794 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:54,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:54,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 423 [2022-11-16 11:44:54,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:54,361 INFO L130 PetriNetUnfolder]: 0/520 cut-off events. [2022-11-16 11:44:54,361 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-16 11:44:54,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 520 events. 0/520 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1626 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-16 11:44:54,363 INFO L137 encePairwiseOnDemand]: 420/423 looper letters, 19 selfloop transitions, 2 changer transitions 0/331 dead transitions. [2022-11-16 11:44:54,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 331 transitions, 844 flow [2022-11-16 11:44:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:44:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:44:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1012 transitions. [2022-11-16 11:44:54,367 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.797478329393223 [2022-11-16 11:44:54,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1012 transitions. [2022-11-16 11:44:54,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1012 transitions. [2022-11-16 11:44:54,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:54,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1012 transitions. [2022-11-16 11:44:54,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:54,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:54,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:54,373 INFO L175 Difference]: Start difference. First operand has 369 places, 327 transitions, 794 flow. Second operand 3 states and 1012 transitions. [2022-11-16 11:44:54,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 331 transitions, 844 flow [2022-11-16 11:44:54,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 331 transitions, 754 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-16 11:44:54,383 INFO L231 Difference]: Finished difference. Result has 352 places, 328 transitions, 716 flow [2022-11-16 11:44:54,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=716, PETRI_PLACES=352, PETRI_TRANSITIONS=328} [2022-11-16 11:44:54,384 INFO L288 CegarLoopForPetriNet]: 369 programPoint places, -17 predicate places. [2022-11-16 11:44:54,384 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 328 transitions, 716 flow [2022-11-16 11:44:54,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:54,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:54,385 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] [2022-11-16 11:44:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-16 11:44:54,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1748925077, now seen corresponding path program 1 times [2022-11-16 11:44:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:54,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944941238] [2022-11-16 11:44:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:54,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:54,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944941238] [2022-11-16 11:44:54,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944941238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:54,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800118280] [2022-11-16 11:44:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:54,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:54,483 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:54,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:44:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:44:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:54,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:54,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800118280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:54,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:54,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:44:54,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881502525] [2022-11-16 11:44:54,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:54,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:54,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:54,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:54,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:54,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 423 [2022-11-16 11:44:54,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 328 transitions, 716 flow. Second operand has 10 states, 10 states have (on average 331.3) internal successors, (3313), 10 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:54,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:54,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 423 [2022-11-16 11:44:54,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:55,113 INFO L130 PetriNetUnfolder]: 0/496 cut-off events. [2022-11-16 11:44:55,114 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-16 11:44:55,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 496 events. 0/496 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1484 event pairs, 0 based on Foata normal form. 2/498 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-16 11:44:55,115 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 20 selfloop transitions, 9 changer transitions 0/338 dead transitions. [2022-11-16 11:44:55,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 338 transitions, 796 flow [2022-11-16 11:44:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:44:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:44:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2992 transitions. [2022-11-16 11:44:55,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7859206724454951 [2022-11-16 11:44:55,121 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2992 transitions. [2022-11-16 11:44:55,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2992 transitions. [2022-11-16 11:44:55,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:55,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2992 transitions. [2022-11-16 11:44:55,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 332.44444444444446) internal successors, (2992), 9 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:55,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:55,132 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:55,132 INFO L175 Difference]: Start difference. First operand has 352 places, 328 transitions, 716 flow. Second operand 9 states and 2992 transitions. [2022-11-16 11:44:55,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 338 transitions, 796 flow [2022-11-16 11:44:55,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 338 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:55,142 INFO L231 Difference]: Finished difference. Result has 362 places, 334 transitions, 764 flow [2022-11-16 11:44:55,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=764, PETRI_PLACES=362, PETRI_TRANSITIONS=334} [2022-11-16 11:44:55,143 INFO L288 CegarLoopForPetriNet]: 369 programPoint places, -7 predicate places. [2022-11-16 11:44:55,143 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 334 transitions, 764 flow [2022-11-16 11:44:55,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 331.3) internal successors, (3313), 10 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:55,144 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:55,145 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:55,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:55,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:55,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:55,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2021944192, now seen corresponding path program 1 times [2022-11-16 11:44:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:55,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754008683] [2022-11-16 11:44:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:55,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:55,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:55,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754008683] [2022-11-16 11:44:55,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754008683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:55,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832082620] [2022-11-16 11:44:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:55,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:55,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:55,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:55,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:44:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:55,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:44:55,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:55,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:55,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832082620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:55,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:55,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:44:55,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341200871] [2022-11-16 11:44:55,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:55,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:44:55,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:55,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:44:55,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:44:55,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 423 [2022-11-16 11:44:55,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 334 transitions, 764 flow. Second operand has 18 states, 18 states have (on average 331.6111111111111) internal successors, (5969), 18 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:55,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:55,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 423 [2022-11-16 11:44:55,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:56,438 INFO L130 PetriNetUnfolder]: 0/448 cut-off events. [2022-11-16 11:44:56,438 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-16 11:44:56,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 448 events. 0/448 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1169 event pairs, 0 based on Foata normal form. 4/452 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-16 11:44:56,440 INFO L137 encePairwiseOnDemand]: 417/423 looper letters, 28 selfloop transitions, 21 changer transitions 0/358 dead transitions. [2022-11-16 11:44:56,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 358 transitions, 970 flow [2022-11-16 11:44:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:44:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:44:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6962 transitions. [2022-11-16 11:44:56,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7837442305527412 [2022-11-16 11:44:56,452 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6962 transitions. [2022-11-16 11:44:56,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6962 transitions. [2022-11-16 11:44:56,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:56,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6962 transitions. [2022-11-16 11:44:56,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 331.5238095238095) internal successors, (6962), 21 states have internal predecessors, (6962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:56,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:56,481 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:56,482 INFO L175 Difference]: Start difference. First operand has 362 places, 334 transitions, 764 flow. Second operand 21 states and 6962 transitions. [2022-11-16 11:44:56,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 358 transitions, 970 flow [2022-11-16 11:44:56,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 358 transitions, 956 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:44:56,495 INFO L231 Difference]: Finished difference. Result has 386 places, 347 transitions, 888 flow [2022-11-16 11:44:56,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=888, PETRI_PLACES=386, PETRI_TRANSITIONS=347} [2022-11-16 11:44:56,496 INFO L288 CegarLoopForPetriNet]: 369 programPoint places, 17 predicate places. [2022-11-16 11:44:56,497 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 347 transitions, 888 flow [2022-11-16 11:44:56,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 331.6111111111111) internal successors, (5969), 18 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:56,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:56,499 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:56,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:56,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 11:44:56,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1272529098, now seen corresponding path program 1 times [2022-11-16 11:44:56,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:56,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856643088] [2022-11-16 11:44:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:57,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856643088] [2022-11-16 11:44:57,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856643088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183457111] [2022-11-16 11:44:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:57,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:57,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:57,263 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:57,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:44:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:44:57,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:57,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:58,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183457111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:58,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:58,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 11:44:58,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172661377] [2022-11-16 11:44:58,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:58,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:44:58,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:58,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:44:58,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:44:58,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 423 [2022-11-16 11:44:58,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 347 transitions, 888 flow. Second operand has 34 states, 34 states have (on average 331.79411764705884) internal successors, (11281), 34 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:58,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:44:58,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 423 [2022-11-16 11:44:58,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:44:58,600 INFO L130 PetriNetUnfolder]: 0/400 cut-off events. [2022-11-16 11:44:58,601 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-16 11:44:58,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 400 events. 0/400 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-16 11:44:58,602 INFO L137 encePairwiseOnDemand]: 418/423 looper letters, 33 selfloop transitions, 31 changer transitions 0/362 dead transitions. [2022-11-16 11:44:58,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 362 transitions, 1126 flow [2022-11-16 11:44:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:44:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 11:44:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10925 transitions. [2022-11-16 11:44:58,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.782649186904506 [2022-11-16 11:44:58,613 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10925 transitions. [2022-11-16 11:44:58,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10925 transitions. [2022-11-16 11:44:58,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:44:58,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10925 transitions. [2022-11-16 11:44:58,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 331.06060606060606) internal successors, (10925), 33 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:58,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 423.0) internal successors, (14382), 34 states have internal predecessors, (14382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:58,641 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 423.0) internal successors, (14382), 34 states have internal predecessors, (14382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:58,641 INFO L175 Difference]: Start difference. First operand has 386 places, 347 transitions, 888 flow. Second operand 33 states and 10925 transitions. [2022-11-16 11:44:58,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 362 transitions, 1126 flow [2022-11-16 11:44:58,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 362 transitions, 1060 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-16 11:44:58,651 INFO L231 Difference]: Finished difference. Result has 393 places, 344 transitions, 921 flow [2022-11-16 11:44:58,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=921, PETRI_PLACES=393, PETRI_TRANSITIONS=344} [2022-11-16 11:44:58,652 INFO L288 CegarLoopForPetriNet]: 369 programPoint places, 24 predicate places. [2022-11-16 11:44:58,653 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 344 transitions, 921 flow [2022-11-16 11:44:58,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 331.79411764705884) internal successors, (11281), 34 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:58,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:44:58,655 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:58,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:58,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8c41c0d-1392-4882-b6ef-bcebba4078c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 11:44:58,861 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:44:58,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1397107292, now seen corresponding path program 1 times [2022-11-16 11:44:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:58,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605371686] [2022-11-16 11:44:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:58,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:58,897 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:44:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:44:58,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:44:58,932 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:44:58,932 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 11:44:58,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 11:44:58,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-16 11:44:58,933 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 11:44:58,933 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:44:58,934 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-16 11:44:58,978 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-11-16 11:44:58,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 398 places, 457 transitions, 1112 flow