./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8 --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 44de34ccc7195f8ba562241ad79de4cb2add35f6ad2c59de465184820d6f6382 --- 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-e04fb08 [2022-11-16 12:22:00,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:22:00,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:22:00,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:22:00,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:22:00,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:22:00,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:22:00,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:22:00,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:22:00,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:22:00,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:22:00,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:22:00,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:22:00,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:22:00,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:22:00,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:22:00,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:22:00,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:22:00,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:22:00,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:22:00,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:22:00,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:22:00,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:22:00,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:22:00,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:22:00,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:22:00,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:22:00,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:22:00,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:22:00,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:22:00,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:22:00,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:22:00,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:22:00,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:22:00,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:22:00,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:22:00,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:22:00,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:22:00,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:22:00,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:22:00,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:22:00,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:22:00,618 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:22:00,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:22:00,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:22:00,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:22:00,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:22:00,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:22:00,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:22:00,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:22:00,635 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:22:00,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:22:00,635 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:22:00,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:22:00,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:22:00,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:22:00,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:22:00,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:22:00,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:22:00,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:22:00,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:22:00,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:22:00,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:22:00,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:22:00,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:22:00,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:22:00,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:22:00,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:22:00,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:22:00,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:22:00,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:22:00,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:22:00,639 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:22:00,640 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:22:00,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:22:00,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44de34ccc7195f8ba562241ad79de4cb2add35f6ad2c59de465184820d6f6382 [2022-11-16 12:22:00,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:22:00,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:22:00,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:22:00,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:22:00,936 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:22:00,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i [2022-11-16 12:22:00,997 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/data/d51e80c34/ef6759e9a562403a8a25a49c9c6a367d/FLAG7fef4eb78 [2022-11-16 12:22:01,578 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:22:01,578 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i [2022-11-16 12:22:01,596 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/data/d51e80c34/ef6759e9a562403a8a25a49c9c6a367d/FLAG7fef4eb78 [2022-11-16 12:22:01,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/data/d51e80c34/ef6759e9a562403a8a25a49c9c6a367d [2022-11-16 12:22:01,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:22:01,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:22:01,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:22:01,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:22:01,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:22:01,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:22:01" (1/1) ... [2022-11-16 12:22:01,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a99c749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:01, skipping insertion in model container [2022-11-16 12:22:01,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:22:01" (1/1) ... [2022-11-16 12:22:01,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:22:01,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:22:02,202 WARN L229 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_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i[818,831] [2022-11-16 12:22:02,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:22:02,674 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:22:02,685 WARN L229 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_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-3.i[818,831] [2022-11-16 12:22:02,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:22:02,799 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:22:02,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02 WrapperNode [2022-11-16 12:22:02,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:22:02,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:22:02,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:22:02,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:22:02,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,851 INFO L138 Inliner]: procedures = 365, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2022-11-16 12:22:02,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:22:02,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:22:02,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:22:02,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:22:02,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,876 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:22:02,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:22:02,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:22:02,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:22:02,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (1/1) ... [2022-11-16 12:22:02,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:22:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:02,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:22:02,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:22:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:22:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:22:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:22:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:22:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:22:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2022-11-16 12:22:02,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2022-11-16 12:22:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:22:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:22:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:22:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:22:02,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:22:02,974 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:22:03,111 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:22:03,113 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:22:03,321 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:22:03,328 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:22:03,328 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:22:03,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:22:03 BoogieIcfgContainer [2022-11-16 12:22:03,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:22:03,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:22:03,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:22:03,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:22:03,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:22:01" (1/3) ... [2022-11-16 12:22:03,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69546a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:22:03, skipping insertion in model container [2022-11-16 12:22:03,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:22:02" (2/3) ... [2022-11-16 12:22:03,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69546a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:22:03, skipping insertion in model container [2022-11-16 12:22:03,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:22:03" (3/3) ... [2022-11-16 12:22:03,340 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-3.i [2022-11-16 12:22:03,349 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:22:03,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:22:03,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:22:03,361 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:22:03,430 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 12:22:03,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 100 transitions, 208 flow [2022-11-16 12:22:03,541 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-16 12:22:03,541 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:22:03,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 99 events. 7/99 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-11-16 12:22:03,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 100 transitions, 208 flow [2022-11-16 12:22:03,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 87 transitions, 180 flow [2022-11-16 12:22:03,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:22:03,571 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;@30453129, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:22:03,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:22:03,618 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2022-11-16 12:22:03,624 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:22:03,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:03,625 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:03,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:22:03,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash -985366931, now seen corresponding path program 1 times [2022-11-16 12:22:03,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:03,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616524935] [2022-11-16 12:22:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:03,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:03,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616524935] [2022-11-16 12:22:03,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616524935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:22:03,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:22:03,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:22:03,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290794662] [2022-11-16 12:22:03,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:22:03,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:22:03,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:04,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:22:04,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:22:04,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 100 [2022-11-16 12:22:04,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 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) [2022-11-16 12:22:04,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:22:04,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 100 [2022-11-16 12:22:04,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:22:04,118 INFO L130 PetriNetUnfolder]: 2/81 cut-off events. [2022-11-16 12:22:04,122 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:22:04,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 81 events. 2/81 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 4/82 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2022-11-16 12:22:04,126 INFO L137 encePairwiseOnDemand]: 96/100 looper letters, 2 selfloop transitions, 0 changer transitions 0/81 dead transitions. [2022-11-16 12:22:04,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 172 flow [2022-11-16 12:22:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:22:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:22:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 186 transitions. [2022-11-16 12:22:04,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.93 [2022-11-16 12:22:04,142 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 186 transitions. [2022-11-16 12:22:04,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 186 transitions. [2022-11-16 12:22:04,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:22:04,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 186 transitions. [2022-11-16 12:22:04,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.0) internal successors, (186), 2 states have internal predecessors, (186), 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) [2022-11-16 12:22:04,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2022-11-16 12:22:04,162 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2022-11-16 12:22:04,163 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 180 flow. Second operand 2 states and 186 transitions. [2022-11-16 12:22:04,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 172 flow [2022-11-16 12:22:04,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:22:04,169 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 164 flow [2022-11-16 12:22:04,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=164, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2022-11-16 12:22:04,175 INFO L288 CegarLoopForPetriNet]: 85 programPoint places, -3 predicate places. [2022-11-16 12:22:04,175 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 164 flow [2022-11-16 12:22:04,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 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) [2022-11-16 12:22:04,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:04,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:04,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:22:04,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:22:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:04,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1853356565, now seen corresponding path program 1 times [2022-11-16 12:22:04,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:04,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061805191] [2022-11-16 12:22:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:04,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:04,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:04,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061805191] [2022-11-16 12:22:04,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061805191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:22:04,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:22:04,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:22:04,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422283346] [2022-11-16 12:22:04,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:22:04,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:22:04,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:22:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:22:04,444 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 100 [2022-11-16 12:22:04,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2022-11-16 12:22:04,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:22:04,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 100 [2022-11-16 12:22:04,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:22:04,497 INFO L130 PetriNetUnfolder]: 2/85 cut-off events. [2022-11-16 12:22:04,497 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:22:04,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 85 events. 2/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 98. Up to 10 conditions per place. [2022-11-16 12:22:04,499 INFO L137 encePairwiseOnDemand]: 97/100 looper letters, 10 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-11-16 12:22:04,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 194 flow [2022-11-16 12:22:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:22:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:22:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2022-11-16 12:22:04,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2022-11-16 12:22:04,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2022-11-16 12:22:04,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2022-11-16 12:22:04,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:22:04,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2022-11-16 12:22:04,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2022-11-16 12:22:04,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2022-11-16 12:22:04,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2022-11-16 12:22:04,506 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 164 flow. Second operand 3 states and 262 transitions. [2022-11-16 12:22:04,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 194 flow [2022-11-16 12:22:04,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:22:04,508 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 176 flow [2022-11-16 12:22:04,509 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2022-11-16 12:22:04,509 INFO L288 CegarLoopForPetriNet]: 85 programPoint places, 0 predicate places. [2022-11-16 12:22:04,510 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 176 flow [2022-11-16 12:22:04,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2022-11-16 12:22:04,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:04,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:04,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:22:04,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:22:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash 304267904, now seen corresponding path program 1 times [2022-11-16 12:22:04,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:04,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919915965] [2022-11-16 12:22:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:04,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:22:04,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:04,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919915965] [2022-11-16 12:22:04,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919915965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:04,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434049] [2022-11-16 12:22:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:04,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:04,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:04,709 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:04,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:22:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:22:04,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:22:04,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:22:04,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:22:04,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:22:04,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 12:22:04,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306074197] [2022-11-16 12:22:04,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:22:04,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:22:04,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:04,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:22:04,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:22:04,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 100 [2022-11-16 12:22:04,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2022-11-16 12:22:04,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:22:04,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 100 [2022-11-16 12:22:04,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:22:05,000 INFO L130 PetriNetUnfolder]: 2/92 cut-off events. [2022-11-16 12:22:05,001 INFO L131 PetriNetUnfolder]: For 2/9 co-relation queries the response was YES. [2022-11-16 12:22:05,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 92 events. 2/92 cut-off events. For 2/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 109. Up to 9 conditions per place. [2022-11-16 12:22:05,003 INFO L137 encePairwiseOnDemand]: 97/100 looper letters, 9 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-11-16 12:22:05,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 204 flow [2022-11-16 12:22:05,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:22:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:22:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2022-11-16 12:22:05,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.88 [2022-11-16 12:22:05,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2022-11-16 12:22:05,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2022-11-16 12:22:05,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:22:05,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2022-11-16 12:22:05,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2022-11-16 12:22:05,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2022-11-16 12:22:05,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2022-11-16 12:22:05,017 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 176 flow. Second operand 3 states and 264 transitions. [2022-11-16 12:22:05,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 204 flow [2022-11-16 12:22:05,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 85 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:22:05,022 INFO L231 Difference]: Finished difference. Result has 87 places, 83 transitions, 186 flow [2022-11-16 12:22:05,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2022-11-16 12:22:05,025 INFO L288 CegarLoopForPetriNet]: 85 programPoint places, 2 predicate places. [2022-11-16 12:22:05,026 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 186 flow [2022-11-16 12:22:05,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2022-11-16 12:22:05,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:05,027 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:05,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:05,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:05,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:22:05,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:05,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2020894135, now seen corresponding path program 1 times [2022-11-16 12:22:05,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:05,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838286618] [2022-11-16 12:22:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:05,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:22:05,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:05,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838286618] [2022-11-16 12:22:05,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838286618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:05,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138396580] [2022-11-16 12:22:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:05,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:05,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:05,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:05,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:22:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:05,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:22:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:22:05,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:22:05,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138396580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:05,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:05,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:22:05,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297348628] [2022-11-16 12:22:05,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:05,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:22:05,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:05,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:22:05,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:22:05,724 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 100 [2022-11-16 12:22:05,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 186 flow. Second operand has 10 states, 10 states have (on average 84.9) internal successors, (849), 10 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) [2022-11-16 12:22:05,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:22:05,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 100 [2022-11-16 12:22:05,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:22:05,836 INFO L130 PetriNetUnfolder]: 2/102 cut-off events. [2022-11-16 12:22:05,837 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:22:05,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 102 events. 2/102 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 131. Up to 7 conditions per place. [2022-11-16 12:22:05,843 INFO L137 encePairwiseOnDemand]: 94/100 looper letters, 9 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2022-11-16 12:22:05,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 240 flow [2022-11-16 12:22:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:22:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:22:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 767 transitions. [2022-11-16 12:22:05,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8522222222222222 [2022-11-16 12:22:05,846 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 767 transitions. [2022-11-16 12:22:05,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 767 transitions. [2022-11-16 12:22:05,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:22:05,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 767 transitions. [2022-11-16 12:22:05,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 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) [2022-11-16 12:22:05,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2022-11-16 12:22:05,853 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2022-11-16 12:22:05,854 INFO L175 Difference]: Start difference. First operand has 87 places, 83 transitions, 186 flow. Second operand 9 states and 767 transitions. [2022-11-16 12:22:05,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 240 flow [2022-11-16 12:22:05,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:22:05,858 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 234 flow [2022-11-16 12:22:05,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2022-11-16 12:22:05,860 INFO L288 CegarLoopForPetriNet]: 85 programPoint places, 12 predicate places. [2022-11-16 12:22:05,860 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 234 flow [2022-11-16 12:22:05,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.9) internal successors, (849), 10 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) [2022-11-16 12:22:05,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:05,861 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:05,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:06,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:06,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:22:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:06,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1756645101, now seen corresponding path program 2 times [2022-11-16 12:22:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:06,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827501725] [2022-11-16 12:22:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:06,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:22:06,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:06,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827501725] [2022-11-16 12:22:06,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827501725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:06,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681791447] [2022-11-16 12:22:06,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:22:06,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:06,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:06,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:06,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:22:06,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:22:06,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:22:06,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:22:06,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:22:06,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:22:06,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681791447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:06,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:06,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:22:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554038718] [2022-11-16 12:22:06,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:06,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:22:06,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:06,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:22:06,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:22:06,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 100 [2022-11-16 12:22:06,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 234 flow. Second operand has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:06,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:22:06,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 100 [2022-11-16 12:22:06,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:22:06,607 INFO L130 PetriNetUnfolder]: 2/109 cut-off events. [2022-11-16 12:22:06,608 INFO L131 PetriNetUnfolder]: For 7/21 co-relation queries the response was YES. [2022-11-16 12:22:06,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 109 events. 2/109 cut-off events. For 7/21 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2022-11-16 12:22:06,609 INFO L137 encePairwiseOnDemand]: 94/100 looper letters, 10 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2022-11-16 12:22:06,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 97 transitions, 290 flow [2022-11-16 12:22:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:22:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:22:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 759 transitions. [2022-11-16 12:22:06,612 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8433333333333334 [2022-11-16 12:22:06,612 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 759 transitions. [2022-11-16 12:22:06,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 759 transitions. [2022-11-16 12:22:06,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:22:06,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 759 transitions. [2022-11-16 12:22:06,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.33333333333333) internal successors, (759), 9 states have internal predecessors, (759), 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) [2022-11-16 12:22:06,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2022-11-16 12:22:06,618 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2022-11-16 12:22:06,618 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 234 flow. Second operand 9 states and 759 transitions. [2022-11-16 12:22:06,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 97 transitions, 290 flow [2022-11-16 12:22:06,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 97 transitions, 284 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-16 12:22:06,626 INFO L231 Difference]: Finished difference. Result has 107 places, 95 transitions, 278 flow [2022-11-16 12:22:06,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=278, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2022-11-16 12:22:06,628 INFO L288 CegarLoopForPetriNet]: 85 programPoint places, 22 predicate places. [2022-11-16 12:22:06,629 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 278 flow [2022-11-16 12:22:06,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:22:06,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:06,630 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:06,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:22:06,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:06,835 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:22:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash 208419167, now seen corresponding path program 3 times [2022-11-16 12:22:06,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:06,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62882867] [2022-11-16 12:22:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:22:07,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:07,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62882867] [2022-11-16 12:22:07,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62882867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:07,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669563692] [2022-11-16 12:22:07,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:22:07,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:07,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:07,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:22:07,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:22:07,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:22:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:22:07,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:22:07,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:22:07,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669563692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:07,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:07,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-16 12:22:07,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786856660] [2022-11-16 12:22:07,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:07,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:22:07,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:07,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:22:07,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:22:07,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 100 [2022-11-16 12:22:07,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 278 flow. Second operand has 23 states, 23 states have (on average 77.6086956521739) internal successors, (1785), 23 states have internal predecessors, (1785), 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) [2022-11-16 12:22:07,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:22:07,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 100 [2022-11-16 12:22:07,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:22:13,853 INFO L130 PetriNetUnfolder]: 673/1895 cut-off events. [2022-11-16 12:22:13,853 INFO L131 PetriNetUnfolder]: For 2216/2216 co-relation queries the response was YES. [2022-11-16 12:22:13,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5373 conditions, 1895 events. 673/1895 cut-off events. For 2216/2216 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 10480 event pairs, 20 based on Foata normal form. 116/2008 useless extension candidates. Maximal degree in co-relation 5362. Up to 231 conditions per place. [2022-11-16 12:22:13,898 INFO L137 encePairwiseOnDemand]: 89/100 looper letters, 325 selfloop transitions, 451 changer transitions 0/840 dead transitions. [2022-11-16 12:22:13,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 840 transitions, 5686 flow [2022-11-16 12:22:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2022-11-16 12:22:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2022-11-16 12:22:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 17415 transitions. [2022-11-16 12:22:13,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7880090497737556 [2022-11-16 12:22:13,942 INFO L72 ComplementDD]: Start complementDD. Operand 221 states and 17415 transitions. [2022-11-16 12:22:13,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 17415 transitions. [2022-11-16 12:22:13,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:22:13,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 221 states and 17415 transitions. [2022-11-16 12:22:13,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 222 states, 221 states have (on average 78.80090497737557) internal successors, (17415), 221 states have internal predecessors, (17415), 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) [2022-11-16 12:22:14,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 222 states, 222 states have (on average 100.0) internal successors, (22200), 222 states have internal predecessors, (22200), 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) [2022-11-16 12:22:14,059 INFO L81 ComplementDD]: Finished complementDD. Result has 222 states, 222 states have (on average 100.0) internal successors, (22200), 222 states have internal predecessors, (22200), 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) [2022-11-16 12:22:14,066 INFO L175 Difference]: Start difference. First operand has 107 places, 95 transitions, 278 flow. Second operand 221 states and 17415 transitions. [2022-11-16 12:22:14,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 840 transitions, 5686 flow [2022-11-16 12:22:14,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 840 transitions, 5486 flow, removed 80 selfloop flow, removed 1 redundant places. [2022-11-16 12:22:14,098 INFO L231 Difference]: Finished difference. Result has 426 places, 570 transitions, 4232 flow [2022-11-16 12:22:14,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=221, PETRI_FLOW=4232, PETRI_PLACES=426, PETRI_TRANSITIONS=570} [2022-11-16 12:22:14,099 INFO L288 CegarLoopForPetriNet]: 85 programPoint places, 341 predicate places. [2022-11-16 12:22:14,099 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 570 transitions, 4232 flow [2022-11-16 12:22:14,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.6086956521739) internal successors, (1785), 23 states have internal predecessors, (1785), 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) [2022-11-16 12:22:14,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:14,101 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:14,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:14,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:14,309 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:22:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:14,309 INFO L85 PathProgramCache]: Analyzing trace with hash 102438394, now seen corresponding path program 4 times [2022-11-16 12:22:14,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:14,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479036668] [2022-11-16 12:22:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:14,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-16 12:22:14,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:14,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479036668] [2022-11-16 12:22:14,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479036668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:14,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370396660] [2022-11-16 12:22:14,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:22:14,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:14,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:14,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:14,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:22:14,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:22:14,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:22:14,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:22:14,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-16 12:22:14,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-16 12:22:15,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370396660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:15,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:15,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-11-16 12:22:15,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752688083] [2022-11-16 12:22:15,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:15,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:22:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:22:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:22:15,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 100 [2022-11-16 12:22:15,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 570 transitions, 4232 flow. Second operand has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 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) [2022-11-16 12:22:15,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:22:15,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 100 [2022-11-16 12:22:15,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:22:16,147 INFO L130 PetriNetUnfolder]: 471/1636 cut-off events. [2022-11-16 12:22:16,147 INFO L131 PetriNetUnfolder]: For 64323/65247 co-relation queries the response was YES. [2022-11-16 12:22:16,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1636 events. 471/1636 cut-off events. For 64323/65247 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 10166 event pairs, 75 based on Foata normal form. 231/1802 useless extension candidates. Maximal degree in co-relation 9365. Up to 259 conditions per place. [2022-11-16 12:22:16,181 INFO L137 encePairwiseOnDemand]: 94/100 looper letters, 16 selfloop transitions, 331 changer transitions 0/668 dead transitions. [2022-11-16 12:22:16,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 668 transitions, 6050 flow [2022-11-16 12:22:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:22:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 12:22:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2262 transitions. [2022-11-16 12:22:16,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8377777777777777 [2022-11-16 12:22:16,196 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2262 transitions. [2022-11-16 12:22:16,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2262 transitions. [2022-11-16 12:22:16,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:22:16,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2262 transitions. [2022-11-16 12:22:16,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 83.77777777777777) internal successors, (2262), 27 states have internal predecessors, (2262), 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) [2022-11-16 12:22:16,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 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) [2022-11-16 12:22:16,220 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 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) [2022-11-16 12:22:16,220 INFO L175 Difference]: Start difference. First operand has 426 places, 570 transitions, 4232 flow. Second operand 27 states and 2262 transitions. [2022-11-16 12:22:16,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 668 transitions, 6050 flow [2022-11-16 12:22:16,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 668 transitions, 5466 flow, removed 106 selfloop flow, removed 12 redundant places. [2022-11-16 12:22:16,658 INFO L231 Difference]: Finished difference. Result has 446 places, 661 transitions, 5483 flow [2022-11-16 12:22:16,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5483, PETRI_PLACES=446, PETRI_TRANSITIONS=661} [2022-11-16 12:22:16,660 INFO L288 CegarLoopForPetriNet]: 85 programPoint places, 361 predicate places. [2022-11-16 12:22:16,660 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 661 transitions, 5483 flow [2022-11-16 12:22:16,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 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) [2022-11-16 12:22:16,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:16,661 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:16,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:16,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:22:16,867 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:22:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1691343597, now seen corresponding path program 5 times [2022-11-16 12:22:16,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:16,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108047180] [2022-11-16 12:22:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 124 proven. 175 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 12:22:17,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108047180] [2022-11-16 12:22:17,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108047180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708910567] [2022-11-16 12:22:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:22:17,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:17,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:17,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:17,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:22:17,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-16 12:22:17,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:22:17,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:22:17,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 124 proven. 175 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 12:22:17,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 124 proven. 175 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 12:22:17,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708910567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:17,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:17,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 12:22:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316017578] [2022-11-16 12:22:17,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:17,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:22:17,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:22:17,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:22:17,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 100 [2022-11-16 12:22:17,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 661 transitions, 5483 flow. Second operand has 34 states, 34 states have (on average 84.97058823529412) internal successors, (2889), 34 states have internal predecessors, (2889), 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) [2022-11-16 12:22:17,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:22:17,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 100 [2022-11-16 12:22:17,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:22:20,044 INFO L130 PetriNetUnfolder]: 983/3393 cut-off events. [2022-11-16 12:22:20,045 INFO L131 PetriNetUnfolder]: For 239179/240672 co-relation queries the response was YES. [2022-11-16 12:22:20,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16011 conditions, 3393 events. 983/3393 cut-off events. For 239179/240672 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 23712 event pairs, 155 based on Foata normal form. 90/3414 useless extension candidates. Maximal degree in co-relation 15894. Up to 524 conditions per place. [2022-11-16 12:22:20,102 INFO L137 encePairwiseOnDemand]: 94/100 looper letters, 121 selfloop transitions, 495 changer transitions 0/1018 dead transitions. [2022-11-16 12:22:20,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 1018 transitions, 9447 flow [2022-11-16 12:22:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 12:22:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-16 12:22:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3809 transitions. [2022-11-16 12:22:20,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8464444444444444 [2022-11-16 12:22:20,108 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3809 transitions. [2022-11-16 12:22:20,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3809 transitions. [2022-11-16 12:22:20,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:22:20,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3809 transitions. [2022-11-16 12:22:20,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 84.64444444444445) internal successors, (3809), 45 states have internal predecessors, (3809), 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) [2022-11-16 12:22:20,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 100.0) internal successors, (4600), 46 states have internal predecessors, (4600), 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) [2022-11-16 12:22:20,124 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 100.0) internal successors, (4600), 46 states have internal predecessors, (4600), 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) [2022-11-16 12:22:20,124 INFO L175 Difference]: Start difference. First operand has 446 places, 661 transitions, 5483 flow. Second operand 45 states and 3809 transitions. [2022-11-16 12:22:20,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 1018 transitions, 9447 flow [2022-11-16 12:22:20,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1018 transitions, 8595 flow, removed 186 selfloop flow, removed 39 redundant places. [2022-11-16 12:22:20,664 INFO L231 Difference]: Finished difference. Result has 460 places, 936 transitions, 7793 flow [2022-11-16 12:22:20,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4631, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=7793, PETRI_PLACES=460, PETRI_TRANSITIONS=936} [2022-11-16 12:22:20,666 INFO L288 CegarLoopForPetriNet]: 85 programPoint places, 375 predicate places. [2022-11-16 12:22:20,666 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 936 transitions, 7793 flow [2022-11-16 12:22:20,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 84.97058823529412) internal successors, (2889), 34 states have internal predecessors, (2889), 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) [2022-11-16 12:22:20,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:22:20,667 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:20,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:20,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:20,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:22:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1783472607, now seen corresponding path program 6 times [2022-11-16 12:22:20,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:20,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004784480] [2022-11-16 12:22:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 124 proven. 855 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 12:22:22,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:22,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004784480] [2022-11-16 12:22:22,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004784480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:22,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979913821] [2022-11-16 12:22:22,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:22:22,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:22,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:22,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:22,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:22:22,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-11-16 12:22:22,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:22:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:22:22,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-11-16 12:22:23,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-11-16 12:22:24,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979913821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:24,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:24,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21, 21] total 71 [2022-11-16 12:22:24,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046103781] [2022-11-16 12:22:24,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:24,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-16 12:22:24,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:24,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-16 12:22:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=4263, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 12:22:24,213 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 100 [2022-11-16 12:22:24,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 936 transitions, 7793 flow. Second operand has 71 states, 71 states have (on average 77.40845070422536) internal successors, (5496), 71 states have internal predecessors, (5496), 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) [2022-11-16 12:22:24,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:22:24,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 100 [2022-11-16 12:22:24,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:31:10,982 INFO L130 PetriNetUnfolder]: 5531/14147 cut-off events. [2022-11-16 12:31:10,982 INFO L131 PetriNetUnfolder]: For 641514/641572 co-relation queries the response was YES. [2022-11-16 12:31:11,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80505 conditions, 14147 events. 5531/14147 cut-off events. For 641514/641572 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 105201 event pairs, 32 based on Foata normal form. 802/14931 useless extension candidates. Maximal degree in co-relation 80409. Up to 2380 conditions per place. [2022-11-16 12:31:11,233 INFO L137 encePairwiseOnDemand]: 89/100 looper letters, 2326 selfloop transitions, 5571 changer transitions 0/7961 dead transitions. [2022-11-16 12:31:11,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 3092 places, 7961 transitions, 109850 flow [2022-11-16 12:31:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2633 states. [2022-11-16 12:31:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2633 states. [2022-11-16 12:31:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 205638 transitions. [2022-11-16 12:31:11,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7810026585643752 [2022-11-16 12:31:11,473 INFO L72 ComplementDD]: Start complementDD. Operand 2633 states and 205638 transitions. [2022-11-16 12:31:11,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2633 states and 205638 transitions. [2022-11-16 12:31:11,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:31:11,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2633 states and 205638 transitions. [2022-11-16 12:31:12,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 2634 states, 2633 states have (on average 78.10026585643752) internal successors, (205638), 2633 states have internal predecessors, (205638), 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) [2022-11-16 12:31:12,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 2634 states, 2634 states have (on average 100.0) internal successors, (263400), 2634 states have internal predecessors, (263400), 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) [2022-11-16 12:31:13,013 INFO L81 ComplementDD]: Finished complementDD. Result has 2634 states, 2634 states have (on average 100.0) internal successors, (263400), 2634 states have internal predecessors, (263400), 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) [2022-11-16 12:31:13,013 INFO L175 Difference]: Start difference. First operand has 460 places, 936 transitions, 7793 flow. Second operand 2633 states and 205638 transitions. [2022-11-16 12:31:13,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 3092 places, 7961 transitions, 109850 flow [2022-11-16 12:31:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 3074 places, 7961 transitions, 107834 flow, removed 0 selfloop flow, removed 18 redundant places. [2022-11-16 12:31:14,423 INFO L231 Difference]: Finished difference. Result has 3726 places, 5841 transitions, 76598 flow [2022-11-16 12:31:14,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=7397, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2633, PETRI_FLOW=76598, PETRI_PLACES=3726, PETRI_TRANSITIONS=5841} [2022-11-16 12:31:14,426 INFO L288 CegarLoopForPetriNet]: 85 programPoint places, 3641 predicate places. [2022-11-16 12:31:14,426 INFO L495 AbstractCegarLoop]: Abstraction has has 3726 places, 5841 transitions, 76598 flow [2022-11-16 12:31:14,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 77.40845070422536) internal successors, (5496), 71 states have internal predecessors, (5496), 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) [2022-11-16 12:31:14,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:31:14,427 INFO L209 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:14,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:31:14,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:14,634 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:31:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:14,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1559396916, now seen corresponding path program 7 times [2022-11-16 12:31:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:31:14,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462609578] [2022-11-16 12:31:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:14,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:31:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 31 proven. 874 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-11-16 12:31:16,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:31:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462609578] [2022-11-16 12:31:16,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462609578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:31:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581317126] [2022-11-16 12:31:16,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:31:16,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:16,199 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:31:16,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c3b7eef-54fb-4653-8cdc-251824bcc2f9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:31:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 12:31:16,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 31 proven. 874 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-11-16 12:31:16,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:31:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 31 proven. 874 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-11-16 12:31:17,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581317126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:17,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:31:17,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2022-11-16 12:31:17,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027593838] [2022-11-16 12:31:17,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:17,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 12:31:17,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:31:17,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 12:31:17,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:31:17,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 100 [2022-11-16 12:31:17,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 3726 places, 5841 transitions, 76598 flow. Second operand has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 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) [2022-11-16 12:31:17,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:31:17,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 100 [2022-11-16 12:31:17,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand