./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/03_incdec.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/03_incdec.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R --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 c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 --- 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-38b53e6 [2022-11-25 17:37:48,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:37:48,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:37:49,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:37:49,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:37:49,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:37:49,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:37:49,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:37:49,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:37:49,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:37:49,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:37:49,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:37:49,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:37:49,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:37:49,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:37:49,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:37:49,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:37:49,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:37:49,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:37:49,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:37:49,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:37:49,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:37:49,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:37:49,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:37:49,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:37:49,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:37:49,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:37:49,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:37:49,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:37:49,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:37:49,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:37:49,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:37:49,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:37:49,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:37:49,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:37:49,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:37:49,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:37:49,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:37:49,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:37:49,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:37:49,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:37:49,120 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:37:49,165 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:37:49,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:37:49,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:37:49,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:37:49,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:37:49,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:37:49,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:37:49,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:37:49,170 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:37:49,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:37:49,172 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:37:49,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:37:49,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:37:49,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:37:49,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:37:49,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:37:49,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:37:49,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:37:49,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:37:49,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:37:49,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:37:49,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:37:49,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:37:49,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:37:49,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:49,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:37:49,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:37:49,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:37:49,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:37:49,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:37:49,180 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:37:49,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:37:49,180 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:37:49,181 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:37:49,181 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_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 [2022-11-25 17:37:49,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:37:49,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:37:49,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:37:49,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:37:49,568 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:37:49,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/03_incdec.i [2022-11-25 17:37:52,940 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:37:53,329 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:37:53,330 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/sv-benchmarks/c/pthread-ext/03_incdec.i [2022-11-25 17:37:53,346 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/data/55c3b2198/02405f17ea0f46d9896cdd512dc236b3/FLAGd4aae9b34 [2022-11-25 17:37:53,371 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/data/55c3b2198/02405f17ea0f46d9896cdd512dc236b3 [2022-11-25 17:37:53,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:37:53,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:37:53,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:53,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:37:53,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:37:53,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:53,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@636f0bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53, skipping insertion in model container [2022-11-25 17:37:53,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:53,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:37:53,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:37:53,777 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_45c83863-91f3-4532-9dff-b8ee3d48285a/sv-benchmarks/c/pthread-ext/03_incdec.i[30534,30547] [2022-11-25 17:37:53,786 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_45c83863-91f3-4532-9dff-b8ee3d48285a/sv-benchmarks/c/pthread-ext/03_incdec.i[30928,30941] [2022-11-25 17:37:53,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:37:53,806 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:37:53,849 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_45c83863-91f3-4532-9dff-b8ee3d48285a/sv-benchmarks/c/pthread-ext/03_incdec.i[30534,30547] [2022-11-25 17:37:53,852 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_45c83863-91f3-4532-9dff-b8ee3d48285a/sv-benchmarks/c/pthread-ext/03_incdec.i[30928,30941] [2022-11-25 17:37:53,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:37:53,901 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:37:53,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53 WrapperNode [2022-11-25 17:37:53,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:53,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:37:53,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:37:53,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:37:53,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:53,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,008 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 133 [2022-11-25 17:37:54,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:37:54,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:37:54,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:37:54,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:37:54,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,072 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:37:54,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:37:54,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:37:54,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:37:54,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (1/1) ... [2022-11-25 17:37:54,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:54,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:54,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:37:54,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c83863-91f3-4532-9dff-b8ee3d48285a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:37:54,197 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 17:37:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 17:37:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:37:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:37:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:37:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:37:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:37:54,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:37:54,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:37:54,203 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:37:54,364 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:37:54,366 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:37:54,752 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:37:55,005 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:37:55,006 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:37:55,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:37:55 BoogieIcfgContainer [2022-11-25 17:37:55,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:37:55,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:37:55,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:37:55,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:37:55,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:37:53" (1/3) ... [2022-11-25 17:37:55,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3c0548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:37:55, skipping insertion in model container [2022-11-25 17:37:55,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:53" (2/3) ... [2022-11-25 17:37:55,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3c0548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:37:55, skipping insertion in model container [2022-11-25 17:37:55,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:37:55" (3/3) ... [2022-11-25 17:37:55,018 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2022-11-25 17:37:55,037 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:37:55,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:37:55,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 17:37:55,053 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:37:55,182 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:37:55,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 181 flow [2022-11-25 17:37:55,307 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-25 17:37:55,307 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:55,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 192 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2022-11-25 17:37:55,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 88 transitions, 181 flow [2022-11-25 17:37:55,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 88 transitions, 181 flow [2022-11-25 17:37:55,324 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:37:55,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 88 transitions, 181 flow [2022-11-25 17:37:55,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 88 transitions, 181 flow [2022-11-25 17:37:55,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 181 flow [2022-11-25 17:37:55,373 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-25 17:37:55,373 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:55,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 192 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2022-11-25 17:37:55,377 INFO L119 LiptonReduction]: Number of co-enabled transitions 1568 [2022-11-25 17:38:02,238 INFO L134 LiptonReduction]: Checked pairs total: 1494 [2022-11-25 17:38:02,238 INFO L136 LiptonReduction]: Total number of compositions: 111 [2022-11-25 17:38:02,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:38:02,264 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;@351ea5a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:38:02,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 17:38:02,268 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-11-25 17:38:02,268 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:38:02,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:02,269 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:38:02,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:38:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash 19770865, now seen corresponding path program 1 times [2022-11-25 17:38:02,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:02,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892958463] [2022-11-25 17:38:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:02,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:02,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892958463] [2022-11-25 17:38:02,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892958463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:02,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:02,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:38:02,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221578609] [2022-11-25 17:38:02,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:02,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:38:02,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:38:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:38:02,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 199 [2022-11-25 17:38:02,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 9 transitions, 23 flow. Second operand has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:02,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:02,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 199 [2022-11-25 17:38:02,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:02,540 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 17:38:02,541 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:38:02,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2022-11-25 17:38:02,542 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2022-11-25 17:38:02,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2022-11-25 17:38:02,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:38:02,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:38:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 150 transitions. [2022-11-25 17:38:02,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3768844221105528 [2022-11-25 17:38:02,559 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 150 transitions. [2022-11-25 17:38:02,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 150 transitions. [2022-11-25 17:38:02,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:02,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 150 transitions. [2022-11-25 17:38:02,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:02,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:02,573 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:02,576 INFO L175 Difference]: Start difference. First operand has 12 places, 9 transitions, 23 flow. Second operand 2 states and 150 transitions. [2022-11-25 17:38:02,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2022-11-25 17:38:02,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:38:02,581 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2022-11-25 17:38:02,584 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2022-11-25 17:38:02,588 INFO L288 CegarLoopForPetriNet]: 12 programPoint places, -2 predicate places. [2022-11-25 17:38:02,588 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2022-11-25 17:38:02,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:02,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:02,589 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:38:02,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:38:02,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:38:02,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1819871183, now seen corresponding path program 1 times [2022-11-25 17:38:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:02,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941359269] [2022-11-25 17:38:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:02,619 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:38:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:02,652 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:38:02,652 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:38:02,655 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 17:38:02,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 17:38:02,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 17:38:02,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 17:38:02,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 17:38:02,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:38:02,659 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 17:38:02,662 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:38:02,662 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:38:02,697 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:38:02,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 302 flow [2022-11-25 17:38:02,743 INFO L130 PetriNetUnfolder]: 13/169 cut-off events. [2022-11-25 17:38:02,743 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:38:02,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 169 events. 13/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 524 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 125. Up to 6 conditions per place. [2022-11-25 17:38:02,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 145 transitions, 302 flow [2022-11-25 17:38:02,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 145 transitions, 302 flow [2022-11-25 17:38:02,750 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:38:02,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 145 transitions, 302 flow [2022-11-25 17:38:02,751 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 145 transitions, 302 flow [2022-11-25 17:38:02,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 302 flow [2022-11-25 17:38:02,787 INFO L130 PetriNetUnfolder]: 13/169 cut-off events. [2022-11-25 17:38:02,788 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:38:02,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 169 events. 13/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 524 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 125. Up to 6 conditions per place. [2022-11-25 17:38:02,797 INFO L119 LiptonReduction]: Number of co-enabled transitions 9520 [2022-11-25 17:38:07,717 INFO L134 LiptonReduction]: Checked pairs total: 49650 [2022-11-25 17:38:07,718 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-11-25 17:38:07,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:38:07,725 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;@351ea5a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:38:07,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:38:07,733 INFO L130 PetriNetUnfolder]: 4/43 cut-off events. [2022-11-25 17:38:07,733 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:38:07,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:07,733 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:38:07,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:38:07,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:07,747 INFO L85 PathProgramCache]: Analyzing trace with hash -752978277, now seen corresponding path program 1 times [2022-11-25 17:38:07,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:07,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147798013] [2022-11-25 17:38:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:07,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:07,783 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:38:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:07,802 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:38:07,803 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:38:07,803 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 17:38:07,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-25 17:38:07,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-25 17:38:07,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-25 17:38:07,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-25 17:38:07,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-25 17:38:07,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-25 17:38:07,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:38:07,805 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-11-25 17:38:07,806 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:38:07,806 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:38:07,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:38:07,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 202 transitions, 425 flow [2022-11-25 17:38:07,945 INFO L130 PetriNetUnfolder]: 19/239 cut-off events. [2022-11-25 17:38:07,945 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:38:07,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 239 events. 19/239 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 867 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2022-11-25 17:38:07,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 202 transitions, 425 flow [2022-11-25 17:38:07,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 202 transitions, 425 flow [2022-11-25 17:38:07,953 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:38:07,954 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 202 transitions, 425 flow [2022-11-25 17:38:07,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 202 transitions, 425 flow [2022-11-25 17:38:07,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 202 transitions, 425 flow [2022-11-25 17:38:07,998 INFO L130 PetriNetUnfolder]: 19/239 cut-off events. [2022-11-25 17:38:07,999 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:38:08,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 239 events. 19/239 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 867 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2022-11-25 17:38:08,021 INFO L119 LiptonReduction]: Number of co-enabled transitions 23856 [2022-11-25 17:38:14,963 INFO L134 LiptonReduction]: Checked pairs total: 119953 [2022-11-25 17:38:14,963 INFO L136 LiptonReduction]: Total number of compositions: 202 [2022-11-25 17:38:14,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:38:14,973 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;@351ea5a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:38:14,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-25 17:38:14,980 INFO L130 PetriNetUnfolder]: 5/48 cut-off events. [2022-11-25 17:38:14,980 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:38:14,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:14,981 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:14,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-25 17:38:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1287231589, now seen corresponding path program 1 times [2022-11-25 17:38:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:14,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313042165] [2022-11-25 17:38:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:14,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:15,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313042165] [2022-11-25 17:38:15,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313042165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:15,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:15,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934312034] [2022-11-25 17:38:15,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:15,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:15,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:15,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:15,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:15,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 404 [2022-11-25 17:38:15,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:15,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:15,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 404 [2022-11-25 17:38:15,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:18,379 INFO L130 PetriNetUnfolder]: 12431/18736 cut-off events. [2022-11-25 17:38:18,379 INFO L131 PetriNetUnfolder]: For 877/877 co-relation queries the response was YES. [2022-11-25 17:38:18,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36473 conditions, 18736 events. 12431/18736 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 1089. Compared 132627 event pairs, 5511 based on Foata normal form. 228/17605 useless extension candidates. Maximal degree in co-relation 8971. Up to 16663 conditions per place. [2022-11-25 17:38:18,602 INFO L137 encePairwiseOnDemand]: 390/404 looper letters, 65 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2022-11-25 17:38:18,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 361 flow [2022-11-25 17:38:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2022-11-25 17:38:18,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41996699669966997 [2022-11-25 17:38:18,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2022-11-25 17:38:18,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2022-11-25 17:38:18,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:18,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2022-11-25 17:38:18,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:18,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:18,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:18,629 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 189 flow. Second operand 3 states and 509 transitions. [2022-11-25 17:38:18,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 361 flow [2022-11-25 17:38:18,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 95 transitions, 353 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 17:38:18,635 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 211 flow [2022-11-25 17:38:18,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2022-11-25 17:38:18,636 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2022-11-25 17:38:18,636 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 211 flow [2022-11-25 17:38:18,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:18,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:18,637 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:18,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:38:18,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-25 17:38:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash -569248897, now seen corresponding path program 1 times [2022-11-25 17:38:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:18,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107313684] [2022-11-25 17:38:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:18,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107313684] [2022-11-25 17:38:18,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107313684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:18,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:18,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:38:18,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648539278] [2022-11-25 17:38:18,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:18,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:38:18,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:38:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:38:19,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 404 [2022-11-25 17:38:19,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:19,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:19,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 404 [2022-11-25 17:38:19,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:23,143 INFO L130 PetriNetUnfolder]: 21127/32341 cut-off events. [2022-11-25 17:38:23,144 INFO L131 PetriNetUnfolder]: For 3499/3499 co-relation queries the response was YES. [2022-11-25 17:38:23,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66293 conditions, 32341 events. 21127/32341 cut-off events. For 3499/3499 co-relation queries the response was YES. Maximal size of possible extension queue 1903. Compared 251300 event pairs, 6567 based on Foata normal form. 540/31047 useless extension candidates. Maximal degree in co-relation 48166. Up to 13463 conditions per place. [2022-11-25 17:38:23,495 INFO L137 encePairwiseOnDemand]: 393/404 looper letters, 156 selfloop transitions, 14 changer transitions 0/192 dead transitions. [2022-11-25 17:38:23,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 192 transitions, 831 flow [2022-11-25 17:38:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:38:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:38:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 983 transitions. [2022-11-25 17:38:23,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40552805280528054 [2022-11-25 17:38:23,504 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 983 transitions. [2022-11-25 17:38:23,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 983 transitions. [2022-11-25 17:38:23,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:23,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 983 transitions. [2022-11-25 17:38:23,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.83333333333334) internal successors, (983), 6 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:23,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:23,521 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 404.0) internal successors, (2828), 7 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:23,521 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 211 flow. Second operand 6 states and 983 transitions. [2022-11-25 17:38:23,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 192 transitions, 831 flow [2022-11-25 17:38:23,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 192 transitions, 825 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:23,532 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 296 flow [2022-11-25 17:38:23,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=404, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2022-11-25 17:38:23,536 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2022-11-25 17:38:23,536 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 296 flow [2022-11-25 17:38:23,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:23,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:23,538 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:38:23,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:38:23,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-25 17:38:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1240041934, now seen corresponding path program 1 times [2022-11-25 17:38:23,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:23,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981185422] [2022-11-25 17:38:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:23,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:23,572 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:38:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:23,617 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:38:23,617 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:38:23,617 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-25 17:38:23,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-11-25 17:38:23,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-11-25 17:38:23,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-11-25 17:38:23,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-11-25 17:38:23,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-11-25 17:38:23,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-11-25 17:38:23,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-11-25 17:38:23,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-11-25 17:38:23,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:38:23,620 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:38:23,621 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:38:23,621 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 17:38:23,671 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:38:23,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 259 transitions, 550 flow [2022-11-25 17:38:23,730 INFO L130 PetriNetUnfolder]: 25/309 cut-off events. [2022-11-25 17:38:23,730 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:38:23,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 309 events. 25/309 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1232 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 247. Up to 10 conditions per place. [2022-11-25 17:38:23,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 259 transitions, 550 flow [2022-11-25 17:38:23,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 259 transitions, 550 flow [2022-11-25 17:38:23,737 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:38:23,737 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 259 transitions, 550 flow [2022-11-25 17:38:23,738 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 259 transitions, 550 flow [2022-11-25 17:38:23,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 259 transitions, 550 flow [2022-11-25 17:38:23,788 INFO L130 PetriNetUnfolder]: 25/309 cut-off events. [2022-11-25 17:38:23,788 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:38:23,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 309 events. 25/309 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1232 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 247. Up to 10 conditions per place. [2022-11-25 17:38:23,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 44576 [2022-11-25 17:38:33,126 INFO L134 LiptonReduction]: Checked pairs total: 261581 [2022-11-25 17:38:33,127 INFO L136 LiptonReduction]: Total number of compositions: 267 [2022-11-25 17:38:33,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:38:33,136 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;@351ea5a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:38:33,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-25 17:38:33,144 INFO L130 PetriNetUnfolder]: 5/48 cut-off events. [2022-11-25 17:38:33,144 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:38:33,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:33,145 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:33,145 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-11-25 17:38:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:33,146 INFO L85 PathProgramCache]: Analyzing trace with hash 550763876, now seen corresponding path program 1 times [2022-11-25 17:38:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:38:33,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79449169] [2022-11-25 17:38:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:33,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:38:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:33,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:38:33,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79449169] [2022-11-25 17:38:33,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79449169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:33,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:33,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:38:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199839539] [2022-11-25 17:38:33,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:38:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:38:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:38:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:38:33,724 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 526 [2022-11-25 17:38:33,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 110 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:33,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:33,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 526 [2022-11-25 17:38:33,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand