./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:24:49,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:24:49,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:24:49,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:24:49,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:24:49,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:24:49,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:24:49,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:24:49,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:24:49,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:24:49,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:24:49,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:24:49,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:24:49,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:24:49,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:24:49,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:24:49,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:24:49,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:24:49,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:24:49,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:24:49,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:24:49,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:24:49,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:24:49,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:24:49,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:24:49,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:24:49,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:24:49,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:24:49,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:24:49,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:24:49,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:24:49,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:24:49,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:24:49,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:24:49,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:24:49,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:24:49,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:24:49,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:24:49,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:24:49,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:24:49,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:24:49,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:24:49,927 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:24:49,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:24:49,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:24:49,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:24:49,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:24:49,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:24:49,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:24:49,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:24:49,930 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:24:49,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:24:49,930 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:24:49,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:24:49,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:24:49,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:24:49,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:24:49,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:24:49,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:24:49,932 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:24:49,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:24:49,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:24:49,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:24:49,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:24:49,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:24:49,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:24:49,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:24:49,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:24:49,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:24:49,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:24:49,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:24:49,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:24:49,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:24:49,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:24:49,935 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:24:49,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:24:49,935 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2022-11-25 17:24:50,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:24:50,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:24:50,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:24:50,210 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:24:50,210 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:24:50,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2022-11-25 17:24:53,152 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:24:53,506 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:24:53,512 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2022-11-25 17:24:53,534 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/data/f430259ba/99251fff89a543d2a5a5e2ad744addcf/FLAGe3bba8e78 [2022-11-25 17:24:53,549 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/data/f430259ba/99251fff89a543d2a5a5e2ad744addcf [2022-11-25 17:24:53,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:24:53,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:24:53,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:53,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:24:53,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:24:53,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:53" (1/1) ... [2022-11-25 17:24:53,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c11e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:53, skipping insertion in model container [2022-11-25 17:24:53,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:53" (1/1) ... [2022-11-25 17:24:53,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:24:53,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:24:54,173 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2022-11-25 17:24:54,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:54,225 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:24:54,269 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2022-11-25 17:24:54,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:54,356 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:24:54,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54 WrapperNode [2022-11-25 17:24:54,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:54,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:24:54,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:24:54,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:24:54,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,438 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 193 [2022-11-25 17:24:54,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:24:54,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:24:54,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:24:54,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:24:54,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,501 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:24:54,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:24:54,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:24:54,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:24:54,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (1/1) ... [2022-11-25 17:24:54,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:24:54,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:54,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:24:54,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:24:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:24:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:24:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:24:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:24:54,616 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:24:54,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:24:54,618 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 17:24:54,618 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 17:24:54,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:24:54,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:24:54,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:24:54,620 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:24:54,765 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:24:54,768 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:24:55,257 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:24:55,265 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:24:55,265 INFO L300 CfgBuilder]: Removed 25 assume(true) statements. [2022-11-25 17:24:55,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:24:55 BoogieIcfgContainer [2022-11-25 17:24:55,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:24:55,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:24:55,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:24:55,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:24:55,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:24:53" (1/3) ... [2022-11-25 17:24:55,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d126f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:24:55, skipping insertion in model container [2022-11-25 17:24:55,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:54" (2/3) ... [2022-11-25 17:24:55,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d126f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:24:55, skipping insertion in model container [2022-11-25 17:24:55,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:24:55" (3/3) ... [2022-11-25 17:24:55,278 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2022-11-25 17:24:55,287 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:24:55,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:24:55,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 17:24:55,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:24:55,372 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 17:24:55,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 200 transitions, 408 flow [2022-11-25 17:24:55,531 INFO L130 PetriNetUnfolder]: 49/284 cut-off events. [2022-11-25 17:24:55,531 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:24:55,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 284 events. 49/284 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1026 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2022-11-25 17:24:55,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 200 transitions, 408 flow [2022-11-25 17:24:55,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 195 transitions, 395 flow [2022-11-25 17:24:55,551 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:24:55,567 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 195 transitions, 395 flow [2022-11-25 17:24:55,570 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 195 transitions, 395 flow [2022-11-25 17:24:55,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 195 transitions, 395 flow [2022-11-25 17:24:55,656 INFO L130 PetriNetUnfolder]: 48/279 cut-off events. [2022-11-25 17:24:55,657 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:24:55,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 279 events. 48/279 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 970 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2022-11-25 17:24:55,667 INFO L119 LiptonReduction]: Number of co-enabled transitions 12780 [2022-11-25 17:24:59,226 INFO L134 LiptonReduction]: Checked pairs total: 17422 [2022-11-25 17:24:59,226 INFO L136 LiptonReduction]: Total number of compositions: 171 [2022-11-25 17:24:59,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:24:59,263 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;@3824d1c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:24:59,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:24:59,269 INFO L130 PetriNetUnfolder]: 11/34 cut-off events. [2022-11-25 17:24:59,270 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:24:59,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:59,271 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:59,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:24:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:59,278 INFO L85 PathProgramCache]: Analyzing trace with hash 870960255, now seen corresponding path program 1 times [2022-11-25 17:24:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:59,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585482263] [2022-11-25 17:24:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:59,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:59,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:59,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585482263] [2022-11-25 17:24:59,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585482263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:59,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:59,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:24:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671160254] [2022-11-25 17:24:59,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:59,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:24:59,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:24:59,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:24:59,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 371 [2022-11-25 17:24:59,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 70 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:59,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 371 [2022-11-25 17:24:59,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:59,846 INFO L130 PetriNetUnfolder]: 327/698 cut-off events. [2022-11-25 17:24:59,846 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:24:59,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 698 events. 327/698 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3383 event pairs, 256 based on Foata normal form. 159/726 useless extension candidates. Maximal degree in co-relation 1257. Up to 609 conditions per place. [2022-11-25 17:24:59,852 INFO L137 encePairwiseOnDemand]: 346/371 looper letters, 37 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2022-11-25 17:24:59,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 181 flow [2022-11-25 17:24:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:24:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:24:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2022-11-25 17:24:59,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5004492362982929 [2022-11-25 17:24:59,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2022-11-25 17:24:59,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2022-11-25 17:24:59,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:59,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2022-11-25 17:24:59,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,899 INFO L175 Difference]: Start difference. First operand has 47 places, 70 transitions, 145 flow. Second operand 3 states and 557 transitions. [2022-11-25 17:24:59,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 181 flow [2022-11-25 17:24:59,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:24:59,905 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 113 flow [2022-11-25 17:24:59,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2022-11-25 17:24:59,913 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2022-11-25 17:24:59,913 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 113 flow [2022-11-25 17:24:59,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:59,914 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:59,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:24:59,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:24:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash 59532656, now seen corresponding path program 1 times [2022-11-25 17:24:59,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:59,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794493192] [2022-11-25 17:24:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:59,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:00,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794493192] [2022-11-25 17:25:00,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794493192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77111187] [2022-11-25 17:25:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:00,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:00,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:00,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:00,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:25:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:25:00,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:00,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:00,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77111187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:00,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:25:00,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 17:25:00,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757728705] [2022-11-25 17:25:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:00,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:00,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:25:00,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 371 [2022-11-25 17:25:00,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:00,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 371 [2022-11-25 17:25:00,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:00,401 INFO L130 PetriNetUnfolder]: 309/706 cut-off events. [2022-11-25 17:25:00,402 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:25:00,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 706 events. 309/706 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3730 event pairs, 0 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 1307. Up to 565 conditions per place. [2022-11-25 17:25:00,406 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 55 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-11-25 17:25:00,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 263 flow [2022-11-25 17:25:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2022-11-25 17:25:00,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2022-11-25 17:25:00,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2022-11-25 17:25:00,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2022-11-25 17:25:00,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:00,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2022-11-25 17:25:00,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,417 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 113 flow. Second operand 3 states and 552 transitions. [2022-11-25 17:25:00,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 263 flow [2022-11-25 17:25:00,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 259 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:00,420 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 117 flow [2022-11-25 17:25:00,420 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2022-11-25 17:25:00,421 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2022-11-25 17:25:00,421 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 117 flow [2022-11-25 17:25:00,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:00,422 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:00,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:00,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:00,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:25:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash 76652383, now seen corresponding path program 1 times [2022-11-25 17:25:00,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:00,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470660243] [2022-11-25 17:25:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:00,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:25:00,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:00,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470660243] [2022-11-25 17:25:00,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470660243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:00,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305267844] [2022-11-25 17:25:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:00,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:00,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:00,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:00,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:25:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:00,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:25:00,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:25:00,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:25:00,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305267844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:00,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:00,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:25:00,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441863169] [2022-11-25 17:25:00,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:00,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:25:00,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:00,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:25:00,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:25:00,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-11-25 17:25:00,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:00,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-11-25 17:25:00,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:01,119 INFO L130 PetriNetUnfolder]: 323/693 cut-off events. [2022-11-25 17:25:01,120 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-25 17:25:01,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 693 events. 323/693 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3272 event pairs, 256 based on Foata normal form. 3/584 useless extension candidates. Maximal degree in co-relation 1325. Up to 588 conditions per place. [2022-11-25 17:25:01,124 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 37 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2022-11-25 17:25:01,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 213 flow [2022-11-25 17:25:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:25:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:25:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1029 transitions. [2022-11-25 17:25:01,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2022-11-25 17:25:01,128 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1029 transitions. [2022-11-25 17:25:01,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1029 transitions. [2022-11-25 17:25:01,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:01,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1029 transitions. [2022-11-25 17:25:01,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:01,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:01,138 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:01,139 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 117 flow. Second operand 6 states and 1029 transitions. [2022-11-25 17:25:01,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 213 flow [2022-11-25 17:25:01,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:25:01,143 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 149 flow [2022-11-25 17:25:01,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2022-11-25 17:25:01,145 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2022-11-25 17:25:01,145 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 149 flow [2022-11-25 17:25:01,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:01,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:01,146 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-25 17:25:01,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:01,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:01,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:25:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1430665902, now seen corresponding path program 2 times [2022-11-25 17:25:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:01,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126772986] [2022-11-25 17:25:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:01,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:25:01,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:01,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126772986] [2022-11-25 17:25:01,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126772986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:01,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309983637] [2022-11-25 17:25:01,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:25:01,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:01,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:01,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:01,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:25:01,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:25:01,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:01,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:25:01,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:25:01,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:25:01,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309983637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:01,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:01,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:25:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29326557] [2022-11-25 17:25:01,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:01,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:25:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:01,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:25:01,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:25:01,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-11-25 17:25:01,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 149 flow. Second operand has 13 states, 13 states have (on average 165.30769230769232) internal successors, (2149), 13 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:01,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:01,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-11-25 17:25:01,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:01,979 INFO L130 PetriNetUnfolder]: 323/699 cut-off events. [2022-11-25 17:25:01,979 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2022-11-25 17:25:01,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373 conditions, 699 events. 323/699 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3293 event pairs, 256 based on Foata normal form. 6/593 useless extension candidates. Maximal degree in co-relation 1314. Up to 588 conditions per place. [2022-11-25 17:25:01,983 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 37 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2022-11-25 17:25:01,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 58 transitions, 281 flow [2022-11-25 17:25:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:25:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:25:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2022 transitions. [2022-11-25 17:25:01,988 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45417789757412397 [2022-11-25 17:25:01,989 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2022 transitions. [2022-11-25 17:25:01,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2022 transitions. [2022-11-25 17:25:01,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:01,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2022 transitions. [2022-11-25 17:25:01,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.5) internal successors, (2022), 12 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:02,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:02,004 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:02,005 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 149 flow. Second operand 12 states and 2022 transitions. [2022-11-25 17:25:02,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 58 transitions, 281 flow [2022-11-25 17:25:02,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 267 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:02,008 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 219 flow [2022-11-25 17:25:02,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=219, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2022-11-25 17:25:02,009 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 26 predicate places. [2022-11-25 17:25:02,009 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 219 flow [2022-11-25 17:25:02,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 165.30769230769232) internal successors, (2149), 13 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:02,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:02,010 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-25 17:25:02,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:02,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:02,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:25:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash -783528690, now seen corresponding path program 3 times [2022-11-25 17:25:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:02,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929763408] [2022-11-25 17:25:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:02,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:25:02,262 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:25:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:25:02,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:25:02,315 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:25:02,316 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 17:25:02,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 17:25:02,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 17:25:02,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 17:25:02,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:25:02,320 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-11-25 17:25:02,331 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:25:02,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:25:02,381 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:25:02,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 273 transitions, 564 flow [2022-11-25 17:25:02,455 INFO L130 PetriNetUnfolder]: 82/466 cut-off events. [2022-11-25 17:25:02,456 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:25:02,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 466 events. 82/466 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2079 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 286. Up to 12 conditions per place. [2022-11-25 17:25:02,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 273 transitions, 564 flow [2022-11-25 17:25:02,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 273 transitions, 564 flow [2022-11-25 17:25:02,464 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:25:02,465 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 273 transitions, 564 flow [2022-11-25 17:25:02,465 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 273 transitions, 564 flow [2022-11-25 17:25:02,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 273 transitions, 564 flow [2022-11-25 17:25:02,533 INFO L130 PetriNetUnfolder]: 82/466 cut-off events. [2022-11-25 17:25:02,533 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:25:02,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 466 events. 82/466 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2079 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 286. Up to 12 conditions per place. [2022-11-25 17:25:02,559 INFO L119 LiptonReduction]: Number of co-enabled transitions 37204 [2022-11-25 17:25:06,941 INFO L134 LiptonReduction]: Checked pairs total: 57718 [2022-11-25 17:25:06,942 INFO L136 LiptonReduction]: Total number of compositions: 235 [2022-11-25 17:25:06,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:25:06,950 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;@3824d1c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:25:06,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 17:25:06,956 INFO L130 PetriNetUnfolder]: 11/33 cut-off events. [2022-11-25 17:25:06,957 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:25:06,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:06,957 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:06,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:25:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash 637266584, now seen corresponding path program 1 times [2022-11-25 17:25:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:06,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470556986] [2022-11-25 17:25:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:06,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:07,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470556986] [2022-11-25 17:25:07,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470556986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:07,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:07,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:25:07,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648649783] [2022-11-25 17:25:07,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:07,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:07,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:07,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:07,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 508 [2022-11-25 17:25:07,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 107 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:07,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:07,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 508 [2022-11-25 17:25:07,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:09,190 INFO L130 PetriNetUnfolder]: 12819/19923 cut-off events. [2022-11-25 17:25:09,190 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-25 17:25:09,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38260 conditions, 19923 events. 12819/19923 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 131268 event pairs, 10970 based on Foata normal form. 3366/19533 useless extension candidates. Maximal degree in co-relation 15484. Up to 18227 conditions per place. [2022-11-25 17:25:09,301 INFO L137 encePairwiseOnDemand]: 473/508 looper letters, 61 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-11-25 17:25:09,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 296 flow [2022-11-25 17:25:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2022-11-25 17:25:09,308 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5019685039370079 [2022-11-25 17:25:09,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2022-11-25 17:25:09,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2022-11-25 17:25:09,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:09,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2022-11-25 17:25:09,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:09,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:09,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:09,316 INFO L175 Difference]: Start difference. First operand has 71 places, 107 transitions, 232 flow. Second operand 3 states and 765 transitions. [2022-11-25 17:25:09,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 296 flow [2022-11-25 17:25:09,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 296 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:25:09,320 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 180 flow [2022-11-25 17:25:09,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2022-11-25 17:25:09,324 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2022-11-25 17:25:09,324 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 180 flow [2022-11-25 17:25:09,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:09,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:09,325 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:09,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:25:09,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:25:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:09,326 INFO L85 PathProgramCache]: Analyzing trace with hash 133715799, now seen corresponding path program 1 times [2022-11-25 17:25:09,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:09,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255416462] [2022-11-25 17:25:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:09,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:09,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:09,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255416462] [2022-11-25 17:25:09,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255416462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:09,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253066527] [2022-11-25 17:25:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:09,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:09,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:09,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:25:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:25:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:09,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:09,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253066527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:09,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:25:09,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 17:25:09,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154028776] [2022-11-25 17:25:09,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:09,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:09,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:25:09,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 508 [2022-11-25 17:25:09,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:09,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:09,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 508 [2022-11-25 17:25:09,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:11,345 INFO L130 PetriNetUnfolder]: 12636/19960 cut-off events. [2022-11-25 17:25:11,345 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-25 17:25:11,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38310 conditions, 19960 events. 12636/19960 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 136492 event pairs, 5190 based on Foata normal form. 0/16133 useless extension candidates. Maximal degree in co-relation 38297. Up to 18191 conditions per place. [2022-11-25 17:25:11,462 INFO L137 encePairwiseOnDemand]: 505/508 looper letters, 81 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2022-11-25 17:25:11,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 96 transitions, 386 flow [2022-11-25 17:25:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2022-11-25 17:25:11,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49343832020997375 [2022-11-25 17:25:11,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2022-11-25 17:25:11,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2022-11-25 17:25:11,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:11,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2022-11-25 17:25:11,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:11,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:11,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:11,476 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 180 flow. Second operand 3 states and 752 transitions. [2022-11-25 17:25:11,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 96 transitions, 386 flow [2022-11-25 17:25:11,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:11,483 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 188 flow [2022-11-25 17:25:11,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2022-11-25 17:25:11,485 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2022-11-25 17:25:11,485 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 188 flow [2022-11-25 17:25:11,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:11,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:11,486 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:11,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:11,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:25:11,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:25:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1746616890, now seen corresponding path program 1 times [2022-11-25 17:25:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186272808] [2022-11-25 17:25:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:11,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:11,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:11,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186272808] [2022-11-25 17:25:11,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186272808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102766523] [2022-11-25 17:25:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:11,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:11,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:11,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:11,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:25:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:25:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:11,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:11,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102766523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:11,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:11,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:25:11,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173235975] [2022-11-25 17:25:11,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:11,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:25:11,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:11,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:25:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:25:11,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 508 [2022-11-25 17:25:11,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 188 flow. Second operand has 7 states, 7 states have (on average 224.14285714285714) internal successors, (1569), 7 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:11,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:11,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 508 [2022-11-25 17:25:11,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:13,807 INFO L130 PetriNetUnfolder]: 12906/20015 cut-off events. [2022-11-25 17:25:13,807 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2022-11-25 17:25:13,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38979 conditions, 20015 events. 12906/20015 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 131866 event pairs, 10970 based on Foata normal form. 3/16544 useless extension candidates. Maximal degree in co-relation 38951. Up to 18211 conditions per place. [2022-11-25 17:25:13,910 INFO L137 encePairwiseOnDemand]: 505/508 looper letters, 62 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2022-11-25 17:25:13,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 334 flow [2022-11-25 17:25:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:25:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:25:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1401 transitions. [2022-11-25 17:25:13,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4596456692913386 [2022-11-25 17:25:13,915 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1401 transitions. [2022-11-25 17:25:13,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1401 transitions. [2022-11-25 17:25:13,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:13,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1401 transitions. [2022-11-25 17:25:13,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.5) internal successors, (1401), 6 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:13,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:13,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:13,927 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 188 flow. Second operand 6 states and 1401 transitions. [2022-11-25 17:25:13,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 334 flow [2022-11-25 17:25:13,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:13,934 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 222 flow [2022-11-25 17:25:13,934 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2022-11-25 17:25:13,935 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2022-11-25 17:25:13,936 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 222 flow [2022-11-25 17:25:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 224.14285714285714) internal successors, (1569), 7 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:13,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:13,937 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:13,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:14,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 17:25:14,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:25:14,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1286811397, now seen corresponding path program 2 times [2022-11-25 17:25:14,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:14,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056945500] [2022-11-25 17:25:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:14,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:14,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:14,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056945500] [2022-11-25 17:25:14,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056945500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:14,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669147112] [2022-11-25 17:25:14,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:25:14,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:14,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:14,265 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:14,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:25:14,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:25:14,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:25:14,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:14,403 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 17:25:14,480 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:25:14,480 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 17:25:14,505 INFO L350 Elim1Store]: Elim1 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 [2022-11-25 17:25:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:25:14,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:14,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669147112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:14,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:25:14,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-11-25 17:25:14,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957971048] [2022-11-25 17:25:14,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:14,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:25:14,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:25:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:25:14,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 508 [2022-11-25 17:25:14,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:14,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:14,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 508 [2022-11-25 17:25:14,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:16,980 INFO L130 PetriNetUnfolder]: 17133/26785 cut-off events. [2022-11-25 17:25:16,980 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2022-11-25 17:25:17,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52884 conditions, 26785 events. 17133/26785 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 191272 event pairs, 2079 based on Foata normal form. 0/21866 useless extension candidates. Maximal degree in co-relation 52848. Up to 17957 conditions per place. [2022-11-25 17:25:17,108 INFO L137 encePairwiseOnDemand]: 500/508 looper letters, 171 selfloop transitions, 14 changer transitions 0/198 dead transitions. [2022-11-25 17:25:17,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 198 transitions, 862 flow [2022-11-25 17:25:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:25:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:25:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1452 transitions. [2022-11-25 17:25:17,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4763779527559055 [2022-11-25 17:25:17,113 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1452 transitions. [2022-11-25 17:25:17,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1452 transitions. [2022-11-25 17:25:17,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:17,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1452 transitions. [2022-11-25 17:25:17,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:17,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:17,124 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:17,124 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 222 flow. Second operand 6 states and 1452 transitions. [2022-11-25 17:25:17,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 198 transitions, 862 flow [2022-11-25 17:25:17,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 198 transitions, 848 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:17,129 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 295 flow [2022-11-25 17:25:17,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2022-11-25 17:25:17,130 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2022-11-25 17:25:17,130 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 295 flow [2022-11-25 17:25:17,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:17,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:17,131 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:17,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:17,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:17,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:25:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:17,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2040527095, now seen corresponding path program 1 times [2022-11-25 17:25:17,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:17,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140433580] [2022-11-25 17:25:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:17,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:25:17,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:17,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140433580] [2022-11-25 17:25:17,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140433580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797702345] [2022-11-25 17:25:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:17,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:17,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:17,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:25:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:25:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:17,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:17,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797702345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:17,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:17,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-11-25 17:25:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384233565] [2022-11-25 17:25:17,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:17,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:25:17,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:25:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:25:17,695 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 508 [2022-11-25 17:25:17,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 295 flow. Second operand has 14 states, 14 states have (on average 220.85714285714286) internal successors, (3092), 14 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:17,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:17,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 508 [2022-11-25 17:25:17,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:20,558 INFO L130 PetriNetUnfolder]: 17232/27247 cut-off events. [2022-11-25 17:25:20,559 INFO L131 PetriNetUnfolder]: For 5044/5044 co-relation queries the response was YES. [2022-11-25 17:25:20,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58991 conditions, 27247 events. 17232/27247 cut-off events. For 5044/5044 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 198224 event pairs, 212 based on Foata normal form. 36/23836 useless extension candidates. Maximal degree in co-relation 58932. Up to 24122 conditions per place. [2022-11-25 17:25:20,675 INFO L137 encePairwiseOnDemand]: 503/508 looper letters, 131 selfloop transitions, 14 changer transitions 0/158 dead transitions. [2022-11-25 17:25:20,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 783 flow [2022-11-25 17:25:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:25:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:25:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3200 transitions. [2022-11-25 17:25:20,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4499437570303712 [2022-11-25 17:25:20,686 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3200 transitions. [2022-11-25 17:25:20,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3200 transitions. [2022-11-25 17:25:20,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:20,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3200 transitions. [2022-11-25 17:25:20,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 228.57142857142858) internal successors, (3200), 14 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:20,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 508.0) internal successors, (7620), 15 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:20,708 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 508.0) internal successors, (7620), 15 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:20,708 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 295 flow. Second operand 14 states and 3200 transitions. [2022-11-25 17:25:20,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 783 flow [2022-11-25 17:25:20,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 158 transitions, 783 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:25:20,736 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 365 flow [2022-11-25 17:25:20,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=365, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2022-11-25 17:25:20,737 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2022-11-25 17:25:20,737 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 365 flow [2022-11-25 17:25:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 220.85714285714286) internal successors, (3092), 14 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:20,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:20,739 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 17:25:20,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:20,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d53a836-ea3a-4266-bbd7-9da870a95952/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:25:20,945 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:25:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash 812031991, now seen corresponding path program 1 times [2022-11-25 17:25:20,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595693376] [2022-11-25 17:25:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:25:20,976 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:25:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:25:21,009 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:25:21,009 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:25:21,009 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 17:25:21,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 17:25:21,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 17:25:21,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 17:25:21,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 17:25:21,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:25:21,010 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-11-25 17:25:21,012 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:25:21,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:25:21,066 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:25:21,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 346 transitions, 722 flow [2022-11-25 17:25:21,189 INFO L130 PetriNetUnfolder]: 120/681 cut-off events. [2022-11-25 17:25:21,189 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:25:21,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 681 events. 120/681 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3315 event pairs, 1 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 474. Up to 16 conditions per place. [2022-11-25 17:25:21,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 346 transitions, 722 flow [2022-11-25 17:25:21,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 346 transitions, 722 flow [2022-11-25 17:25:21,207 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:25:21,207 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 346 transitions, 722 flow [2022-11-25 17:25:21,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 346 transitions, 722 flow [2022-11-25 17:25:21,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 346 transitions, 722 flow [2022-11-25 17:25:21,322 INFO L130 PetriNetUnfolder]: 120/681 cut-off events. [2022-11-25 17:25:21,322 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:25:21,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 681 events. 120/681 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3315 event pairs, 1 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 474. Up to 16 conditions per place. [2022-11-25 17:25:21,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 71568 [2022-11-25 17:25:27,008 INFO L134 LiptonReduction]: Checked pairs total: 115987 [2022-11-25 17:25:27,009 INFO L136 LiptonReduction]: Total number of compositions: 301 [2022-11-25 17:25:27,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:25:27,011 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;@3824d1c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:25:27,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 17:25:27,015 INFO L130 PetriNetUnfolder]: 11/33 cut-off events. [2022-11-25 17:25:27,016 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:25:27,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:27,016 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:27,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 17:25:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:27,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1957239675, now seen corresponding path program 1 times [2022-11-25 17:25:27,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:27,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481493504] [2022-11-25 17:25:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:27,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481493504] [2022-11-25 17:25:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481493504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:27,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:27,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:25:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212009192] [2022-11-25 17:25:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:27,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:27,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:27,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 647 [2022-11-25 17:25:27,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 140 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:27,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:27,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 647 [2022-11-25 17:25:27,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand