./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:49:04,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:49:04,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:49:04,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:49:04,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:49:04,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:49:04,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:49:04,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:49:04,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:49:04,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:49:04,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:49:04,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:49:04,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:49:04,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:49:04,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:49:04,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:49:04,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:49:04,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:49:04,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:49:04,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:49:04,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:49:04,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:49:04,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:49:04,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:49:04,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:49:04,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:49:04,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:49:04,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:49:04,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:49:04,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:49:04,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:49:04,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:49:04,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:49:04,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:49:04,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:49:04,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:49:04,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:49:04,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:49:04,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:49:04,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:49:04,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:49:04,343 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:49:04,372 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:49:04,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:49:04,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:49:04,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:49:04,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:49:04,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:49:04,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:49:04,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:49:04,377 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:49:04,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:49:04,378 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:49:04,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:49:04,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:49:04,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:49:04,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:49:04,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:49:04,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:49:04,380 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:49:04,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:49:04,381 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:49:04,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:49:04,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:49:04,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:49:04,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:49:04,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:04,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:49:04,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:49:04,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:49:04,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:49:04,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:49:04,385 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:49:04,385 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:49:04,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:49:04,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 [2022-11-02 20:49:04,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:49:04,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:49:04,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:49:04,755 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:49:04,756 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:49:04,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-11-02 20:49:04,870 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/data/c5163c8ab/96854a2f6dd34a1cae0dda9a9ccbb32c/FLAGd8552af2f [2022-11-02 20:49:05,659 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:49:05,660 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-11-02 20:49:05,684 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/data/c5163c8ab/96854a2f6dd34a1cae0dda9a9ccbb32c/FLAGd8552af2f [2022-11-02 20:49:05,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/data/c5163c8ab/96854a2f6dd34a1cae0dda9a9ccbb32c [2022-11-02 20:49:05,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:49:05,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:49:05,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:05,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:49:05,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:49:05,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:05" (1/1) ... [2022-11-02 20:49:05,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1703c962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:05, skipping insertion in model container [2022-11-02 20:49:05,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:05" (1/1) ... [2022-11-02 20:49:05,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:49:05,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:49:06,687 WARN L230 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_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-11-02 20:49:06,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:06,742 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:49:06,822 WARN L230 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_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-11-02 20:49:06,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:06,908 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:49:06,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06 WrapperNode [2022-11-02 20:49:06,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:06,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:06,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:49:06,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:49:06,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:06,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,009 INFO L138 Inliner]: procedures = 273, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2022-11-02 20:49:07,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:07,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:49:07,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:49:07,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:49:07,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,070 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:49:07,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:49:07,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:49:07,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:49:07,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (1/1) ... [2022-11-02 20:49:07,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:07,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:07,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:49:07,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:49:07,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:49:07,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:49:07,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:49:07,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:49:07,183 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:49:07,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:49:07,183 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-02 20:49:07,185 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-02 20:49:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:49:07,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:49:07,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:49:07,188 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:49:07,381 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:49:07,383 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:49:07,807 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:49:07,815 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:49:07,815 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-02 20:49:07,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:07 BoogieIcfgContainer [2022-11-02 20:49:07,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:49:07,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:49:07,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:49:07,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:49:07,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:49:05" (1/3) ... [2022-11-02 20:49:07,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7f1bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:07, skipping insertion in model container [2022-11-02 20:49:07,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:06" (2/3) ... [2022-11-02 20:49:07,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7f1bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:07, skipping insertion in model container [2022-11-02 20:49:07,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:07" (3/3) ... [2022-11-02 20:49:07,828 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2022-11-02 20:49:07,836 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:49:07,847 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:49:07,847 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:49:07,847 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:49:07,928 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-02 20:49:08,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 128 transitions, 264 flow [2022-11-02 20:49:08,134 INFO L130 PetriNetUnfolder]: 17/168 cut-off events. [2022-11-02 20:49:08,135 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-02 20:49:08,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 168 events. 17/168 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 403 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 84. Up to 4 conditions per place. [2022-11-02 20:49:08,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 128 transitions, 264 flow [2022-11-02 20:49:08,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 123 transitions, 251 flow [2022-11-02 20:49:08,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:08,171 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;@4514f391, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:08,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:08,202 INFO L130 PetriNetUnfolder]: 3/91 cut-off events. [2022-11-02 20:49:08,203 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:08,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:08,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:08,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash 349975661, now seen corresponding path program 1 times [2022-11-02 20:49:08,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:08,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127980313] [2022-11-02 20:49:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:08,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:08,410 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:08,497 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:08,500 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:08,502 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:08,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:08,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:49:08,506 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 20:49:08,511 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:08,511 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:49:08,560 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:49:08,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 169 transitions, 356 flow [2022-11-02 20:49:08,685 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2022-11-02 20:49:08,685 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-02 20:49:08,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 274 events. 31/274 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 844 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2022-11-02 20:49:08,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 169 transitions, 356 flow [2022-11-02 20:49:08,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 169 transitions, 356 flow [2022-11-02 20:49:08,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:08,699 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;@4514f391, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:08,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:08,723 INFO L130 PetriNetUnfolder]: 4/96 cut-off events. [2022-11-02 20:49:08,724 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:49:08,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:08,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:08,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:08,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1017315846, now seen corresponding path program 1 times [2022-11-02 20:49:08,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:08,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998234681] [2022-11-02 20:49:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:08,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998234681] [2022-11-02 20:49:08,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998234681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:08,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:08,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:08,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060004528] [2022-11-02 20:49:08,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:08,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:08,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:08,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:08,979 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 169 [2022-11-02 20:49:08,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 169 transitions, 356 flow. Second operand has 2 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:08,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:08,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 169 [2022-11-02 20:49:08,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:09,115 INFO L130 PetriNetUnfolder]: 3/243 cut-off events. [2022-11-02 20:49:09,115 INFO L131 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-11-02 20:49:09,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 243 events. 3/243 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 623 event pairs, 0 based on Foata normal form. 40/273 useless extension candidates. Maximal degree in co-relation 154. Up to 7 conditions per place. [2022-11-02 20:49:09,119 INFO L137 encePairwiseOnDemand]: 152/169 looper letters, 2 selfloop transitions, 0 changer transitions 21/151 dead transitions. [2022-11-02 20:49:09,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 151 transitions, 328 flow [2022-11-02 20:49:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 315 transitions. [2022-11-02 20:49:09,137 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9319526627218935 [2022-11-02 20:49:09,138 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 315 transitions. [2022-11-02 20:49:09,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 315 transitions. [2022-11-02 20:49:09,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:09,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 315 transitions. [2022-11-02 20:49:09,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 157.5) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:09,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:09,164 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:09,166 INFO L175 Difference]: Start difference. First operand has 155 places, 169 transitions, 356 flow. Second operand 2 states and 315 transitions. [2022-11-02 20:49:09,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 151 transitions, 328 flow [2022-11-02 20:49:09,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 151 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:09,176 INFO L231 Difference]: Finished difference. Result has 155 places, 130 transitions, 272 flow [2022-11-02 20:49:09,179 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=272, PETRI_PLACES=155, PETRI_TRANSITIONS=130} [2022-11-02 20:49:09,183 INFO L287 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-11-02 20:49:09,184 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 130 transitions, 272 flow [2022-11-02 20:49:09,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:09,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:09,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:09,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:49:09,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1770099641, now seen corresponding path program 1 times [2022-11-02 20:49:09,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:09,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465965824] [2022-11-02 20:49:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:09,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:09,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465965824] [2022-11-02 20:49:09,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465965824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:09,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:09,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:09,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988100221] [2022-11-02 20:49:09,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:09,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:09,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:09,362 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 169 [2022-11-02 20:49:09,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 130 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:09,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:09,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 169 [2022-11-02 20:49:09,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:09,465 INFO L130 PetriNetUnfolder]: 0/158 cut-off events. [2022-11-02 20:49:09,466 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:49:09,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 158 events. 0/158 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 257 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-02 20:49:09,467 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 11 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2022-11-02 20:49:09,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 134 transitions, 306 flow [2022-11-02 20:49:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2022-11-02 20:49:09,477 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8560157790927022 [2022-11-02 20:49:09,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2022-11-02 20:49:09,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2022-11-02 20:49:09,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:09,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2022-11-02 20:49:09,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:09,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:09,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:09,489 INFO L175 Difference]: Start difference. First operand has 155 places, 130 transitions, 272 flow. Second operand 3 states and 434 transitions. [2022-11-02 20:49:09,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 134 transitions, 306 flow [2022-11-02 20:49:09,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 134 transitions, 304 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:09,500 INFO L231 Difference]: Finished difference. Result has 139 places, 131 transitions, 282 flow [2022-11-02 20:49:09,501 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=139, PETRI_TRANSITIONS=131} [2022-11-02 20:49:09,504 INFO L287 CegarLoopForPetriNet]: 155 programPoint places, -16 predicate places. [2022-11-02 20:49:09,504 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 131 transitions, 282 flow [2022-11-02 20:49:09,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:09,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:09,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:09,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:49:09,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:09,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:09,508 INFO L85 PathProgramCache]: Analyzing trace with hash -720853353, now seen corresponding path program 1 times [2022-11-02 20:49:09,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:09,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539719334] [2022-11-02 20:49:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:09,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:09,597 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:09,658 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:09,662 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:09,662 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:09,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:09,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:49:09,665 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:49:09,666 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:09,668 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:49:09,739 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:49:09,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 210 transitions, 450 flow [2022-11-02 20:49:09,853 INFO L130 PetriNetUnfolder]: 50/413 cut-off events. [2022-11-02 20:49:09,853 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-02 20:49:09,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 413 events. 50/413 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1502 event pairs, 1 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2022-11-02 20:49:09,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 210 transitions, 450 flow [2022-11-02 20:49:09,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 210 transitions, 450 flow [2022-11-02 20:49:09,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:09,879 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;@4514f391, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:09,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:09,893 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-02 20:49:09,894 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:49:09,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:09,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:09,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1931036359, now seen corresponding path program 1 times [2022-11-02 20:49:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:09,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604478057] [2022-11-02 20:49:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:09,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:10,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:10,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604478057] [2022-11-02 20:49:10,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604478057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:10,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:10,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662295802] [2022-11-02 20:49:10,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:10,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:10,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:10,067 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 210 [2022-11-02 20:49:10,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 210 transitions, 450 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:10,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:10,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 210 [2022-11-02 20:49:10,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:10,232 INFO L130 PetriNetUnfolder]: 7/346 cut-off events. [2022-11-02 20:49:10,232 INFO L131 PetriNetUnfolder]: For 43/82 co-relation queries the response was YES. [2022-11-02 20:49:10,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 346 events. 7/346 cut-off events. For 43/82 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1082 event pairs, 1 based on Foata normal form. 139/471 useless extension candidates. Maximal degree in co-relation 250. Up to 30 conditions per place. [2022-11-02 20:49:10,238 INFO L137 encePairwiseOnDemand]: 184/210 looper letters, 12 selfloop transitions, 2 changer transitions 22/190 dead transitions. [2022-11-02 20:49:10,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 190 transitions, 444 flow [2022-11-02 20:49:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-11-02 20:49:10,247 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-02 20:49:10,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-11-02 20:49:10,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-11-02 20:49:10,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:10,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-11-02 20:49:10,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:10,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:10,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:10,262 INFO L175 Difference]: Start difference. First operand has 191 places, 210 transitions, 450 flow. Second operand 3 states and 567 transitions. [2022-11-02 20:49:10,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 190 transitions, 444 flow [2022-11-02 20:49:10,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 190 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:10,273 INFO L231 Difference]: Finished difference. Result has 193 places, 165 transitions, 361 flow [2022-11-02 20:49:10,274 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=193, PETRI_TRANSITIONS=165} [2022-11-02 20:49:10,277 INFO L287 CegarLoopForPetriNet]: 191 programPoint places, 2 predicate places. [2022-11-02 20:49:10,277 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 165 transitions, 361 flow [2022-11-02 20:49:10,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:10,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:10,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:10,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:49:10,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1053079369, now seen corresponding path program 1 times [2022-11-02 20:49:10,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:10,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528397597] [2022-11-02 20:49:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:10,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:10,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:10,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528397597] [2022-11-02 20:49:10,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528397597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:10,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49160750] [2022-11-02 20:49:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:10,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:10,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:49:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:10,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:10,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:10,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:10,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49160750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:10,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:10,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:10,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198289763] [2022-11-02 20:49:10,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:10,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:10,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:10,874 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 210 [2022-11-02 20:49:10,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 165 transitions, 361 flow. Second operand has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:10,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:10,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 210 [2022-11-02 20:49:10,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:11,068 INFO L130 PetriNetUnfolder]: 0/186 cut-off events. [2022-11-02 20:49:11,069 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 20:49:11,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 186 events. 0/186 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 316 event pairs, 0 based on Foata normal form. 2/188 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-02 20:49:11,070 INFO L137 encePairwiseOnDemand]: 204/210 looper letters, 13 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-11-02 20:49:11,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 175 transitions, 427 flow [2022-11-02 20:49:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1572 transitions. [2022-11-02 20:49:11,076 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-11-02 20:49:11,076 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1572 transitions. [2022-11-02 20:49:11,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1572 transitions. [2022-11-02 20:49:11,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:11,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1572 transitions. [2022-11-02 20:49:11,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:11,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:11,091 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:11,094 INFO L175 Difference]: Start difference. First operand has 193 places, 165 transitions, 361 flow. Second operand 9 states and 1572 transitions. [2022-11-02 20:49:11,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 175 transitions, 427 flow [2022-11-02 20:49:11,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 175 transitions, 419 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:11,102 INFO L231 Difference]: Finished difference. Result has 184 places, 171 transitions, 403 flow [2022-11-02 20:49:11,103 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=403, PETRI_PLACES=184, PETRI_TRANSITIONS=171} [2022-11-02 20:49:11,106 INFO L287 CegarLoopForPetriNet]: 191 programPoint places, -7 predicate places. [2022-11-02 20:49:11,106 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 171 transitions, 403 flow [2022-11-02 20:49:11,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:11,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:11,110 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:11,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:11,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:49:11,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:11,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash -707148592, now seen corresponding path program 1 times [2022-11-02 20:49:11,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:11,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574564549] [2022-11-02 20:49:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:11,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:11,390 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:11,421 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:11,421 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:11,421 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:11,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:11,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:49:11,422 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:49:11,423 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:11,423 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:49:11,494 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-02 20:49:11,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 251 transitions, 546 flow [2022-11-02 20:49:11,661 INFO L130 PetriNetUnfolder]: 81/620 cut-off events. [2022-11-02 20:49:11,661 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-11-02 20:49:11,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 620 events. 81/620 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2551 event pairs, 6 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 433. Up to 32 conditions per place. [2022-11-02 20:49:11,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 251 transitions, 546 flow [2022-11-02 20:49:11,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 251 transitions, 546 flow [2022-11-02 20:49:11,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:11,683 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;@4514f391, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:11,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:11,695 INFO L130 PetriNetUnfolder]: 3/95 cut-off events. [2022-11-02 20:49:11,695 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:49:11,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:11,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:11,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1008025977, now seen corresponding path program 1 times [2022-11-02 20:49:11,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847136005] [2022-11-02 20:49:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:11,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:11,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:11,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847136005] [2022-11-02 20:49:11,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847136005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:11,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:11,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101195911] [2022-11-02 20:49:11,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:11,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:11,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:11,760 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 251 [2022-11-02 20:49:11,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 251 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:11,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:11,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 251 [2022-11-02 20:49:11,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:11,979 INFO L130 PetriNetUnfolder]: 20/534 cut-off events. [2022-11-02 20:49:11,980 INFO L131 PetriNetUnfolder]: For 131/249 co-relation queries the response was YES. [2022-11-02 20:49:11,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 534 events. 20/534 cut-off events. For 131/249 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2175 event pairs, 6 based on Foata normal form. 340/850 useless extension candidates. Maximal degree in co-relation 400. Up to 56 conditions per place. [2022-11-02 20:49:11,990 INFO L137 encePairwiseOnDemand]: 219/251 looper letters, 13 selfloop transitions, 2 changer transitions 23/225 dead transitions. [2022-11-02 20:49:11,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 225 transitions, 532 flow [2022-11-02 20:49:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2022-11-02 20:49:11,993 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8950863213811421 [2022-11-02 20:49:11,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2022-11-02 20:49:11,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2022-11-02 20:49:11,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:11,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2022-11-02 20:49:11,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:12,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:12,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:12,002 INFO L175 Difference]: Start difference. First operand has 227 places, 251 transitions, 546 flow. Second operand 3 states and 674 transitions. [2022-11-02 20:49:12,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 225 transitions, 532 flow [2022-11-02 20:49:12,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 225 transitions, 532 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:12,052 INFO L231 Difference]: Finished difference. Result has 229 places, 199 transitions, 440 flow [2022-11-02 20:49:12,054 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=440, PETRI_PLACES=229, PETRI_TRANSITIONS=199} [2022-11-02 20:49:12,055 INFO L287 CegarLoopForPetriNet]: 227 programPoint places, 2 predicate places. [2022-11-02 20:49:12,055 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 199 transitions, 440 flow [2022-11-02 20:49:12,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:12,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:12,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:12,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:49:12,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:12,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1183444336, now seen corresponding path program 1 times [2022-11-02 20:49:12,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:12,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795361638] [2022-11-02 20:49:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:12,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:12,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795361638] [2022-11-02 20:49:12,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795361638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935223763] [2022-11-02 20:49:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:12,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:12,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:12,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:12,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:49:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:12,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:12,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935223763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:12,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:12,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982246126] [2022-11-02 20:49:12,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:12,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:12,465 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 251 [2022-11-02 20:49:12,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 199 transitions, 440 flow. Second operand has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:12,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:12,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 251 [2022-11-02 20:49:12,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:12,668 INFO L130 PetriNetUnfolder]: 0/244 cut-off events. [2022-11-02 20:49:12,668 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-02 20:49:12,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 244 events. 0/244 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 572 event pairs, 0 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-02 20:49:12,670 INFO L137 encePairwiseOnDemand]: 245/251 looper letters, 14 selfloop transitions, 9 changer transitions 0/209 dead transitions. [2022-11-02 20:49:12,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 209 transitions, 508 flow [2022-11-02 20:49:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1870 transitions. [2022-11-02 20:49:12,677 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8277999114652501 [2022-11-02 20:49:12,677 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1870 transitions. [2022-11-02 20:49:12,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1870 transitions. [2022-11-02 20:49:12,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:12,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1870 transitions. [2022-11-02 20:49:12,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.77777777777777) internal successors, (1870), 9 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:12,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:12,691 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:12,691 INFO L175 Difference]: Start difference. First operand has 229 places, 199 transitions, 440 flow. Second operand 9 states and 1870 transitions. [2022-11-02 20:49:12,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 209 transitions, 508 flow [2022-11-02 20:49:12,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 209 transitions, 494 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:12,699 INFO L231 Difference]: Finished difference. Result has 220 places, 205 transitions, 476 flow [2022-11-02 20:49:12,700 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=476, PETRI_PLACES=220, PETRI_TRANSITIONS=205} [2022-11-02 20:49:12,702 INFO L287 CegarLoopForPetriNet]: 227 programPoint places, -7 predicate places. [2022-11-02 20:49:12,703 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 205 transitions, 476 flow [2022-11-02 20:49:12,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:12,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:12,705 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:12,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:12,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:12,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:12,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:12,931 INFO L85 PathProgramCache]: Analyzing trace with hash 134031480, now seen corresponding path program 1 times [2022-11-02 20:49:12,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:12,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379418472] [2022-11-02 20:49:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:12,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:12,975 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:13,025 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:13,029 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:13,030 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:13,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:13,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:49:13,032 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:49:13,033 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:13,033 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-02 20:49:13,105 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-02 20:49:13,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 292 transitions, 644 flow [2022-11-02 20:49:13,448 INFO L130 PetriNetUnfolder]: 140/967 cut-off events. [2022-11-02 20:49:13,448 INFO L131 PetriNetUnfolder]: For 110/115 co-relation queries the response was YES. [2022-11-02 20:49:13,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 967 events. 140/967 cut-off events. For 110/115 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4604 event pairs, 23 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 665. Up to 80 conditions per place. [2022-11-02 20:49:13,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 292 transitions, 644 flow [2022-11-02 20:49:13,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 292 transitions, 644 flow [2022-11-02 20:49:13,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:13,493 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;@4514f391, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:13,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:13,503 INFO L130 PetriNetUnfolder]: 4/93 cut-off events. [2022-11-02 20:49:13,503 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:49:13,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:13,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:13,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash 790063430, now seen corresponding path program 1 times [2022-11-02 20:49:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:13,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292319177] [2022-11-02 20:49:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:13,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:13,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:13,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292319177] [2022-11-02 20:49:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292319177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:13,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:13,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:13,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189474460] [2022-11-02 20:49:13,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:13,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:13,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:13,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:13,568 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 292 [2022-11-02 20:49:13,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 292 transitions, 644 flow. Second operand has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:13,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:13,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 292 [2022-11-02 20:49:13,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:13,916 INFO L130 PetriNetUnfolder]: 54/875 cut-off events. [2022-11-02 20:49:13,916 INFO L131 PetriNetUnfolder]: For 287/308 co-relation queries the response was YES. [2022-11-02 20:49:13,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 875 events. 54/875 cut-off events. For 287/308 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4206 event pairs, 23 based on Foata normal form. 563/1394 useless extension candidates. Maximal degree in co-relation 636. Up to 86 conditions per place. [2022-11-02 20:49:13,929 INFO L137 encePairwiseOnDemand]: 257/292 looper letters, 5 selfloop transitions, 0 changer transitions 24/256 dead transitions. [2022-11-02 20:49:13,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 256 transitions, 592 flow [2022-11-02 20:49:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 537 transitions. [2022-11-02 20:49:13,932 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9195205479452054 [2022-11-02 20:49:13,932 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 537 transitions. [2022-11-02 20:49:13,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 537 transitions. [2022-11-02 20:49:13,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:13,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 537 transitions. [2022-11-02 20:49:13,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 268.5) internal successors, (537), 2 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:13,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:13,941 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:13,941 INFO L175 Difference]: Start difference. First operand has 263 places, 292 transitions, 644 flow. Second operand 2 states and 537 transitions. [2022-11-02 20:49:13,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 256 transitions, 592 flow [2022-11-02 20:49:13,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 256 transitions, 592 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:13,950 INFO L231 Difference]: Finished difference. Result has 263 places, 232 transitions, 509 flow [2022-11-02 20:49:13,951 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=509, PETRI_PLACES=263, PETRI_TRANSITIONS=232} [2022-11-02 20:49:13,952 INFO L287 CegarLoopForPetriNet]: 263 programPoint places, 0 predicate places. [2022-11-02 20:49:13,952 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 232 transitions, 509 flow [2022-11-02 20:49:13,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:13,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:13,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:13,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:49:13,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:13,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:13,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1997352057, now seen corresponding path program 1 times [2022-11-02 20:49:13,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:13,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009726344] [2022-11-02 20:49:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:13,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:14,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009726344] [2022-11-02 20:49:14,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009726344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:14,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:14,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:14,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970609304] [2022-11-02 20:49:14,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:14,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:14,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:14,036 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 292 [2022-11-02 20:49:14,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 232 transitions, 509 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:14,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 292 [2022-11-02 20:49:14,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:14,168 INFO L130 PetriNetUnfolder]: 0/332 cut-off events. [2022-11-02 20:49:14,169 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:49:14,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 332 events. 0/332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1019 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-02 20:49:14,170 INFO L137 encePairwiseOnDemand]: 289/292 looper letters, 14 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-11-02 20:49:14,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 236 transitions, 549 flow [2022-11-02 20:49:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-11-02 20:49:14,174 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8378995433789954 [2022-11-02 20:49:14,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-11-02 20:49:14,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-11-02 20:49:14,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:14,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-11-02 20:49:14,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,182 INFO L175 Difference]: Start difference. First operand has 263 places, 232 transitions, 509 flow. Second operand 3 states and 734 transitions. [2022-11-02 20:49:14,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 236 transitions, 549 flow [2022-11-02 20:49:14,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 236 transitions, 529 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:14,189 INFO L231 Difference]: Finished difference. Result has 247 places, 233 transitions, 501 flow [2022-11-02 20:49:14,190 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=501, PETRI_PLACES=247, PETRI_TRANSITIONS=233} [2022-11-02 20:49:14,191 INFO L287 CegarLoopForPetriNet]: 263 programPoint places, -16 predicate places. [2022-11-02 20:49:14,191 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 233 transitions, 501 flow [2022-11-02 20:49:14,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:14,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:14,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:49:14,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:14,194 INFO L85 PathProgramCache]: Analyzing trace with hash 446612663, now seen corresponding path program 1 times [2022-11-02 20:49:14,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:14,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578992540] [2022-11-02 20:49:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:14,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:14,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:14,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578992540] [2022-11-02 20:49:14,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578992540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:14,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736878684] [2022-11-02 20:49:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:14,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:14,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:14,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:14,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:49:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:14,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:14,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736878684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:14,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:14,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:14,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350925492] [2022-11-02 20:49:14,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:14,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:14,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:14,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:14,602 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 292 [2022-11-02 20:49:14,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 233 transitions, 501 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:14,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 292 [2022-11-02 20:49:14,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:14,814 INFO L130 PetriNetUnfolder]: 0/302 cut-off events. [2022-11-02 20:49:14,815 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:49:14,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 302 events. 0/302 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 829 event pairs, 0 based on Foata normal form. 2/304 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:49:14,817 INFO L137 encePairwiseOnDemand]: 286/292 looper letters, 15 selfloop transitions, 9 changer transitions 0/243 dead transitions. [2022-11-02 20:49:14,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 243 transitions, 571 flow [2022-11-02 20:49:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2168 transitions. [2022-11-02 20:49:14,824 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8249619482496194 [2022-11-02 20:49:14,824 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2168 transitions. [2022-11-02 20:49:14,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2168 transitions. [2022-11-02 20:49:14,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:14,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2168 transitions. [2022-11-02 20:49:14,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 240.88888888888889) internal successors, (2168), 9 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,842 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,842 INFO L175 Difference]: Start difference. First operand has 247 places, 233 transitions, 501 flow. Second operand 9 states and 2168 transitions. [2022-11-02 20:49:14,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 243 transitions, 571 flow [2022-11-02 20:49:14,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 243 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:14,849 INFO L231 Difference]: Finished difference. Result has 257 places, 239 transitions, 549 flow [2022-11-02 20:49:14,850 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=257, PETRI_TRANSITIONS=239} [2022-11-02 20:49:14,851 INFO L287 CegarLoopForPetriNet]: 263 programPoint places, -6 predicate places. [2022-11-02 20:49:14,851 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 239 transitions, 549 flow [2022-11-02 20:49:14,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:14,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:14,854 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:14,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:15,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ad0c96-5c4e-402b-ad58-b1a0840cf65f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:49:15,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1580915110, now seen corresponding path program 1 times [2022-11-02 20:49:15,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:15,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024543353] [2022-11-02 20:49:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:15,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:49:15,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:15,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024543353] [2022-11-02 20:49:15,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024543353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:15,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:15,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:49:15,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525066815] [2022-11-02 20:49:15,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:15,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:15,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:15,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:15,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:15,279 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 292 [2022-11-02 20:49:15,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 239 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:15,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:15,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 292 [2022-11-02 20:49:15,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand