./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/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_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/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_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/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 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 --- 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 12:27:21,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:27:21,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:27:21,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:27:21,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:27:21,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:27:21,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:27:21,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:27:21,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:27:21,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:27:21,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:27:21,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:27:21,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:27:21,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:27:21,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:27:21,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:27:21,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:27:21,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:27:21,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:27:21,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:27:21,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:27:21,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:27:21,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:27:21,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:27:21,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:27:21,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:27:21,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:27:21,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:27:21,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:27:21,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:27:21,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:27:21,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:27:21,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:27:21,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:27:21,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:27:21,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:27:21,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:27:21,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:27:21,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:27:21,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:27:21,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:27:21,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:27:21,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:27:21,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:27:21,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:27:21,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:27:21,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:27:21,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:27:21,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:27:21,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:27:21,788 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:27:21,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:27:21,790 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:27:21,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:27:21,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:27:21,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:27:21,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:27:21,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:27:21,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:27:21,811 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:27:21,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:27:21,811 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:27:21,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:27:21,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:27:21,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:27:21,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:27:21,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:27:21,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:27:21,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:27:21,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:27:21,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:27:21,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:27:21,818 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:27:21,818 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:27:21,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:27:21,819 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_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 [2022-11-16 12:27:22,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:27:22,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:27:22,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:27:22,156 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:27:22,157 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:27:22,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-11-16 12:27:22,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/data/dcd959b7c/91b8271368634d1dabfeadca3152e486/FLAGe228a7820 [2022-11-16 12:27:22,789 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:27:22,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-11-16 12:27:22,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/data/dcd959b7c/91b8271368634d1dabfeadca3152e486/FLAGe228a7820 [2022-11-16 12:27:23,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/data/dcd959b7c/91b8271368634d1dabfeadca3152e486 [2022-11-16 12:27:23,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:27:23,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:27:23,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:27:23,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:27:23,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:27:23,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@464d068b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23, skipping insertion in model container [2022-11-16 12:27:23,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:27:23,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:27:23,664 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_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-11-16 12:27:23,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:27:23,708 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:27:23,747 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_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-11-16 12:27:23,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:27:23,825 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:27:23,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23 WrapperNode [2022-11-16 12:27:23,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:27:23,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:27:23,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:27:23,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:27:23,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,873 INFO L138 Inliner]: procedures = 273, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2022-11-16 12:27:23,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:27:23,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:27:23,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:27:23,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:27:23,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,900 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:27:23,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:27:23,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:27:23,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:27:23,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (1/1) ... [2022-11-16 12:27:23,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:27:23,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:23,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:27:23,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:27:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:27:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:27:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:27:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:27:23,996 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 12:27:23,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:27:23,996 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 12:27:23,998 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 12:27:23,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:27:23,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:27:23,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:27:24,001 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 12:27:24,160 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:27:24,162 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:27:24,405 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:27:24,413 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:27:24,413 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-16 12:27:24,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:27:24 BoogieIcfgContainer [2022-11-16 12:27:24,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:27:24,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:27:24,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:27:24,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:27:24,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:27:23" (1/3) ... [2022-11-16 12:27:24,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c785b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:27:24, skipping insertion in model container [2022-11-16 12:27:24,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:27:23" (2/3) ... [2022-11-16 12:27:24,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c785b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:27:24, skipping insertion in model container [2022-11-16 12:27:24,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:27:24" (3/3) ... [2022-11-16 12:27:24,424 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2022-11-16 12:27:24,432 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:27:24,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:27:24,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:27:24,489 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:27:24,558 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 12:27:24,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 128 transitions, 264 flow [2022-11-16 12:27:24,677 INFO L130 PetriNetUnfolder]: 17/168 cut-off events. [2022-11-16 12:27:24,678 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-16 12:27:24,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 168 events. 17/168 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 395 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 84. Up to 4 conditions per place. [2022-11-16 12:27:24,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 128 transitions, 264 flow [2022-11-16 12:27:24,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 123 transitions, 251 flow [2022-11-16 12:27:24,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:27:24,715 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;@5a305a17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:27:24,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:27:24,742 INFO L130 PetriNetUnfolder]: 3/91 cut-off events. [2022-11-16 12:27:24,742 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:27:24,742 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:24,743 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] [2022-11-16 12:27:24,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash -153594985, now seen corresponding path program 1 times [2022-11-16 12:27:24,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:24,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657217799] [2022-11-16 12:27:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:24,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:24,993 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 12:27:24,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:24,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657217799] [2022-11-16 12:27:24,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657217799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:24,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:24,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:27:24,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193122387] [2022-11-16 12:27:24,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:25,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:27:25,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:27:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:27:25,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 128 [2022-11-16 12:27:25,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 251 flow. Second operand has 2 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:25,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 128 [2022-11-16 12:27:25,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:25,098 INFO L130 PetriNetUnfolder]: 0/145 cut-off events. [2022-11-16 12:27:25,099 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:27:25,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 145 events. 0/145 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 227 event pairs, 0 based on Foata normal form. 16/155 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-16 12:27:25,100 INFO L137 encePairwiseOnDemand]: 117/128 looper letters, 1 selfloop transitions, 0 changer transitions 15/111 dead transitions. [2022-11-16 12:27:25,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 111 transitions, 229 flow [2022-11-16 12:27:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:27:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:27:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 240 transitions. [2022-11-16 12:27:25,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9375 [2022-11-16 12:27:25,114 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 240 transitions. [2022-11-16 12:27:25,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 240 transitions. [2022-11-16 12:27:25,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:25,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 240 transitions. [2022-11-16 12:27:25,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 120.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,126 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,128 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 251 flow. Second operand 2 states and 240 transitions. [2022-11-16 12:27:25,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 111 transitions, 229 flow [2022-11-16 12:27:25,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 111 transitions, 229 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:25,135 INFO L231 Difference]: Finished difference. Result has 115 places, 96 transitions, 197 flow [2022-11-16 12:27:25,137 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=197, PETRI_PLACES=115, PETRI_TRANSITIONS=96} [2022-11-16 12:27:25,140 INFO L288 CegarLoopForPetriNet]: 115 programPoint places, 0 predicate places. [2022-11-16 12:27:25,140 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 96 transitions, 197 flow [2022-11-16 12:27:25,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,141 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:25,141 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] [2022-11-16 12:27:25,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:27:25,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:25,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1353956824, now seen corresponding path program 1 times [2022-11-16 12:27:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:25,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521025242] [2022-11-16 12:27:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:25,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:25,383 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 12:27:25,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521025242] [2022-11-16 12:27:25,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521025242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:25,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:25,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087953956] [2022-11-16 12:27:25,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:25,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:27:25,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:25,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:27:25,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:25,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 128 [2022-11-16 12:27:25,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:25,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 128 [2022-11-16 12:27:25,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:25,479 INFO L130 PetriNetUnfolder]: 0/100 cut-off events. [2022-11-16 12:27:25,480 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:27:25,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 100 events. 0/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 58 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-16 12:27:25,481 INFO L137 encePairwiseOnDemand]: 125/128 looper letters, 8 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2022-11-16 12:27:25,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 98 transitions, 221 flow [2022-11-16 12:27:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:27:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:27:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2022-11-16 12:27:25,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8645833333333334 [2022-11-16 12:27:25,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2022-11-16 12:27:25,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2022-11-16 12:27:25,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:25,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2022-11-16 12:27:25,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,489 INFO L175 Difference]: Start difference. First operand has 115 places, 96 transitions, 197 flow. Second operand 3 states and 332 transitions. [2022-11-16 12:27:25,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 98 transitions, 221 flow [2022-11-16 12:27:25,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 221 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:25,493 INFO L231 Difference]: Finished difference. Result has 103 places, 96 transitions, 205 flow [2022-11-16 12:27:25,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=103, PETRI_TRANSITIONS=96} [2022-11-16 12:27:25,494 INFO L288 CegarLoopForPetriNet]: 115 programPoint places, -12 predicate places. [2022-11-16 12:27:25,494 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 96 transitions, 205 flow [2022-11-16 12:27:25,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:25,495 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:25,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:27:25,495 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2085547297, now seen corresponding path program 1 times [2022-11-16 12:27:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:25,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228802050] [2022-11-16 12:27:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:27:25,529 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:27:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:27:25,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:27:25,589 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:27:25,591 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:27:25,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:27:25,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:27:25,593 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:27:25,597 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:27:25,597 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:27:25,661 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:27:25,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 169 transitions, 356 flow [2022-11-16 12:27:25,717 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2022-11-16 12:27:25,717 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-16 12:27:25,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 274 events. 31/274 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 851 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2022-11-16 12:27:25,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 169 transitions, 356 flow [2022-11-16 12:27:25,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 169 transitions, 356 flow [2022-11-16 12:27:25,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:27:25,726 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;@5a305a17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:27:25,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:27:25,739 INFO L130 PetriNetUnfolder]: 3/91 cut-off events. [2022-11-16 12:27:25,739 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:27:25,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:25,740 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] [2022-11-16 12:27:25,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:25,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:25,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1597804759, now seen corresponding path program 1 times [2022-11-16 12:27:25,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:25,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010356344] [2022-11-16 12:27:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:25,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:25,780 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 12:27:25,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:25,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010356344] [2022-11-16 12:27:25,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010356344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:25,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:25,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:27:25,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945801182] [2022-11-16 12:27:25,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:25,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:27:25,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:27:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:27:25,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 169 [2022-11-16 12:27:25,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 169 transitions, 356 flow. Second operand has 2 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:25,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 169 [2022-11-16 12:27:25,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:25,856 INFO L130 PetriNetUnfolder]: 3/243 cut-off events. [2022-11-16 12:27:25,857 INFO L131 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-11-16 12:27:25,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 243 events. 3/243 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 623 event pairs, 0 based on Foata normal form. 40/273 useless extension candidates. Maximal degree in co-relation 154. Up to 7 conditions per place. [2022-11-16 12:27:25,859 INFO L137 encePairwiseOnDemand]: 152/169 looper letters, 2 selfloop transitions, 0 changer transitions 21/151 dead transitions. [2022-11-16 12:27:25,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 151 transitions, 328 flow [2022-11-16 12:27:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:27:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:27:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 315 transitions. [2022-11-16 12:27:25,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9319526627218935 [2022-11-16 12:27:25,863 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 315 transitions. [2022-11-16 12:27:25,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 315 transitions. [2022-11-16 12:27:25,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:25,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 315 transitions. [2022-11-16 12:27:25,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 157.5) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,868 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,868 INFO L175 Difference]: Start difference. First operand has 155 places, 169 transitions, 356 flow. Second operand 2 states and 315 transitions. [2022-11-16 12:27:25,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 151 transitions, 328 flow [2022-11-16 12:27:25,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 151 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:25,874 INFO L231 Difference]: Finished difference. Result has 155 places, 130 transitions, 272 flow [2022-11-16 12:27:25,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=272, PETRI_PLACES=155, PETRI_TRANSITIONS=130} [2022-11-16 12:27:25,878 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-11-16 12:27:25,878 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 130 transitions, 272 flow [2022-11-16 12:27:25,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:25,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:25,879 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:25,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:27:25,879 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1189610728, now seen corresponding path program 1 times [2022-11-16 12:27:25,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:25,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200509564] [2022-11-16 12:27:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:25,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:26,010 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 12:27:26,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:26,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200509564] [2022-11-16 12:27:26,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200509564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:26,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:26,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:26,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961796920] [2022-11-16 12:27:26,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:26,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:27:26,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:27:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:26,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 169 [2022-11-16 12:27:26,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 130 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:26,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 169 [2022-11-16 12:27:26,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:26,073 INFO L130 PetriNetUnfolder]: 0/158 cut-off events. [2022-11-16 12:27:26,073 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:27:26,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 158 events. 0/158 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 257 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-16 12:27:26,074 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 11 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2022-11-16 12:27:26,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 134 transitions, 306 flow [2022-11-16 12:27:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:27:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:27:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2022-11-16 12:27:26,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8560157790927022 [2022-11-16 12:27:26,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2022-11-16 12:27:26,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2022-11-16 12:27:26,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:26,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2022-11-16 12:27:26,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,082 INFO L175 Difference]: Start difference. First operand has 155 places, 130 transitions, 272 flow. Second operand 3 states and 434 transitions. [2022-11-16 12:27:26,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 134 transitions, 306 flow [2022-11-16 12:27:26,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 134 transitions, 304 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:26,088 INFO L231 Difference]: Finished difference. Result has 139 places, 131 transitions, 282 flow [2022-11-16 12:27:26,088 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=139, PETRI_TRANSITIONS=131} [2022-11-16 12:27:26,090 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, -16 predicate places. [2022-11-16 12:27:26,090 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 131 transitions, 282 flow [2022-11-16 12:27:26,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:26,091 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:26,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:27:26,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash -228766934, now seen corresponding path program 1 times [2022-11-16 12:27:26,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:26,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37126277] [2022-11-16 12:27:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:27:26,142 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:27:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:27:26,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:27:26,176 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:27:26,176 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:27:26,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:27:26,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:27:26,177 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:27:26,178 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:27:26,178 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:27:26,208 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:27:26,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 210 transitions, 450 flow [2022-11-16 12:27:26,278 INFO L130 PetriNetUnfolder]: 50/413 cut-off events. [2022-11-16 12:27:26,279 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-16 12:27:26,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 413 events. 50/413 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1477 event pairs, 1 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2022-11-16 12:27:26,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 210 transitions, 450 flow [2022-11-16 12:27:26,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 210 transitions, 450 flow [2022-11-16 12:27:26,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:27:26,298 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;@5a305a17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:27:26,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:27:26,310 INFO L130 PetriNetUnfolder]: 3/91 cut-off events. [2022-11-16 12:27:26,310 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:27:26,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:26,310 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] [2022-11-16 12:27:26,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:26,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1003973463, now seen corresponding path program 1 times [2022-11-16 12:27:26,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:26,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36897999] [2022-11-16 12:27:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:26,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:26,363 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 12:27:26,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36897999] [2022-11-16 12:27:26,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36897999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:26,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:26,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:27:26,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476034095] [2022-11-16 12:27:26,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:26,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:27:26,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:27:26,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:27:26,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 210 [2022-11-16 12:27:26,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 210 transitions, 450 flow. Second operand has 2 states, 2 states have (on average 180.5) internal successors, (361), 2 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:26,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 210 [2022-11-16 12:27:26,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:26,474 INFO L130 PetriNetUnfolder]: 8/367 cut-off events. [2022-11-16 12:27:26,474 INFO L131 PetriNetUnfolder]: For 50/59 co-relation queries the response was YES. [2022-11-16 12:27:26,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 367 events. 8/367 cut-off events. For 50/59 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1205 event pairs, 1 based on Foata normal form. 99/450 useless extension candidates. Maximal degree in co-relation 257. Up to 16 conditions per place. [2022-11-16 12:27:26,477 INFO L137 encePairwiseOnDemand]: 187/210 looper letters, 3 selfloop transitions, 0 changer transitions 22/186 dead transitions. [2022-11-16 12:27:26,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 186 transitions, 414 flow [2022-11-16 12:27:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:27:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:27:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 389 transitions. [2022-11-16 12:27:26,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9261904761904762 [2022-11-16 12:27:26,479 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 389 transitions. [2022-11-16 12:27:26,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 389 transitions. [2022-11-16 12:27:26,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:26,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 389 transitions. [2022-11-16 12:27:26,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 194.5) internal successors, (389), 2 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,483 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,483 INFO L175 Difference]: Start difference. First operand has 191 places, 210 transitions, 450 flow. Second operand 2 states and 389 transitions. [2022-11-16 12:27:26,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 186 transitions, 414 flow [2022-11-16 12:27:26,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 186 transitions, 414 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:26,489 INFO L231 Difference]: Finished difference. Result has 191 places, 164 transitions, 349 flow [2022-11-16 12:27:26,489 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=349, PETRI_PLACES=191, PETRI_TRANSITIONS=164} [2022-11-16 12:27:26,492 INFO L288 CegarLoopForPetriNet]: 191 programPoint places, 0 predicate places. [2022-11-16 12:27:26,492 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 164 transitions, 349 flow [2022-11-16 12:27:26,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 180.5) internal successors, (361), 2 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:26,493 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] [2022-11-16 12:27:26,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:27:26,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1783442024, now seen corresponding path program 1 times [2022-11-16 12:27:26,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:26,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960523593] [2022-11-16 12:27:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:26,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:26,579 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 12:27:26,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:26,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960523593] [2022-11-16 12:27:26,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960523593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:26,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:26,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:26,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442982220] [2022-11-16 12:27:26,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:26,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:27:26,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:26,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:27:26,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:26,593 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 210 [2022-11-16 12:27:26,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 164 transitions, 349 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:26,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 210 [2022-11-16 12:27:26,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:26,653 INFO L130 PetriNetUnfolder]: 0/216 cut-off events. [2022-11-16 12:27:26,654 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:27:26,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 216 events. 0/216 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 506 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-16 12:27:26,655 INFO L137 encePairwiseOnDemand]: 207/210 looper letters, 12 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-11-16 12:27:26,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 168 transitions, 385 flow [2022-11-16 12:27:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:27:26,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:27:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2022-11-16 12:27:26,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8476190476190476 [2022-11-16 12:27:26,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2022-11-16 12:27:26,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2022-11-16 12:27:26,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:26,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2022-11-16 12:27:26,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,661 INFO L175 Difference]: Start difference. First operand has 191 places, 164 transitions, 349 flow. Second operand 3 states and 534 transitions. [2022-11-16 12:27:26,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 168 transitions, 385 flow [2022-11-16 12:27:26,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 168 transitions, 379 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:26,667 INFO L231 Difference]: Finished difference. Result has 175 places, 165 transitions, 355 flow [2022-11-16 12:27:26,667 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=355, PETRI_PLACES=175, PETRI_TRANSITIONS=165} [2022-11-16 12:27:26,668 INFO L288 CegarLoopForPetriNet]: 191 programPoint places, -16 predicate places. [2022-11-16 12:27:26,669 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 165 transitions, 355 flow [2022-11-16 12:27:26,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:26,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:26,669 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:26,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:27:26,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 390083065, now seen corresponding path program 1 times [2022-11-16 12:27:26,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:26,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772415974] [2022-11-16 12:27:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:26,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:26,825 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 12:27:26,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772415974] [2022-11-16 12:27:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772415974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:27:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398610364] [2022-11-16 12:27:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:26,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:26,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:26,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:26,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:27:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:26,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:27:26,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:27,036 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 12:27:27,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:27:27,084 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 12:27:27,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398610364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:27:27,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:27:27,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:27:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665568966] [2022-11-16 12:27:27,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:27:27,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:27:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:27:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:27:27,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 210 [2022-11-16 12:27:27,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 165 transitions, 355 flow. Second operand has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:27,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:27,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 210 [2022-11-16 12:27:27,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:27,206 INFO L130 PetriNetUnfolder]: 0/186 cut-off events. [2022-11-16 12:27:27,206 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-16 12:27:27,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 186 events. 0/186 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 316 event pairs, 0 based on Foata normal form. 2/188 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-16 12:27:27,207 INFO L137 encePairwiseOnDemand]: 204/210 looper letters, 13 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-11-16 12:27:27,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 175 transitions, 421 flow [2022-11-16 12:27:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:27:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:27:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1572 transitions. [2022-11-16 12:27:27,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-11-16 12:27:27,212 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1572 transitions. [2022-11-16 12:27:27,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1572 transitions. [2022-11-16 12:27:27,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:27,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1572 transitions. [2022-11-16 12:27:27,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:27,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:27,222 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:27,222 INFO L175 Difference]: Start difference. First operand has 175 places, 165 transitions, 355 flow. Second operand 9 states and 1572 transitions. [2022-11-16 12:27:27,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 175 transitions, 421 flow [2022-11-16 12:27:27,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 175 transitions, 419 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:27:27,227 INFO L231 Difference]: Finished difference. Result has 185 places, 171 transitions, 403 flow [2022-11-16 12:27:27,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=403, PETRI_PLACES=185, PETRI_TRANSITIONS=171} [2022-11-16 12:27:27,228 INFO L288 CegarLoopForPetriNet]: 191 programPoint places, -6 predicate places. [2022-11-16 12:27:27,228 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 171 transitions, 403 flow [2022-11-16 12:27:27,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:27,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:27,229 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:27,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:27,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:27,439 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:27,440 INFO L85 PathProgramCache]: Analyzing trace with hash 656296578, now seen corresponding path program 1 times [2022-11-16 12:27:27,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:27,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779549019] [2022-11-16 12:27:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:27,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:27:27,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:27:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:27:27,522 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:27:27,522 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:27:27,523 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:27:27,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:27:27,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:27:27,524 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:27:27,524 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:27:27,525 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 12:27:27,581 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:27:27,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 251 transitions, 546 flow [2022-11-16 12:27:27,709 INFO L130 PetriNetUnfolder]: 81/620 cut-off events. [2022-11-16 12:27:27,710 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-11-16 12:27:27,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 620 events. 81/620 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2552 event pairs, 6 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 433. Up to 32 conditions per place. [2022-11-16 12:27:27,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 251 transitions, 546 flow [2022-11-16 12:27:27,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 251 transitions, 546 flow [2022-11-16 12:27:27,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:27:27,729 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;@5a305a17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:27:27,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:27:27,739 INFO L130 PetriNetUnfolder]: 3/91 cut-off events. [2022-11-16 12:27:27,740 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:27:27,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:27,740 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] [2022-11-16 12:27:27,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1935088873, now seen corresponding path program 1 times [2022-11-16 12:27:27,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:27,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106617135] [2022-11-16 12:27:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:27,783 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 12:27:27,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:27,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106617135] [2022-11-16 12:27:27,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106617135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:27,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:27,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:27:27,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672320340] [2022-11-16 12:27:27,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:27,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:27:27,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:27:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:27:27,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 251 [2022-11-16 12:27:27,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 251 transitions, 546 flow. Second operand has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:27,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:27,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 251 [2022-11-16 12:27:27,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:27,946 INFO L130 PetriNetUnfolder]: 21/555 cut-off events. [2022-11-16 12:27:27,946 INFO L131 PetriNetUnfolder]: For 126/150 co-relation queries the response was YES. [2022-11-16 12:27:27,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 555 events. 21/555 cut-off events. For 126/150 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2268 event pairs, 6 based on Foata normal form. 240/769 useless extension candidates. Maximal degree in co-relation 402. Up to 37 conditions per place. [2022-11-16 12:27:27,951 INFO L137 encePairwiseOnDemand]: 222/251 looper letters, 4 selfloop transitions, 0 changer transitions 23/221 dead transitions. [2022-11-16 12:27:27,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 221 transitions, 502 flow [2022-11-16 12:27:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:27:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:27:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-11-16 12:27:27,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9223107569721115 [2022-11-16 12:27:27,954 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-11-16 12:27:27,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-11-16 12:27:27,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:27,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-11-16 12:27:27,955 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 12:27:27,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:27,957 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:27,957 INFO L175 Difference]: Start difference. First operand has 227 places, 251 transitions, 546 flow. Second operand 2 states and 463 transitions. [2022-11-16 12:27:27,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 221 transitions, 502 flow [2022-11-16 12:27:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 221 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:27,962 INFO L231 Difference]: Finished difference. Result has 227 places, 198 transitions, 428 flow [2022-11-16 12:27:27,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=428, PETRI_PLACES=227, PETRI_TRANSITIONS=198} [2022-11-16 12:27:27,964 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, 0 predicate places. [2022-11-16 12:27:27,964 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 198 transitions, 428 flow [2022-11-16 12:27:27,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:27,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:27,965 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] [2022-11-16 12:27:27,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:27:27,965 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash -427537064, now seen corresponding path program 1 times [2022-11-16 12:27:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:27,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617034076] [2022-11-16 12:27:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:27,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:28,033 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 12:27:28,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:28,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617034076] [2022-11-16 12:27:28,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617034076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:28,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:28,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:28,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264565162] [2022-11-16 12:27:28,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:28,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:27:28,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:27:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:28,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 251 [2022-11-16 12:27:28,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 198 transitions, 428 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:28,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 251 [2022-11-16 12:27:28,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:28,106 INFO L130 PetriNetUnfolder]: 0/274 cut-off events. [2022-11-16 12:27:28,106 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 12:27:28,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 274 events. 0/274 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 764 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-16 12:27:28,107 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 13 selfloop transitions, 2 changer transitions 0/202 dead transitions. [2022-11-16 12:27:28,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 466 flow [2022-11-16 12:27:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:27:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:27:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 634 transitions. [2022-11-16 12:27:28,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8419654714475432 [2022-11-16 12:27:28,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 634 transitions. [2022-11-16 12:27:28,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 634 transitions. [2022-11-16 12:27:28,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:28,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 634 transitions. [2022-11-16 12:27:28,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,114 INFO L175 Difference]: Start difference. First operand has 227 places, 198 transitions, 428 flow. Second operand 3 states and 634 transitions. [2022-11-16 12:27:28,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 466 flow [2022-11-16 12:27:28,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 202 transitions, 454 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:28,120 INFO L231 Difference]: Finished difference. Result has 211 places, 199 transitions, 428 flow [2022-11-16 12:27:28,120 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=211, PETRI_TRANSITIONS=199} [2022-11-16 12:27:28,121 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, -16 predicate places. [2022-11-16 12:27:28,122 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 199 transitions, 428 flow [2022-11-16 12:27:28,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,122 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:28,122 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:28,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:27:28,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:28,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1846440640, now seen corresponding path program 1 times [2022-11-16 12:27:28,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:28,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797854149] [2022-11-16 12:27:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:28,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:28,226 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 12:27:28,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:28,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797854149] [2022-11-16 12:27:28,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797854149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:27:28,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640733193] [2022-11-16 12:27:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:28,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:28,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:28,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:28,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:27:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:28,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:27:28,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:28,424 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 12:27:28,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:27:28,479 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 12:27:28,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640733193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:27:28,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:27:28,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:27:28,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215251102] [2022-11-16 12:27:28,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:27:28,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:27:28,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:28,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:27:28,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:27:28,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 251 [2022-11-16 12:27:28,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 199 transitions, 428 flow. Second operand has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:28,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 251 [2022-11-16 12:27:28,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:28,633 INFO L130 PetriNetUnfolder]: 0/244 cut-off events. [2022-11-16 12:27:28,633 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 12:27:28,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 244 events. 0/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 572 event pairs, 0 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-16 12:27:28,634 INFO L137 encePairwiseOnDemand]: 245/251 looper letters, 14 selfloop transitions, 9 changer transitions 0/209 dead transitions. [2022-11-16 12:27:28,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 209 transitions, 496 flow [2022-11-16 12:27:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:27:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:27:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1870 transitions. [2022-11-16 12:27:28,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8277999114652501 [2022-11-16 12:27:28,640 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1870 transitions. [2022-11-16 12:27:28,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1870 transitions. [2022-11-16 12:27:28,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:28,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1870 transitions. [2022-11-16 12:27:28,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.77777777777777) internal successors, (1870), 9 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,650 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,650 INFO L175 Difference]: Start difference. First operand has 211 places, 199 transitions, 428 flow. Second operand 9 states and 1870 transitions. [2022-11-16 12:27:28,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 209 transitions, 496 flow [2022-11-16 12:27:28,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 209 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:27:28,655 INFO L231 Difference]: Finished difference. Result has 221 places, 205 transitions, 476 flow [2022-11-16 12:27:28,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=476, PETRI_PLACES=221, PETRI_TRANSITIONS=205} [2022-11-16 12:27:28,656 INFO L288 CegarLoopForPetriNet]: 227 programPoint places, -6 predicate places. [2022-11-16 12:27:28,656 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 205 transitions, 476 flow [2022-11-16 12:27:28,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:28,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:28,657 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:28,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:28,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:28,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1220676471, now seen corresponding path program 1 times [2022-11-16 12:27:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:28,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670135708] [2022-11-16 12:27:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:28,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:27:28,886 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:27:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:27:28,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:27:28,926 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:27:28,926 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:27:28,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:27:28,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:27:28,927 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:27:28,928 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:27:28,928 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 12:27:28,970 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-16 12:27:28,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 292 transitions, 644 flow [2022-11-16 12:27:29,215 INFO L130 PetriNetUnfolder]: 140/967 cut-off events. [2022-11-16 12:27:29,216 INFO L131 PetriNetUnfolder]: For 110/115 co-relation queries the response was YES. [2022-11-16 12:27:29,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 967 events. 140/967 cut-off events. For 110/115 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4568 event pairs, 23 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 665. Up to 80 conditions per place. [2022-11-16 12:27:29,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 292 transitions, 644 flow [2022-11-16 12:27:29,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 292 transitions, 644 flow [2022-11-16 12:27:29,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:27:29,242 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;@5a305a17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:27:29,242 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:27:29,249 INFO L130 PetriNetUnfolder]: 3/91 cut-off events. [2022-11-16 12:27:29,249 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:27:29,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:29,250 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] [2022-11-16 12:27:29,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1370552343, now seen corresponding path program 1 times [2022-11-16 12:27:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:29,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891806861] [2022-11-16 12:27:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:29,273 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 12:27:29,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891806861] [2022-11-16 12:27:29,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891806861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:29,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:29,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:27:29,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797640467] [2022-11-16 12:27:29,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:29,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:27:29,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:29,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:27:29,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:27:29,275 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 292 [2022-11-16 12:27:29,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 292 transitions, 644 flow. Second operand has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:29,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 292 [2022-11-16 12:27:29,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:29,507 INFO L130 PetriNetUnfolder]: 54/875 cut-off events. [2022-11-16 12:27:29,507 INFO L131 PetriNetUnfolder]: For 286/307 co-relation queries the response was YES. [2022-11-16 12:27:29,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 875 events. 54/875 cut-off events. For 286/307 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4181 event pairs, 23 based on Foata normal form. 563/1394 useless extension candidates. Maximal degree in co-relation 636. Up to 86 conditions per place. [2022-11-16 12:27:29,518 INFO L137 encePairwiseOnDemand]: 257/292 looper letters, 5 selfloop transitions, 0 changer transitions 24/256 dead transitions. [2022-11-16 12:27:29,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 256 transitions, 592 flow [2022-11-16 12:27:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:27:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:27:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 537 transitions. [2022-11-16 12:27:29,520 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9195205479452054 [2022-11-16 12:27:29,521 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 537 transitions. [2022-11-16 12:27:29,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 537 transitions. [2022-11-16 12:27:29,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:29,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 537 transitions. [2022-11-16 12:27:29,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 268.5) internal successors, (537), 2 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,524 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,524 INFO L175 Difference]: Start difference. First operand has 263 places, 292 transitions, 644 flow. Second operand 2 states and 537 transitions. [2022-11-16 12:27:29,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 256 transitions, 592 flow [2022-11-16 12:27:29,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 256 transitions, 592 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:29,530 INFO L231 Difference]: Finished difference. Result has 263 places, 232 transitions, 509 flow [2022-11-16 12:27:29,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=509, PETRI_PLACES=263, PETRI_TRANSITIONS=232} [2022-11-16 12:27:29,532 INFO L288 CegarLoopForPetriNet]: 263 programPoint places, 0 predicate places. [2022-11-16 12:27:29,532 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 232 transitions, 509 flow [2022-11-16 12:27:29,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:29,532 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] [2022-11-16 12:27:29,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:27:29,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:29,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:29,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1416863144, now seen corresponding path program 1 times [2022-11-16 12:27:29,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:29,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059770434] [2022-11-16 12:27:29,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:29,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:29,593 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 12:27:29,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059770434] [2022-11-16 12:27:29,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059770434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:29,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:29,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:29,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632436944] [2022-11-16 12:27:29,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:29,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:27:29,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:29,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:27:29,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:27:29,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 292 [2022-11-16 12:27:29,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 232 transitions, 509 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:29,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 292 [2022-11-16 12:27:29,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:29,711 INFO L130 PetriNetUnfolder]: 0/332 cut-off events. [2022-11-16 12:27:29,711 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 12:27:29,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 332 events. 0/332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1022 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-16 12:27:29,712 INFO L137 encePairwiseOnDemand]: 289/292 looper letters, 14 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-11-16 12:27:29,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 236 transitions, 549 flow [2022-11-16 12:27:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:27:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:27:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-11-16 12:27:29,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8378995433789954 [2022-11-16 12:27:29,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-11-16 12:27:29,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-11-16 12:27:29,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:29,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-11-16 12:27:29,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,722 INFO L175 Difference]: Start difference. First operand has 263 places, 232 transitions, 509 flow. Second operand 3 states and 734 transitions. [2022-11-16 12:27:29,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 236 transitions, 549 flow [2022-11-16 12:27:29,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 236 transitions, 529 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-16 12:27:29,728 INFO L231 Difference]: Finished difference. Result has 247 places, 233 transitions, 501 flow [2022-11-16 12:27:29,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=501, PETRI_PLACES=247, PETRI_TRANSITIONS=233} [2022-11-16 12:27:29,729 INFO L288 CegarLoopForPetriNet]: 263 programPoint places, -16 predicate places. [2022-11-16 12:27:29,729 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 233 transitions, 501 flow [2022-11-16 12:27:29,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:29,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:29,732 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:29,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:27:29,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash -216383641, now seen corresponding path program 1 times [2022-11-16 12:27:29,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:29,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041596858] [2022-11-16 12:27:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:29,811 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 12:27:29,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:29,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041596858] [2022-11-16 12:27:29,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041596858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:27:29,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105854670] [2022-11-16 12:27:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:29,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:29,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:29,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:29,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:27:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:27:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:29,988 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 12:27:29,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:27:30,025 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 12:27:30,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105854670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:27:30,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:27:30,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:27:30,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201489551] [2022-11-16 12:27:30,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:27:30,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:27:30,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:27:30,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:27:30,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 292 [2022-11-16 12:27:30,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 233 transitions, 501 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:30,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:30,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 292 [2022-11-16 12:27:30,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:27:30,163 INFO L130 PetriNetUnfolder]: 0/302 cut-off events. [2022-11-16 12:27:30,163 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:27:30,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 302 events. 0/302 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 830 event pairs, 0 based on Foata normal form. 2/304 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 12:27:30,165 INFO L137 encePairwiseOnDemand]: 286/292 looper letters, 15 selfloop transitions, 9 changer transitions 0/243 dead transitions. [2022-11-16 12:27:30,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 243 transitions, 571 flow [2022-11-16 12:27:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:27:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:27:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2168 transitions. [2022-11-16 12:27:30,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8249619482496194 [2022-11-16 12:27:30,180 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2168 transitions. [2022-11-16 12:27:30,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2168 transitions. [2022-11-16 12:27:30,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:27:30,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2168 transitions. [2022-11-16 12:27:30,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 240.88888888888889) internal successors, (2168), 9 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:30,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:30,191 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:30,191 INFO L175 Difference]: Start difference. First operand has 247 places, 233 transitions, 501 flow. Second operand 9 states and 2168 transitions. [2022-11-16 12:27:30,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 243 transitions, 571 flow [2022-11-16 12:27:30,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 243 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:27:30,196 INFO L231 Difference]: Finished difference. Result has 257 places, 239 transitions, 549 flow [2022-11-16 12:27:30,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=257, PETRI_TRANSITIONS=239} [2022-11-16 12:27:30,197 INFO L288 CegarLoopForPetriNet]: 263 programPoint places, -6 predicate places. [2022-11-16 12:27:30,197 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 239 transitions, 549 flow [2022-11-16 12:27:30,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:30,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:27:30,198 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:30,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:30,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62e129c-49e2-4dac-bd8e-19b5d9c4bb01/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:27:30,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:27:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash 204261512, now seen corresponding path program 1 times [2022-11-16 12:27:30,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:30,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52842827] [2022-11-16 12:27:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:30,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:27:30,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:30,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52842827] [2022-11-16 12:27:30,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52842827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:30,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:30,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:27:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595465359] [2022-11-16 12:27:30,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:30,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:27:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:27:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:27:30,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 292 [2022-11-16 12:27:30,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 239 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:30,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:30,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 292 [2022-11-16 12:27:30,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand