./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/indexer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/indexer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ --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 f24afaadf07ead7c7da85cf6020fd6a6a5b5585e439441b5111a2dea2e7cec4c --- 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-dbf71c6-m [2022-10-17 10:14:43,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:14:43,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:14:43,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:14:43,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:14:43,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:14:43,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:14:43,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:14:43,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:14:43,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:14:43,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:14:43,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:14:43,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:14:43,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:14:43,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:14:43,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:14:43,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:14:43,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:14:43,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:14:43,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:14:43,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:14:43,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:14:43,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:14:43,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:14:43,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:14:43,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:14:43,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:14:43,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:14:43,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:14:43,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:14:43,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:14:43,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:14:43,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:14:43,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:14:43,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:14:43,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:14:43,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:14:43,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:14:43,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:14:43,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:14:43,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:14:43,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:14:43,711 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:14:43,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:14:43,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:14:43,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:14:43,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:14:43,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:14:43,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:14:43,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:14:43,717 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:14:43,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:14:43,717 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:14:43,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:14:43,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:14:43,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:14:43,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:14:43,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:14:43,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:14:43,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:14:43,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:14:43,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:14:43,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:14:43,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:14:43,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:14:43,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:14:43,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:14:43,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:14:43,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:14:43,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:14:43,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:14:43,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:14:43,723 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:14:43,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:14:43,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:14:43,724 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_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24afaadf07ead7c7da85cf6020fd6a6a5b5585e439441b5111a2dea2e7cec4c [2022-10-17 10:14:44,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:14:44,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:14:44,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:14:44,109 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:14:44,109 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:14:44,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread/indexer.i [2022-10-17 10:14:44,187 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/data/3bee21952/9c081cd650664648865e341d6bead5c9/FLAG57db8f036 [2022-10-17 10:14:44,827 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:14:44,828 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/sv-benchmarks/c/pthread/indexer.i [2022-10-17 10:14:44,850 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/data/3bee21952/9c081cd650664648865e341d6bead5c9/FLAG57db8f036 [2022-10-17 10:14:45,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/data/3bee21952/9c081cd650664648865e341d6bead5c9 [2022-10-17 10:14:45,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:14:45,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:14:45,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:14:45,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:14:45,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:14:45,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:45,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d0bdf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45, skipping insertion in model container [2022-10-17 10:14:45,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:45,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:14:45,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:14:45,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/sv-benchmarks/c/pthread/indexer.i[47556,47569] [2022-10-17 10:14:45,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:14:45,786 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:14:45,844 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/sv-benchmarks/c/pthread/indexer.i[47556,47569] [2022-10-17 10:14:45,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:14:45,923 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:14:45,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45 WrapperNode [2022-10-17 10:14:45,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:14:45,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:14:45,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:14:45,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:14:45,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:45,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:45,995 INFO L138 Inliner]: procedures = 269, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2022-10-17 10:14:45,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:14:45,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:14:45,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:14:45,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:14:46,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:46,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:46,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:46,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:46,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:46,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:46,023 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:46,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:46,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:14:46,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:14:46,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:14:46,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:14:46,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (1/1) ... [2022-10-17 10:14:46,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:14:46,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:14:46,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:14:46,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:14:46,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:14:46,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:14:46,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:14:46,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2022-10-17 10:14:46,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2022-10-17 10:14:46,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:14:46,137 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-10-17 10:14:46,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:14:46,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:14:46,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:14:46,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:14:46,140 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:14:46,348 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:14:46,361 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:14:46,632 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:14:46,641 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:14:46,641 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-17 10:14:46,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:14:46 BoogieIcfgContainer [2022-10-17 10:14:46,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:14:46,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:14:46,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:14:46,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:14:46,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:14:45" (1/3) ... [2022-10-17 10:14:46,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37447dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:14:46, skipping insertion in model container [2022-10-17 10:14:46,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:45" (2/3) ... [2022-10-17 10:14:46,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37447dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:14:46, skipping insertion in model container [2022-10-17 10:14:46,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:14:46" (3/3) ... [2022-10-17 10:14:46,679 INFO L112 eAbstractionObserver]: Analyzing ICFG indexer.i [2022-10-17 10:14:46,690 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:14:46,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:14:46,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:14:46,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:14:46,793 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-10-17 10:14:46,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 252 flow [2022-10-17 10:14:46,895 INFO L130 PetriNetUnfolder]: 18/146 cut-off events. [2022-10-17 10:14:46,895 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:14:46,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 146 events. 18/146 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 229 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-10-17 10:14:46,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 122 transitions, 252 flow [2022-10-17 10:14:46,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 117 transitions, 239 flow [2022-10-17 10:14:46,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:14:46,923 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;@27856830, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:14:46,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:14:46,947 INFO L130 PetriNetUnfolder]: 11/93 cut-off events. [2022-10-17 10:14:46,947 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:14:46,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:14:46,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:46,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:14:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1129507411, now seen corresponding path program 1 times [2022-10-17 10:14:46,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:14:46,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180913310] [2022-10-17 10:14:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:14:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:14:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180913310] [2022-10-17 10:14:47,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180913310] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:14:47,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:14:47,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:14:47,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638521269] [2022-10-17 10:14:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:14:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:14:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:14:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:14:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:14:47,456 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 122 [2022-10-17 10:14:47,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2022-10-17 10:14:47,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:14:47,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 122 [2022-10-17 10:14:47,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:14:47,544 INFO L130 PetriNetUnfolder]: 4/105 cut-off events. [2022-10-17 10:14:47,544 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:14:47,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 105 events. 4/105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 72. Up to 14 conditions per place. [2022-10-17 10:14:47,547 INFO L137 encePairwiseOnDemand]: 107/122 looper letters, 21 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2022-10-17 10:14:47,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 103 transitions, 263 flow [2022-10-17 10:14:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:14:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:14:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2022-10-17 10:14:47,563 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8114754098360656 [2022-10-17 10:14:47,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2022-10-17 10:14:47,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2022-10-17 10:14:47,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:14:47,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2022-10-17 10:14:47,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2022-10-17 10:14:47,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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) [2022-10-17 10:14:47,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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) [2022-10-17 10:14:47,582 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 239 flow. Second operand 3 states and 297 transitions. [2022-10-17 10:14:47,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 103 transitions, 263 flow [2022-10-17 10:14:47,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 103 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:14:47,591 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 220 flow [2022-10-17 10:14:47,593 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2022-10-17 10:14:47,597 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, -9 predicate places. [2022-10-17 10:14:47,597 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 220 flow [2022-10-17 10:14:47,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2022-10-17 10:14:47,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:14:47,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:47,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:14:47,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:14:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1175273194, now seen corresponding path program 1 times [2022-10-17 10:14:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:14:47,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136109629] [2022-10-17 10:14:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:14:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:47,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:14:47,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136109629] [2022-10-17 10:14:47,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136109629] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:14:47,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277661845] [2022-10-17 10:14:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:47,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:14:47,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:14:47,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:14:48,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:14:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:48,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:14:48,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:48,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:14:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:48,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277661845] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:14:48,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:14:48,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:14:48,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603391787] [2022-10-17 10:14:48,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:14:48,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:14:48,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:14:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:14:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:14:48,267 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-10-17 10:14:48,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 86.8) internal successors, (868), 10 states have internal predecessors, (868), 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) [2022-10-17 10:14:48,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:14:48,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-10-17 10:14:48,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:14:48,411 INFO L130 PetriNetUnfolder]: 4/112 cut-off events. [2022-10-17 10:14:48,411 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-10-17 10:14:48,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 112 events. 4/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 2/110 useless extension candidates. Maximal degree in co-relation 78. Up to 12 conditions per place. [2022-10-17 10:14:48,413 INFO L137 encePairwiseOnDemand]: 112/122 looper letters, 21 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2022-10-17 10:14:48,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 110 transitions, 316 flow [2022-10-17 10:14:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:14:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-10-17 10:14:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 876 transitions. [2022-10-17 10:14:48,420 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7180327868852459 [2022-10-17 10:14:48,420 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 876 transitions. [2022-10-17 10:14:48,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 876 transitions. [2022-10-17 10:14:48,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:14:48,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 876 transitions. [2022-10-17 10:14:48,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.6) internal successors, (876), 10 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:14:48,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 122.0) internal successors, (1342), 11 states have internal predecessors, (1342), 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) [2022-10-17 10:14:48,431 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 122.0) internal successors, (1342), 11 states have internal predecessors, (1342), 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) [2022-10-17 10:14:48,431 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 220 flow. Second operand 10 states and 876 transitions. [2022-10-17 10:14:48,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 110 transitions, 316 flow [2022-10-17 10:14:48,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 110 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:14:48,437 INFO L231 Difference]: Finished difference. Result has 109 places, 104 transitions, 281 flow [2022-10-17 10:14:48,438 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=281, PETRI_PLACES=109, PETRI_TRANSITIONS=104} [2022-10-17 10:14:48,439 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 2 predicate places. [2022-10-17 10:14:48,439 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 104 transitions, 281 flow [2022-10-17 10:14:48,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 86.8) internal successors, (868), 10 states have internal predecessors, (868), 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) [2022-10-17 10:14:48,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:14:48,441 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:48,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:14:48,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-10-17 10:14:48,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:14:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1677055178, now seen corresponding path program 2 times [2022-10-17 10:14:48,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:14:48,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37185602] [2022-10-17 10:14:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:48,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:14:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:48,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:14:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37185602] [2022-10-17 10:14:48,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37185602] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:14:48,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609730429] [2022-10-17 10:14:48,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:14:48,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:14:48,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:14:48,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:14:48,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:14:48,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:14:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:14:48,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:14:48,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:49,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:14:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:49,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609730429] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:14:49,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:14:49,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-10-17 10:14:49,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335615530] [2022-10-17 10:14:49,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:14:49,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:14:49,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:14:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:14:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:14:49,141 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-10-17 10:14:49,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 104 transitions, 281 flow. Second operand has 18 states, 18 states have (on average 86.66666666666667) internal successors, (1560), 18 states have internal predecessors, (1560), 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) [2022-10-17 10:14:49,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:14:49,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-10-17 10:14:49,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:14:49,451 INFO L130 PetriNetUnfolder]: 4/132 cut-off events. [2022-10-17 10:14:49,452 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-10-17 10:14:49,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 132 events. 4/132 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 4/132 useless extension candidates. Maximal degree in co-relation 168. Up to 13 conditions per place. [2022-10-17 10:14:49,456 INFO L137 encePairwiseOnDemand]: 112/122 looper letters, 29 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2022-10-17 10:14:49,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 130 transitions, 501 flow [2022-10-17 10:14:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 10:14:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-10-17 10:14:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1906 transitions. [2022-10-17 10:14:49,464 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.710134128166915 [2022-10-17 10:14:49,465 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1906 transitions. [2022-10-17 10:14:49,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1906 transitions. [2022-10-17 10:14:49,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:14:49,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1906 transitions. [2022-10-17 10:14:49,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.63636363636364) internal successors, (1906), 22 states have internal predecessors, (1906), 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) [2022-10-17 10:14:49,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 122.0) internal successors, (2806), 23 states have internal predecessors, (2806), 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) [2022-10-17 10:14:49,485 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 122.0) internal successors, (2806), 23 states have internal predecessors, (2806), 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) [2022-10-17 10:14:49,485 INFO L175 Difference]: Start difference. First operand has 109 places, 104 transitions, 281 flow. Second operand 22 states and 1906 transitions. [2022-10-17 10:14:49,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 130 transitions, 501 flow [2022-10-17 10:14:49,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 130 transitions, 484 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-10-17 10:14:49,496 INFO L231 Difference]: Finished difference. Result has 134 places, 117 transitions, 414 flow [2022-10-17 10:14:49,496 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=414, PETRI_PLACES=134, PETRI_TRANSITIONS=117} [2022-10-17 10:14:49,499 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 27 predicate places. [2022-10-17 10:14:49,499 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 117 transitions, 414 flow [2022-10-17 10:14:49,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.66666666666667) internal successors, (1560), 18 states have internal predecessors, (1560), 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) [2022-10-17 10:14:49,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:14:49,501 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:49,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:14:49,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:14:49,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:14:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash 894994294, now seen corresponding path program 3 times [2022-10-17 10:14:49,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:14:49,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125828276] [2022-10-17 10:14:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:49,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:14:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:50,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:14:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125828276] [2022-10-17 10:14:50,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125828276] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:14:50,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434522747] [2022-10-17 10:14:50,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:14:50,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:14:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:14:50,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:14:50,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:14:50,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-10-17 10:14:50,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:14:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:14:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:50,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:14:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:50,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434522747] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:14:50,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:14:50,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-10-17 10:14:50,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667597431] [2022-10-17 10:14:50,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:14:50,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-17 10:14:50,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:14:50,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-17 10:14:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-10-17 10:14:50,868 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-10-17 10:14:50,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 117 transitions, 414 flow. Second operand has 34 states, 34 states have (on average 86.58823529411765) internal successors, (2944), 34 states have internal predecessors, (2944), 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) [2022-10-17 10:14:50,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:14:50,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-10-17 10:14:50,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:14:51,616 INFO L130 PetriNetUnfolder]: 4/172 cut-off events. [2022-10-17 10:14:51,617 INFO L131 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2022-10-17 10:14:51,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 172 events. 4/172 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 8/176 useless extension candidates. Maximal degree in co-relation 375. Up to 28 conditions per place. [2022-10-17 10:14:51,619 INFO L137 encePairwiseOnDemand]: 112/122 looper letters, 45 selfloop transitions, 49 changer transitions 0/170 dead transitions. [2022-10-17 10:14:51,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 170 transitions, 922 flow [2022-10-17 10:14:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-10-17 10:14:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-10-17 10:14:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3966 transitions. [2022-10-17 10:14:51,648 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7066999287241625 [2022-10-17 10:14:51,649 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3966 transitions. [2022-10-17 10:14:51,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3966 transitions. [2022-10-17 10:14:51,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:14:51,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3966 transitions. [2022-10-17 10:14:51,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 86.21739130434783) internal successors, (3966), 46 states have internal predecessors, (3966), 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) [2022-10-17 10:14:51,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 122.0) internal successors, (5734), 47 states have internal predecessors, (5734), 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) [2022-10-17 10:14:51,684 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 122.0) internal successors, (5734), 47 states have internal predecessors, (5734), 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) [2022-10-17 10:14:51,685 INFO L175 Difference]: Start difference. First operand has 134 places, 117 transitions, 414 flow. Second operand 46 states and 3966 transitions. [2022-10-17 10:14:51,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 170 transitions, 922 flow [2022-10-17 10:14:51,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 170 transitions, 879 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-10-17 10:14:51,699 INFO L231 Difference]: Finished difference. Result has 182 places, 142 transitions, 701 flow [2022-10-17 10:14:51,700 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=701, PETRI_PLACES=182, PETRI_TRANSITIONS=142} [2022-10-17 10:14:51,702 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 75 predicate places. [2022-10-17 10:14:51,702 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 142 transitions, 701 flow [2022-10-17 10:14:51,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 86.58823529411765) internal successors, (2944), 34 states have internal predecessors, (2944), 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) [2022-10-17 10:14:51,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:14:51,704 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:51,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-17 10:14:51,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:14:51,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:14:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:51,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1528078346, now seen corresponding path program 4 times [2022-10-17 10:14:51,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:14:51,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138419168] [2022-10-17 10:14:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:51,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:14:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:53,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:14:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138419168] [2022-10-17 10:14:53,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138419168] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:14:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870626876] [2022-10-17 10:14:53,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:14:53,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:14:53,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:14:53,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:14:53,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:14:53,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:14:53,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:14:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-17 10:14:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:53,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:14:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:54,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870626876] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:14:54,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:14:54,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-10-17 10:14:54,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226594496] [2022-10-17 10:14:54,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:14:54,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-10-17 10:14:54,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:14:54,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-10-17 10:14:54,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-10-17 10:14:54,428 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-10-17 10:14:54,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 142 transitions, 701 flow. Second operand has 66 states, 66 states have (on average 86.54545454545455) internal successors, (5712), 66 states have internal predecessors, (5712), 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) [2022-10-17 10:14:54,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:14:54,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-10-17 10:14:54,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:14:56,612 INFO L130 PetriNetUnfolder]: 4/252 cut-off events. [2022-10-17 10:14:56,612 INFO L131 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2022-10-17 10:14:56,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 252 events. 4/252 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 16/264 useless extension candidates. Maximal degree in co-relation 861. Up to 58 conditions per place. [2022-10-17 10:14:56,615 INFO L137 encePairwiseOnDemand]: 112/122 looper letters, 77 selfloop transitions, 97 changer transitions 0/250 dead transitions. [2022-10-17 10:14:56,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 250 transitions, 1901 flow [2022-10-17 10:14:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-10-17 10:14:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-10-17 10:14:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 8002 transitions. [2022-10-17 10:14:56,633 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.705270579940067 [2022-10-17 10:14:56,633 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 8002 transitions. [2022-10-17 10:14:56,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 8002 transitions. [2022-10-17 10:14:56,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:14:56,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 8002 transitions. [2022-10-17 10:14:56,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 86.04301075268818) internal successors, (8002), 93 states have internal predecessors, (8002), 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) [2022-10-17 10:14:56,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 122.0) internal successors, (11468), 94 states have internal predecessors, (11468), 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) [2022-10-17 10:14:56,685 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 122.0) internal successors, (11468), 94 states have internal predecessors, (11468), 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) [2022-10-17 10:14:56,685 INFO L175 Difference]: Start difference. First operand has 182 places, 142 transitions, 701 flow. Second operand 93 states and 8002 transitions. [2022-10-17 10:14:56,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 250 transitions, 1901 flow [2022-10-17 10:14:56,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 250 transitions, 1810 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-10-17 10:14:56,702 INFO L231 Difference]: Finished difference. Result has 273 places, 191 transitions, 1344 flow [2022-10-17 10:14:56,703 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=1344, PETRI_PLACES=273, PETRI_TRANSITIONS=191} [2022-10-17 10:14:56,704 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 166 predicate places. [2022-10-17 10:14:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 191 transitions, 1344 flow [2022-10-17 10:14:56,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 86.54545454545455) internal successors, (5712), 66 states have internal predecessors, (5712), 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) [2022-10-17 10:14:56,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:14:56,706 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:56,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:14:56,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:14:56,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:14:56,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:56,923 INFO L85 PathProgramCache]: Analyzing trace with hash 665424118, now seen corresponding path program 5 times [2022-10-17 10:14:56,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:14:56,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483655542] [2022-10-17 10:14:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:56,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:14:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:59,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:14:59,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483655542] [2022-10-17 10:14:59,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483655542] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:14:59,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531337056] [2022-10-17 10:14:59,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:14:59,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:14:59,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:14:59,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:14:59,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:15:06,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-10-17 10:15:06,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:15:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-17 10:15:06,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:15:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:15:06,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:15:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:15:09,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531337056] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:15:09,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:15:09,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-10-17 10:15:09,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224999158] [2022-10-17 10:15:09,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:15:09,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-10-17 10:15:09,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:09,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-10-17 10:15:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-10-17 10:15:09,746 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-10-17 10:15:09,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 191 transitions, 1344 flow. Second operand has 130 states, 130 states have (on average 86.52307692307693) internal successors, (11248), 130 states have internal predecessors, (11248), 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) [2022-10-17 10:15:09,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:09,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-10-17 10:15:09,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:16,224 INFO L130 PetriNetUnfolder]: 4/412 cut-off events. [2022-10-17 10:15:16,224 INFO L131 PetriNetUnfolder]: For 16833/16833 co-relation queries the response was YES. [2022-10-17 10:15:16,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2123 conditions, 412 events. 4/412 cut-off events. For 16833/16833 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 32/440 useless extension candidates. Maximal degree in co-relation 1987. Up to 122 conditions per place. [2022-10-17 10:15:16,230 INFO L137 encePairwiseOnDemand]: 112/122 looper letters, 141 selfloop transitions, 193 changer transitions 0/410 dead transitions. [2022-10-17 10:15:16,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 410 transitions, 4160 flow [2022-10-17 10:15:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-10-17 10:15:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2022-10-17 10:15:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 16242 transitions. [2022-10-17 10:15:16,256 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7043976060369503 [2022-10-17 10:15:16,257 INFO L72 ComplementDD]: Start complementDD. Operand 189 states and 16242 transitions. [2022-10-17 10:15:16,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 189 states and 16242 transitions. [2022-10-17 10:15:16,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:16,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 189 states and 16242 transitions. [2022-10-17 10:15:16,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 190 states, 189 states have (on average 85.93650793650794) internal successors, (16242), 189 states have internal predecessors, (16242), 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) [2022-10-17 10:15:16,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 190 states, 190 states have (on average 122.0) internal successors, (23180), 190 states have internal predecessors, (23180), 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) [2022-10-17 10:15:16,359 INFO L81 ComplementDD]: Finished complementDD. Result has 190 states, 190 states have (on average 122.0) internal successors, (23180), 190 states have internal predecessors, (23180), 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) [2022-10-17 10:15:16,360 INFO L175 Difference]: Start difference. First operand has 273 places, 191 transitions, 1344 flow. Second operand 189 states and 16242 transitions. [2022-10-17 10:15:16,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 410 transitions, 4160 flow [2022-10-17 10:15:16,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 410 transitions, 3972 flow, removed 50 selfloop flow, removed 42 redundant places. [2022-10-17 10:15:16,432 INFO L231 Difference]: Finished difference. Result has 452 places, 288 transitions, 2790 flow [2022-10-17 10:15:16,433 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=189, PETRI_FLOW=2790, PETRI_PLACES=452, PETRI_TRANSITIONS=288} [2022-10-17 10:15:16,436 INFO L287 CegarLoopForPetriNet]: 107 programPoint places, 345 predicate places. [2022-10-17 10:15:16,437 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 288 transitions, 2790 flow [2022-10-17 10:15:16,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 86.52307692307693) internal successors, (11248), 130 states have internal predecessors, (11248), 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) [2022-10-17 10:15:16,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:16,440 INFO L208 CegarLoopForPetriNet]: trace histogram [63, 63, 63, 63, 63, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:15:16,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:15:16,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_996ceee4-3d4d-4ee8-859e-e9f1fd4819a6/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:15:16,666 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:15:16,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash -108530954, now seen corresponding path program 6 times [2022-10-17 10:15:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:16,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811438607] [2022-10-17 10:15:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:16,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat