./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.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_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/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_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/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_5b26c3cb-c471-4caf-bee3-c7f228c19652/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 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --- 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 12:14:05,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:14:05,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:14:05,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:14:05,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:14:05,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:14:05,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:14:05,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:14:05,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:14:05,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:14:05,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:14:05,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:14:05,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:14:05,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:14:05,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:14:05,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:14:05,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:14:05,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:14:05,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:14:05,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:14:05,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:14:05,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:14:05,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:14:05,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:14:05,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:14:05,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:14:05,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:14:05,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:14:05,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:14:05,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:14:05,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:14:05,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:14:05,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:14:05,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:14:05,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:14:05,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:14:05,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:14:05,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:14:05,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:14:05,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:14:05,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:14:05,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:14:05,920 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:14:05,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:14:05,921 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:14:05,921 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:14:05,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:14:05,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:14:05,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:14:05,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:14:05,923 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:14:05,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:14:05,924 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:14:05,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:14:05,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:14:05,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:14:05,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:14:05,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:14:05,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:14:05,926 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:14:05,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:14:05,926 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:14:05,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:14:05,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:14:05,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:14:05,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:14:05,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:05,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:14:05,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:14:05,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:14:05,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:14:05,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:14:05,928 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:14:05,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:14:05,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:14:05,929 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_5b26c3cb-c471-4caf-bee3-c7f228c19652/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 [2022-11-16 12:14:06,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:14:06,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:14:06,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:14:06,313 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:14:06,314 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:14:06,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2022-11-16 12:14:06,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/data/79f618458/54f546624c924b8bbdf36d704e9534da/FLAG595323970 [2022-11-16 12:14:06,998 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:14:06,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2022-11-16 12:14:07,014 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/data/79f618458/54f546624c924b8bbdf36d704e9534da/FLAG595323970 [2022-11-16 12:14:07,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/data/79f618458/54f546624c924b8bbdf36d704e9534da [2022-11-16 12:14:07,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:14:07,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:14:07,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:07,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:14:07,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:14:07,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:07" (1/1) ... [2022-11-16 12:14:07,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21bc692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:07, skipping insertion in model container [2022-11-16 12:14:07,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:07" (1/1) ... [2022-11-16 12:14:07,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:14:07,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:14:07,849 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_5b26c3cb-c471-4caf-bee3-c7f228c19652/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2022-11-16 12:14:07,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:07,930 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:14:07,987 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_5b26c3cb-c471-4caf-bee3-c7f228c19652/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2022-11-16 12:14:08,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:08,071 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:14:08,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08 WrapperNode [2022-11-16 12:14:08,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:08,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:08,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:14:08,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:14:08,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,149 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2022-11-16 12:14:08,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:08,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:14:08,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:14:08,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:14:08,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,214 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:14:08,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:14:08,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:14:08,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:14:08,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (1/1) ... [2022-11-16 12:14:08,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:08,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:08,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:14:08,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:14:08,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:14:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:14:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:14:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:14:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 12:14:08,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:14:08,354 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 12:14:08,354 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 12:14:08,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:14:08,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:14:08,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:14:08,357 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 12:14:08,557 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:14:08,559 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:14:09,030 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:14:09,040 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:14:09,041 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-11-16 12:14:09,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:09 BoogieIcfgContainer [2022-11-16 12:14:09,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:14:09,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:14:09,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:14:09,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:14:09,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:14:07" (1/3) ... [2022-11-16 12:14:09,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407505b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:09, skipping insertion in model container [2022-11-16 12:14:09,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:08" (2/3) ... [2022-11-16 12:14:09,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407505b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:09, skipping insertion in model container [2022-11-16 12:14:09,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:09" (3/3) ... [2022-11-16 12:14:09,078 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2022-11-16 12:14:09,095 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:14:09,108 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:14:09,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-16 12:14:09,113 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:14:09,289 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 12:14:09,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 255 transitions, 518 flow [2022-11-16 12:14:09,552 INFO L130 PetriNetUnfolder]: 73/394 cut-off events. [2022-11-16 12:14:09,553 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:14:09,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 394 events. 73/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1790 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2022-11-16 12:14:09,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 255 transitions, 518 flow [2022-11-16 12:14:09,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 250 transitions, 505 flow [2022-11-16 12:14:09,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:14:09,594 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;@61abcb6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:14:09,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-16 12:14:09,648 INFO L130 PetriNetUnfolder]: 17/143 cut-off events. [2022-11-16 12:14:09,650 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:14:09,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:09,653 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] [2022-11-16 12:14:09,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:14:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash -904220283, now seen corresponding path program 1 times [2022-11-16 12:14:09,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:09,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855313416] [2022-11-16 12:14:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:09,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:09,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:09,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855313416] [2022-11-16 12:14:09,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855313416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:09,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:09,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:14:09,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069099902] [2022-11-16 12:14:09,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:09,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:14:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:10,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:14:10,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:14:10,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 255 [2022-11-16 12:14:10,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 250 transitions, 505 flow. Second operand has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 12:14:10,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:10,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 255 [2022-11-16 12:14:10,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:10,151 INFO L130 PetriNetUnfolder]: 9/321 cut-off events. [2022-11-16 12:14:10,151 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:14:10,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 321 events. 9/321 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1414 event pairs, 0 based on Foata normal form. 63/366 useless extension candidates. Maximal degree in co-relation 177. Up to 4 conditions per place. [2022-11-16 12:14:10,157 INFO L137 encePairwiseOnDemand]: 217/255 looper letters, 1 selfloop transitions, 0 changer transitions 0/209 dead transitions. [2022-11-16 12:14:10,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 209 transitions, 425 flow [2022-11-16 12:14:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:14:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:14:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-11-16 12:14:10,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.907843137254902 [2022-11-16 12:14:10,188 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-11-16 12:14:10,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-11-16 12:14:10,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:10,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-11-16 12:14:10,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 12:14:10,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 12:14:10,216 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 12:14:10,218 INFO L175 Difference]: Start difference. First operand has 209 places, 250 transitions, 505 flow. Second operand 2 states and 463 transitions. [2022-11-16 12:14:10,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 209 transitions, 425 flow [2022-11-16 12:14:10,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 209 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:14:10,235 INFO L231 Difference]: Finished difference. Result has 207 places, 209 transitions, 423 flow [2022-11-16 12:14:10,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=423, PETRI_PLACES=207, PETRI_TRANSITIONS=209} [2022-11-16 12:14:10,243 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -2 predicate places. [2022-11-16 12:14:10,244 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 209 transitions, 423 flow [2022-11-16 12:14:10,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 12:14:10,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:10,245 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] [2022-11-16 12:14:10,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:14:10,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:14:10,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:10,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1748692154, now seen corresponding path program 1 times [2022-11-16 12:14:10,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:10,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261447926] [2022-11-16 12:14:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:10,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:10,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:10,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261447926] [2022-11-16 12:14:10,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261447926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:10,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:10,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:10,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911354858] [2022-11-16 12:14:10,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:10,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:10,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:10,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 255 [2022-11-16 12:14:10,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 209 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 12:14:10,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:10,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 255 [2022-11-16 12:14:10,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:10,540 INFO L130 PetriNetUnfolder]: 9/325 cut-off events. [2022-11-16 12:14:10,541 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:14:10,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 325 events. 9/325 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1411 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 340. Up to 9 conditions per place. [2022-11-16 12:14:10,545 INFO L137 encePairwiseOnDemand]: 252/255 looper letters, 10 selfloop transitions, 2 changer transitions 0/213 dead transitions. [2022-11-16 12:14:10,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 213 transitions, 455 flow [2022-11-16 12:14:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:14:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2022-11-16 12:14:10,549 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8209150326797385 [2022-11-16 12:14:10,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2022-11-16 12:14:10,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2022-11-16 12:14:10,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:10,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2022-11-16 12:14:10,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 12:14:10,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 12:14:10,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 12:14:10,556 INFO L175 Difference]: Start difference. First operand has 207 places, 209 transitions, 423 flow. Second operand 3 states and 628 transitions. [2022-11-16 12:14:10,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 213 transitions, 455 flow [2022-11-16 12:14:10,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 213 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:14:10,562 INFO L231 Difference]: Finished difference. Result has 210 places, 210 transitions, 435 flow [2022-11-16 12:14:10,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=210, PETRI_TRANSITIONS=210} [2022-11-16 12:14:10,564 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 1 predicate places. [2022-11-16 12:14:10,564 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 210 transitions, 435 flow [2022-11-16 12:14:10,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 12:14:10,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:10,565 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] [2022-11-16 12:14:10,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:14:10,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:14:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2004101463, now seen corresponding path program 1 times [2022-11-16 12:14:10,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:10,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459313615] [2022-11-16 12:14:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:10,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:10,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459313615] [2022-11-16 12:14:10,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459313615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:10,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865511652] [2022-11-16 12:14:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:10,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:10,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:10,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:10,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:14:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:10,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:14:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:10,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:10,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865511652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:10,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:10,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:14:10,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650910725] [2022-11-16 12:14:10,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:10,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:14:10,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:14:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:14:10,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-16 12:14:10,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 210 transitions, 435 flow. Second operand has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states 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 12:14:10,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:10,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-16 12:14:10,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:11,126 INFO L130 PetriNetUnfolder]: 9/332 cut-off events. [2022-11-16 12:14:11,127 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:14:11,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 332 events. 9/332 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1405 event pairs, 0 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 361. Up to 6 conditions per place. [2022-11-16 12:14:11,131 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 11 selfloop transitions, 9 changer transitions 0/220 dead transitions. [2022-11-16 12:14:11,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 220 transitions, 497 flow [2022-11-16 12:14:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:14:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:14:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1858 transitions. [2022-11-16 12:14:11,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095860566448801 [2022-11-16 12:14:11,138 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1858 transitions. [2022-11-16 12:14:11,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1858 transitions. [2022-11-16 12:14:11,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:11,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1858 transitions. [2022-11-16 12:14:11,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 206.44444444444446) internal successors, (1858), 9 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states 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 12:14:11,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states 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 12:14:11,153 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states 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 12:14:11,153 INFO L175 Difference]: Start difference. First operand has 210 places, 210 transitions, 435 flow. Second operand 9 states and 1858 transitions. [2022-11-16 12:14:11,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 220 transitions, 497 flow [2022-11-16 12:14:11,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 220 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:14:11,159 INFO L231 Difference]: Finished difference. Result has 220 places, 216 transitions, 483 flow [2022-11-16 12:14:11,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=483, PETRI_PLACES=220, PETRI_TRANSITIONS=216} [2022-11-16 12:14:11,162 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 11 predicate places. [2022-11-16 12:14:11,163 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 216 transitions, 483 flow [2022-11-16 12:14:11,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states 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 12:14:11,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:11,165 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-16 12:14:11,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:14:11,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:11,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:14:11,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:11,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2024350519, now seen corresponding path program 2 times [2022-11-16 12:14:11,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:11,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486711758] [2022-11-16 12:14:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:11,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:11,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486711758] [2022-11-16 12:14:11,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486711758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092392997] [2022-11-16 12:14:11,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:14:11,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:11,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:11,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:11,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:14:11,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:14:11,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:11,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:14:11,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:11,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:11,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092392997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:11,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:11,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:14:11,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901092929] [2022-11-16 12:14:11,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:11,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:14:11,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:11,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:14:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:14:11,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-16 12:14:11,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 216 transitions, 483 flow. Second operand has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states 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 12:14:11,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:11,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-16 12:14:11,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:12,270 INFO L130 PetriNetUnfolder]: 9/352 cut-off events. [2022-11-16 12:14:12,270 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-16 12:14:12,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 352 events. 9/352 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1404 event pairs, 0 based on Foata normal form. 4/339 useless extension candidates. Maximal degree in co-relation 448. Up to 11 conditions per place. [2022-11-16 12:14:12,274 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 19 selfloop transitions, 21 changer transitions 0/240 dead transitions. [2022-11-16 12:14:12,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 240 transitions, 671 flow [2022-11-16 12:14:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:14:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:14:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4328 transitions. [2022-11-16 12:14:12,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8082166199813259 [2022-11-16 12:14:12,285 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4328 transitions. [2022-11-16 12:14:12,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4328 transitions. [2022-11-16 12:14:12,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:12,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4328 transitions. [2022-11-16 12:14:12,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 206.0952380952381) internal successors, (4328), 21 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states 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 12:14:12,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:14:12,312 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:14:12,313 INFO L175 Difference]: Start difference. First operand has 220 places, 216 transitions, 483 flow. Second operand 21 states and 4328 transitions. [2022-11-16 12:14:12,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 240 transitions, 671 flow [2022-11-16 12:14:12,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 240 transitions, 657 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:14:12,320 INFO L231 Difference]: Finished difference. Result has 244 places, 229 transitions, 607 flow [2022-11-16 12:14:12,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=607, PETRI_PLACES=244, PETRI_TRANSITIONS=229} [2022-11-16 12:14:12,321 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 35 predicate places. [2022-11-16 12:14:12,322 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 229 transitions, 607 flow [2022-11-16 12:14:12,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states 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 12:14:12,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:12,324 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-11-16 12:14:12,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:12,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:12,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:14:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:12,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1856802551, now seen corresponding path program 3 times [2022-11-16 12:14:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005447428] [2022-11-16 12:14:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:12,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:13,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:13,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005447428] [2022-11-16 12:14:13,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005447428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:13,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691380647] [2022-11-16 12:14:13,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:14:13,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:13,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:13,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:13,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:14:13,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 12:14:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:14:13,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:13,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:13,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691380647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:13,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:13,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-16 12:14:13,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715249249] [2022-11-16 12:14:13,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:13,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:14:13,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:14:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:14:13,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-16 12:14:13,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 229 transitions, 607 flow. Second operand has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states 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 12:14:13,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:13,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-16 12:14:13,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:14,078 INFO L130 PetriNetUnfolder]: 9/367 cut-off events. [2022-11-16 12:14:14,079 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-16 12:14:14,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 367 events. 9/367 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1402 event pairs, 0 based on Foata normal form. 3/353 useless extension candidates. Maximal degree in co-relation 544. Up to 17 conditions per place. [2022-11-16 12:14:14,082 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 25 selfloop transitions, 30 changer transitions 0/255 dead transitions. [2022-11-16 12:14:14,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 255 transitions, 863 flow [2022-11-16 12:14:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:14:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-16 12:14:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6178 transitions. [2022-11-16 12:14:14,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8075816993464052 [2022-11-16 12:14:14,097 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6178 transitions. [2022-11-16 12:14:14,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6178 transitions. [2022-11-16 12:14:14,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:14,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6178 transitions. [2022-11-16 12:14:14,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 205.93333333333334) internal successors, (6178), 30 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states 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 12:14:14,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states 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 12:14:14,132 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states 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 12:14:14,133 INFO L175 Difference]: Start difference. First operand has 244 places, 229 transitions, 607 flow. Second operand 30 states and 6178 transitions. [2022-11-16 12:14:14,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 255 transitions, 863 flow [2022-11-16 12:14:14,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 255 transitions, 833 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-16 12:14:14,141 INFO L231 Difference]: Finished difference. Result has 271 places, 239 transitions, 735 flow [2022-11-16 12:14:14,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=735, PETRI_PLACES=271, PETRI_TRANSITIONS=239} [2022-11-16 12:14:14,143 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 62 predicate places. [2022-11-16 12:14:14,143 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 239 transitions, 735 flow [2022-11-16 12:14:14,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states 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 12:14:14,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:14,146 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-11-16 12:14:14,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:14,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:14,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:14:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1337909414, now seen corresponding path program 4 times [2022-11-16 12:14:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509074220] [2022-11-16 12:14:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:14,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:14:14,403 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:14:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:14:14,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:14:14,470 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:14:14,472 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-16 12:14:14,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-16 12:14:14,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-16 12:14:14,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-16 12:14:14,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-16 12:14:14,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:14:14,475 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-11-16 12:14:14,479 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:14:14,479 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:14:14,537 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:14:14,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 674 flow [2022-11-16 12:14:14,664 INFO L130 PetriNetUnfolder]: 118/631 cut-off events. [2022-11-16 12:14:14,665 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 12:14:14,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 631 events. 118/631 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3243 event pairs, 0 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2022-11-16 12:14:14,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 328 transitions, 674 flow [2022-11-16 12:14:14,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 328 transitions, 674 flow [2022-11-16 12:14:14,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:14:14,682 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;@61abcb6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:14:14,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-16 12:14:14,702 INFO L130 PetriNetUnfolder]: 21/187 cut-off events. [2022-11-16 12:14:14,702 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:14:14,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:14,703 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] [2022-11-16 12:14:14,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-16 12:14:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1773813126, now seen corresponding path program 1 times [2022-11-16 12:14:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:14,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43816538] [2022-11-16 12:14:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:14,731 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 12:14:14,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:14,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43816538] [2022-11-16 12:14:14,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43816538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:14,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:14,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:14:14,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53562009] [2022-11-16 12:14:14,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:14,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:14:14,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:14,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:14:14,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:14:14,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 328 [2022-11-16 12:14:14,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 328 transitions, 674 flow. Second operand has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 12:14:14,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:14,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 328 [2022-11-16 12:14:14,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:14,865 INFO L130 PetriNetUnfolder]: 17/522 cut-off events. [2022-11-16 12:14:14,866 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-16 12:14:14,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 522 events. 17/522 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2735 event pairs, 0 based on Foata normal form. 126/619 useless extension candidates. Maximal degree in co-relation 330. Up to 7 conditions per place. [2022-11-16 12:14:14,874 INFO L137 encePairwiseOnDemand]: 278/328 looper letters, 4 selfloop transitions, 0 changer transitions 0/274 dead transitions. [2022-11-16 12:14:14,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 274 transitions, 574 flow [2022-11-16 12:14:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:14:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:14:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 594 transitions. [2022-11-16 12:14:14,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9054878048780488 [2022-11-16 12:14:14,878 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 594 transitions. [2022-11-16 12:14:14,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 594 transitions. [2022-11-16 12:14:14,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:14,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 594 transitions. [2022-11-16 12:14:14,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 297.0) internal successors, (594), 2 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 12:14:14,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 12:14:14,882 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 12:14:14,883 INFO L175 Difference]: Start difference. First operand has 273 places, 328 transitions, 674 flow. Second operand 2 states and 594 transitions. [2022-11-16 12:14:14,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 274 transitions, 574 flow [2022-11-16 12:14:14,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 274 transitions, 574 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:14:14,890 INFO L231 Difference]: Finished difference. Result has 270 places, 274 transitions, 566 flow [2022-11-16 12:14:14,891 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=566, PETRI_PLACES=270, PETRI_TRANSITIONS=274} [2022-11-16 12:14:14,893 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, -3 predicate places. [2022-11-16 12:14:14,893 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 274 transitions, 566 flow [2022-11-16 12:14:14,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 12:14:14,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:14,896 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] [2022-11-16 12:14:14,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:14:14,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-16 12:14:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1298399293, now seen corresponding path program 1 times [2022-11-16 12:14:14,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:14,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167176139] [2022-11-16 12:14:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:14,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:14,944 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 12:14:14,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167176139] [2022-11-16 12:14:14,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167176139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:14,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:14,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:14,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077592231] [2022-11-16 12:14:14,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:14,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:14,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-11-16 12:14:14,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 274 transitions, 566 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 12:14:14,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:14,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-11-16 12:14:14,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:15,068 INFO L130 PetriNetUnfolder]: 17/526 cut-off events. [2022-11-16 12:14:15,068 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-16 12:14:15,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 526 events. 17/526 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2745 event pairs, 0 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 554. Up to 14 conditions per place. [2022-11-16 12:14:15,076 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/278 dead transitions. [2022-11-16 12:14:15,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 278 transitions, 604 flow [2022-11-16 12:14:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:14:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-16 12:14:15,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.818089430894309 [2022-11-16 12:14:15,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-16 12:14:15,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-16 12:14:15,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:15,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-16 12:14:15,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 12:14:15,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 12:14:15,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 12:14:15,085 INFO L175 Difference]: Start difference. First operand has 270 places, 274 transitions, 566 flow. Second operand 3 states and 805 transitions. [2022-11-16 12:14:15,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 278 transitions, 604 flow [2022-11-16 12:14:15,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 278 transitions, 604 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:14:15,092 INFO L231 Difference]: Finished difference. Result has 273 places, 275 transitions, 578 flow [2022-11-16 12:14:15,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=578, PETRI_PLACES=273, PETRI_TRANSITIONS=275} [2022-11-16 12:14:15,094 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 0 predicate places. [2022-11-16 12:14:15,094 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 275 transitions, 578 flow [2022-11-16 12:14:15,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 12:14:15,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:15,095 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] [2022-11-16 12:14:15,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:14:15,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-16 12:14:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash -551822808, now seen corresponding path program 1 times [2022-11-16 12:14:15,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:15,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367545406] [2022-11-16 12:14:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:15,199 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 12:14:15,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:15,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367545406] [2022-11-16 12:14:15,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367545406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:15,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959757178] [2022-11-16 12:14:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:15,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:15,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:15,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:15,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:14:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:15,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:14:15,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:14:15,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:14:15,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959757178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:15,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:14:15,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 12:14:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973045419] [2022-11-16 12:14:15,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:15,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:14:15,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-11-16 12:14:15,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 275 transitions, 578 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 12:14:15,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:15,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-11-16 12:14:15,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:15,452 INFO L130 PetriNetUnfolder]: 13/427 cut-off events. [2022-11-16 12:14:15,452 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-16 12:14:15,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 427 events. 13/427 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1983 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 463. Up to 16 conditions per place. [2022-11-16 12:14:15,460 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/279 dead transitions. [2022-11-16 12:14:15,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 279 transitions, 616 flow [2022-11-16 12:14:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:14:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-16 12:14:15,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.818089430894309 [2022-11-16 12:14:15,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-16 12:14:15,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-16 12:14:15,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:15,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-16 12:14:15,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 12:14:15,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 12:14:15,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 12:14:15,469 INFO L175 Difference]: Start difference. First operand has 273 places, 275 transitions, 578 flow. Second operand 3 states and 805 transitions. [2022-11-16 12:14:15,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 279 transitions, 616 flow [2022-11-16 12:14:15,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 279 transitions, 614 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:14:15,475 INFO L231 Difference]: Finished difference. Result has 275 places, 276 transitions, 588 flow [2022-11-16 12:14:15,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=588, PETRI_PLACES=275, PETRI_TRANSITIONS=276} [2022-11-16 12:14:15,478 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 2 predicate places. [2022-11-16 12:14:15,478 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 276 transitions, 588 flow [2022-11-16 12:14:15,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 12:14:15,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:15,479 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] [2022-11-16 12:14:15,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:15,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:15,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-16 12:14:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:15,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1998915190, now seen corresponding path program 1 times [2022-11-16 12:14:15,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:15,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621940529] [2022-11-16 12:14:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:15,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:15,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:15,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621940529] [2022-11-16 12:14:15,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621940529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:15,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545546953] [2022-11-16 12:14:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:15,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:15,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:15,775 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:15,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:14:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:14:15,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:15,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:15,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545546953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:15,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:15,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:14:15,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987895325] [2022-11-16 12:14:15,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:15,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:14:15,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:14:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:14:15,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-16 12:14:15,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 276 transitions, 588 flow. Second operand has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states 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 12:14:15,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:15,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-16 12:14:15,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:16,132 INFO L130 PetriNetUnfolder]: 13/434 cut-off events. [2022-11-16 12:14:16,132 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-16 12:14:16,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 434 events. 13/434 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1978 event pairs, 0 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 481. Up to 11 conditions per place. [2022-11-16 12:14:16,141 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 14 selfloop transitions, 9 changer transitions 0/286 dead transitions. [2022-11-16 12:14:16,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 286 transitions, 656 flow [2022-11-16 12:14:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:14:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:14:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2383 transitions. [2022-11-16 12:14:16,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8072493224932249 [2022-11-16 12:14:16,147 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2383 transitions. [2022-11-16 12:14:16,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2383 transitions. [2022-11-16 12:14:16,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:16,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2383 transitions. [2022-11-16 12:14:16,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 264.77777777777777) internal successors, (2383), 9 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states 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 12:14:16,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states 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 12:14:16,161 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states 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 12:14:16,161 INFO L175 Difference]: Start difference. First operand has 275 places, 276 transitions, 588 flow. Second operand 9 states and 2383 transitions. [2022-11-16 12:14:16,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 286 transitions, 656 flow [2022-11-16 12:14:16,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 286 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:14:16,168 INFO L231 Difference]: Finished difference. Result has 285 places, 282 transitions, 636 flow [2022-11-16 12:14:16,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=636, PETRI_PLACES=285, PETRI_TRANSITIONS=282} [2022-11-16 12:14:16,169 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 12 predicate places. [2022-11-16 12:14:16,169 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 282 transitions, 636 flow [2022-11-16 12:14:16,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states 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 12:14:16,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:16,171 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-16 12:14:16,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:16,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:16,377 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-16 12:14:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:16,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2034182826, now seen corresponding path program 2 times [2022-11-16 12:14:16,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:16,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587902580] [2022-11-16 12:14:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:16,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:16,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587902580] [2022-11-16 12:14:16,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587902580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:16,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447523096] [2022-11-16 12:14:16,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:14:16,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:16,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:16,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:16,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:14:16,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:14:16,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:16,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:14:16,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:16,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:16,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447523096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:16,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:16,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:14:16,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495213190] [2022-11-16 12:14:16,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:16,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:14:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:14:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:14:16,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-16 12:14:16,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 282 transitions, 636 flow. Second operand has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states 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 12:14:16,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:16,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-16 12:14:16,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:17,187 INFO L130 PetriNetUnfolder]: 13/454 cut-off events. [2022-11-16 12:14:17,188 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-16 12:14:17,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 454 events. 13/454 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1980 event pairs, 0 based on Foata normal form. 4/438 useless extension candidates. Maximal degree in co-relation 568. Up to 11 conditions per place. [2022-11-16 12:14:17,197 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 22 selfloop transitions, 21 changer transitions 0/306 dead transitions. [2022-11-16 12:14:17,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 306 transitions, 830 flow [2022-11-16 12:14:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:14:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:14:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5549 transitions. [2022-11-16 12:14:17,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8056039488966318 [2022-11-16 12:14:17,210 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5549 transitions. [2022-11-16 12:14:17,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5549 transitions. [2022-11-16 12:14:17,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:17,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5549 transitions. [2022-11-16 12:14:17,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 264.23809523809524) internal successors, (5549), 21 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states 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 12:14:17,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states 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 12:14:17,239 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states 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 12:14:17,239 INFO L175 Difference]: Start difference. First operand has 285 places, 282 transitions, 636 flow. Second operand 21 states and 5549 transitions. [2022-11-16 12:14:17,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 306 transitions, 830 flow [2022-11-16 12:14:17,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 306 transitions, 816 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:14:17,246 INFO L231 Difference]: Finished difference. Result has 309 places, 295 transitions, 760 flow [2022-11-16 12:14:17,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=760, PETRI_PLACES=309, PETRI_TRANSITIONS=295} [2022-11-16 12:14:17,248 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 36 predicate places. [2022-11-16 12:14:17,248 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 295 transitions, 760 flow [2022-11-16 12:14:17,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states 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 12:14:17,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:17,250 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-11-16 12:14:17,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:17,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:14:17,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-16 12:14:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1341183210, now seen corresponding path program 3 times [2022-11-16 12:14:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:17,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692700487] [2022-11-16 12:14:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:17,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:17,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:17,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692700487] [2022-11-16 12:14:17,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692700487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:17,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785837229] [2022-11-16 12:14:17,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:14:17,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:17,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:17,859 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:17,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:14:18,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 12:14:18,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:18,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:14:18,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:18,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 12:14:18,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785837229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:18,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:18,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-16 12:14:18,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661826746] [2022-11-16 12:14:18,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:18,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:14:18,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:14:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:14:18,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-16 12:14:18,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 295 transitions, 760 flow. Second operand has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states 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 12:14:18,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:18,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-16 12:14:18,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:18,873 INFO L130 PetriNetUnfolder]: 13/469 cut-off events. [2022-11-16 12:14:18,874 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-16 12:14:18,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 469 events. 13/469 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1978 event pairs, 0 based on Foata normal form. 3/452 useless extension candidates. Maximal degree in co-relation 664. Up to 17 conditions per place. [2022-11-16 12:14:18,883 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 28 selfloop transitions, 30 changer transitions 0/321 dead transitions. [2022-11-16 12:14:18,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 321 transitions, 1022 flow [2022-11-16 12:14:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:14:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-16 12:14:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7921 transitions. [2022-11-16 12:14:18,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8049796747967479 [2022-11-16 12:14:18,897 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7921 transitions. [2022-11-16 12:14:18,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7921 transitions. [2022-11-16 12:14:18,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:18,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7921 transitions. [2022-11-16 12:14:18,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 264.03333333333336) internal successors, (7921), 30 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states 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 12:14:18,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states 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 12:14:18,940 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states 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 12:14:18,940 INFO L175 Difference]: Start difference. First operand has 309 places, 295 transitions, 760 flow. Second operand 30 states and 7921 transitions. [2022-11-16 12:14:18,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 321 transitions, 1022 flow [2022-11-16 12:14:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 321 transitions, 992 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-16 12:14:18,948 INFO L231 Difference]: Finished difference. Result has 336 places, 305 transitions, 888 flow [2022-11-16 12:14:18,949 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=888, PETRI_PLACES=336, PETRI_TRANSITIONS=305} [2022-11-16 12:14:18,950 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 63 predicate places. [2022-11-16 12:14:18,950 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 305 transitions, 888 flow [2022-11-16 12:14:18,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states 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 12:14:18,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:18,953 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-11-16 12:14:18,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 12:14:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:19,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-16 12:14:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2096976127, now seen corresponding path program 4 times [2022-11-16 12:14:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:19,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732659004] [2022-11-16 12:14:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:14:19,195 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:14:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:14:19,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:14:19,242 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:14:19,242 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-16 12:14:19,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-16 12:14:19,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-16 12:14:19,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-16 12:14:19,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-16 12:14:19,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-16 12:14:19,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:14:19,244 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-16 12:14:19,245 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:14:19,245 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:14:19,292 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:14:19,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 401 transitions, 832 flow [2022-11-16 12:14:19,511 INFO L130 PetriNetUnfolder]: 168/901 cut-off events. [2022-11-16 12:14:19,511 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-16 12:14:19,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 901 events. 168/901 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4935 event pairs, 1 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 639. Up to 16 conditions per place. [2022-11-16 12:14:19,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 401 transitions, 832 flow [2022-11-16 12:14:19,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 401 transitions, 832 flow [2022-11-16 12:14:19,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:14:19,549 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;@61abcb6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:14:19,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-16 12:14:19,563 INFO L130 PetriNetUnfolder]: 21/187 cut-off events. [2022-11-16 12:14:19,563 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:14:19,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:19,564 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] [2022-11-16 12:14:19,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:14:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:19,564 INFO L85 PathProgramCache]: Analyzing trace with hash -168896198, now seen corresponding path program 1 times [2022-11-16 12:14:19,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217829559] [2022-11-16 12:14:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:19,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:19,583 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 12:14:19,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:19,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217829559] [2022-11-16 12:14:19,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217829559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:19,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:19,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:14:19,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695012126] [2022-11-16 12:14:19,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:19,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:14:19,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:19,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:14:19,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:14:19,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 401 [2022-11-16 12:14:19,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 401 transitions, 832 flow. Second operand has 2 states, 2 states have (on average 329.5) internal successors, (659), 2 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 12:14:19,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:19,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 401 [2022-11-16 12:14:19,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:19,754 INFO L130 PetriNetUnfolder]: 27/749 cut-off events. [2022-11-16 12:14:19,754 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-16 12:14:19,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 749 events. 27/749 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4216 event pairs, 1 based on Foata normal form. 256/963 useless extension candidates. Maximal degree in co-relation 536. Up to 16 conditions per place. [2022-11-16 12:14:19,769 INFO L137 encePairwiseOnDemand]: 339/401 looper letters, 6 selfloop transitions, 0 changer transitions 0/334 dead transitions. [2022-11-16 12:14:19,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 334 transitions, 710 flow [2022-11-16 12:14:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:14:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:14:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-11-16 12:14:19,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9027431421446384 [2022-11-16 12:14:19,772 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-11-16 12:14:19,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-11-16 12:14:19,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:19,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-11-16 12:14:19,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 362.0) internal successors, (724), 2 states have internal predecessors, (724), 0 states have call successors, (0), 0 states 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 12:14:19,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states 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 12:14:19,776 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states 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 12:14:19,776 INFO L175 Difference]: Start difference. First operand has 333 places, 401 transitions, 832 flow. Second operand 2 states and 724 transitions. [2022-11-16 12:14:19,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 334 transitions, 710 flow [2022-11-16 12:14:19,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 334 transitions, 710 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:14:19,783 INFO L231 Difference]: Finished difference. Result has 329 places, 334 transitions, 698 flow [2022-11-16 12:14:19,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=698, PETRI_PLACES=329, PETRI_TRANSITIONS=334} [2022-11-16 12:14:19,785 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, -4 predicate places. [2022-11-16 12:14:19,785 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 334 transitions, 698 flow [2022-11-16 12:14:19,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 329.5) internal successors, (659), 2 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 12:14:19,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:19,786 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] [2022-11-16 12:14:19,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:14:19,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:14:19,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1391651075, now seen corresponding path program 1 times [2022-11-16 12:14:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:19,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566390981] [2022-11-16 12:14:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:19,821 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 12:14:19,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566390981] [2022-11-16 12:14:19,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566390981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:19,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:19,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592547268] [2022-11-16 12:14:19,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:19,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:19,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:19,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:19,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-11-16 12:14:19,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 334 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states 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 12:14:19,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:19,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-11-16 12:14:19,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:20,024 INFO L130 PetriNetUnfolder]: 27/753 cut-off events. [2022-11-16 12:14:20,025 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-16 12:14:20,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 753 events. 27/753 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4242 event pairs, 1 based on Foata normal form. 0/711 useless extension candidates. Maximal degree in co-relation 803. Up to 23 conditions per place. [2022-11-16 12:14:20,039 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/338 dead transitions. [2022-11-16 12:14:20,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 338 transitions, 740 flow [2022-11-16 12:14:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:14:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-11-16 12:14:20,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8154613466334164 [2022-11-16 12:14:20,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-11-16 12:14:20,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-11-16 12:14:20,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:20,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-11-16 12:14:20,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 12:14:20,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states 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 12:14:20,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states 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 12:14:20,047 INFO L175 Difference]: Start difference. First operand has 329 places, 334 transitions, 698 flow. Second operand 3 states and 981 transitions. [2022-11-16 12:14:20,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 338 transitions, 740 flow [2022-11-16 12:14:20,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 338 transitions, 740 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:14:20,054 INFO L231 Difference]: Finished difference. Result has 332 places, 335 transitions, 710 flow [2022-11-16 12:14:20,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=332, PETRI_TRANSITIONS=335} [2022-11-16 12:14:20,055 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, -1 predicate places. [2022-11-16 12:14:20,055 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 335 transitions, 710 flow [2022-11-16 12:14:20,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states 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 12:14:20,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:20,056 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] [2022-11-16 12:14:20,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:14:20,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:14:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash -903731015, now seen corresponding path program 1 times [2022-11-16 12:14:20,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:20,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199726345] [2022-11-16 12:14:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:20,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:20,115 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 12:14:20,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:20,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199726345] [2022-11-16 12:14:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199726345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656110058] [2022-11-16 12:14:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:20,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:20,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:20,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:20,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:14:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:20,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:14:20,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:14:20,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:14:20,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656110058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:20,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:14:20,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 12:14:20,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712147516] [2022-11-16 12:14:20,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:20,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:20,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:20,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:14:20,256 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-11-16 12:14:20,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 335 transitions, 710 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states 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 12:14:20,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:20,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-11-16 12:14:20,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:20,436 INFO L130 PetriNetUnfolder]: 23/654 cut-off events. [2022-11-16 12:14:20,436 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-16 12:14:20,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 654 events. 23/654 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3491 event pairs, 1 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 717. Up to 30 conditions per place. [2022-11-16 12:14:20,452 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/339 dead transitions. [2022-11-16 12:14:20,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 339 transitions, 752 flow [2022-11-16 12:14:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:14:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-11-16 12:14:20,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8154613466334164 [2022-11-16 12:14:20,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-11-16 12:14:20,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-11-16 12:14:20,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:20,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-11-16 12:14:20,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 12:14:20,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states 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 12:14:20,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states 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 12:14:20,460 INFO L175 Difference]: Start difference. First operand has 332 places, 335 transitions, 710 flow. Second operand 3 states and 981 transitions. [2022-11-16 12:14:20,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 339 transitions, 752 flow [2022-11-16 12:14:20,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 339 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:14:20,467 INFO L231 Difference]: Finished difference. Result has 334 places, 336 transitions, 720 flow [2022-11-16 12:14:20,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=720, PETRI_PLACES=334, PETRI_TRANSITIONS=336} [2022-11-16 12:14:20,469 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, 1 predicate places. [2022-11-16 12:14:20,469 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 336 transitions, 720 flow [2022-11-16 12:14:20,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states 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 12:14:20,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:20,470 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:20,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:20,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:14:20,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:14:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:20,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1806901930, now seen corresponding path program 1 times [2022-11-16 12:14:20,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:20,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279570325] [2022-11-16 12:14:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:20,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:14:20,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:20,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279570325] [2022-11-16 12:14:20,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279570325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:20,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855522566] [2022-11-16 12:14:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:20,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:20,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:14:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:14:20,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:14:20,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:14:20,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855522566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:20,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:14:20,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 12:14:20,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017166722] [2022-11-16 12:14:20,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:20,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:20,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:14:20,908 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-11-16 12:14:20,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 336 transitions, 720 flow. Second operand has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states 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 12:14:20,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:20,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-11-16 12:14:20,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:21,171 INFO L130 PetriNetUnfolder]: 26/807 cut-off events. [2022-11-16 12:14:21,171 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-16 12:14:21,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 807 events. 26/807 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4008 event pairs, 1 based on Foata normal form. 0/769 useless extension candidates. Maximal degree in co-relation 890. Up to 36 conditions per place. [2022-11-16 12:14:21,193 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 16 selfloop transitions, 2 changer transitions 0/340 dead transitions. [2022-11-16 12:14:21,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 340 transitions, 764 flow [2022-11-16 12:14:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:14:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2022-11-16 12:14:21,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8137988362427265 [2022-11-16 12:14:21,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2022-11-16 12:14:21,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2022-11-16 12:14:21,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:21,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2022-11-16 12:14:21,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 12:14:21,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states 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 12:14:21,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states 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 12:14:21,202 INFO L175 Difference]: Start difference. First operand has 334 places, 336 transitions, 720 flow. Second operand 3 states and 979 transitions. [2022-11-16 12:14:21,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 340 transitions, 764 flow [2022-11-16 12:14:21,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 340 transitions, 762 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:14:21,209 INFO L231 Difference]: Finished difference. Result has 336 places, 337 transitions, 730 flow [2022-11-16 12:14:21,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=730, PETRI_PLACES=336, PETRI_TRANSITIONS=337} [2022-11-16 12:14:21,211 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, 3 predicate places. [2022-11-16 12:14:21,211 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 337 transitions, 730 flow [2022-11-16 12:14:21,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states 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 12:14:21,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:21,212 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:21,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:21,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:14:21,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:14:21,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1390557140, now seen corresponding path program 1 times [2022-11-16 12:14:21,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:21,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071864469] [2022-11-16 12:14:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:21,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:21,493 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 12:14:21,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:21,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071864469] [2022-11-16 12:14:21,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071864469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:21,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343208600] [2022-11-16 12:14:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:21,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:21,496 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:21,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:14:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:21,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:14:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:21,666 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 12:14:21,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:21,705 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 12:14:21,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343208600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:21,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:21,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:14:21,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657224684] [2022-11-16 12:14:21,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:21,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:14:21,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:21,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:14:21,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:14:21,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-11-16 12:14:21,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 337 transitions, 730 flow. Second operand has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states 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 12:14:21,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:21,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-11-16 12:14:21,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:22,078 INFO L130 PetriNetUnfolder]: 26/814 cut-off events. [2022-11-16 12:14:22,078 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-16 12:14:22,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 814 events. 26/814 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3984 event pairs, 1 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 899. Up to 20 conditions per place. [2022-11-16 12:14:22,097 INFO L137 encePairwiseOnDemand]: 395/401 looper letters, 16 selfloop transitions, 9 changer transitions 0/347 dead transitions. [2022-11-16 12:14:22,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 347 transitions, 802 flow [2022-11-16 12:14:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:14:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:14:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2907 transitions. [2022-11-16 12:14:22,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8054862842892768 [2022-11-16 12:14:22,103 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2907 transitions. [2022-11-16 12:14:22,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2907 transitions. [2022-11-16 12:14:22,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:22,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2907 transitions. [2022-11-16 12:14:22,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.0) internal successors, (2907), 9 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states 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 12:14:22,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states 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 12:14:22,118 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states 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 12:14:22,118 INFO L175 Difference]: Start difference. First operand has 336 places, 337 transitions, 730 flow. Second operand 9 states and 2907 transitions. [2022-11-16 12:14:22,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 347 transitions, 802 flow [2022-11-16 12:14:22,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 347 transitions, 800 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:14:22,126 INFO L231 Difference]: Finished difference. Result has 346 places, 343 transitions, 778 flow [2022-11-16 12:14:22,127 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=346, PETRI_TRANSITIONS=343} [2022-11-16 12:14:22,127 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, 13 predicate places. [2022-11-16 12:14:22,128 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 343 transitions, 778 flow [2022-11-16 12:14:22,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states 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 12:14:22,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:22,130 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2022-11-16 12:14:22,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:14:22,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:14:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:22,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1552260436, now seen corresponding path program 2 times [2022-11-16 12:14:22,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:22,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664645417] [2022-11-16 12:14:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:22,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:22,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664645417] [2022-11-16 12:14:22,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664645417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:22,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95341008] [2022-11-16 12:14:22,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:14:22,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:22,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:22,499 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:22,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b26c3cb-c471-4caf-bee3-c7f228c19652/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:14:22,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:14:22,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:22,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:14:22,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:22,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:14:22,958 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:14:22,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:14:23,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:14:23,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:14:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:14:23,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:14:23,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95341008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:23,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:14:23,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2022-11-16 12:14:23,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455699519] [2022-11-16 12:14:23,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:23,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:14:23,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:23,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:14:23,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:14:23,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 401 [2022-11-16 12:14:23,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 343 transitions, 778 flow. Second operand has 12 states, 12 states have (on average 268.3333333333333) internal successors, (3220), 12 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states 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 12:14:23,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:23,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 401 [2022-11-16 12:14:23,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand