./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_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_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/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_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/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_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/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 c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --- 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 20:12:33,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:12:33,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:12:33,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:12:33,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:12:33,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:12:33,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:12:33,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:12:33,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:12:33,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:12:33,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:12:33,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:12:33,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:12:33,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:12:33,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:12:33,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:12:33,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:12:33,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:12:33,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:12:33,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:12:33,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:12:33,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:12:33,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:12:33,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:12:33,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:12:33,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:12:33,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:12:33,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:12:33,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:12:33,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:12:33,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:12:33,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:12:33,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:12:33,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:12:33,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:12:33,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:12:33,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:12:33,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:12:33,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:12:33,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:12:33,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:12:33,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:12:33,452 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:12:33,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:12:33,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:12:33,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:12:33,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:12:33,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:12:33,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:12:33,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:12:33,457 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:12:33,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:12:33,459 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:12:33,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:12:33,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:12:33,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:12:33,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:12:33,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:12:33,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:12:33,461 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:12:33,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:12:33,461 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:12:33,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:12:33,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:12:33,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:12:33,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:12:33,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:12:33,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:12:33,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:12:33,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:12:33,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:12:33,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:12:33,464 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:12:33,465 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:12:33,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:12:33,465 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_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 [2022-11-02 20:12:33,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:12:33,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:12:33,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:12:33,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:12:33,835 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:12:33,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-11-02 20:12:33,938 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/data/20d340c2a/a065a4a1b088445898c1954ebffcd223/FLAGd9329f05a [2022-11-02 20:12:34,659 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:12:34,659 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-11-02 20:12:34,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/data/20d340c2a/a065a4a1b088445898c1954ebffcd223/FLAGd9329f05a [2022-11-02 20:12:34,889 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/data/20d340c2a/a065a4a1b088445898c1954ebffcd223 [2022-11-02 20:12:34,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:12:34,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:12:34,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:12:34,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:12:34,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:12:34,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:12:34" (1/1) ... [2022-11-02 20:12:34,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@706193f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:34, skipping insertion in model container [2022-11-02 20:12:34,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:12:34" (1/1) ... [2022-11-02 20:12:34,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:12:34,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:12:35,560 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_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-11-02 20:12:35,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:12:35,641 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:12:35,700 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_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-11-02 20:12:35,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:12:35,767 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:12:35,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35 WrapperNode [2022-11-02 20:12:35,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:12:35,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:12:35,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:12:35,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:12:35,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,869 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2022-11-02 20:12:35,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:12:35,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:12:35,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:12:35,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:12:35,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,931 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:12:35,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:12:35,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:12:35,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:12:35,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (1/1) ... [2022-11-02 20:12:35,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:12:35,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:35,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:12:36,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:12:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:12:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:12:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:12:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:12:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:12:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:12:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-02 20:12:36,055 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-02 20:12:36,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:12:36,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:12:36,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:12:36,058 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 20:12:36,269 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:12:36,272 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:12:36,671 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:12:36,683 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:12:36,683 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-11-02 20:12:36,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:12:36 BoogieIcfgContainer [2022-11-02 20:12:36,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:12:36,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:12:36,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:12:36,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:12:36,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:12:34" (1/3) ... [2022-11-02 20:12:36,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb7171f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:12:36, skipping insertion in model container [2022-11-02 20:12:36,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:35" (2/3) ... [2022-11-02 20:12:36,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb7171f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:12:36, skipping insertion in model container [2022-11-02 20:12:36,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:12:36" (3/3) ... [2022-11-02 20:12:36,701 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2022-11-02 20:12:36,722 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:12:36,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:12:36,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-02 20:12:36,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:12:36,815 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-02 20:12:36,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 255 transitions, 518 flow [2022-11-02 20:12:37,002 INFO L130 PetriNetUnfolder]: 73/394 cut-off events. [2022-11-02 20:12:37,003 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:12:37,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 394 events. 73/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1795 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2022-11-02 20:12:37,023 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 255 transitions, 518 flow [2022-11-02 20:12:37,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 250 transitions, 505 flow [2022-11-02 20:12:37,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:12:37,084 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;@2012c619, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:12:37,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:12:37,117 INFO L130 PetriNetUnfolder]: 19/156 cut-off events. [2022-11-02 20:12:37,118 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:12:37,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:37,119 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] [2022-11-02 20:12:37,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:12:37,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1961754262, now seen corresponding path program 1 times [2022-11-02 20:12:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:37,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128502031] [2022-11-02 20:12:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:37,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:37,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128502031] [2022-11-02 20:12:37,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128502031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:37,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:12:37,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:12:37,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081013962] [2022-11-02 20:12:37,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:12:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:37,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:12:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:12:37,606 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 255 [2022-11-02 20:12:37,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 250 transitions, 505 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:37,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:37,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 255 [2022-11-02 20:12:37,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:37,777 INFO L130 PetriNetUnfolder]: 9/325 cut-off events. [2022-11-02 20:12:37,778 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:12:37,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 325 events. 9/325 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1416 event pairs, 0 based on Foata normal form. 62/369 useless extension candidates. Maximal degree in co-relation 177. Up to 9 conditions per place. [2022-11-02 20:12:37,784 INFO L137 encePairwiseOnDemand]: 214/255 looper letters, 10 selfloop transitions, 2 changer transitions 0/213 dead transitions. [2022-11-02 20:12:37,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 213 transitions, 455 flow [2022-11-02 20:12:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:12:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:12:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2022-11-02 20:12:37,804 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8718954248366013 [2022-11-02 20:12:37,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2022-11-02 20:12:37,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2022-11-02 20:12:37,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:37,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2022-11-02 20:12:37,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 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 20:12:37,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:37,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:37,839 INFO L175 Difference]: Start difference. First operand has 209 places, 250 transitions, 505 flow. Second operand 3 states and 667 transitions. [2022-11-02 20:12:37,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 213 transitions, 455 flow [2022-11-02 20:12:37,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 213 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:12:37,882 INFO L231 Difference]: Finished difference. Result has 209 places, 210 transitions, 435 flow [2022-11-02 20:12:37,884 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=209, PETRI_TRANSITIONS=210} [2022-11-02 20:12:37,888 INFO L287 CegarLoopForPetriNet]: 209 programPoint places, 0 predicate places. [2022-11-02 20:12:37,889 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 210 transitions, 435 flow [2022-11-02 20:12:37,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:37,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:37,891 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] [2022-11-02 20:12:37,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:12:37,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:12:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:37,893 INFO L85 PathProgramCache]: Analyzing trace with hash -929438698, now seen corresponding path program 1 times [2022-11-02 20:12:37,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:37,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60404652] [2022-11-02 20:12:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:37,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:38,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:38,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60404652] [2022-11-02 20:12:38,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60404652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:38,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987179888] [2022-11-02 20:12:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:38,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:38,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:38,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:38,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:12:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:38,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:12:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:38,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:38,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987179888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:38,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:38,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:12:38,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070794427] [2022-11-02 20:12:38,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:12:38,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:12:38,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:12:38,591 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-02 20:12:38,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 210 transitions, 435 flow. Second operand has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:38,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:38,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-02 20:12:38,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:38,791 INFO L130 PetriNetUnfolder]: 9/332 cut-off events. [2022-11-02 20:12:38,791 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:12:38,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 332 events. 9/332 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1412 event pairs, 0 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 325. Up to 6 conditions per place. [2022-11-02 20:12:38,795 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 11 selfloop transitions, 9 changer transitions 0/220 dead transitions. [2022-11-02 20:12:38,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 220 transitions, 497 flow [2022-11-02 20:12:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:12:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:12:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1858 transitions. [2022-11-02 20:12:38,801 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8095860566448801 [2022-11-02 20:12:38,801 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1858 transitions. [2022-11-02 20:12:38,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1858 transitions. [2022-11-02 20:12:38,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:38,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1858 transitions. [2022-11-02 20:12:38,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 206.44444444444446) internal successors, (1858), 9 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:38,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:38,815 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:38,816 INFO L175 Difference]: Start difference. First operand has 209 places, 210 transitions, 435 flow. Second operand 9 states and 1858 transitions. [2022-11-02 20:12:38,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 220 transitions, 497 flow [2022-11-02 20:12:38,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 220 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:12:38,823 INFO L231 Difference]: Finished difference. Result has 219 places, 216 transitions, 483 flow [2022-11-02 20:12:38,824 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=483, PETRI_PLACES=219, PETRI_TRANSITIONS=216} [2022-11-02 20:12:38,825 INFO L287 CegarLoopForPetriNet]: 209 programPoint places, 10 predicate places. [2022-11-02 20:12:38,825 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 216 transitions, 483 flow [2022-11-02 20:12:38,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:38,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:38,827 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:38,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:39,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:39,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:12:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:39,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1473481706, now seen corresponding path program 2 times [2022-11-02 20:12:39,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:39,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543427856] [2022-11-02 20:12:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:39,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:39,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:39,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543427856] [2022-11-02 20:12:39,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543427856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:39,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131370394] [2022-11-02 20:12:39,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:12:39,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:39,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:39,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:39,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:12:39,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:12:39,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:12:39,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:39,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:39,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131370394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:39,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:39,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:12:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339405014] [2022-11-02 20:12:39,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:12:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:39,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:12:39,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:12:39,800 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-02 20:12:39,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 216 transitions, 483 flow. Second operand has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:39,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:39,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-02 20:12:39,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:40,120 INFO L130 PetriNetUnfolder]: 9/352 cut-off events. [2022-11-02 20:12:40,120 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-02 20:12:40,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 352 events. 9/352 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1408 event pairs, 0 based on Foata normal form. 4/339 useless extension candidates. Maximal degree in co-relation 301. Up to 11 conditions per place. [2022-11-02 20:12:40,125 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 19 selfloop transitions, 21 changer transitions 0/240 dead transitions. [2022-11-02 20:12:40,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 240 transitions, 671 flow [2022-11-02 20:12:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:12:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:12:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4328 transitions. [2022-11-02 20:12:40,136 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8082166199813259 [2022-11-02 20:12:40,137 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4328 transitions. [2022-11-02 20:12:40,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4328 transitions. [2022-11-02 20:12:40,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:40,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4328 transitions. [2022-11-02 20:12:40,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 206.0952380952381) internal successors, (4328), 21 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:40,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:40,166 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:40,166 INFO L175 Difference]: Start difference. First operand has 219 places, 216 transitions, 483 flow. Second operand 21 states and 4328 transitions. [2022-11-02 20:12:40,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 240 transitions, 671 flow [2022-11-02 20:12:40,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 240 transitions, 657 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:12:40,175 INFO L231 Difference]: Finished difference. Result has 243 places, 229 transitions, 607 flow [2022-11-02 20:12:40,176 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=607, PETRI_PLACES=243, PETRI_TRANSITIONS=229} [2022-11-02 20:12:40,177 INFO L287 CegarLoopForPetriNet]: 209 programPoint places, 34 predicate places. [2022-11-02 20:12:40,177 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 229 transitions, 607 flow [2022-11-02 20:12:40,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:40,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:40,180 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:40,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:40,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:40,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:12:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:40,399 INFO L85 PathProgramCache]: Analyzing trace with hash -898264042, now seen corresponding path program 3 times [2022-11-02 20:12:40,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:40,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633448216] [2022-11-02 20:12:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:40,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:40,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:40,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633448216] [2022-11-02 20:12:40,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633448216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:40,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631750290] [2022-11-02 20:12:40,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:12:40,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:40,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:40,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:12:40,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:12:40,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:40,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:12:40,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:41,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:12:41,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631750290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:41,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:41,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:12:41,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255849715] [2022-11-02 20:12:41,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:41,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:12:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:12:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:12:41,393 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-02 20:12:41,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 229 transitions, 607 flow. Second operand has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:41,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:41,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-02 20:12:41,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:41,910 INFO L130 PetriNetUnfolder]: 9/367 cut-off events. [2022-11-02 20:12:41,910 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-02 20:12:41,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 367 events. 9/367 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1404 event pairs, 0 based on Foata normal form. 3/353 useless extension candidates. Maximal degree in co-relation 363. Up to 17 conditions per place. [2022-11-02 20:12:41,915 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 25 selfloop transitions, 30 changer transitions 0/255 dead transitions. [2022-11-02 20:12:41,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 255 transitions, 863 flow [2022-11-02 20:12:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:12:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:12:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6178 transitions. [2022-11-02 20:12:41,929 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8075816993464052 [2022-11-02 20:12:41,929 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6178 transitions. [2022-11-02 20:12:41,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6178 transitions. [2022-11-02 20:12:41,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:41,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6178 transitions. [2022-11-02 20:12:41,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 205.93333333333334) internal successors, (6178), 30 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:41,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:41,968 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:41,968 INFO L175 Difference]: Start difference. First operand has 243 places, 229 transitions, 607 flow. Second operand 30 states and 6178 transitions. [2022-11-02 20:12:41,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 255 transitions, 863 flow [2022-11-02 20:12:41,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 255 transitions, 833 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-02 20:12:41,982 INFO L231 Difference]: Finished difference. Result has 270 places, 239 transitions, 735 flow [2022-11-02 20:12:41,982 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=735, PETRI_PLACES=270, PETRI_TRANSITIONS=239} [2022-11-02 20:12:41,983 INFO L287 CegarLoopForPetriNet]: 209 programPoint places, 61 predicate places. [2022-11-02 20:12:41,984 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 239 transitions, 735 flow [2022-11-02 20:12:41,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:41,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:41,987 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:42,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:42,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:42,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:12:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1658269334, now seen corresponding path program 4 times [2022-11-02 20:12:42,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:42,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077922993] [2022-11-02 20:12:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:12:42,233 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:12:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:12:42,294 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:12:42,294 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:12:42,296 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 20:12:42,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 20:12:42,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 20:12:42,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 20:12:42,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 20:12:42,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:12:42,306 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1] [2022-11-02 20:12:42,309 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:12:42,309 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:12:42,346 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:12:42,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 674 flow [2022-11-02 20:12:42,459 INFO L130 PetriNetUnfolder]: 118/631 cut-off events. [2022-11-02 20:12:42,460 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-02 20:12:42,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 631 events. 118/631 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3248 event pairs, 0 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2022-11-02 20:12:42,468 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 328 transitions, 674 flow [2022-11-02 20:12:42,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 328 transitions, 674 flow [2022-11-02 20:12:42,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:12:42,478 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;@2012c619, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:12:42,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:12:42,494 INFO L130 PetriNetUnfolder]: 20/176 cut-off events. [2022-11-02 20:12:42,494 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:12:42,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:42,494 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] [2022-11-02 20:12:42,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:12:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1114127539, now seen corresponding path program 1 times [2022-11-02 20:12:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:42,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015035868] [2022-11-02 20:12:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:42,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:42,519 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 20:12:42,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:42,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015035868] [2022-11-02 20:12:42,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015035868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:42,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:12:42,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:12:42,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456458967] [2022-11-02 20:12:42,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:42,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:12:42,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:12:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:12:42,523 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 328 [2022-11-02 20:12:42,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 328 transitions, 674 flow. Second operand has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:42,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 328 [2022-11-02 20:12:42,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:42,636 INFO L130 PetriNetUnfolder]: 17/522 cut-off events. [2022-11-02 20:12:42,636 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:12:42,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 522 events. 17/522 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2748 event pairs, 0 based on Foata normal form. 126/619 useless extension candidates. Maximal degree in co-relation 330. Up to 7 conditions per place. [2022-11-02 20:12:42,645 INFO L137 encePairwiseOnDemand]: 278/328 looper letters, 4 selfloop transitions, 0 changer transitions 0/274 dead transitions. [2022-11-02 20:12:42,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 274 transitions, 574 flow [2022-11-02 20:12:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:12:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:12:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 594 transitions. [2022-11-02 20:12:42,649 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9054878048780488 [2022-11-02 20:12:42,649 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 594 transitions. [2022-11-02 20:12:42,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 594 transitions. [2022-11-02 20:12:42,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:42,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 594 transitions. [2022-11-02 20:12:42,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 297.0) internal successors, (594), 2 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,655 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,655 INFO L175 Difference]: Start difference. First operand has 273 places, 328 transitions, 674 flow. Second operand 2 states and 594 transitions. [2022-11-02 20:12:42,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 274 transitions, 574 flow [2022-11-02 20:12:42,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 274 transitions, 574 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:12:42,662 INFO L231 Difference]: Finished difference. Result has 270 places, 274 transitions, 566 flow [2022-11-02 20:12:42,663 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=566, PETRI_PLACES=270, PETRI_TRANSITIONS=274} [2022-11-02 20:12:42,664 INFO L287 CegarLoopForPetriNet]: 273 programPoint places, -3 predicate places. [2022-11-02 20:12:42,664 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 274 transitions, 566 flow [2022-11-02 20:12:42,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:42,665 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] [2022-11-02 20:12:42,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:12:42,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:12:42,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:42,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1958084880, now seen corresponding path program 1 times [2022-11-02 20:12:42,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:42,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894911042] [2022-11-02 20:12:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:42,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:42,706 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 20:12:42,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:42,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894911042] [2022-11-02 20:12:42,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894911042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:42,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:12:42,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:12:42,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415191188] [2022-11-02 20:12:42,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:42,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:12:42,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:12:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:12:42,710 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-11-02 20:12:42,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 274 transitions, 566 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:42,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-11-02 20:12:42,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:42,867 INFO L130 PetriNetUnfolder]: 17/526 cut-off events. [2022-11-02 20:12:42,868 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:12:42,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 526 events. 17/526 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2744 event pairs, 0 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 554. Up to 14 conditions per place. [2022-11-02 20:12:42,876 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/278 dead transitions. [2022-11-02 20:12:42,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 278 transitions, 604 flow [2022-11-02 20:12:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:12:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:12:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-02 20:12:42,879 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.818089430894309 [2022-11-02 20:12:42,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-02 20:12:42,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-02 20:12:42,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:42,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-02 20:12:42,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,886 INFO L175 Difference]: Start difference. First operand has 270 places, 274 transitions, 566 flow. Second operand 3 states and 805 transitions. [2022-11-02 20:12:42,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 278 transitions, 604 flow [2022-11-02 20:12:42,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 278 transitions, 604 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:12:42,894 INFO L231 Difference]: Finished difference. Result has 273 places, 275 transitions, 578 flow [2022-11-02 20:12:42,895 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=578, PETRI_PLACES=273, PETRI_TRANSITIONS=275} [2022-11-02 20:12:42,895 INFO L287 CegarLoopForPetriNet]: 273 programPoint places, 0 predicate places. [2022-11-02 20:12:42,896 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 275 transitions, 578 flow [2022-11-02 20:12:42,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:42,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:42,897 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] [2022-11-02 20:12:42,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:12:42,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:12:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:42,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1150478808, now seen corresponding path program 1 times [2022-11-02 20:12:42,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:42,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877810546] [2022-11-02 20:12:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:42,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:42,977 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 20:12:42,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:42,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877810546] [2022-11-02 20:12:42,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877810546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:42,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251939549] [2022-11-02 20:12:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:42,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:42,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:42,980 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:43,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:12:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:43,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:12:43,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:12:43,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:12:43,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251939549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:43,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:12:43,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:12:43,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591852134] [2022-11-02 20:12:43,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:43,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:12:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:12:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:12:43,099 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-11-02 20:12:43,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 275 transitions, 578 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:43,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-11-02 20:12:43,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:43,209 INFO L130 PetriNetUnfolder]: 13/427 cut-off events. [2022-11-02 20:12:43,209 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-02 20:12:43,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 427 events. 13/427 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1980 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 463. Up to 16 conditions per place. [2022-11-02 20:12:43,217 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/279 dead transitions. [2022-11-02 20:12:43,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 279 transitions, 616 flow [2022-11-02 20:12:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:12:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:12:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-02 20:12:43,220 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.818089430894309 [2022-11-02 20:12:43,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-02 20:12:43,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-02 20:12:43,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:43,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-02 20:12:43,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,226 INFO L175 Difference]: Start difference. First operand has 273 places, 275 transitions, 578 flow. Second operand 3 states and 805 transitions. [2022-11-02 20:12:43,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 279 transitions, 616 flow [2022-11-02 20:12:43,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 279 transitions, 614 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:12:43,232 INFO L231 Difference]: Finished difference. Result has 275 places, 276 transitions, 588 flow [2022-11-02 20:12:43,232 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=588, PETRI_PLACES=275, PETRI_TRANSITIONS=276} [2022-11-02 20:12:43,233 INFO L287 CegarLoopForPetriNet]: 273 programPoint places, 2 predicate places. [2022-11-02 20:12:43,233 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 276 transitions, 588 flow [2022-11-02 20:12:43,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:43,234 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] [2022-11-02 20:12:43,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:43,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:12:43,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:12:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash -930708873, now seen corresponding path program 1 times [2022-11-02 20:12:43,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:43,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516888750] [2022-11-02 20:12:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:43,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:43,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:43,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516888750] [2022-11-02 20:12:43,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516888750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:43,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441028192] [2022-11-02 20:12:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:43,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:43,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:43,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:43,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:12:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:12:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:43,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:43,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441028192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:43,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:43,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:12:43,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965349282] [2022-11-02 20:12:43,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:43,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:12:43,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:12:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:12:43,715 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-02 20:12:43,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 276 transitions, 588 flow. Second operand has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:43,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-02 20:12:43,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:43,917 INFO L130 PetriNetUnfolder]: 13/434 cut-off events. [2022-11-02 20:12:43,917 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-02 20:12:43,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 434 events. 13/434 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1973 event pairs, 0 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 481. Up to 11 conditions per place. [2022-11-02 20:12:43,927 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 14 selfloop transitions, 9 changer transitions 0/286 dead transitions. [2022-11-02 20:12:43,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 286 transitions, 656 flow [2022-11-02 20:12:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:12:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:12:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2383 transitions. [2022-11-02 20:12:43,934 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8072493224932249 [2022-11-02 20:12:43,934 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2383 transitions. [2022-11-02 20:12:43,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2383 transitions. [2022-11-02 20:12:43,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:43,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2383 transitions. [2022-11-02 20:12:43,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 264.77777777777777) internal successors, (2383), 9 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,949 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,949 INFO L175 Difference]: Start difference. First operand has 275 places, 276 transitions, 588 flow. Second operand 9 states and 2383 transitions. [2022-11-02 20:12:43,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 286 transitions, 656 flow [2022-11-02 20:12:43,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 286 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:12:43,957 INFO L231 Difference]: Finished difference. Result has 285 places, 282 transitions, 636 flow [2022-11-02 20:12:43,958 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=636, PETRI_PLACES=285, PETRI_TRANSITIONS=282} [2022-11-02 20:12:43,959 INFO L287 CegarLoopForPetriNet]: 273 programPoint places, 12 predicate places. [2022-11-02 20:12:43,959 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 282 transitions, 636 flow [2022-11-02 20:12:43,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:43,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:43,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:44,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:44,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:44,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:12:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash 951543159, now seen corresponding path program 2 times [2022-11-02 20:12:44,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:44,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985224235] [2022-11-02 20:12:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:44,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:44,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985224235] [2022-11-02 20:12:44,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985224235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:44,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370620333] [2022-11-02 20:12:44,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:12:44,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:44,335 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:44,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:12:44,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:12:44,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:44,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:12:44,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:44,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:44,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370620333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:44,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:44,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:12:44,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634475203] [2022-11-02 20:12:44,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:44,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:12:44,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:44,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:12:44,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:12:44,611 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-02 20:12:44,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 282 transitions, 636 flow. Second operand has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:44,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:44,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-02 20:12:44,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:44,980 INFO L130 PetriNetUnfolder]: 13/454 cut-off events. [2022-11-02 20:12:44,980 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-02 20:12:44,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 454 events. 13/454 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1980 event pairs, 0 based on Foata normal form. 4/438 useless extension candidates. Maximal degree in co-relation 568. Up to 11 conditions per place. [2022-11-02 20:12:44,988 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 22 selfloop transitions, 21 changer transitions 0/306 dead transitions. [2022-11-02 20:12:44,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 306 transitions, 830 flow [2022-11-02 20:12:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:12:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:12:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5549 transitions. [2022-11-02 20:12:45,000 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8056039488966318 [2022-11-02 20:12:45,000 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5549 transitions. [2022-11-02 20:12:45,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5549 transitions. [2022-11-02 20:12:45,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:45,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5549 transitions. [2022-11-02 20:12:45,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 264.23809523809524) internal successors, (5549), 21 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:45,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:45,031 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:45,031 INFO L175 Difference]: Start difference. First operand has 285 places, 282 transitions, 636 flow. Second operand 21 states and 5549 transitions. [2022-11-02 20:12:45,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 306 transitions, 830 flow [2022-11-02 20:12:45,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 306 transitions, 816 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:12:45,039 INFO L231 Difference]: Finished difference. Result has 309 places, 295 transitions, 760 flow [2022-11-02 20:12:45,040 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=760, PETRI_PLACES=309, PETRI_TRANSITIONS=295} [2022-11-02 20:12:45,040 INFO L287 CegarLoopForPetriNet]: 273 programPoint places, 36 predicate places. [2022-11-02 20:12:45,040 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 295 transitions, 760 flow [2022-11-02 20:12:45,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:45,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:45,042 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:45,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:45,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:12:45,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:12:45,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash 290057079, now seen corresponding path program 3 times [2022-11-02 20:12:45,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:45,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082553997] [2022-11-02 20:12:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:45,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:45,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:45,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082553997] [2022-11-02 20:12:45,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082553997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823047767] [2022-11-02 20:12:45,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:12:45,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:45,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:45,647 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:45,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:12:45,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:12:45,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:45,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:12:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:45,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:46,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823047767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:46,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:46,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:12:46,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551073752] [2022-11-02 20:12:46,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:46,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:12:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:46,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:12:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:12:46,176 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-02 20:12:46,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 295 transitions, 760 flow. Second operand has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:46,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:46,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-02 20:12:46,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:46,693 INFO L130 PetriNetUnfolder]: 13/469 cut-off events. [2022-11-02 20:12:46,693 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-02 20:12:46,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 469 events. 13/469 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1975 event pairs, 0 based on Foata normal form. 3/452 useless extension candidates. Maximal degree in co-relation 664. Up to 17 conditions per place. [2022-11-02 20:12:46,702 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 28 selfloop transitions, 30 changer transitions 0/321 dead transitions. [2022-11-02 20:12:46,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 321 transitions, 1022 flow [2022-11-02 20:12:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:12:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:12:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7921 transitions. [2022-11-02 20:12:46,719 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8049796747967479 [2022-11-02 20:12:46,719 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7921 transitions. [2022-11-02 20:12:46,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7921 transitions. [2022-11-02 20:12:46,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:46,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7921 transitions. [2022-11-02 20:12:46,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 264.03333333333336) internal successors, (7921), 30 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:46,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:46,767 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:46,767 INFO L175 Difference]: Start difference. First operand has 309 places, 295 transitions, 760 flow. Second operand 30 states and 7921 transitions. [2022-11-02 20:12:46,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 321 transitions, 1022 flow [2022-11-02 20:12:46,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 321 transitions, 992 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-02 20:12:46,777 INFO L231 Difference]: Finished difference. Result has 336 places, 305 transitions, 888 flow [2022-11-02 20:12:46,778 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=888, PETRI_PLACES=336, PETRI_TRANSITIONS=305} [2022-11-02 20:12:46,779 INFO L287 CegarLoopForPetriNet]: 273 programPoint places, 63 predicate places. [2022-11-02 20:12:46,780 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 305 transitions, 888 flow [2022-11-02 20:12:46,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:46,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:46,785 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:46,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:46,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:46,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:12:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:46,999 INFO L85 PathProgramCache]: Analyzing trace with hash 686461615, now seen corresponding path program 4 times [2022-11-02 20:12:46,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:47,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929465416] [2022-11-02 20:12:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:47,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:12:47,028 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:12:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:12:47,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:12:47,056 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:12:47,056 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 20:12:47,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 20:12:47,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-02 20:12:47,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 20:12:47,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 20:12:47,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 20:12:47,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:12:47,058 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-02 20:12:47,058 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:12:47,058 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:12:47,110 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:12:47,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 401 transitions, 832 flow [2022-11-02 20:12:47,320 INFO L130 PetriNetUnfolder]: 168/901 cut-off events. [2022-11-02 20:12:47,320 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-02 20:12:47,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 901 events. 168/901 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4932 event pairs, 1 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 639. Up to 16 conditions per place. [2022-11-02 20:12:47,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 401 transitions, 832 flow [2022-11-02 20:12:47,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 401 transitions, 832 flow [2022-11-02 20:12:47,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:12:47,357 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;@2012c619, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:12:47,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 20:12:47,373 INFO L130 PetriNetUnfolder]: 22/182 cut-off events. [2022-11-02 20:12:47,373 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:12:47,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:47,374 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] [2022-11-02 20:12:47,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:12:47,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash 490789389, now seen corresponding path program 1 times [2022-11-02 20:12:47,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:47,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133787803] [2022-11-02 20:12:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:47,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:47,392 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 20:12:47,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:47,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133787803] [2022-11-02 20:12:47,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133787803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:47,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:12:47,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:12:47,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609620750] [2022-11-02 20:12:47,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:47,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:12:47,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:47,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:12:47,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:12:47,396 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 401 [2022-11-02 20:12:47,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 401 transitions, 832 flow. Second operand has 2 states, 2 states have (on average 329.5) internal successors, (659), 2 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:47,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 401 [2022-11-02 20:12:47,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:47,590 INFO L130 PetriNetUnfolder]: 27/749 cut-off events. [2022-11-02 20:12:47,591 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-02 20:12:47,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 749 events. 27/749 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4210 event pairs, 1 based on Foata normal form. 256/963 useless extension candidates. Maximal degree in co-relation 536. Up to 16 conditions per place. [2022-11-02 20:12:47,609 INFO L137 encePairwiseOnDemand]: 339/401 looper letters, 6 selfloop transitions, 0 changer transitions 0/334 dead transitions. [2022-11-02 20:12:47,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 334 transitions, 710 flow [2022-11-02 20:12:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:12:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:12:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-11-02 20:12:47,657 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9027431421446384 [2022-11-02 20:12:47,657 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-11-02 20:12:47,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-11-02 20:12:47,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:47,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-11-02 20:12:47,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 362.0) internal successors, (724), 2 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,661 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,662 INFO L175 Difference]: Start difference. First operand has 333 places, 401 transitions, 832 flow. Second operand 2 states and 724 transitions. [2022-11-02 20:12:47,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 334 transitions, 710 flow [2022-11-02 20:12:47,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 334 transitions, 710 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:12:47,670 INFO L231 Difference]: Finished difference. Result has 329 places, 334 transitions, 698 flow [2022-11-02 20:12:47,670 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=698, PETRI_PLACES=329, PETRI_TRANSITIONS=334} [2022-11-02 20:12:47,671 INFO L287 CegarLoopForPetriNet]: 333 programPoint places, -4 predicate places. [2022-11-02 20:12:47,671 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 334 transitions, 698 flow [2022-11-02 20:12:47,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 329.5) internal successors, (659), 2 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:47,672 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] [2022-11-02 20:12:47,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:12:47,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:12:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash -731965488, now seen corresponding path program 1 times [2022-11-02 20:12:47,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:47,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619137199] [2022-11-02 20:12:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:47,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:47,711 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 20:12:47,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619137199] [2022-11-02 20:12:47,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619137199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:47,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:12:47,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:12:47,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052756785] [2022-11-02 20:12:47,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:47,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:12:47,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:47,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:12:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:12:47,715 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-11-02 20:12:47,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 334 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:47,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-11-02 20:12:47,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:47,896 INFO L130 PetriNetUnfolder]: 27/753 cut-off events. [2022-11-02 20:12:47,896 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-02 20:12:47,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 753 events. 27/753 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4223 event pairs, 1 based on Foata normal form. 0/711 useless extension candidates. Maximal degree in co-relation 803. Up to 23 conditions per place. [2022-11-02 20:12:47,912 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/338 dead transitions. [2022-11-02 20:12:47,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 338 transitions, 740 flow [2022-11-02 20:12:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:12:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:12:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-11-02 20:12:47,914 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8154613466334164 [2022-11-02 20:12:47,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-11-02 20:12:47,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-11-02 20:12:47,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:47,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-11-02 20:12:47,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,920 INFO L175 Difference]: Start difference. First operand has 329 places, 334 transitions, 698 flow. Second operand 3 states and 981 transitions. [2022-11-02 20:12:47,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 338 transitions, 740 flow [2022-11-02 20:12:47,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 338 transitions, 740 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:12:47,927 INFO L231 Difference]: Finished difference. Result has 332 places, 335 transitions, 710 flow [2022-11-02 20:12:47,928 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=332, PETRI_TRANSITIONS=335} [2022-11-02 20:12:47,928 INFO L287 CegarLoopForPetriNet]: 333 programPoint places, -1 predicate places. [2022-11-02 20:12:47,929 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 335 transitions, 710 flow [2022-11-02 20:12:47,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:47,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:47,929 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] [2022-11-02 20:12:47,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:12:47,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:12:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:47,930 INFO L85 PathProgramCache]: Analyzing trace with hash 798570601, now seen corresponding path program 1 times [2022-11-02 20:12:47,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:47,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885559958] [2022-11-02 20:12:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:47,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:47,987 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 20:12:47,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:47,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885559958] [2022-11-02 20:12:47,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885559958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:47,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693450324] [2022-11-02 20:12:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:47,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:47,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:47,990 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:48,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:12:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:12:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:12:48,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:12:48,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693450324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:48,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:12:48,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:12:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141400828] [2022-11-02 20:12:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:48,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:12:48,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:48,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:12:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:12:48,136 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-11-02 20:12:48,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 335 transitions, 710 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:48,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:48,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-11-02 20:12:48,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:48,332 INFO L130 PetriNetUnfolder]: 23/654 cut-off events. [2022-11-02 20:12:48,333 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-02 20:12:48,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 654 events. 23/654 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3493 event pairs, 1 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 717. Up to 30 conditions per place. [2022-11-02 20:12:48,348 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/339 dead transitions. [2022-11-02 20:12:48,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 339 transitions, 752 flow [2022-11-02 20:12:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:12:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:12:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-11-02 20:12:48,355 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8154613466334164 [2022-11-02 20:12:48,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-11-02 20:12:48,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-11-02 20:12:48,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:48,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-11-02 20:12:48,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:48,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:48,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:48,362 INFO L175 Difference]: Start difference. First operand has 332 places, 335 transitions, 710 flow. Second operand 3 states and 981 transitions. [2022-11-02 20:12:48,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 339 transitions, 752 flow [2022-11-02 20:12:48,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 339 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:12:48,369 INFO L231 Difference]: Finished difference. Result has 334 places, 336 transitions, 720 flow [2022-11-02 20:12:48,370 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=720, PETRI_PLACES=334, PETRI_TRANSITIONS=336} [2022-11-02 20:12:48,372 INFO L287 CegarLoopForPetriNet]: 333 programPoint places, 1 predicate places. [2022-11-02 20:12:48,372 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 336 transitions, 720 flow [2022-11-02 20:12:48,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:48,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:48,373 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] [2022-11-02 20:12:48,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:48,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:48,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:12:48,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:48,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1599524314, now seen corresponding path program 1 times [2022-11-02 20:12:48,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:48,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860663768] [2022-11-02 20:12:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:48,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:12:48,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:48,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860663768] [2022-11-02 20:12:48,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860663768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115126727] [2022-11-02 20:12:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:48,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:48,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:48,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:48,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:12:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:48,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:12:48,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:12:48,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:12:48,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115126727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:48,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:12:48,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:12:48,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540097050] [2022-11-02 20:12:48,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:48,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:12:48,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:12:48,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:12:48,788 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-11-02 20:12:48,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 336 transitions, 720 flow. Second operand has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:48,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:48,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-11-02 20:12:48,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:49,085 INFO L130 PetriNetUnfolder]: 26/807 cut-off events. [2022-11-02 20:12:49,085 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-02 20:12:49,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 807 events. 26/807 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4003 event pairs, 1 based on Foata normal form. 0/769 useless extension candidates. Maximal degree in co-relation 890. Up to 36 conditions per place. [2022-11-02 20:12:49,101 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 16 selfloop transitions, 2 changer transitions 0/340 dead transitions. [2022-11-02 20:12:49,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 340 transitions, 764 flow [2022-11-02 20:12:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:12:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:12:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2022-11-02 20:12:49,104 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8137988362427265 [2022-11-02 20:12:49,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2022-11-02 20:12:49,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2022-11-02 20:12:49,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:49,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2022-11-02 20:12:49,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:49,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:49,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:49,110 INFO L175 Difference]: Start difference. First operand has 334 places, 336 transitions, 720 flow. Second operand 3 states and 979 transitions. [2022-11-02 20:12:49,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 340 transitions, 764 flow [2022-11-02 20:12:49,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 340 transitions, 762 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:12:49,118 INFO L231 Difference]: Finished difference. Result has 336 places, 337 transitions, 730 flow [2022-11-02 20:12:49,118 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=730, PETRI_PLACES=336, PETRI_TRANSITIONS=337} [2022-11-02 20:12:49,119 INFO L287 CegarLoopForPetriNet]: 333 programPoint places, 3 predicate places. [2022-11-02 20:12:49,119 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 337 transitions, 730 flow [2022-11-02 20:12:49,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:49,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:49,120 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] [2022-11-02 20:12:49,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:49,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:49,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:12:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1194190247, now seen corresponding path program 1 times [2022-11-02 20:12:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:49,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689733439] [2022-11-02 20:12:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:49,413 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 20:12:49,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:49,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689733439] [2022-11-02 20:12:49,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689733439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:49,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525566150] [2022-11-02 20:12:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:49,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:49,416 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:49,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:12:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:12:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:49,561 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 20:12:49,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:49,592 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 20:12:49,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525566150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:49,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:49,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:12:49,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330479379] [2022-11-02 20:12:49,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:49,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:12:49,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:49,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:12:49,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:12:49,598 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-11-02 20:12:49,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 337 transitions, 730 flow. Second operand has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:49,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:49,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-11-02 20:12:49,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:49,907 INFO L130 PetriNetUnfolder]: 26/814 cut-off events. [2022-11-02 20:12:49,907 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-02 20:12:49,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 814 events. 26/814 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3977 event pairs, 1 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 899. Up to 20 conditions per place. [2022-11-02 20:12:49,927 INFO L137 encePairwiseOnDemand]: 395/401 looper letters, 16 selfloop transitions, 9 changer transitions 0/347 dead transitions. [2022-11-02 20:12:49,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 347 transitions, 802 flow [2022-11-02 20:12:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:12:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:12:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2907 transitions. [2022-11-02 20:12:49,932 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8054862842892768 [2022-11-02 20:12:49,933 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2907 transitions. [2022-11-02 20:12:49,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2907 transitions. [2022-11-02 20:12:49,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:49,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2907 transitions. [2022-11-02 20:12:49,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.0) internal successors, (2907), 9 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:49,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:49,967 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:49,967 INFO L175 Difference]: Start difference. First operand has 336 places, 337 transitions, 730 flow. Second operand 9 states and 2907 transitions. [2022-11-02 20:12:49,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 347 transitions, 802 flow [2022-11-02 20:12:49,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 347 transitions, 800 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:12:49,974 INFO L231 Difference]: Finished difference. Result has 346 places, 343 transitions, 778 flow [2022-11-02 20:12:49,975 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=346, PETRI_TRANSITIONS=343} [2022-11-02 20:12:49,975 INFO L287 CegarLoopForPetriNet]: 333 programPoint places, 13 predicate places. [2022-11-02 20:12:49,975 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 343 transitions, 778 flow [2022-11-02 20:12:49,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:49,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:49,977 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:50,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:50,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:12:50,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:12:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1855352505, now seen corresponding path program 2 times [2022-11-02 20:12:50,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:50,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290202271] [2022-11-02 20:12:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:50,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:12:50,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:50,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290202271] [2022-11-02 20:12:50,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290202271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:50,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700214968] [2022-11-02 20:12:50,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:12:50,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:50,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:50,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:50,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6dc80a-9258-4d98-9c2c-8b0eae260ac8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:12:50,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:12:50,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:12:50,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:12:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:50,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-02 20:12:50,660 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:12:50,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:12:50,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-02 20:12:50,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:12:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:12:50,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:12:50,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700214968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:50,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:12:50,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2022-11-02 20:12:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689310742] [2022-11-02 20:12:50,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:12:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:12:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:12:50,922 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 401 [2022-11-02 20:12:50,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 343 transitions, 778 flow. Second operand has 12 states, 12 states have (on average 268.3333333333333) internal successors, (3220), 12 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:50,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:50,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 401 [2022-11-02 20:12:50,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand