./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8 --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 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 --- 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-2329fc7 [2022-12-13 14:31:41,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:31:41,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:31:41,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:31:41,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:31:41,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:31:41,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:31:41,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:31:41,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:31:41,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:31:41,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:31:41,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:31:41,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:31:41,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:31:41,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:31:41,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:31:41,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:31:41,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:31:41,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:31:41,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:31:41,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:31:41,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:31:41,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:31:41,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:31:41,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:31:41,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:31:41,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:31:41,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:31:41,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:31:41,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:31:41,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:31:41,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:31:41,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:31:41,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:31:41,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:31:41,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:31:41,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:31:41,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:31:41,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:31:41,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:31:41,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:31:41,685 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:31:41,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:31:41,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:31:41,701 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:31:41,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:31:41,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:31:41,702 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:31:41,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:31:41,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:31:41,703 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:31:41,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:31:41,703 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:31:41,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:31:41,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:31:41,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:31:41,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:31:41,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:31:41,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:31:41,704 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:31:41,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:31:41,705 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:31:41,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:31:41,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:31:41,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:31:41,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:31:41,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:31:41,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:31:41,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:31:41,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:31:41,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:31:41,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:31:41,707 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:31:41,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:31:41,707 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:31:41,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:31:41,707 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:31:41,707 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 [2022-12-13 14:31:41,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:31:41,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:31:41,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:31:41,886 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:31:41,886 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:31:41,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2022-12-13 14:31:44,485 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:31:44,661 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:31:44,662 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2022-12-13 14:31:44,671 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/data/9ecef44ae/46e53c5c73d24328b7cd764bfe7be6c0/FLAG785c5573c [2022-12-13 14:31:44,681 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/data/9ecef44ae/46e53c5c73d24328b7cd764bfe7be6c0 [2022-12-13 14:31:44,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:31:44,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:31:44,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:31:44,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:31:44,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:31:44,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:31:44" (1/1) ... [2022-12-13 14:31:44,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ada38bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:44, skipping insertion in model container [2022-12-13 14:31:44,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:31:44" (1/1) ... [2022-12-13 14:31:44,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:31:44,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:31:44,917 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2022-12-13 14:31:44,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:31:44,951 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:31:44,978 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2022-12-13 14:31:44,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:31:45,011 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:31:45,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45 WrapperNode [2022-12-13 14:31:45,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:31:45,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:31:45,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:31:45,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:31:45,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,047 INFO L138 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2022-12-13 14:31:45,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:31:45,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:31:45,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:31:45,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:31:45,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,076 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:31:45,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:31:45,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:31:45,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:31:45,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (1/1) ... [2022-12-13 14:31:45,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:31:45,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:31:45,107 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:31:45,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:31:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:31:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:31:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 14:31:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:31:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:31:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 14:31:45,137 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 14:31:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:31:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-12-13 14:31:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:31:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:31:45,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:31:45,139 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:31:45,240 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:31:45,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:31:45,477 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:31:45,486 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:31:45,486 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-12-13 14:31:45,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:31:45 BoogieIcfgContainer [2022-12-13 14:31:45,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:31:45,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:31:45,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:31:45,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:31:45,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:31:44" (1/3) ... [2022-12-13 14:31:45,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0dabf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:31:45, skipping insertion in model container [2022-12-13 14:31:45,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:31:45" (2/3) ... [2022-12-13 14:31:45,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0dabf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:31:45, skipping insertion in model container [2022-12-13 14:31:45,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:31:45" (3/3) ... [2022-12-13 14:31:45,498 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2022-12-13 14:31:45,507 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 14:31:45,517 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:31:45,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-12-13 14:31:45,517 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:31:45,574 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 14:31:45,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 196 transitions, 400 flow [2022-12-13 14:31:45,705 INFO L130 PetriNetUnfolder]: 45/290 cut-off events. [2022-12-13 14:31:45,705 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:31:45,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 290 events. 45/290 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1130 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 152. Up to 6 conditions per place. [2022-12-13 14:31:45,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 196 transitions, 400 flow [2022-12-13 14:31:45,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 191 transitions, 387 flow [2022-12-13 14:31:45,723 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:31:45,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 191 transitions, 387 flow [2022-12-13 14:31:45,734 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 191 transitions, 387 flow [2022-12-13 14:31:45,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 191 transitions, 387 flow [2022-12-13 14:31:45,784 INFO L130 PetriNetUnfolder]: 44/285 cut-off events. [2022-12-13 14:31:45,784 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:31:45,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 285 events. 44/285 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1109 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 152. Up to 6 conditions per place. [2022-12-13 14:31:45,790 INFO L119 LiptonReduction]: Number of co-enabled transitions 10600 [2022-12-13 14:31:48,521 INFO L134 LiptonReduction]: Checked pairs total: 21645 [2022-12-13 14:31:48,521 INFO L136 LiptonReduction]: Total number of compositions: 157 [2022-12-13 14:31:48,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:31:48,536 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;@289485fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:31:48,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 14:31:48,538 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 14:31:48,538 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:31:48,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:31:48,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:31:48,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:31:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:31:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash 23117004, now seen corresponding path program 1 times [2022-12-13 14:31:48,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:31:48,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944812667] [2022-12-13 14:31:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:48,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:31:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:31:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:48,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:31:48,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944812667] [2022-12-13 14:31:48,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944812667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:31:48,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:31:48,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:31:48,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588555097] [2022-12-13 14:31:48,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:31:48,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:31:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:31:48,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:31:48,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:31:48,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 353 [2022-12-13 14:31:48,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 68 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:48,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:31:48,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 353 [2022-12-13 14:31:48,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:31:48,874 INFO L130 PetriNetUnfolder]: 361/798 cut-off events. [2022-12-13 14:31:48,874 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:31:48,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1566 conditions, 798 events. 361/798 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4031 event pairs, 0 based on Foata normal form. 64/766 useless extension candidates. Maximal degree in co-relation 1523. Up to 730 conditions per place. [2022-12-13 14:31:48,878 INFO L137 encePairwiseOnDemand]: 329/353 looper letters, 52 selfloop transitions, 2 changer transitions 4/63 dead transitions. [2022-12-13 14:31:48,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 63 transitions, 245 flow [2022-12-13 14:31:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:31:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:31:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-12-13 14:31:48,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5363550519357885 [2022-12-13 14:31:48,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-12-13 14:31:48,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-12-13 14:31:48,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:31:48,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-12-13 14:31:48,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:48,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:48,901 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:48,902 INFO L175 Difference]: Start difference. First operand has 50 places, 68 transitions, 141 flow. Second operand 3 states and 568 transitions. [2022-12-13 14:31:48,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 63 transitions, 245 flow [2022-12-13 14:31:48,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:31:48,906 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 99 flow [2022-12-13 14:31:48,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-12-13 14:31:48,910 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2022-12-13 14:31:48,911 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 99 flow [2022-12-13 14:31:48,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:48,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:31:48,911 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 14:31:48,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:31:48,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:31:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:31:48,912 INFO L85 PathProgramCache]: Analyzing trace with hash 729328522, now seen corresponding path program 1 times [2022-12-13 14:31:48,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:31:48,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402241757] [2022-12-13 14:31:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:48,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:31:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:31:48,937 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:31:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:31:48,965 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:31:48,965 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:31:48,967 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 14:31:48,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 14:31:48,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 14:31:48,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 14:31:48,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 14:31:48,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:31:48,969 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 14:31:48,971 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:31:48,971 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 14:31:48,990 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:31:48,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 251 transitions, 520 flow [2022-12-13 14:31:49,038 INFO L130 PetriNetUnfolder]: 76/464 cut-off events. [2022-12-13 14:31:49,038 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:31:49,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 464 events. 76/464 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2060 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 292. Up to 9 conditions per place. [2022-12-13 14:31:49,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 251 transitions, 520 flow [2022-12-13 14:31:49,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 251 transitions, 520 flow [2022-12-13 14:31:49,043 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:31:49,043 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 251 transitions, 520 flow [2022-12-13 14:31:49,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 251 transitions, 520 flow [2022-12-13 14:31:49,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 251 transitions, 520 flow [2022-12-13 14:31:49,081 INFO L130 PetriNetUnfolder]: 76/464 cut-off events. [2022-12-13 14:31:49,081 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:31:49,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 464 events. 76/464 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2060 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 292. Up to 9 conditions per place. [2022-12-13 14:31:49,093 INFO L119 LiptonReduction]: Number of co-enabled transitions 27984 [2022-12-13 14:31:52,114 INFO L134 LiptonReduction]: Checked pairs total: 81942 [2022-12-13 14:31:52,114 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-12-13 14:31:52,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:31:52,116 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;@289485fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:31:52,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 14:31:52,118 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 14:31:52,118 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:31:52,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:31:52,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:31:52,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:31:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:31:52,119 INFO L85 PathProgramCache]: Analyzing trace with hash 38045195, now seen corresponding path program 1 times [2022-12-13 14:31:52,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:31:52,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443999583] [2022-12-13 14:31:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:52,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:31:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:31:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:52,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:31:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443999583] [2022-12-13 14:31:52,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443999583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:31:52,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:31:52,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:31:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645090741] [2022-12-13 14:31:52,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:31:52,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:31:52,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:31:52,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:31:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:31:52,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 430 [2022-12-13 14:31:52,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 112 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:52,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:31:52,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 430 [2022-12-13 14:31:52,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:31:53,917 INFO L130 PetriNetUnfolder]: 12979/22354 cut-off events. [2022-12-13 14:31:53,918 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2022-12-13 14:31:53,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42611 conditions, 22354 events. 12979/22354 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 167400 event pairs, 6060 based on Foata normal form. 4594/24931 useless extension candidates. Maximal degree in co-relation 2588. Up to 20120 conditions per place. [2022-12-13 14:31:54,000 INFO L137 encePairwiseOnDemand]: 395/430 looper letters, 69 selfloop transitions, 2 changer transitions 9/97 dead transitions. [2022-12-13 14:31:54,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 97 transitions, 370 flow [2022-12-13 14:31:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:31:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:31:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-12-13 14:31:54,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5612403100775194 [2022-12-13 14:31:54,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-12-13 14:31:54,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-12-13 14:31:54,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:31:54,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-12-13 14:31:54,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:54,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:54,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:54,010 INFO L175 Difference]: Start difference. First operand has 82 places, 112 transitions, 242 flow. Second operand 3 states and 724 transitions. [2022-12-13 14:31:54,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 97 transitions, 370 flow [2022-12-13 14:31:54,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 97 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:31:54,012 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 166 flow [2022-12-13 14:31:54,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2022-12-13 14:31:54,013 INFO L288 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2022-12-13 14:31:54,013 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 166 flow [2022-12-13 14:31:54,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:54,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:31:54,014 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:31:54,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:31:54,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:31:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:31:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1496988566, now seen corresponding path program 1 times [2022-12-13 14:31:54,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:31:54,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16572573] [2022-12-13 14:31:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:54,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:31:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:31:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:54,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:31:54,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16572573] [2022-12-13 14:31:54,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16572573] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:31:54,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956778247] [2022-12-13 14:31:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:54,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:31:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:31:54,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:31:54,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:31:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:31:54,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:31:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:31:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:54,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:31:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:54,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956778247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:31:54,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:31:54,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:31:54,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157321852] [2022-12-13 14:31:54,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:31:54,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:31:54,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:31:54,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:31:54,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:31:54,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 430 [2022-12-13 14:31:54,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 201.28571428571428) internal successors, (1409), 7 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:54,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:31:54,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 430 [2022-12-13 14:31:54,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:31:54,457 INFO L130 PetriNetUnfolder]: 1230/2422 cut-off events. [2022-12-13 14:31:54,457 INFO L131 PetriNetUnfolder]: For 584/584 co-relation queries the response was YES. [2022-12-13 14:31:54,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5327 conditions, 2422 events. 1230/2422 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14404 event pairs, 238 based on Foata normal form. 272/2686 useless extension candidates. Maximal degree in co-relation 4879. Up to 1472 conditions per place. [2022-12-13 14:31:54,463 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 80 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2022-12-13 14:31:54,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 384 flow [2022-12-13 14:31:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:31:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:31:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1080 transitions. [2022-12-13 14:31:54,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5023255813953489 [2022-12-13 14:31:54,465 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1080 transitions. [2022-12-13 14:31:54,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1080 transitions. [2022-12-13 14:31:54,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:31:54,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1080 transitions. [2022-12-13 14:31:54,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:54,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 430.0) internal successors, (2580), 6 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:54,470 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 430.0) internal successors, (2580), 6 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:54,470 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 166 flow. Second operand 5 states and 1080 transitions. [2022-12-13 14:31:54,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 384 flow [2022-12-13 14:31:54,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 380 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:31:54,473 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 126 flow [2022-12-13 14:31:54,473 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2022-12-13 14:31:54,474 INFO L288 CegarLoopForPetriNet]: 82 programPoint places, -20 predicate places. [2022-12-13 14:31:54,474 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 126 flow [2022-12-13 14:31:54,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.28571428571428) internal successors, (1409), 7 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:54,475 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:31:54,475 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 14:31:54,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:31:54,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:31:54,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:31:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:31:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1603795475, now seen corresponding path program 1 times [2022-12-13 14:31:54,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:31:54,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346844215] [2022-12-13 14:31:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:54,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:31:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:31:54,718 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:31:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:31:54,763 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:31:54,763 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:31:54,764 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 14:31:54,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 14:31:54,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 14:31:54,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 14:31:54,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 14:31:54,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:31:54,766 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 14:31:54,768 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:31:54,768 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 14:31:54,822 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 14:31:54,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 306 transitions, 642 flow [2022-12-13 14:31:54,887 INFO L130 PetriNetUnfolder]: 112/671 cut-off events. [2022-12-13 14:31:54,887 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 14:31:54,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 671 events. 112/671 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3111 event pairs, 1 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 472. Up to 16 conditions per place. [2022-12-13 14:31:54,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 306 transitions, 642 flow [2022-12-13 14:31:54,894 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 306 transitions, 642 flow [2022-12-13 14:31:54,894 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:31:54,894 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 306 transitions, 642 flow [2022-12-13 14:31:54,894 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 306 transitions, 642 flow [2022-12-13 14:31:54,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 306 transitions, 642 flow [2022-12-13 14:31:54,949 INFO L130 PetriNetUnfolder]: 112/671 cut-off events. [2022-12-13 14:31:54,949 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 14:31:54,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 671 events. 112/671 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3111 event pairs, 1 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 472. Up to 16 conditions per place. [2022-12-13 14:31:54,966 INFO L119 LiptonReduction]: Number of co-enabled transitions 50880 [2022-12-13 14:31:57,463 INFO L134 LiptonReduction]: Checked pairs total: 144751 [2022-12-13 14:31:57,464 INFO L136 LiptonReduction]: Total number of compositions: 204 [2022-12-13 14:31:57,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:31:57,466 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;@289485fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:31:57,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 14:31:57,467 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 14:31:57,467 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:31:57,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:31:57,467 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:31:57,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:31:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:31:57,467 INFO L85 PathProgramCache]: Analyzing trace with hash 55438406, now seen corresponding path program 1 times [2022-12-13 14:31:57,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:31:57,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148986313] [2022-12-13 14:31:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:31:57,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:31:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:31:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:31:57,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:31:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148986313] [2022-12-13 14:31:57,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148986313] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:31:57,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:31:57,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:31:57,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679409326] [2022-12-13 14:31:57,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:31:57,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:31:57,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:31:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:31:57,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:31:57,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 510 [2022-12-13 14:31:57,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 148 transitions, 326 flow. Second operand has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:31:57,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:31:57,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 510 [2022-12-13 14:31:57,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:28,081 INFO L130 PetriNetUnfolder]: 315465/468035 cut-off events. [2022-12-13 14:32:28,082 INFO L131 PetriNetUnfolder]: For 2930/2930 co-relation queries the response was YES. [2022-12-13 14:32:28,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900855 conditions, 468035 events. 315465/468035 cut-off events. For 2930/2930 co-relation queries the response was YES. Maximal size of possible extension queue 7266. Compared 4104650 event pairs, 203905 based on Foata normal form. 75134/510369 useless extension candidates. Maximal degree in co-relation 42494. Up to 430682 conditions per place. [2022-12-13 14:32:30,238 INFO L137 encePairwiseOnDemand]: 463/510 looper letters, 85 selfloop transitions, 2 changer transitions 10/121 dead transitions. [2022-12-13 14:32:30,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 121 transitions, 464 flow [2022-12-13 14:32:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:32:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:32:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 876 transitions. [2022-12-13 14:32:30,241 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5725490196078431 [2022-12-13 14:32:30,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 876 transitions. [2022-12-13 14:32:30,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 876 transitions. [2022-12-13 14:32:30,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:30,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 876 transitions. [2022-12-13 14:32:30,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-12-13 14:32:30,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:30,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 510.0) internal successors, (2040), 4 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:30,247 INFO L175 Difference]: Start difference. First operand has 107 places, 148 transitions, 326 flow. Second operand 3 states and 876 transitions. [2022-12-13 14:32:30,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 121 transitions, 464 flow [2022-12-13 14:32:30,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 121 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:32:30,255 INFO L231 Difference]: Finished difference. Result has 110 places, 95 transitions, 221 flow [2022-12-13 14:32:30,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=110, PETRI_TRANSITIONS=95} [2022-12-13 14:32:30,256 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 3 predicate places. [2022-12-13 14:32:30,256 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 95 transitions, 221 flow [2022-12-13 14:32:30,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:30,257 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:30,257 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:32:30,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:32:30,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:32:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:30,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1839224075, now seen corresponding path program 1 times [2022-12-13 14:32:30,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:32:30,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563525235] [2022-12-13 14:32:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:32:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:30,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:32:30,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563525235] [2022-12-13 14:32:30,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563525235] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:32:30,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105000320] [2022-12-13 14:32:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:30,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:32:30,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:32:30,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:32:30,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:32:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:30,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:32:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:32:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:30,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:32:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:30,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105000320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:32:30,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:32:30,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:32:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938462063] [2022-12-13 14:32:30,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:32:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:32:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:32:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:32:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:32:30,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 510 [2022-12-13 14:32:30,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 95 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 242.28571428571428) internal successors, (1696), 7 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:30,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:30,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 510 [2022-12-13 14:32:30,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:32:33,464 INFO L130 PetriNetUnfolder]: 31732/50654 cut-off events. [2022-12-13 14:32:33,464 INFO L131 PetriNetUnfolder]: For 17312/17312 co-relation queries the response was YES. [2022-12-13 14:32:33,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113006 conditions, 50654 events. 31732/50654 cut-off events. For 17312/17312 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 398387 event pairs, 0 based on Foata normal form. 4336/54990 useless extension candidates. Maximal degree in co-relation 7159. Up to 31106 conditions per place. [2022-12-13 14:32:33,678 INFO L137 encePairwiseOnDemand]: 507/510 looper letters, 141 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2022-12-13 14:32:33,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 168 transitions, 657 flow [2022-12-13 14:32:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:32:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:32:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1588 transitions. [2022-12-13 14:32:33,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5189542483660131 [2022-12-13 14:32:33,682 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1588 transitions. [2022-12-13 14:32:33,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1588 transitions. [2022-12-13 14:32:33,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:32:33,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1588 transitions. [2022-12-13 14:32:33,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 264.6666666666667) internal successors, (1588), 6 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:33,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 510.0) internal successors, (3570), 7 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:33,689 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 510.0) internal successors, (3570), 7 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:33,689 INFO L175 Difference]: Start difference. First operand has 110 places, 95 transitions, 221 flow. Second operand 6 states and 1588 transitions. [2022-12-13 14:32:33,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 168 transitions, 657 flow [2022-12-13 14:32:33,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 168 transitions, 649 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 14:32:33,718 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 183 flow [2022-12-13 14:32:33,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2022-12-13 14:32:33,719 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, -19 predicate places. [2022-12-13 14:32:33,719 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 183 flow [2022-12-13 14:32:33,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 242.28571428571428) internal successors, (1696), 7 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:33,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:33,720 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 14:32:33,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:32:33,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e6300e3-1b6d-4b29-aa3b-c5949681c95b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:32:33,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:32:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:33,923 INFO L85 PathProgramCache]: Analyzing trace with hash -142273132, now seen corresponding path program 1 times [2022-12-13 14:32:33,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:32:33,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610215775] [2022-12-13 14:32:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:33,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:32:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:32:33,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:32:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:32:33,974 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:32:33,975 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:32:33,975 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 14:32:33,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 14:32:33,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 14:32:33,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 14:32:33,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 14:32:33,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:32:33,975 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 14:32:33,976 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:32:33,976 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 14:32:33,999 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 14:32:34,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 361 transitions, 766 flow [2022-12-13 14:32:34,119 INFO L130 PetriNetUnfolder]: 160/946 cut-off events. [2022-12-13 14:32:34,119 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 14:32:34,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 946 events. 160/946 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4660 event pairs, 6 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 691. Up to 32 conditions per place. [2022-12-13 14:32:34,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 361 transitions, 766 flow [2022-12-13 14:32:34,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 361 transitions, 766 flow [2022-12-13 14:32:34,132 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:32:34,132 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 302 places, 361 transitions, 766 flow [2022-12-13 14:32:34,132 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 302 places, 361 transitions, 766 flow [2022-12-13 14:32:34,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 361 transitions, 766 flow [2022-12-13 14:32:34,228 INFO L130 PetriNetUnfolder]: 160/946 cut-off events. [2022-12-13 14:32:34,228 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 14:32:34,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 946 events. 160/946 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4660 event pairs, 6 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 691. Up to 32 conditions per place. [2022-12-13 14:32:34,266 INFO L119 LiptonReduction]: Number of co-enabled transitions 79712 [2022-12-13 14:32:36,892 INFO L134 LiptonReduction]: Checked pairs total: 234788 [2022-12-13 14:32:36,892 INFO L136 LiptonReduction]: Total number of compositions: 230 [2022-12-13 14:32:36,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:32:36,894 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;@289485fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:32:36,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 14:32:36,895 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 14:32:36,896 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:32:36,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:32:36,896 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:32:36,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:32:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:32:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 75324404, now seen corresponding path program 1 times [2022-12-13 14:32:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:32:36,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476885840] [2022-12-13 14:32:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:32:36,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:32:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:32:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:32:36,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:32:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476885840] [2022-12-13 14:32:36,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476885840] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:32:36,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:32:36,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:32:36,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041889643] [2022-12-13 14:32:36,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:32:36,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:32:36,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:32:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:32:36,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:32:36,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 591 [2022-12-13 14:32:36,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 184 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:32:36,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:32:36,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 591 [2022-12-13 14:32:36,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand