./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:48:40,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:48:40,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:48:40,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:48:40,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:48:40,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:48:40,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:48:40,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:48:40,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:48:40,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:48:40,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:48:40,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:48:40,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:48:40,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:48:40,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:48:40,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:48:40,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:48:40,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:48:40,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:48:40,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:48:40,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:48:40,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:48:40,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:48:40,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:48:40,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:48:40,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:48:40,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:48:40,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:48:40,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:48:40,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:48:40,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:48:40,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:48:40,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:48:40,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:48:40,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:48:40,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:48:40,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:48:40,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:48:40,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:48:40,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:48:40,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:48:40,577 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:48:40,617 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:48:40,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:48:40,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:48:40,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:48:40,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:48:40,623 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:48:40,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:48:40,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:48:40,624 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:48:40,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:48:40,626 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:48:40,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:48:40,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:48:40,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:48:40,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:48:40,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:48:40,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:48:40,628 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:48:40,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:48:40,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:48:40,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:48:40,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:48:40,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:48:40,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:48:40,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:48:40,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:48:40,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:48:40,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:48:40,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:48:40,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:48:40,632 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:48:40,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:48:40,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:48:40,633 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_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 [2022-11-16 12:48:40,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:48:41,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:48:41,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:48:41,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:48:41,034 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:48:41,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-11-16 12:48:41,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/data/9d1773939/27724603a3f64abfb1f22da49236d155/FLAG661281f3d [2022-11-16 12:48:41,765 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:48:41,766 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-11-16 12:48:41,780 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/data/9d1773939/27724603a3f64abfb1f22da49236d155/FLAG661281f3d [2022-11-16 12:48:42,040 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/data/9d1773939/27724603a3f64abfb1f22da49236d155 [2022-11-16 12:48:42,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:48:42,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:48:42,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:48:42,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:48:42,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:48:42,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df4ccdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42, skipping insertion in model container [2022-11-16 12:48:42,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:48:42,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:48:42,491 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-11-16 12:48:42,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:48:42,523 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:48:42,556 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-11-16 12:48:42,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:48:42,596 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:48:42,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42 WrapperNode [2022-11-16 12:48:42,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:48:42,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:48:42,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:48:42,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:48:42,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,640 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-16 12:48:42,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:48:42,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:48:42,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:48:42,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:48:42,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,688 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:48:42,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:48:42,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:48:42,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:48:42,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (1/1) ... [2022-11-16 12:48:42,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:48:42,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:42,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:48:42,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:48:42,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:48:42,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:48:42,790 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 12:48:42,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:48:42,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:48:42,791 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 12:48:42,791 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 12:48:42,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:48:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:48:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:48:42,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:48:42,794 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:48:42,957 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:48:42,959 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:48:43,234 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:48:43,242 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:48:43,242 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-16 12:48:43,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:48:43 BoogieIcfgContainer [2022-11-16 12:48:43,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:48:43,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:48:43,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:48:43,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:48:43,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:48:42" (1/3) ... [2022-11-16 12:48:43,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df0ec16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:48:43, skipping insertion in model container [2022-11-16 12:48:43,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:42" (2/3) ... [2022-11-16 12:48:43,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df0ec16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:48:43, skipping insertion in model container [2022-11-16 12:48:43,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:48:43" (3/3) ... [2022-11-16 12:48:43,255 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2022-11-16 12:48:43,264 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:48:43,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:48:43,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:48:43,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:48:43,336 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 12:48:43,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2022-11-16 12:48:43,437 INFO L130 PetriNetUnfolder]: 17/149 cut-off events. [2022-11-16 12:48:43,437 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:48:43,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 149 events. 17/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 354 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 72. Up to 6 conditions per place. [2022-11-16 12:48:43,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 236 flow [2022-11-16 12:48:43,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 109 transitions, 223 flow [2022-11-16 12:48:43,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:48:43,466 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:48:43,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:48:43,491 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2022-11-16 12:48:43,491 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:48:43,491 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:43,492 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:43,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:43,498 INFO L85 PathProgramCache]: Analyzing trace with hash -21336812, now seen corresponding path program 1 times [2022-11-16 12:48:43,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861173688] [2022-11-16 12:48:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:43,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:43,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:43,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861173688] [2022-11-16 12:48:43,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861173688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:43,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:43,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:43,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418187477] [2022-11-16 12:48:43,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:43,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:48:43,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:43,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:48:43,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:48:43,879 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 114 [2022-11-16 12:48:43,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 223 flow. Second operand has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:43,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:43,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 114 [2022-11-16 12:48:43,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:43,949 INFO L130 PetriNetUnfolder]: 0/126 cut-off events. [2022-11-16 12:48:43,954 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:48:43,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 126 events. 0/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 195 event pairs, 0 based on Foata normal form. 16/136 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-16 12:48:43,959 INFO L137 encePairwiseOnDemand]: 103/114 looper letters, 1 selfloop transitions, 0 changer transitions 15/97 dead transitions. [2022-11-16 12:48:43,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 97 transitions, 201 flow [2022-11-16 12:48:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:48:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:48:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 212 transitions. [2022-11-16 12:48:43,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9298245614035088 [2022-11-16 12:48:43,971 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 212 transitions. [2022-11-16 12:48:43,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 212 transitions. [2022-11-16 12:48:43,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:43,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 212 transitions. [2022-11-16 12:48:43,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 106.0) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:43,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:43,982 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:43,984 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 223 flow. Second operand 2 states and 212 transitions. [2022-11-16 12:48:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 97 transitions, 201 flow [2022-11-16 12:48:43,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 201 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:43,992 INFO L231 Difference]: Finished difference. Result has 101 places, 82 transitions, 169 flow [2022-11-16 12:48:43,994 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=169, PETRI_PLACES=101, PETRI_TRANSITIONS=82} [2022-11-16 12:48:43,997 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 0 predicate places. [2022-11-16 12:48:43,998 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 82 transitions, 169 flow [2022-11-16 12:48:43,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:43,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:43,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:43,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:48:43,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash -217850317, now seen corresponding path program 1 times [2022-11-16 12:48:44,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:44,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616703637] [2022-11-16 12:48:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:44,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:44,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:44,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616703637] [2022-11-16 12:48:44,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616703637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:44,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:44,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:44,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925212386] [2022-11-16 12:48:44,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:44,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:44,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:44,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:44,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 114 [2022-11-16 12:48:44,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 82 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:44,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 114 [2022-11-16 12:48:44,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:44,197 INFO L130 PetriNetUnfolder]: 0/86 cut-off events. [2022-11-16 12:48:44,197 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:48:44,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 86 events. 0/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-16 12:48:44,198 INFO L137 encePairwiseOnDemand]: 111/114 looper letters, 8 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-11-16 12:48:44,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 193 flow [2022-11-16 12:48:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:48:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2022-11-16 12:48:44,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.847953216374269 [2022-11-16 12:48:44,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2022-11-16 12:48:44,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2022-11-16 12:48:44,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:44,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2022-11-16 12:48:44,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,207 INFO L175 Difference]: Start difference. First operand has 101 places, 82 transitions, 169 flow. Second operand 3 states and 290 transitions. [2022-11-16 12:48:44,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 193 flow [2022-11-16 12:48:44,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:44,210 INFO L231 Difference]: Finished difference. Result has 89 places, 82 transitions, 177 flow [2022-11-16 12:48:44,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2022-11-16 12:48:44,211 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2022-11-16 12:48:44,212 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 177 flow [2022-11-16 12:48:44,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:44,213 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:44,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:48:44,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:44,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:44,214 INFO L85 PathProgramCache]: Analyzing trace with hash 410119783, now seen corresponding path program 1 times [2022-11-16 12:48:44,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:44,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249560790] [2022-11-16 12:48:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:44,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:44,250 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:48:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:44,295 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:48:44,296 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:48:44,297 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:48:44,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:48:44,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:48:44,300 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:48:44,303 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:48:44,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:48:44,335 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:48:44,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 148 transitions, 314 flow [2022-11-16 12:48:44,391 INFO L130 PetriNetUnfolder]: 31/243 cut-off events. [2022-11-16 12:48:44,392 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 12:48:44,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 31/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 721 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2022-11-16 12:48:44,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 148 transitions, 314 flow [2022-11-16 12:48:44,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 148 transitions, 314 flow [2022-11-16 12:48:44,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:48:44,411 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:48:44,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:48:44,423 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2022-11-16 12:48:44,427 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:48:44,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:44,428 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:44,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash -991553880, now seen corresponding path program 1 times [2022-11-16 12:48:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327369937] [2022-11-16 12:48:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:44,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:44,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:44,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327369937] [2022-11-16 12:48:44,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327369937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:44,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:44,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:44,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517669979] [2022-11-16 12:48:44,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:44,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:48:44,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:44,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:48:44,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:48:44,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 148 [2022-11-16 12:48:44,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 148 transitions, 314 flow. Second operand has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:44,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 148 [2022-11-16 12:48:44,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:44,568 INFO L130 PetriNetUnfolder]: 3/212 cut-off events. [2022-11-16 12:48:44,569 INFO L131 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-11-16 12:48:44,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 212 events. 3/212 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 525 event pairs, 0 based on Foata normal form. 42/244 useless extension candidates. Maximal degree in co-relation 135. Up to 7 conditions per place. [2022-11-16 12:48:44,573 INFO L137 encePairwiseOnDemand]: 131/148 looper letters, 2 selfloop transitions, 0 changer transitions 21/130 dead transitions. [2022-11-16 12:48:44,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 130 transitions, 286 flow [2022-11-16 12:48:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:48:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:48:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-11-16 12:48:44,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9222972972972973 [2022-11-16 12:48:44,581 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-11-16 12:48:44,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-11-16 12:48:44,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:44,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-11-16 12:48:44,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,584 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,585 INFO L175 Difference]: Start difference. First operand has 134 places, 148 transitions, 314 flow. Second operand 2 states and 273 transitions. [2022-11-16 12:48:44,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 130 transitions, 286 flow [2022-11-16 12:48:44,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 130 transitions, 286 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:44,593 INFO L231 Difference]: Finished difference. Result has 134 places, 109 transitions, 230 flow [2022-11-16 12:48:44,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=134, PETRI_TRANSITIONS=109} [2022-11-16 12:48:44,597 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 0 predicate places. [2022-11-16 12:48:44,598 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 109 transitions, 230 flow [2022-11-16 12:48:44,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:44,599 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:44,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:48:44,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:44,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1188067385, now seen corresponding path program 1 times [2022-11-16 12:48:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:44,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945999269] [2022-11-16 12:48:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:44,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:44,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945999269] [2022-11-16 12:48:44,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945999269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:44,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:44,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:44,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877363583] [2022-11-16 12:48:44,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:44,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:44,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:44,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:44,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 148 [2022-11-16 12:48:44,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 109 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:44,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 148 [2022-11-16 12:48:44,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:44,721 INFO L130 PetriNetUnfolder]: 0/132 cut-off events. [2022-11-16 12:48:44,721 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:48:44,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 132 events. 0/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 191 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-16 12:48:44,722 INFO L137 encePairwiseOnDemand]: 145/148 looper letters, 11 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2022-11-16 12:48:44,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 113 transitions, 264 flow [2022-11-16 12:48:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:48:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2022-11-16 12:48:44,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8355855855855856 [2022-11-16 12:48:44,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2022-11-16 12:48:44,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2022-11-16 12:48:44,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:44,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2022-11-16 12:48:44,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,730 INFO L175 Difference]: Start difference. First operand has 134 places, 109 transitions, 230 flow. Second operand 3 states and 371 transitions. [2022-11-16 12:48:44,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 113 transitions, 264 flow [2022-11-16 12:48:44,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 113 transitions, 262 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:44,734 INFO L231 Difference]: Finished difference. Result has 118 places, 110 transitions, 240 flow [2022-11-16 12:48:44,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=118, PETRI_TRANSITIONS=110} [2022-11-16 12:48:44,735 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, -16 predicate places. [2022-11-16 12:48:44,735 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 110 transitions, 240 flow [2022-11-16 12:48:44,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:44,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:44,736 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:44,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:48:44,737 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash 230296536, now seen corresponding path program 1 times [2022-11-16 12:48:44,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:44,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601630517] [2022-11-16 12:48:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:44,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:44,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601630517] [2022-11-16 12:48:44,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601630517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849556543] [2022-11-16 12:48:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:44,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:44,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:44,882 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:44,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:48:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:45,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:48:45,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:45,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:45,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849556543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:45,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:45,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:48:45,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521212487] [2022-11-16 12:48:45,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:45,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:48:45,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:45,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:48:45,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:48:45,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 148 [2022-11-16 12:48:45,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 110 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:45,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 148 [2022-11-16 12:48:45,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:45,369 INFO L130 PetriNetUnfolder]: 0/112 cut-off events. [2022-11-16 12:48:45,370 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:48:45,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 112 events. 0/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/114 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-16 12:48:45,371 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 9 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2022-11-16 12:48:45,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 262 flow [2022-11-16 12:48:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:48:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1080 transitions. [2022-11-16 12:48:45,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8108108108108109 [2022-11-16 12:48:45,375 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1080 transitions. [2022-11-16 12:48:45,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1080 transitions. [2022-11-16 12:48:45,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:45,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1080 transitions. [2022-11-16 12:48:45,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.0) internal successors, (1080), 9 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,386 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,386 INFO L175 Difference]: Start difference. First operand has 118 places, 110 transitions, 240 flow. Second operand 9 states and 1080 transitions. [2022-11-16 12:48:45,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 262 flow [2022-11-16 12:48:45,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 106 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:48:45,390 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 234 flow [2022-11-16 12:48:45,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2022-11-16 12:48:45,392 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, -19 predicate places. [2022-11-16 12:48:45,392 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 234 flow [2022-11-16 12:48:45,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:45,394 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:45,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:45,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:45,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:45,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1560651383, now seen corresponding path program 1 times [2022-11-16 12:48:45,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:45,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88868910] [2022-11-16 12:48:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:45,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:45,622 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:48:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:45,643 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:48:45,643 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:48:45,643 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:48:45,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:48:45,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:48:45,644 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:48:45,645 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:48:45,645 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:48:45,682 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:48:45,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 182 transitions, 394 flow [2022-11-16 12:48:45,759 INFO L130 PetriNetUnfolder]: 50/370 cut-off events. [2022-11-16 12:48:45,760 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-16 12:48:45,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 370 events. 50/370 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1247 event pairs, 1 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 251. Up to 16 conditions per place. [2022-11-16 12:48:45,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 182 transitions, 394 flow [2022-11-16 12:48:45,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 182 transitions, 394 flow [2022-11-16 12:48:45,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:48:45,781 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:48:45,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:48:45,795 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2022-11-16 12:48:45,802 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:48:45,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:45,803 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:45,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:45,804 INFO L85 PathProgramCache]: Analyzing trace with hash -153255202, now seen corresponding path program 1 times [2022-11-16 12:48:45,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:45,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438639758] [2022-11-16 12:48:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:45,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:45,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:45,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438639758] [2022-11-16 12:48:45,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438639758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:45,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:45,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:45,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408150098] [2022-11-16 12:48:45,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:45,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:48:45,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:48:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:48:45,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 182 [2022-11-16 12:48:45,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 182 transitions, 394 flow. Second operand has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:45,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 182 [2022-11-16 12:48:45,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:45,947 INFO L130 PetriNetUnfolder]: 8/324 cut-off events. [2022-11-16 12:48:45,947 INFO L131 PetriNetUnfolder]: For 51/59 co-relation queries the response was YES. [2022-11-16 12:48:45,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 324 events. 8/324 cut-off events. For 51/59 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1020 event pairs, 1 based on Foata normal form. 104/412 useless extension candidates. Maximal degree in co-relation 226. Up to 16 conditions per place. [2022-11-16 12:48:45,949 INFO L137 encePairwiseOnDemand]: 159/182 looper letters, 3 selfloop transitions, 0 changer transitions 22/158 dead transitions. [2022-11-16 12:48:45,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 158 transitions, 358 flow [2022-11-16 12:48:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:48:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:48:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2022-11-16 12:48:45,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9148351648351648 [2022-11-16 12:48:45,951 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2022-11-16 12:48:45,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2022-11-16 12:48:45,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:45,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2022-11-16 12:48:45,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,955 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,956 INFO L175 Difference]: Start difference. First operand has 163 places, 182 transitions, 394 flow. Second operand 2 states and 333 transitions. [2022-11-16 12:48:45,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 158 transitions, 358 flow [2022-11-16 12:48:45,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 158 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:45,961 INFO L231 Difference]: Finished difference. Result has 163 places, 136 transitions, 293 flow [2022-11-16 12:48:45,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=293, PETRI_PLACES=163, PETRI_TRANSITIONS=136} [2022-11-16 12:48:45,963 INFO L288 CegarLoopForPetriNet]: 163 programPoint places, 0 predicate places. [2022-11-16 12:48:45,963 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 136 transitions, 293 flow [2022-11-16 12:48:45,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:45,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:45,964 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:45,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:48:45,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash -349768707, now seen corresponding path program 1 times [2022-11-16 12:48:45,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:45,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120709455] [2022-11-16 12:48:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:45,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:46,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:46,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120709455] [2022-11-16 12:48:46,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120709455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:46,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:46,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:46,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503893269] [2022-11-16 12:48:46,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:46,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:46,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:46,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 182 [2022-11-16 12:48:46,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 136 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:46,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 182 [2022-11-16 12:48:46,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:46,089 INFO L130 PetriNetUnfolder]: 0/178 cut-off events. [2022-11-16 12:48:46,089 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:48:46,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 178 events. 0/178 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 354 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-16 12:48:46,090 INFO L137 encePairwiseOnDemand]: 179/182 looper letters, 12 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2022-11-16 12:48:46,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 140 transitions, 329 flow [2022-11-16 12:48:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:48:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2022-11-16 12:48:46,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8241758241758241 [2022-11-16 12:48:46,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2022-11-16 12:48:46,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2022-11-16 12:48:46,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:46,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2022-11-16 12:48:46,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,099 INFO L175 Difference]: Start difference. First operand has 163 places, 136 transitions, 293 flow. Second operand 3 states and 450 transitions. [2022-11-16 12:48:46,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 140 transitions, 329 flow [2022-11-16 12:48:46,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 140 transitions, 323 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:46,103 INFO L231 Difference]: Finished difference. Result has 147 places, 137 transitions, 299 flow [2022-11-16 12:48:46,103 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=147, PETRI_TRANSITIONS=137} [2022-11-16 12:48:46,105 INFO L288 CegarLoopForPetriNet]: 163 programPoint places, -16 predicate places. [2022-11-16 12:48:46,105 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 137 transitions, 299 flow [2022-11-16 12:48:46,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:46,106 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:46,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:48:46,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:46,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1482783278, now seen corresponding path program 1 times [2022-11-16 12:48:46,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:46,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010553357] [2022-11-16 12:48:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:46,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:46,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:46,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010553357] [2022-11-16 12:48:46,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010553357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542963385] [2022-11-16 12:48:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:46,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:46,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:46,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:46,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:48:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:48:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:46,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:46,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542963385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:46,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:46,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:48:46,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811921389] [2022-11-16 12:48:46,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:46,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:48:46,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:48:46,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:48:46,444 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 182 [2022-11-16 12:48:46,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 137 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 146.3) internal successors, (1463), 10 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:46,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 182 [2022-11-16 12:48:46,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:46,592 INFO L130 PetriNetUnfolder]: 0/158 cut-off events. [2022-11-16 12:48:46,592 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-16 12:48:46,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 158 events. 0/158 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 238 event pairs, 0 based on Foata normal form. 2/160 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-16 12:48:46,593 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 13 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2022-11-16 12:48:46,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 147 transitions, 365 flow [2022-11-16 12:48:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:48:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1320 transitions. [2022-11-16 12:48:46,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8058608058608059 [2022-11-16 12:48:46,598 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1320 transitions. [2022-11-16 12:48:46,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1320 transitions. [2022-11-16 12:48:46,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:46,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1320 transitions. [2022-11-16 12:48:46,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.66666666666666) internal successors, (1320), 9 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,607 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 182.0) internal successors, (1820), 10 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,608 INFO L175 Difference]: Start difference. First operand has 147 places, 137 transitions, 299 flow. Second operand 9 states and 1320 transitions. [2022-11-16 12:48:46,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 147 transitions, 365 flow [2022-11-16 12:48:46,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 147 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:48:46,613 INFO L231 Difference]: Finished difference. Result has 157 places, 143 transitions, 347 flow [2022-11-16 12:48:46,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=157, PETRI_TRANSITIONS=143} [2022-11-16 12:48:46,616 INFO L288 CegarLoopForPetriNet]: 163 programPoint places, -6 predicate places. [2022-11-16 12:48:46,617 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 143 transitions, 347 flow [2022-11-16 12:48:46,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.3) internal successors, (1463), 10 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:46,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:46,618 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:46,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:46,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:46,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash -241818808, now seen corresponding path program 1 times [2022-11-16 12:48:46,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:46,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765611652] [2022-11-16 12:48:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:46,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:46,847 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:48:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:46,868 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:48:46,868 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:48:46,868 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:48:46,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:48:46,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:48:46,869 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:48:46,869 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:48:46,869 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 12:48:46,899 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:48:46,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 216 transitions, 476 flow [2022-11-16 12:48:47,008 INFO L130 PetriNetUnfolder]: 81/565 cut-off events. [2022-11-16 12:48:47,008 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 12:48:47,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 565 events. 81/565 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2176 event pairs, 6 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 390. Up to 32 conditions per place. [2022-11-16 12:48:47,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 216 transitions, 476 flow [2022-11-16 12:48:47,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 216 transitions, 476 flow [2022-11-16 12:48:47,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:48:47,020 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:48:47,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:48:47,027 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2022-11-16 12:48:47,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:48:47,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:47,028 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:47,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1801408074, now seen corresponding path program 1 times [2022-11-16 12:48:47,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:47,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239669772] [2022-11-16 12:48:47,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:47,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:47,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:47,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239669772] [2022-11-16 12:48:47,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239669772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:47,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:47,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479583840] [2022-11-16 12:48:47,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:47,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:48:47,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:48:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:48:47,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 216 [2022-11-16 12:48:47,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 216 transitions, 476 flow. Second operand has 2 states, 2 states have (on average 178.5) internal successors, (357), 2 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:47,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 216 [2022-11-16 12:48:47,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:47,198 INFO L130 PetriNetUnfolder]: 21/500 cut-off events. [2022-11-16 12:48:47,198 INFO L131 PetriNetUnfolder]: For 129/151 co-relation queries the response was YES. [2022-11-16 12:48:47,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 500 events. 21/500 cut-off events. For 129/151 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1975 event pairs, 6 based on Foata normal form. 248/722 useless extension candidates. Maximal degree in co-relation 359. Up to 37 conditions per place. [2022-11-16 12:48:47,201 INFO L137 encePairwiseOnDemand]: 187/216 looper letters, 4 selfloop transitions, 0 changer transitions 23/186 dead transitions. [2022-11-16 12:48:47,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 186 transitions, 432 flow [2022-11-16 12:48:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:48:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:48:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 393 transitions. [2022-11-16 12:48:47,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9097222222222222 [2022-11-16 12:48:47,203 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 393 transitions. [2022-11-16 12:48:47,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 393 transitions. [2022-11-16 12:48:47,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:47,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 393 transitions. [2022-11-16 12:48:47,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 196.5) internal successors, (393), 2 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,206 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,206 INFO L175 Difference]: Start difference. First operand has 192 places, 216 transitions, 476 flow. Second operand 2 states and 393 transitions. [2022-11-16 12:48:47,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 186 transitions, 432 flow [2022-11-16 12:48:47,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 186 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:47,210 INFO L231 Difference]: Finished difference. Result has 192 places, 163 transitions, 358 flow [2022-11-16 12:48:47,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=358, PETRI_PLACES=192, PETRI_TRANSITIONS=163} [2022-11-16 12:48:47,211 INFO L288 CegarLoopForPetriNet]: 192 programPoint places, 0 predicate places. [2022-11-16 12:48:47,211 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 163 transitions, 358 flow [2022-11-16 12:48:47,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 178.5) internal successors, (357), 2 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:47,212 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:48:47,212 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1997921579, now seen corresponding path program 1 times [2022-11-16 12:48:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:47,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641078982] [2022-11-16 12:48:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:47,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:47,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641078982] [2022-11-16 12:48:47,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641078982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:47,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:47,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403692700] [2022-11-16 12:48:47,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:47,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:47,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 216 [2022-11-16 12:48:47,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 163 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:47,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 216 [2022-11-16 12:48:47,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:47,317 INFO L130 PetriNetUnfolder]: 0/224 cut-off events. [2022-11-16 12:48:47,318 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 12:48:47,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 224 events. 0/224 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 516 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-16 12:48:47,319 INFO L137 encePairwiseOnDemand]: 213/216 looper letters, 13 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2022-11-16 12:48:47,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 167 transitions, 396 flow [2022-11-16 12:48:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:48:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-11-16 12:48:47,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.816358024691358 [2022-11-16 12:48:47,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-11-16 12:48:47,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-11-16 12:48:47,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:47,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-11-16 12:48:47,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,325 INFO L175 Difference]: Start difference. First operand has 192 places, 163 transitions, 358 flow. Second operand 3 states and 529 transitions. [2022-11-16 12:48:47,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 167 transitions, 396 flow [2022-11-16 12:48:47,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 167 transitions, 384 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:47,329 INFO L231 Difference]: Finished difference. Result has 176 places, 164 transitions, 358 flow [2022-11-16 12:48:47,330 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=176, PETRI_TRANSITIONS=164} [2022-11-16 12:48:47,330 INFO L288 CegarLoopForPetriNet]: 192 programPoint places, -16 predicate places. [2022-11-16 12:48:47,331 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 164 transitions, 358 flow [2022-11-16 12:48:47,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:47,331 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:48:47,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash -963985946, now seen corresponding path program 1 times [2022-11-16 12:48:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:47,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179015667] [2022-11-16 12:48:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:47,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179015667] [2022-11-16 12:48:47,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179015667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239162309] [2022-11-16 12:48:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:47,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:47,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:48:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:48:47,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:47,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:47,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239162309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:47,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:47,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:48:47,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73897463] [2022-11-16 12:48:47,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:47,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:48:47,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:48:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:48:47,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 216 [2022-11-16 12:48:47,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 164 transitions, 358 flow. Second operand has 10 states, 10 states have (on average 172.3) internal successors, (1723), 10 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:47,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 216 [2022-11-16 12:48:47,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:47,769 INFO L130 PetriNetUnfolder]: 0/204 cut-off events. [2022-11-16 12:48:47,769 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 12:48:47,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 204 events. 0/204 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 399 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-16 12:48:47,770 INFO L137 encePairwiseOnDemand]: 210/216 looper letters, 14 selfloop transitions, 9 changer transitions 0/174 dead transitions. [2022-11-16 12:48:47,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 174 transitions, 426 flow [2022-11-16 12:48:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:48:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1555 transitions. [2022-11-16 12:48:47,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7998971193415638 [2022-11-16 12:48:47,775 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1555 transitions. [2022-11-16 12:48:47,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1555 transitions. [2022-11-16 12:48:47,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:47,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1555 transitions. [2022-11-16 12:48:47,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.77777777777777) internal successors, (1555), 9 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,788 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,788 INFO L175 Difference]: Start difference. First operand has 176 places, 164 transitions, 358 flow. Second operand 9 states and 1555 transitions. [2022-11-16 12:48:47,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 174 transitions, 426 flow [2022-11-16 12:48:47,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 174 transitions, 424 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:48:47,793 INFO L231 Difference]: Finished difference. Result has 186 places, 170 transitions, 406 flow [2022-11-16 12:48:47,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=186, PETRI_TRANSITIONS=170} [2022-11-16 12:48:47,794 INFO L288 CegarLoopForPetriNet]: 192 programPoint places, -6 predicate places. [2022-11-16 12:48:47,794 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 170 transitions, 406 flow [2022-11-16 12:48:47,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 172.3) internal successors, (1723), 10 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:47,796 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:47,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:48,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:48,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:48,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1023405861, now seen corresponding path program 1 times [2022-11-16 12:48:48,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:48,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759721295] [2022-11-16 12:48:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:48,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:48,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:48,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759721295] [2022-11-16 12:48:48,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759721295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:48,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078810055] [2022-11-16 12:48:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:48,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:48,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:48,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:48,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:48:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:48:48,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:48,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:48,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078810055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:48,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:48,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:48:48,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256213465] [2022-11-16 12:48:48,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:48,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:48:48,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:48:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:48:48,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 216 [2022-11-16 12:48:48,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 170 transitions, 406 flow. Second operand has 18 states, 18 states have (on average 172.61111111111111) internal successors, (3107), 18 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:48,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:48,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 216 [2022-11-16 12:48:48,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:48,746 INFO L130 PetriNetUnfolder]: 0/184 cut-off events. [2022-11-16 12:48:48,746 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-16 12:48:48,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 184 events. 0/184 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-16 12:48:48,747 INFO L137 encePairwiseOnDemand]: 211/216 looper letters, 15 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2022-11-16 12:48:48,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 170 transitions, 474 flow [2022-11-16 12:48:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:48:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-16 12:48:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2580 transitions. [2022-11-16 12:48:48,753 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7962962962962963 [2022-11-16 12:48:48,754 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2580 transitions. [2022-11-16 12:48:48,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2580 transitions. [2022-11-16 12:48:48,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:48,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2580 transitions. [2022-11-16 12:48:48,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:48,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 216.0) internal successors, (3456), 16 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:48,770 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 216.0) internal successors, (3456), 16 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:48,771 INFO L175 Difference]: Start difference. First operand has 186 places, 170 transitions, 406 flow. Second operand 15 states and 2580 transitions. [2022-11-16 12:48:48,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 170 transitions, 474 flow [2022-11-16 12:48:48,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 170 transitions, 457 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-16 12:48:48,775 INFO L231 Difference]: Finished difference. Result has 186 places, 163 transitions, 406 flow [2022-11-16 12:48:48,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=406, PETRI_PLACES=186, PETRI_TRANSITIONS=163} [2022-11-16 12:48:48,777 INFO L288 CegarLoopForPetriNet]: 192 programPoint places, -6 predicate places. [2022-11-16 12:48:48,777 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 163 transitions, 406 flow [2022-11-16 12:48:48,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 172.61111111111111) internal successors, (3107), 18 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:48,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:48,779 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:48,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:48,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:48:48,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1240751962, now seen corresponding path program 1 times [2022-11-16 12:48:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108811734] [2022-11-16 12:48:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:48,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:49,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:48:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:49,026 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:48:49,027 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:48:49,027 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:48:49,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:48:49,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:48:49,027 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:48:49,028 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:48:49,028 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 12:48:49,059 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-16 12:48:49,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 250 transitions, 560 flow [2022-11-16 12:48:49,255 INFO L130 PetriNetUnfolder]: 140/900 cut-off events. [2022-11-16 12:48:49,256 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-16 12:48:49,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 140/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4075 event pairs, 23 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 610. Up to 80 conditions per place. [2022-11-16 12:48:49,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 250 transitions, 560 flow [2022-11-16 12:48:49,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 250 transitions, 560 flow [2022-11-16 12:48:49,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:48:49,274 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:48:49,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:48:49,281 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-16 12:48:49,281 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:48:49,281 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:49,282 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:49,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1641045200, now seen corresponding path program 1 times [2022-11-16 12:48:49,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:49,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829588081] [2022-11-16 12:48:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:49,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:49,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829588081] [2022-11-16 12:48:49,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829588081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:49,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:49,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:49,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794451352] [2022-11-16 12:48:49,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:49,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:48:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:48:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:48:49,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 250 [2022-11-16 12:48:49,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 250 transitions, 560 flow. Second operand has 2 states, 2 states have (on average 204.5) internal successors, (409), 2 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:49,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 250 [2022-11-16 12:48:49,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:49,512 INFO L130 PetriNetUnfolder]: 54/808 cut-off events. [2022-11-16 12:48:49,512 INFO L131 PetriNetUnfolder]: For 295/325 co-relation queries the response was YES. [2022-11-16 12:48:49,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 808 events. 54/808 cut-off events. For 295/325 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3793 event pairs, 23 based on Foata normal form. 574/1338 useless extension candidates. Maximal degree in co-relation 581. Up to 86 conditions per place. [2022-11-16 12:48:49,519 INFO L137 encePairwiseOnDemand]: 215/250 looper letters, 5 selfloop transitions, 0 changer transitions 24/214 dead transitions. [2022-11-16 12:48:49,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 214 transitions, 508 flow [2022-11-16 12:48:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:48:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:48:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 453 transitions. [2022-11-16 12:48:49,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.906 [2022-11-16 12:48:49,521 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 453 transitions. [2022-11-16 12:48:49,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 453 transitions. [2022-11-16 12:48:49,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:49,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 453 transitions. [2022-11-16 12:48:49,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 226.5) internal successors, (453), 2 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,525 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,525 INFO L175 Difference]: Start difference. First operand has 221 places, 250 transitions, 560 flow. Second operand 2 states and 453 transitions. [2022-11-16 12:48:49,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 214 transitions, 508 flow [2022-11-16 12:48:49,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 214 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:49,530 INFO L231 Difference]: Finished difference. Result has 221 places, 190 transitions, 425 flow [2022-11-16 12:48:49,531 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=425, PETRI_PLACES=221, PETRI_TRANSITIONS=190} [2022-11-16 12:48:49,531 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 0 predicate places. [2022-11-16 12:48:49,531 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 190 transitions, 425 flow [2022-11-16 12:48:49,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 204.5) internal successors, (409), 2 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:49,532 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:49,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:48:49,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:49,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1837558705, now seen corresponding path program 1 times [2022-11-16 12:48:49,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:49,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736351659] [2022-11-16 12:48:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:49,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:49,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:49,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736351659] [2022-11-16 12:48:49,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736351659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:49,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:49,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:49,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779036647] [2022-11-16 12:48:49,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:49,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:49,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:49,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:49,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:49,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 250 [2022-11-16 12:48:49,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 190 transitions, 425 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:49,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 250 [2022-11-16 12:48:49,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:49,659 INFO L130 PetriNetUnfolder]: 0/270 cut-off events. [2022-11-16 12:48:49,659 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 12:48:49,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 270 events. 0/270 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 677 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-16 12:48:49,660 INFO L137 encePairwiseOnDemand]: 247/250 looper letters, 14 selfloop transitions, 2 changer transitions 0/194 dead transitions. [2022-11-16 12:48:49,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 194 transitions, 465 flow [2022-11-16 12:48:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:48:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2022-11-16 12:48:49,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8106666666666666 [2022-11-16 12:48:49,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2022-11-16 12:48:49,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2022-11-16 12:48:49,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:49,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2022-11-16 12:48:49,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,669 INFO L175 Difference]: Start difference. First operand has 221 places, 190 transitions, 425 flow. Second operand 3 states and 608 transitions. [2022-11-16 12:48:49,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 194 transitions, 465 flow [2022-11-16 12:48:49,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 194 transitions, 445 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:49,674 INFO L231 Difference]: Finished difference. Result has 205 places, 191 transitions, 417 flow [2022-11-16 12:48:49,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=417, PETRI_PLACES=205, PETRI_TRANSITIONS=191} [2022-11-16 12:48:49,675 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, -16 predicate places. [2022-11-16 12:48:49,675 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 191 transitions, 417 flow [2022-11-16 12:48:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:49,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:49,676 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:48:49,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1479923456, now seen corresponding path program 1 times [2022-11-16 12:48:49,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:49,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128131441] [2022-11-16 12:48:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:49,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:49,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:49,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128131441] [2022-11-16 12:48:49,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128131441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:49,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257477400] [2022-11-16 12:48:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:49,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:49,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:49,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:49,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:48:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:49,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:48:49,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:49,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:49,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257477400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:49,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:49,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:48:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218153341] [2022-11-16 12:48:49,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:49,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:48:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:49,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:48:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:48:49,990 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 250 [2022-11-16 12:48:50,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 191 transitions, 417 flow. Second operand has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:50,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:50,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 250 [2022-11-16 12:48:50,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:50,140 INFO L130 PetriNetUnfolder]: 0/250 cut-off events. [2022-11-16 12:48:50,141 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:48:50,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 250 events. 0/250 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 560 event pairs, 0 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 12:48:50,142 INFO L137 encePairwiseOnDemand]: 244/250 looper letters, 15 selfloop transitions, 9 changer transitions 0/201 dead transitions. [2022-11-16 12:48:50,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 201 transitions, 487 flow [2022-11-16 12:48:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:48:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1790 transitions. [2022-11-16 12:48:50,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7955555555555556 [2022-11-16 12:48:50,147 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1790 transitions. [2022-11-16 12:48:50,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1790 transitions. [2022-11-16 12:48:50,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:50,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1790 transitions. [2022-11-16 12:48:50,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.88888888888889) internal successors, (1790), 9 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:50,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:50,159 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 250.0) internal successors, (2500), 10 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:50,159 INFO L175 Difference]: Start difference. First operand has 205 places, 191 transitions, 417 flow. Second operand 9 states and 1790 transitions. [2022-11-16 12:48:50,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 201 transitions, 487 flow [2022-11-16 12:48:50,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 201 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:48:50,164 INFO L231 Difference]: Finished difference. Result has 215 places, 197 transitions, 465 flow [2022-11-16 12:48:50,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=465, PETRI_PLACES=215, PETRI_TRANSITIONS=197} [2022-11-16 12:48:50,165 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, -6 predicate places. [2022-11-16 12:48:50,165 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 197 transitions, 465 flow [2022-11-16 12:48:50,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:50,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:50,166 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:50,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:50,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:50,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1494105983, now seen corresponding path program 1 times [2022-11-16 12:48:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:50,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518666227] [2022-11-16 12:48:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:50,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:50,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518666227] [2022-11-16 12:48:50,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518666227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:50,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421563001] [2022-11-16 12:48:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:50,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:50,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:50,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:50,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:48:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:50,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:48:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:50,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:50,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421563001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:50,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:50,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:48:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134099265] [2022-11-16 12:48:50,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:50,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:48:50,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:48:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:48:50,936 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 250 [2022-11-16 12:48:50,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 197 transitions, 465 flow. Second operand has 18 states, 18 states have (on average 198.61111111111111) internal successors, (3575), 18 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:50,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:50,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 250 [2022-11-16 12:48:50,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:51,180 INFO L130 PetriNetUnfolder]: 0/220 cut-off events. [2022-11-16 12:48:51,180 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-16 12:48:51,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 220 events. 0/220 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/223 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-16 12:48:51,181 INFO L137 encePairwiseOnDemand]: 245/250 looper letters, 18 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2022-11-16 12:48:51,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 202 transitions, 569 flow [2022-11-16 12:48:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:48:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:48:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3565 transitions. [2022-11-16 12:48:51,189 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922222222222223 [2022-11-16 12:48:51,190 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3565 transitions. [2022-11-16 12:48:51,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3565 transitions. [2022-11-16 12:48:51,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:51,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3565 transitions. [2022-11-16 12:48:51,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.05555555555554) internal successors, (3565), 18 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:51,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:51,209 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 250.0) internal successors, (4750), 19 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:51,210 INFO L175 Difference]: Start difference. First operand has 215 places, 197 transitions, 465 flow. Second operand 18 states and 3565 transitions. [2022-11-16 12:48:51,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 202 transitions, 569 flow [2022-11-16 12:48:51,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 202 transitions, 548 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-16 12:48:51,215 INFO L231 Difference]: Finished difference. Result has 218 places, 193 transitions, 484 flow [2022-11-16 12:48:51,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=484, PETRI_PLACES=218, PETRI_TRANSITIONS=193} [2022-11-16 12:48:51,216 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, -3 predicate places. [2022-11-16 12:48:51,216 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 193 transitions, 484 flow [2022-11-16 12:48:51,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 198.61111111111111) internal successors, (3575), 18 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:51,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:51,218 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:51,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:51,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:51,423 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:51,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1525908781, now seen corresponding path program 1 times [2022-11-16 12:48:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:51,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611870924] [2022-11-16 12:48:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:51,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:51,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:48:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:51,474 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:48:51,474 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:48:51,474 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:48:51,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:48:51,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 12:48:51,475 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:48:51,476 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:48:51,476 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-16 12:48:51,525 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-11-16 12:48:51,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 284 transitions, 646 flow [2022-11-16 12:48:51,878 INFO L130 PetriNetUnfolder]: 263/1523 cut-off events. [2022-11-16 12:48:51,878 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-11-16 12:48:51,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 1523 events. 263/1523 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8447 event pairs, 72 based on Foata normal form. 0/1317 useless extension candidates. Maximal degree in co-relation 999. Up to 192 conditions per place. [2022-11-16 12:48:51,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 284 transitions, 646 flow [2022-11-16 12:48:51,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 284 transitions, 646 flow [2022-11-16 12:48:51,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:48:51,923 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:48:51,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:48:51,930 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-16 12:48:51,930 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:48:51,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:51,931 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:51,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:51,931 INFO L85 PathProgramCache]: Analyzing trace with hash 327833420, now seen corresponding path program 1 times [2022-11-16 12:48:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:51,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889088593] [2022-11-16 12:48:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:51,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889088593] [2022-11-16 12:48:51,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889088593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:51,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:51,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:51,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755542025] [2022-11-16 12:48:51,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:51,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:48:51,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:48:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:48:51,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 284 [2022-11-16 12:48:51,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 284 transitions, 646 flow. Second operand has 2 states, 2 states have (on average 230.5) internal successors, (461), 2 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:51,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:51,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 284 [2022-11-16 12:48:51,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:52,333 INFO L130 PetriNetUnfolder]: 135/1388 cut-off events. [2022-11-16 12:48:52,333 INFO L131 PetriNetUnfolder]: For 651/673 co-relation queries the response was YES. [2022-11-16 12:48:52,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1819 conditions, 1388 events. 135/1388 cut-off events. For 651/673 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8138 event pairs, 72 based on Foata normal form. 1306/2616 useless extension candidates. Maximal degree in co-relation 992. Up to 199 conditions per place. [2022-11-16 12:48:52,346 INFO L137 encePairwiseOnDemand]: 243/284 looper letters, 6 selfloop transitions, 0 changer transitions 25/242 dead transitions. [2022-11-16 12:48:52,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 242 transitions, 586 flow [2022-11-16 12:48:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:48:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:48:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 513 transitions. [2022-11-16 12:48:52,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.903169014084507 [2022-11-16 12:48:52,349 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 513 transitions. [2022-11-16 12:48:52,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 513 transitions. [2022-11-16 12:48:52,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:52,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 513 transitions. [2022-11-16 12:48:52,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 256.5) internal successors, (513), 2 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,353 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,353 INFO L175 Difference]: Start difference. First operand has 250 places, 284 transitions, 646 flow. Second operand 2 states and 513 transitions. [2022-11-16 12:48:52,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 242 transitions, 586 flow [2022-11-16 12:48:52,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 242 transitions, 586 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:52,359 INFO L231 Difference]: Finished difference. Result has 250 places, 217 transitions, 494 flow [2022-11-16 12:48:52,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=494, PETRI_PLACES=250, PETRI_TRANSITIONS=217} [2022-11-16 12:48:52,360 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 0 predicate places. [2022-11-16 12:48:52,360 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 217 transitions, 494 flow [2022-11-16 12:48:52,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 230.5) internal successors, (461), 2 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:52,361 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:52,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 12:48:52,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash 131319915, now seen corresponding path program 1 times [2022-11-16 12:48:52,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531907048] [2022-11-16 12:48:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:52,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531907048] [2022-11-16 12:48:52,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531907048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:52,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:52,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:52,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116687493] [2022-11-16 12:48:52,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:52,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:52,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:52,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:52,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:52,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 284 [2022-11-16 12:48:52,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 217 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:52,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 284 [2022-11-16 12:48:52,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:52,491 INFO L130 PetriNetUnfolder]: 0/316 cut-off events. [2022-11-16 12:48:52,491 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-16 12:48:52,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 316 events. 0/316 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 840 event pairs, 0 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-16 12:48:52,492 INFO L137 encePairwiseOnDemand]: 281/284 looper letters, 15 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2022-11-16 12:48:52,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 221 transitions, 536 flow [2022-11-16 12:48:52,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:48:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2022-11-16 12:48:52,495 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8063380281690141 [2022-11-16 12:48:52,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2022-11-16 12:48:52,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2022-11-16 12:48:52,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:52,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2022-11-16 12:48:52,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,500 INFO L175 Difference]: Start difference. First operand has 250 places, 217 transitions, 494 flow. Second operand 3 states and 687 transitions. [2022-11-16 12:48:52,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 221 transitions, 536 flow [2022-11-16 12:48:52,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 221 transitions, 506 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:52,504 INFO L231 Difference]: Finished difference. Result has 234 places, 218 transitions, 476 flow [2022-11-16 12:48:52,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=234, PETRI_TRANSITIONS=218} [2022-11-16 12:48:52,506 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, -16 predicate places. [2022-11-16 12:48:52,506 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 218 transitions, 476 flow [2022-11-16 12:48:52,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:52,507 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:52,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 12:48:52,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash 224576892, now seen corresponding path program 1 times [2022-11-16 12:48:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:52,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84232686] [2022-11-16 12:48:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:52,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:52,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:52,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84232686] [2022-11-16 12:48:52,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84232686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:52,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798906818] [2022-11-16 12:48:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:52,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:52,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:52,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:52,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:48:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:52,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:48:52,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:52,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:52,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798906818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:52,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:52,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:48:52,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513116192] [2022-11-16 12:48:52,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:52,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:48:52,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:52,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:48:52,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:48:52,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 284 [2022-11-16 12:48:52,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 218 transitions, 476 flow. Second operand has 10 states, 10 states have (on average 224.3) internal successors, (2243), 10 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:52,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 284 [2022-11-16 12:48:52,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:52,962 INFO L130 PetriNetUnfolder]: 0/296 cut-off events. [2022-11-16 12:48:52,963 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 12:48:52,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 296 events. 0/296 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 721 event pairs, 0 based on Foata normal form. 2/298 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-16 12:48:52,964 INFO L137 encePairwiseOnDemand]: 278/284 looper letters, 16 selfloop transitions, 9 changer transitions 0/228 dead transitions. [2022-11-16 12:48:52,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 228 transitions, 548 flow [2022-11-16 12:48:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:48:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2025 transitions. [2022-11-16 12:48:52,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922535211267606 [2022-11-16 12:48:52,970 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2025 transitions. [2022-11-16 12:48:52,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2025 transitions. [2022-11-16 12:48:52,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:52,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2025 transitions. [2022-11-16 12:48:52,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.0) internal successors, (2025), 9 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,981 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 284.0) internal successors, (2840), 10 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,981 INFO L175 Difference]: Start difference. First operand has 234 places, 218 transitions, 476 flow. Second operand 9 states and 2025 transitions. [2022-11-16 12:48:52,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 228 transitions, 548 flow [2022-11-16 12:48:52,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 228 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:48:52,987 INFO L231 Difference]: Finished difference. Result has 244 places, 224 transitions, 524 flow [2022-11-16 12:48:52,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=524, PETRI_PLACES=244, PETRI_TRANSITIONS=224} [2022-11-16 12:48:52,988 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, -6 predicate places. [2022-11-16 12:48:52,988 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 224 transitions, 524 flow [2022-11-16 12:48:52,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 224.3) internal successors, (2243), 10 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:52,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:52,990 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:53,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:53,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:53,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:53,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1503476411, now seen corresponding path program 1 times [2022-11-16 12:48:53,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:53,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609348621] [2022-11-16 12:48:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:53,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:53,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609348621] [2022-11-16 12:48:53,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609348621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056098226] [2022-11-16 12:48:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:53,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:53,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:53,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:48:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:53,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:48:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:53,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:53,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056098226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:53,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:53,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:48:53,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133321648] [2022-11-16 12:48:53,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:53,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:48:53,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:48:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:48:53,712 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 284 [2022-11-16 12:48:53,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 224 transitions, 524 flow. Second operand has 18 states, 18 states have (on average 224.61111111111111) internal successors, (4043), 18 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:53,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:53,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 284 [2022-11-16 12:48:53,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:53,982 INFO L130 PetriNetUnfolder]: 0/256 cut-off events. [2022-11-16 12:48:53,982 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 12:48:53,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 256 events. 0/256 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/260 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-16 12:48:53,983 INFO L137 encePairwiseOnDemand]: 279/284 looper letters, 21 selfloop transitions, 19 changer transitions 0/234 dead transitions. [2022-11-16 12:48:53,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 234 transitions, 664 flow [2022-11-16 12:48:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:48:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:48:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4706 transitions. [2022-11-16 12:48:53,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7890677397719651 [2022-11-16 12:48:53,991 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4706 transitions. [2022-11-16 12:48:53,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4706 transitions. [2022-11-16 12:48:53,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:53,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4706 transitions. [2022-11-16 12:48:54,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 224.0952380952381) internal successors, (4706), 21 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:54,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:54,015 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 284.0) internal successors, (6248), 22 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:54,015 INFO L175 Difference]: Start difference. First operand has 244 places, 224 transitions, 524 flow. Second operand 21 states and 4706 transitions. [2022-11-16 12:48:54,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 234 transitions, 664 flow [2022-11-16 12:48:54,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 234 transitions, 639 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-16 12:48:54,021 INFO L231 Difference]: Finished difference. Result has 250 places, 223 transitions, 562 flow [2022-11-16 12:48:54,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=562, PETRI_PLACES=250, PETRI_TRANSITIONS=223} [2022-11-16 12:48:54,022 INFO L288 CegarLoopForPetriNet]: 250 programPoint places, 0 predicate places. [2022-11-16 12:48:54,022 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 223 transitions, 562 flow [2022-11-16 12:48:54,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 224.61111111111111) internal successors, (4043), 18 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:54,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:54,024 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:54,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:54,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:54,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash 398257985, now seen corresponding path program 1 times [2022-11-16 12:48:54,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:54,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311427072] [2022-11-16 12:48:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:54,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:54,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:48:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:54,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:48:54,307 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:48:54,307 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:48:54,308 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:48:54,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 12:48:54,308 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:48:54,311 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:48:54,311 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-16 12:48:54,361 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-11-16 12:48:54,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 318 transitions, 734 flow [2022-11-16 12:48:55,135 INFO L130 PetriNetUnfolder]: 530/2738 cut-off events. [2022-11-16 12:48:55,136 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-11-16 12:48:55,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3236 conditions, 2738 events. 530/2738 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18311 event pairs, 201 based on Foata normal form. 0/2392 useless extension candidates. Maximal degree in co-relation 1741. Up to 448 conditions per place. [2022-11-16 12:48:55,175 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 318 transitions, 734 flow [2022-11-16 12:48:55,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 318 transitions, 734 flow [2022-11-16 12:48:55,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:48:55,209 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:48:55,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:48:55,214 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-16 12:48:55,214 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:48:55,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:55,214 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:55,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:55,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:55,215 INFO L85 PathProgramCache]: Analyzing trace with hash -189739510, now seen corresponding path program 1 times [2022-11-16 12:48:55,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:55,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515079845] [2022-11-16 12:48:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:55,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:55,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:55,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515079845] [2022-11-16 12:48:55,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515079845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:55,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:55,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:55,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524741486] [2022-11-16 12:48:55,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:55,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:48:55,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:48:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:48:55,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 318 [2022-11-16 12:48:55,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 318 transitions, 734 flow. Second operand has 2 states, 2 states have (on average 256.5) internal successors, (513), 2 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:55,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:55,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 318 [2022-11-16 12:48:55,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:56,065 INFO L130 PetriNetUnfolder]: 328/2528 cut-off events. [2022-11-16 12:48:56,065 INFO L131 PetriNetUnfolder]: For 1455/1487 co-relation queries the response was YES. [2022-11-16 12:48:56,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 2528 events. 328/2528 cut-off events. For 1455/1487 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18038 event pairs, 201 based on Foata normal form. 2940/5324 useless extension candidates. Maximal degree in co-relation 1804. Up to 456 conditions per place. [2022-11-16 12:48:56,089 INFO L137 encePairwiseOnDemand]: 271/318 looper letters, 7 selfloop transitions, 0 changer transitions 26/270 dead transitions. [2022-11-16 12:48:56,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 270 transitions, 666 flow [2022-11-16 12:48:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:48:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:48:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 573 transitions. [2022-11-16 12:48:56,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9009433962264151 [2022-11-16 12:48:56,093 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 573 transitions. [2022-11-16 12:48:56,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 573 transitions. [2022-11-16 12:48:56,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:56,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 573 transitions. [2022-11-16 12:48:56,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 286.5) internal successors, (573), 2 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,150 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,150 INFO L175 Difference]: Start difference. First operand has 279 places, 318 transitions, 734 flow. Second operand 2 states and 573 transitions. [2022-11-16 12:48:56,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 270 transitions, 666 flow [2022-11-16 12:48:56,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 270 transitions, 666 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:56,155 INFO L231 Difference]: Finished difference. Result has 279 places, 244 transitions, 565 flow [2022-11-16 12:48:56,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=565, PETRI_PLACES=279, PETRI_TRANSITIONS=244} [2022-11-16 12:48:56,156 INFO L288 CegarLoopForPetriNet]: 279 programPoint places, 0 predicate places. [2022-11-16 12:48:56,156 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 244 transitions, 565 flow [2022-11-16 12:48:56,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 256.5) internal successors, (513), 2 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:56,156 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:56,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 12:48:56,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash -386253015, now seen corresponding path program 1 times [2022-11-16 12:48:56,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:56,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352382233] [2022-11-16 12:48:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:56,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:56,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:56,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352382233] [2022-11-16 12:48:56,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352382233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:56,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:56,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:56,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076613750] [2022-11-16 12:48:56,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:56,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:56,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:56,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:56,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 318 [2022-11-16 12:48:56,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 244 transitions, 565 flow. Second operand has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:56,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 318 [2022-11-16 12:48:56,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:56,295 INFO L130 PetriNetUnfolder]: 0/362 cut-off events. [2022-11-16 12:48:56,295 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-16 12:48:56,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 362 events. 0/362 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1002 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-16 12:48:56,296 INFO L137 encePairwiseOnDemand]: 315/318 looper letters, 16 selfloop transitions, 2 changer transitions 0/248 dead transitions. [2022-11-16 12:48:56,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 248 transitions, 609 flow [2022-11-16 12:48:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:48:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2022-11-16 12:48:56,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8029350104821803 [2022-11-16 12:48:56,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2022-11-16 12:48:56,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2022-11-16 12:48:56,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:56,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2022-11-16 12:48:56,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,303 INFO L175 Difference]: Start difference. First operand has 279 places, 244 transitions, 565 flow. Second operand 3 states and 766 transitions. [2022-11-16 12:48:56,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 248 transitions, 609 flow [2022-11-16 12:48:56,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 248 transitions, 567 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-16 12:48:56,308 INFO L231 Difference]: Finished difference. Result has 263 places, 245 transitions, 535 flow [2022-11-16 12:48:56,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=535, PETRI_PLACES=263, PETRI_TRANSITIONS=245} [2022-11-16 12:48:56,309 INFO L288 CegarLoopForPetriNet]: 279 programPoint places, -16 predicate places. [2022-11-16 12:48:56,309 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 245 transitions, 535 flow [2022-11-16 12:48:56,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:56,310 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 12:48:56,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash -435058342, now seen corresponding path program 1 times [2022-11-16 12:48:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:56,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261899149] [2022-11-16 12:48:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:56,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:56,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261899149] [2022-11-16 12:48:56,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261899149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:56,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167252935] [2022-11-16 12:48:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:56,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:56,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:56,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:48:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:48:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:56,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:56,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167252935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:56,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:56,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:48:56,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34968794] [2022-11-16 12:48:56,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:56,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:48:56,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:56,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:48:56,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:48:56,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 318 [2022-11-16 12:48:56,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 245 transitions, 535 flow. Second operand has 10 states, 10 states have (on average 250.3) internal successors, (2503), 10 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:56,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 318 [2022-11-16 12:48:56,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:56,829 INFO L130 PetriNetUnfolder]: 0/342 cut-off events. [2022-11-16 12:48:56,829 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-16 12:48:56,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 342 events. 0/342 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 885 event pairs, 0 based on Foata normal form. 2/344 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-16 12:48:56,831 INFO L137 encePairwiseOnDemand]: 312/318 looper letters, 17 selfloop transitions, 9 changer transitions 0/255 dead transitions. [2022-11-16 12:48:56,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 255 transitions, 609 flow [2022-11-16 12:48:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:48:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2260 transitions. [2022-11-16 12:48:56,838 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7896575821104123 [2022-11-16 12:48:56,838 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2260 transitions. [2022-11-16 12:48:56,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2260 transitions. [2022-11-16 12:48:56,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:56,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2260 transitions. [2022-11-16 12:48:56,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 251.11111111111111) internal successors, (2260), 9 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,856 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,856 INFO L175 Difference]: Start difference. First operand has 263 places, 245 transitions, 535 flow. Second operand 9 states and 2260 transitions. [2022-11-16 12:48:56,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 255 transitions, 609 flow [2022-11-16 12:48:56,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 255 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:48:56,864 INFO L231 Difference]: Finished difference. Result has 273 places, 251 transitions, 583 flow [2022-11-16 12:48:56,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=583, PETRI_PLACES=273, PETRI_TRANSITIONS=251} [2022-11-16 12:48:56,865 INFO L288 CegarLoopForPetriNet]: 279 programPoint places, -6 predicate places. [2022-11-16 12:48:56,865 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 251 transitions, 583 flow [2022-11-16 12:48:56,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 250.3) internal successors, (2503), 10 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:56,867 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:56,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 12:48:57,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:48:57,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1051517145, now seen corresponding path program 1 times [2022-11-16 12:48:57,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:57,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352732983] [2022-11-16 12:48:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:57,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:57,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:57,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352732983] [2022-11-16 12:48:57,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352732983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:57,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680629800] [2022-11-16 12:48:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:57,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:57,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:57,236 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:57,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:48:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:48:57,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:57,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:57,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680629800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:57,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:57,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:48:57,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279942982] [2022-11-16 12:48:57,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:57,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:48:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:48:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:48:57,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 318 [2022-11-16 12:48:57,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 251 transitions, 583 flow. Second operand has 18 states, 18 states have (on average 250.61111111111111) internal successors, (4511), 18 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:57,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:57,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 318 [2022-11-16 12:48:57,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:57,947 INFO L130 PetriNetUnfolder]: 0/302 cut-off events. [2022-11-16 12:48:57,948 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-16 12:48:57,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 302 events. 0/302 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 630 event pairs, 0 based on Foata normal form. 4/306 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-16 12:48:57,949 INFO L137 encePairwiseOnDemand]: 312/318 looper letters, 25 selfloop transitions, 21 changer transitions 0/275 dead transitions. [2022-11-16 12:48:57,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 275 transitions, 783 flow [2022-11-16 12:48:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:48:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:48:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5258 transitions. [2022-11-16 12:48:57,965 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.787361485474693 [2022-11-16 12:48:57,965 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5258 transitions. [2022-11-16 12:48:57,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5258 transitions. [2022-11-16 12:48:57,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:57,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5258 transitions. [2022-11-16 12:48:57,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 250.38095238095238) internal successors, (5258), 21 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:57,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:57,993 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:57,993 INFO L175 Difference]: Start difference. First operand has 273 places, 251 transitions, 583 flow. Second operand 21 states and 5258 transitions. [2022-11-16 12:48:57,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 275 transitions, 783 flow [2022-11-16 12:48:57,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 275 transitions, 769 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:48:58,001 INFO L231 Difference]: Finished difference. Result has 297 places, 264 transitions, 707 flow [2022-11-16 12:48:58,002 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=707, PETRI_PLACES=297, PETRI_TRANSITIONS=264} [2022-11-16 12:48:58,002 INFO L288 CegarLoopForPetriNet]: 279 programPoint places, 18 predicate places. [2022-11-16 12:48:58,002 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 264 transitions, 707 flow [2022-11-16 12:48:58,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 250.61111111111111) internal successors, (4511), 18 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:58,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:58,005 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:58,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:58,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:58,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:58,211 INFO L85 PathProgramCache]: Analyzing trace with hash 556017686, now seen corresponding path program 1 times [2022-11-16 12:48:58,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:58,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874948153] [2022-11-16 12:48:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:58,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:58,240 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:48:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:48:58,273 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:48:58,273 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:48:58,273 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:48:58,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:48:58,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 12:48:58,274 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:48:58,275 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:48:58,275 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-16 12:48:58,320 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-16 12:48:58,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 352 transitions, 824 flow [2022-11-16 12:48:59,699 INFO L130 PetriNetUnfolder]: 1117/5169 cut-off events. [2022-11-16 12:48:59,699 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-11-16 12:48:59,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6254 conditions, 5169 events. 1117/5169 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 41150 event pairs, 522 based on Foata normal form. 0/4555 useless extension candidates. Maximal degree in co-relation 3220. Up to 1024 conditions per place. [2022-11-16 12:48:59,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 352 transitions, 824 flow [2022-11-16 12:48:59,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 352 transitions, 824 flow [2022-11-16 12:48:59,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:48:59,829 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:48:59,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:48:59,834 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-16 12:48:59,834 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:48:59,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:59,834 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:59,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1101203306, now seen corresponding path program 1 times [2022-11-16 12:48:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974576318] [2022-11-16 12:48:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:59,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:59,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974576318] [2022-11-16 12:48:59,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974576318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:59,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:59,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:59,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126215245] [2022-11-16 12:48:59,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:59,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:48:59,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:48:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:48:59,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 352 [2022-11-16 12:48:59,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 352 transitions, 824 flow. Second operand has 2 states, 2 states have (on average 282.5) internal successors, (565), 2 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:59,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:59,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 352 [2022-11-16 12:48:59,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:01,796 INFO L130 PetriNetUnfolder]: 777/4820 cut-off events. [2022-11-16 12:49:01,796 INFO L131 PetriNetUnfolder]: For 3234/3284 co-relation queries the response was YES. [2022-11-16 12:49:01,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6938 conditions, 4820 events. 777/4820 cut-off events. For 3234/3284 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40237 event pairs, 522 based on Foata normal form. 6564/11110 useless extension candidates. Maximal degree in co-relation 3465. Up to 1033 conditions per place. [2022-11-16 12:49:01,835 INFO L137 encePairwiseOnDemand]: 299/352 looper letters, 8 selfloop transitions, 0 changer transitions 27/298 dead transitions. [2022-11-16 12:49:01,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 298 transitions, 748 flow [2022-11-16 12:49:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:49:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:49:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 633 transitions. [2022-11-16 12:49:01,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8991477272727273 [2022-11-16 12:49:01,837 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 633 transitions. [2022-11-16 12:49:01,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 633 transitions. [2022-11-16 12:49:01,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:01,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 633 transitions. [2022-11-16 12:49:01,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 316.5) internal successors, (633), 2 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:01,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:01,841 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:01,841 INFO L175 Difference]: Start difference. First operand has 308 places, 352 transitions, 824 flow. Second operand 2 states and 633 transitions. [2022-11-16 12:49:01,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 298 transitions, 748 flow [2022-11-16 12:49:01,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 298 transitions, 748 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:49:01,847 INFO L231 Difference]: Finished difference. Result has 308 places, 271 transitions, 638 flow [2022-11-16 12:49:01,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=638, PETRI_PLACES=308, PETRI_TRANSITIONS=271} [2022-11-16 12:49:01,848 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, 0 predicate places. [2022-11-16 12:49:01,849 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 271 transitions, 638 flow [2022-11-16 12:49:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 282.5) internal successors, (565), 2 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:01,849 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:01,849 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-16 12:49:01,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:01,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:01,850 INFO L85 PathProgramCache]: Analyzing trace with hash 904689801, now seen corresponding path program 1 times [2022-11-16 12:49:01,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:01,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244401966] [2022-11-16 12:49:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:01,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:01,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244401966] [2022-11-16 12:49:01,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244401966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:01,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:01,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:01,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278994664] [2022-11-16 12:49:01,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:01,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:01,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:01,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 352 [2022-11-16 12:49:01,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 271 transitions, 638 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:01,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:01,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 352 [2022-11-16 12:49:01,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:02,005 INFO L130 PetriNetUnfolder]: 0/408 cut-off events. [2022-11-16 12:49:02,005 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-16 12:49:02,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 408 events. 0/408 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1157 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-16 12:49:02,006 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 17 selfloop transitions, 2 changer transitions 0/275 dead transitions. [2022-11-16 12:49:02,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 275 transitions, 684 flow [2022-11-16 12:49:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:49:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2022-11-16 12:49:02,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8001893939393939 [2022-11-16 12:49:02,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2022-11-16 12:49:02,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2022-11-16 12:49:02,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:02,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2022-11-16 12:49:02,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,013 INFO L175 Difference]: Start difference. First operand has 308 places, 271 transitions, 638 flow. Second operand 3 states and 845 transitions. [2022-11-16 12:49:02,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 275 transitions, 684 flow [2022-11-16 12:49:02,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 275 transitions, 628 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-16 12:49:02,019 INFO L231 Difference]: Finished difference. Result has 292 places, 272 transitions, 594 flow [2022-11-16 12:49:02,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=594, PETRI_PLACES=292, PETRI_TRANSITIONS=272} [2022-11-16 12:49:02,020 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, -16 predicate places. [2022-11-16 12:49:02,021 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 272 transitions, 594 flow [2022-11-16 12:49:02,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:02,021 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:02,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-16 12:49:02,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:02,022 INFO L85 PathProgramCache]: Analyzing trace with hash -498982246, now seen corresponding path program 1 times [2022-11-16 12:49:02,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:02,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600005439] [2022-11-16 12:49:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:02,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:02,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600005439] [2022-11-16 12:49:02,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600005439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:02,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187203948] [2022-11-16 12:49:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:02,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:02,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:02,077 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:02,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:49:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:02,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:49:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:02,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:02,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187203948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:02,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:02,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:49:02,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321874809] [2022-11-16 12:49:02,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:02,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:49:02,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:49:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:49:02,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 352 [2022-11-16 12:49:02,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 272 transitions, 594 flow. Second operand has 10 states, 10 states have (on average 276.3) internal successors, (2763), 10 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:02,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 352 [2022-11-16 12:49:02,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:02,497 INFO L130 PetriNetUnfolder]: 0/388 cut-off events. [2022-11-16 12:49:02,497 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-16 12:49:02,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 388 events. 0/388 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1043 event pairs, 0 based on Foata normal form. 2/390 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-16 12:49:02,498 INFO L137 encePairwiseOnDemand]: 346/352 looper letters, 18 selfloop transitions, 9 changer transitions 0/282 dead transitions. [2022-11-16 12:49:02,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 282 transitions, 670 flow [2022-11-16 12:49:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:49:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:49:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2495 transitions. [2022-11-16 12:49:02,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7875631313131313 [2022-11-16 12:49:02,514 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2495 transitions. [2022-11-16 12:49:02,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2495 transitions. [2022-11-16 12:49:02,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:02,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2495 transitions. [2022-11-16 12:49:02,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 277.22222222222223) internal successors, (2495), 9 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,525 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,525 INFO L175 Difference]: Start difference. First operand has 292 places, 272 transitions, 594 flow. Second operand 9 states and 2495 transitions. [2022-11-16 12:49:02,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 282 transitions, 670 flow [2022-11-16 12:49:02,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 282 transitions, 668 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:49:02,531 INFO L231 Difference]: Finished difference. Result has 302 places, 278 transitions, 642 flow [2022-11-16 12:49:02,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=642, PETRI_PLACES=302, PETRI_TRANSITIONS=278} [2022-11-16 12:49:02,532 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, -6 predicate places. [2022-11-16 12:49:02,532 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 278 transitions, 642 flow [2022-11-16 12:49:02,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.3) internal successors, (2763), 10 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:02,535 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:02,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:02,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 12:49:02,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:02,741 INFO L85 PathProgramCache]: Analyzing trace with hash 138228185, now seen corresponding path program 1 times [2022-11-16 12:49:02,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:02,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078929106] [2022-11-16 12:49:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:02,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:02,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:02,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078929106] [2022-11-16 12:49:02,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078929106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:02,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640952460] [2022-11-16 12:49:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:02,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:02,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:02,867 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:02,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:49:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:03,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:49:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:03,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:03,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640952460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:03,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:03,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:49:03,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056052882] [2022-11-16 12:49:03,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:03,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:49:03,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:03,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:49:03,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:49:03,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 352 [2022-11-16 12:49:03,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 278 transitions, 642 flow. Second operand has 18 states, 18 states have (on average 276.6111111111111) internal successors, (4979), 18 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:03,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:03,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 352 [2022-11-16 12:49:03,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:03,627 INFO L130 PetriNetUnfolder]: 0/348 cut-off events. [2022-11-16 12:49:03,627 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-16 12:49:03,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 348 events. 0/348 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 791 event pairs, 0 based on Foata normal form. 4/352 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-16 12:49:03,628 INFO L137 encePairwiseOnDemand]: 346/352 looper letters, 26 selfloop transitions, 21 changer transitions 0/302 dead transitions. [2022-11-16 12:49:03,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 302 transitions, 844 flow [2022-11-16 12:49:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:49:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:49:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5805 transitions. [2022-11-16 12:49:03,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7853084415584416 [2022-11-16 12:49:03,636 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5805 transitions. [2022-11-16 12:49:03,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5805 transitions. [2022-11-16 12:49:03,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:03,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5805 transitions. [2022-11-16 12:49:03,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 276.42857142857144) internal successors, (5805), 21 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:03,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 352.0) internal successors, (7744), 22 states have internal predecessors, (7744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:03,659 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 352.0) internal successors, (7744), 22 states have internal predecessors, (7744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:03,659 INFO L175 Difference]: Start difference. First operand has 302 places, 278 transitions, 642 flow. Second operand 21 states and 5805 transitions. [2022-11-16 12:49:03,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 302 transitions, 844 flow [2022-11-16 12:49:03,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 302 transitions, 830 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:49:03,665 INFO L231 Difference]: Finished difference. Result has 326 places, 291 transitions, 766 flow [2022-11-16 12:49:03,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=766, PETRI_PLACES=326, PETRI_TRANSITIONS=291} [2022-11-16 12:49:03,673 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, 18 predicate places. [2022-11-16 12:49:03,673 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 291 transitions, 766 flow [2022-11-16 12:49:03,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 276.6111111111111) internal successors, (4979), 18 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:03,674 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:03,674 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:03,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:03,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 12:49:03,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:03,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1463541813, now seen corresponding path program 1 times [2022-11-16 12:49:03,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:03,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445802577] [2022-11-16 12:49:03,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:03,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:04,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:04,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445802577] [2022-11-16 12:49:04,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445802577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:04,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182957815] [2022-11-16 12:49:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:04,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:04,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:04,230 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:04,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:49:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:49:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:04,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:04,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182957815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:04,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:04,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 12:49:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030181307] [2022-11-16 12:49:04,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:04,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:49:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:49:04,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:49:04,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 352 [2022-11-16 12:49:04,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 291 transitions, 766 flow. Second operand has 34 states, 34 states have (on average 276.79411764705884) internal successors, (9411), 34 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:04,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:04,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 352 [2022-11-16 12:49:04,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:05,372 INFO L130 PetriNetUnfolder]: 0/328 cut-off events. [2022-11-16 12:49:05,372 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-16 12:49:05,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 328 events. 0/328 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/330 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-16 12:49:05,373 INFO L137 encePairwiseOnDemand]: 347/352 looper letters, 27 selfloop transitions, 25 changer transitions 0/298 dead transitions. [2022-11-16 12:49:05,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 298 transitions, 916 flow [2022-11-16 12:49:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:49:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 12:49:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7452 transitions. [2022-11-16 12:49:05,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7840909090909091 [2022-11-16 12:49:05,382 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7452 transitions. [2022-11-16 12:49:05,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7452 transitions. [2022-11-16 12:49:05,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:05,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7452 transitions. [2022-11-16 12:49:05,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 276.0) internal successors, (7452), 27 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:05,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 352.0) internal successors, (9856), 28 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:05,408 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 352.0) internal successors, (9856), 28 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:05,408 INFO L175 Difference]: Start difference. First operand has 326 places, 291 transitions, 766 flow. Second operand 27 states and 7452 transitions. [2022-11-16 12:49:05,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 298 transitions, 916 flow [2022-11-16 12:49:05,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 298 transitions, 862 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-16 12:49:05,415 INFO L231 Difference]: Finished difference. Result has 329 places, 284 transitions, 755 flow [2022-11-16 12:49:05,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=755, PETRI_PLACES=329, PETRI_TRANSITIONS=284} [2022-11-16 12:49:05,417 INFO L288 CegarLoopForPetriNet]: 308 programPoint places, 21 predicate places. [2022-11-16 12:49:05,417 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 284 transitions, 755 flow [2022-11-16 12:49:05,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 276.79411764705884) internal successors, (9411), 34 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:05,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:05,419 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:05,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:05,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 12:49:05,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:05,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1493505492, now seen corresponding path program 1 times [2022-11-16 12:49:05,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:05,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284603385] [2022-11-16 12:49:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:05,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:49:05,657 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:49:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:49:05,715 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:49:05,716 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:49:05,717 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:49:05,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:49:05,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-16 12:49:05,718 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 12:49:05,720 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:49:05,720 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-16 12:49:05,807 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-11-16 12:49:05,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 386 transitions, 916 flow [2022-11-16 12:49:08,912 INFO L130 PetriNetUnfolder]: 2408/10096 cut-off events. [2022-11-16 12:49:08,912 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-11-16 12:49:09,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12473 conditions, 10096 events. 2408/10096 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 93554 event pairs, 1291 based on Foata normal form. 0/8958 useless extension candidates. Maximal degree in co-relation 6236. Up to 2304 conditions per place. [2022-11-16 12:49:09,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 386 transitions, 916 flow [2022-11-16 12:49:09,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 386 transitions, 916 flow [2022-11-16 12:49:09,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:49:09,181 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:49:09,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:49:09,186 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-16 12:49:09,186 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:49:09,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:09,186 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:09,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash -94305428, now seen corresponding path program 1 times [2022-11-16 12:49:09,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:09,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56684025] [2022-11-16 12:49:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:09,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:09,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:09,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56684025] [2022-11-16 12:49:09,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56684025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:09,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:09,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:09,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150210043] [2022-11-16 12:49:09,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:09,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:49:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:49:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:49:09,208 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 386 [2022-11-16 12:49:09,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 386 transitions, 916 flow. Second operand has 2 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:09,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:09,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 386 [2022-11-16 12:49:09,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:12,796 INFO L130 PetriNetUnfolder]: 1802/9480 cut-off events. [2022-11-16 12:49:12,797 INFO L131 PetriNetUnfolder]: For 7122/7170 co-relation queries the response was YES. [2022-11-16 12:49:12,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14171 conditions, 9480 events. 1802/9480 cut-off events. For 7122/7170 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91196 event pairs, 1291 based on Foata normal form. 14546/23494 useless extension candidates. Maximal degree in co-relation 6919. Up to 2314 conditions per place. [2022-11-16 12:49:12,855 INFO L137 encePairwiseOnDemand]: 327/386 looper letters, 9 selfloop transitions, 0 changer transitions 28/326 dead transitions. [2022-11-16 12:49:12,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 326 transitions, 832 flow [2022-11-16 12:49:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:49:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:49:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 693 transitions. [2022-11-16 12:49:12,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8976683937823834 [2022-11-16 12:49:12,858 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 693 transitions. [2022-11-16 12:49:12,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 693 transitions. [2022-11-16 12:49:12,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:12,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 693 transitions. [2022-11-16 12:49:12,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 346.5) internal successors, (693), 2 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:12,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:12,863 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:12,863 INFO L175 Difference]: Start difference. First operand has 337 places, 386 transitions, 916 flow. Second operand 2 states and 693 transitions. [2022-11-16 12:49:12,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 326 transitions, 832 flow [2022-11-16 12:49:12,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 326 transitions, 832 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:49:12,872 INFO L231 Difference]: Finished difference. Result has 337 places, 298 transitions, 713 flow [2022-11-16 12:49:12,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=713, PETRI_PLACES=337, PETRI_TRANSITIONS=298} [2022-11-16 12:49:12,873 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, 0 predicate places. [2022-11-16 12:49:12,873 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 298 transitions, 713 flow [2022-11-16 12:49:12,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:12,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:12,874 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:12,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-16 12:49:12,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:12,875 INFO L85 PathProgramCache]: Analyzing trace with hash -290818933, now seen corresponding path program 1 times [2022-11-16 12:49:12,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:12,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105053902] [2022-11-16 12:49:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:12,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:12,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:12,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105053902] [2022-11-16 12:49:12,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105053902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:12,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:12,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:12,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570496103] [2022-11-16 12:49:12,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:12,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:12,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:12,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:12,917 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 386 [2022-11-16 12:49:12,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 298 transitions, 713 flow. Second operand has 3 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:12,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:12,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 386 [2022-11-16 12:49:12,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:13,096 INFO L130 PetriNetUnfolder]: 0/454 cut-off events. [2022-11-16 12:49:13,097 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-16 12:49:13,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 454 events. 0/454 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1325 event pairs, 0 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-16 12:49:13,098 INFO L137 encePairwiseOnDemand]: 383/386 looper letters, 18 selfloop transitions, 2 changer transitions 0/302 dead transitions. [2022-11-16 12:49:13,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 302 transitions, 761 flow [2022-11-16 12:49:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:49:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 924 transitions. [2022-11-16 12:49:13,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7979274611398963 [2022-11-16 12:49:13,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 924 transitions. [2022-11-16 12:49:13,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 924 transitions. [2022-11-16 12:49:13,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:13,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 924 transitions. [2022-11-16 12:49:13,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:13,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:13,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:13,104 INFO L175 Difference]: Start difference. First operand has 337 places, 298 transitions, 713 flow. Second operand 3 states and 924 transitions. [2022-11-16 12:49:13,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 302 transitions, 761 flow [2022-11-16 12:49:13,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 302 transitions, 689 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-16 12:49:13,112 INFO L231 Difference]: Finished difference. Result has 321 places, 299 transitions, 653 flow [2022-11-16 12:49:13,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=653, PETRI_PLACES=321, PETRI_TRANSITIONS=299} [2022-11-16 12:49:13,113 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, -16 predicate places. [2022-11-16 12:49:13,113 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 299 transitions, 653 flow [2022-11-16 12:49:13,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:13,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:13,114 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:13,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-16 12:49:13,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash 32805180, now seen corresponding path program 1 times [2022-11-16 12:49:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:13,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45677642] [2022-11-16 12:49:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:13,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:13,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:13,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45677642] [2022-11-16 12:49:13,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45677642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:13,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575128524] [2022-11-16 12:49:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:13,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:13,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:13,195 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:13,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:49:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:49:13,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:13,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:13,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575128524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:13,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:13,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:49:13,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250000494] [2022-11-16 12:49:13,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:13,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:49:13,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:13,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:49:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:49:13,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 386 [2022-11-16 12:49:13,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 299 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 302.3) internal successors, (3023), 10 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:13,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:13,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 386 [2022-11-16 12:49:13,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:13,689 INFO L130 PetriNetUnfolder]: 0/434 cut-off events. [2022-11-16 12:49:13,689 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-16 12:49:13,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 434 events. 0/434 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1210 event pairs, 0 based on Foata normal form. 2/436 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-16 12:49:13,691 INFO L137 encePairwiseOnDemand]: 380/386 looper letters, 19 selfloop transitions, 9 changer transitions 0/309 dead transitions. [2022-11-16 12:49:13,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 309 transitions, 731 flow [2022-11-16 12:49:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:49:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:49:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2730 transitions. [2022-11-16 12:49:13,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7858376511226253 [2022-11-16 12:49:13,695 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2730 transitions. [2022-11-16 12:49:13,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2730 transitions. [2022-11-16 12:49:13,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:13,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2730 transitions. [2022-11-16 12:49:13,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 303.3333333333333) internal successors, (2730), 9 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:13,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 386.0) internal successors, (3860), 10 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:13,706 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 386.0) internal successors, (3860), 10 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:13,706 INFO L175 Difference]: Start difference. First operand has 321 places, 299 transitions, 653 flow. Second operand 9 states and 2730 transitions. [2022-11-16 12:49:13,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 309 transitions, 731 flow [2022-11-16 12:49:13,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 309 transitions, 729 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:49:13,714 INFO L231 Difference]: Finished difference. Result has 331 places, 305 transitions, 701 flow [2022-11-16 12:49:13,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=701, PETRI_PLACES=331, PETRI_TRANSITIONS=305} [2022-11-16 12:49:13,715 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, -6 predicate places. [2022-11-16 12:49:13,715 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 305 transitions, 701 flow [2022-11-16 12:49:13,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 302.3) internal successors, (3023), 10 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:13,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:13,717 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:13,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:13,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 12:49:13,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:13,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1236390469, now seen corresponding path program 1 times [2022-11-16 12:49:13,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:13,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429073150] [2022-11-16 12:49:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:13,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:14,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429073150] [2022-11-16 12:49:14,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429073150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076259871] [2022-11-16 12:49:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:14,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:14,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:49:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:14,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:49:14,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:14,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:14,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076259871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:14,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:14,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:49:14,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408794156] [2022-11-16 12:49:14,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:14,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:49:14,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:14,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:49:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:49:14,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 386 [2022-11-16 12:49:14,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 305 transitions, 701 flow. Second operand has 18 states, 18 states have (on average 302.6111111111111) internal successors, (5447), 18 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:14,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:14,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 386 [2022-11-16 12:49:14,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:14,872 INFO L130 PetriNetUnfolder]: 0/394 cut-off events. [2022-11-16 12:49:14,873 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 12:49:14,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 394 events. 0/394 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 952 event pairs, 0 based on Foata normal form. 4/398 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 12:49:14,874 INFO L137 encePairwiseOnDemand]: 380/386 looper letters, 27 selfloop transitions, 21 changer transitions 0/329 dead transitions. [2022-11-16 12:49:14,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 329 transitions, 905 flow [2022-11-16 12:49:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:49:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:49:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6352 transitions. [2022-11-16 12:49:14,882 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7836170737725142 [2022-11-16 12:49:14,883 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6352 transitions. [2022-11-16 12:49:14,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6352 transitions. [2022-11-16 12:49:14,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:14,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6352 transitions. [2022-11-16 12:49:14,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 302.4761904761905) internal successors, (6352), 21 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:15,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 386.0) internal successors, (8492), 22 states have internal predecessors, (8492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:15,017 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 386.0) internal successors, (8492), 22 states have internal predecessors, (8492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:15,017 INFO L175 Difference]: Start difference. First operand has 331 places, 305 transitions, 701 flow. Second operand 21 states and 6352 transitions. [2022-11-16 12:49:15,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 329 transitions, 905 flow [2022-11-16 12:49:15,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 329 transitions, 891 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:49:15,024 INFO L231 Difference]: Finished difference. Result has 355 places, 318 transitions, 825 flow [2022-11-16 12:49:15,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=825, PETRI_PLACES=355, PETRI_TRANSITIONS=318} [2022-11-16 12:49:15,025 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, 18 predicate places. [2022-11-16 12:49:15,025 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 318 transitions, 825 flow [2022-11-16 12:49:15,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 302.6111111111111) internal successors, (5447), 18 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:15,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:15,026 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:15,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:15,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:15,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash 666949165, now seen corresponding path program 1 times [2022-11-16 12:49:15,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:15,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405123972] [2022-11-16 12:49:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:15,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:15,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:15,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405123972] [2022-11-16 12:49:15,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405123972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:15,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935418452] [2022-11-16 12:49:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:15,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:15,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:15,555 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:15,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:49:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:49:15,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:15,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:16,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935418452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:16,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:16,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 12:49:16,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083247718] [2022-11-16 12:49:16,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:16,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:49:16,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:16,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:49:16,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:49:16,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 386 [2022-11-16 12:49:16,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 318 transitions, 825 flow. Second operand has 34 states, 34 states have (on average 302.79411764705884) internal successors, (10295), 34 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:16,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:16,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 386 [2022-11-16 12:49:16,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:16,722 INFO L130 PetriNetUnfolder]: 0/364 cut-off events. [2022-11-16 12:49:16,723 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-16 12:49:16,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 364 events. 0/364 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/367 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-16 12:49:16,724 INFO L137 encePairwiseOnDemand]: 381/386 looper letters, 30 selfloop transitions, 28 changer transitions 0/330 dead transitions. [2022-11-16 12:49:16,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 330 transitions, 1021 flow [2022-11-16 12:49:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:49:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-16 12:49:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9061 transitions. [2022-11-16 12:49:16,735 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7824697754749568 [2022-11-16 12:49:16,735 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9061 transitions. [2022-11-16 12:49:16,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9061 transitions. [2022-11-16 12:49:16,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:16,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9061 transitions. [2022-11-16 12:49:16,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 302.03333333333336) internal successors, (9061), 30 states have internal predecessors, (9061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:16,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 386.0) internal successors, (11966), 31 states have internal predecessors, (11966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:16,763 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 386.0) internal successors, (11966), 31 states have internal predecessors, (11966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:16,764 INFO L175 Difference]: Start difference. First operand has 355 places, 318 transitions, 825 flow. Second operand 30 states and 9061 transitions. [2022-11-16 12:49:16,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 330 transitions, 1021 flow [2022-11-16 12:49:16,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 330 transitions, 961 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-16 12:49:16,772 INFO L231 Difference]: Finished difference. Result has 361 places, 314 transitions, 838 flow [2022-11-16 12:49:16,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=838, PETRI_PLACES=361, PETRI_TRANSITIONS=314} [2022-11-16 12:49:16,774 INFO L288 CegarLoopForPetriNet]: 337 programPoint places, 24 predicate places. [2022-11-16 12:49:16,774 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 314 transitions, 838 flow [2022-11-16 12:49:16,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 302.79411764705884) internal successors, (10295), 34 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:16,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:16,776 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:16,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:16,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:16,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:16,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2070224899, now seen corresponding path program 1 times [2022-11-16 12:49:16,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:16,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032237245] [2022-11-16 12:49:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:16,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:49:17,035 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:49:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:49:17,082 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:49:17,082 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:49:17,083 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:49:17,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:49:17,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-16 12:49:17,083 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 12:49:17,084 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:49:17,084 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-16 12:49:17,129 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-16 12:49:17,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 366 places, 420 transitions, 1010 flow [2022-11-16 12:49:23,000 INFO L130 PetriNetUnfolder]: 5235/20143 cut-off events. [2022-11-16 12:49:23,001 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-11-16 12:49:23,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25349 conditions, 20143 events. 5235/20143 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 210468 event pairs, 3084 based on Foata normal form. 0/17969 useless extension candidates. Maximal degree in co-relation 12453. Up to 5120 conditions per place. [2022-11-16 12:49:23,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 366 places, 420 transitions, 1010 flow [2022-11-16 12:49:23,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 366 places, 420 transitions, 1010 flow [2022-11-16 12:49:23,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:49:23,572 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;@1ffaefe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:49:23,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:49:23,576 INFO L130 PetriNetUnfolder]: 2/75 cut-off events. [2022-11-16 12:49:23,576 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:49:23,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:23,576 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:23,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:23,577 INFO L85 PathProgramCache]: Analyzing trace with hash 518701584, now seen corresponding path program 1 times [2022-11-16 12:49:23,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:23,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414737680] [2022-11-16 12:49:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:23,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:23,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:23,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414737680] [2022-11-16 12:49:23,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414737680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:23,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:23,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:23,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408689256] [2022-11-16 12:49:23,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:23,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:49:23,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:23,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:49:23,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:49:23,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 420 [2022-11-16 12:49:23,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 420 transitions, 1010 flow. Second operand has 2 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:23,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:23,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 420 [2022-11-16 12:49:23,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:30,277 INFO L130 PetriNetUnfolder]: 4107/19004 cut-off events. [2022-11-16 12:49:30,277 INFO L131 PetriNetUnfolder]: For 15629/15669 co-relation queries the response was YES. [2022-11-16 12:49:30,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29341 conditions, 19004 events. 4107/19004 cut-off events. For 15629/15669 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 206777 event pairs, 3084 based on Foata normal form. 32006/49964 useless extension candidates. Maximal degree in co-relation 14150. Up to 5131 conditions per place. [2022-11-16 12:49:30,501 INFO L137 encePairwiseOnDemand]: 355/420 looper letters, 10 selfloop transitions, 0 changer transitions 29/354 dead transitions. [2022-11-16 12:49:30,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 354 transitions, 918 flow [2022-11-16 12:49:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:49:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:49:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 753 transitions. [2022-11-16 12:49:30,503 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8964285714285715 [2022-11-16 12:49:30,504 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 753 transitions. [2022-11-16 12:49:30,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 753 transitions. [2022-11-16 12:49:30,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:30,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 753 transitions. [2022-11-16 12:49:30,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 376.5) internal successors, (753), 2 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 420.0) internal successors, (1260), 3 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,508 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 420.0) internal successors, (1260), 3 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,509 INFO L175 Difference]: Start difference. First operand has 366 places, 420 transitions, 1010 flow. Second operand 2 states and 753 transitions. [2022-11-16 12:49:30,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 354 transitions, 918 flow [2022-11-16 12:49:30,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 354 transitions, 918 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:49:30,527 INFO L231 Difference]: Finished difference. Result has 366 places, 325 transitions, 790 flow [2022-11-16 12:49:30,527 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=790, PETRI_PLACES=366, PETRI_TRANSITIONS=325} [2022-11-16 12:49:30,528 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, 0 predicate places. [2022-11-16 12:49:30,528 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 325 transitions, 790 flow [2022-11-16 12:49:30,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,529 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:30,529 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:30,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-16 12:49:30,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:30,530 INFO L85 PathProgramCache]: Analyzing trace with hash 322188079, now seen corresponding path program 1 times [2022-11-16 12:49:30,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:30,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890506155] [2022-11-16 12:49:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:30,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:30,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:30,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890506155] [2022-11-16 12:49:30,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890506155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:30,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:30,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:30,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521983021] [2022-11-16 12:49:30,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:30,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:30,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:30,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:30,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 420 [2022-11-16 12:49:30,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 325 transitions, 790 flow. Second operand has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:30,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 420 [2022-11-16 12:49:30,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:30,742 INFO L130 PetriNetUnfolder]: 0/500 cut-off events. [2022-11-16 12:49:30,743 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-16 12:49:30,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 500 events. 0/500 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1487 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-16 12:49:30,744 INFO L137 encePairwiseOnDemand]: 417/420 looper letters, 19 selfloop transitions, 2 changer transitions 0/329 dead transitions. [2022-11-16 12:49:30,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 329 transitions, 840 flow [2022-11-16 12:49:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:49:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1003 transitions. [2022-11-16 12:49:30,746 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.796031746031746 [2022-11-16 12:49:30,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1003 transitions. [2022-11-16 12:49:30,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1003 transitions. [2022-11-16 12:49:30,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:30,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1003 transitions. [2022-11-16 12:49:30,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.3333333333333) internal successors, (1003), 3 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,750 INFO L175 Difference]: Start difference. First operand has 366 places, 325 transitions, 790 flow. Second operand 3 states and 1003 transitions. [2022-11-16 12:49:30,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 329 transitions, 840 flow [2022-11-16 12:49:30,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 329 transitions, 750 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-16 12:49:30,758 INFO L231 Difference]: Finished difference. Result has 350 places, 326 transitions, 712 flow [2022-11-16 12:49:30,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=712, PETRI_PLACES=350, PETRI_TRANSITIONS=326} [2022-11-16 12:49:30,759 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, -16 predicate places. [2022-11-16 12:49:30,759 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 326 transitions, 712 flow [2022-11-16 12:49:30,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:30,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:30,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-16 12:49:30,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1160303936, now seen corresponding path program 1 times [2022-11-16 12:49:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:30,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279155599] [2022-11-16 12:49:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:30,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:30,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:30,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279155599] [2022-11-16 12:49:30,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279155599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:30,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348316033] [2022-11-16 12:49:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:30,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:30,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:30,827 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:30,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:49:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:31,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:49:31,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:31,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:31,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348316033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:31,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:31,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:49:31,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535070238] [2022-11-16 12:49:31,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:31,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:49:31,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:49:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:49:31,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 420 [2022-11-16 12:49:31,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 326 transitions, 712 flow. Second operand has 10 states, 10 states have (on average 328.3) internal successors, (3283), 10 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:31,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:31,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 420 [2022-11-16 12:49:31,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:31,365 INFO L130 PetriNetUnfolder]: 0/480 cut-off events. [2022-11-16 12:49:31,365 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-16 12:49:31,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 480 events. 0/480 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1365 event pairs, 0 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-16 12:49:31,366 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 20 selfloop transitions, 9 changer transitions 0/336 dead transitions. [2022-11-16 12:49:31,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 336 transitions, 792 flow [2022-11-16 12:49:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:49:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:49:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2965 transitions. [2022-11-16 12:49:31,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7843915343915344 [2022-11-16 12:49:31,372 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2965 transitions. [2022-11-16 12:49:31,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2965 transitions. [2022-11-16 12:49:31,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:31,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2965 transitions. [2022-11-16 12:49:31,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 329.44444444444446) internal successors, (2965), 9 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:31,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:31,383 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:31,383 INFO L175 Difference]: Start difference. First operand has 350 places, 326 transitions, 712 flow. Second operand 9 states and 2965 transitions. [2022-11-16 12:49:31,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 336 transitions, 792 flow [2022-11-16 12:49:31,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 336 transitions, 790 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:49:31,391 INFO L231 Difference]: Finished difference. Result has 360 places, 332 transitions, 760 flow [2022-11-16 12:49:31,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=760, PETRI_PLACES=360, PETRI_TRANSITIONS=332} [2022-11-16 12:49:31,392 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, -6 predicate places. [2022-11-16 12:49:31,392 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 332 transitions, 760 flow [2022-11-16 12:49:31,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 328.3) internal successors, (3283), 10 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:31,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:31,394 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:31,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:31,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 12:49:31,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1222628479, now seen corresponding path program 1 times [2022-11-16 12:49:31,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:31,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941487637] [2022-11-16 12:49:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:31,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:31,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:31,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941487637] [2022-11-16 12:49:31,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941487637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:31,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936804040] [2022-11-16 12:49:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:31,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:31,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:31,964 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:31,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:49:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:32,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:49:32,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:32,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:32,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936804040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:32,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:32,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:49:32,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608906198] [2022-11-16 12:49:32,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:32,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:49:32,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:49:32,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:49:32,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 420 [2022-11-16 12:49:32,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 332 transitions, 760 flow. Second operand has 18 states, 18 states have (on average 328.6111111111111) internal successors, (5915), 18 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:32,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:32,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 420 [2022-11-16 12:49:32,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:32,663 INFO L130 PetriNetUnfolder]: 0/440 cut-off events. [2022-11-16 12:49:32,664 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-16 12:49:32,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 440 events. 0/440 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1113 event pairs, 0 based on Foata normal form. 4/444 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-16 12:49:32,665 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 28 selfloop transitions, 21 changer transitions 0/356 dead transitions. [2022-11-16 12:49:32,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 356 transitions, 966 flow [2022-11-16 12:49:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:49:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:49:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6899 transitions. [2022-11-16 12:49:32,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7821995464852608 [2022-11-16 12:49:32,671 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6899 transitions. [2022-11-16 12:49:32,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6899 transitions. [2022-11-16 12:49:32,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:32,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6899 transitions. [2022-11-16 12:49:32,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 328.5238095238095) internal successors, (6899), 21 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:32,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 420.0) internal successors, (9240), 22 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:32,685 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 420.0) internal successors, (9240), 22 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:32,686 INFO L175 Difference]: Start difference. First operand has 360 places, 332 transitions, 760 flow. Second operand 21 states and 6899 transitions. [2022-11-16 12:49:32,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 356 transitions, 966 flow [2022-11-16 12:49:32,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 356 transitions, 952 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:49:32,693 INFO L231 Difference]: Finished difference. Result has 384 places, 345 transitions, 884 flow [2022-11-16 12:49:32,694 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=884, PETRI_PLACES=384, PETRI_TRANSITIONS=345} [2022-11-16 12:49:32,694 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, 18 predicate places. [2022-11-16 12:49:32,694 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 345 transitions, 884 flow [2022-11-16 12:49:32,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 328.6111111111111) internal successors, (5915), 18 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:32,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:32,696 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:32,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:32,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 12:49:32,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:32,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1893114481, now seen corresponding path program 1 times [2022-11-16 12:49:32,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:32,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105238681] [2022-11-16 12:49:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:32,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:33,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:33,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105238681] [2022-11-16 12:49:33,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105238681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:33,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809538686] [2022-11-16 12:49:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:33,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:33,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:33,213 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:33,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:49:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:49:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:33,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:33,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809538686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:33,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:33,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 12:49:33,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298627738] [2022-11-16 12:49:33,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:33,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:49:33,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:49:33,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:49:33,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 420 [2022-11-16 12:49:33,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 345 transitions, 884 flow. Second operand has 34 states, 34 states have (on average 328.79411764705884) internal successors, (11179), 34 states have internal predecessors, (11179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:33,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:33,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 420 [2022-11-16 12:49:33,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:34,425 INFO L130 PetriNetUnfolder]: 0/400 cut-off events. [2022-11-16 12:49:34,425 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-16 12:49:34,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 400 events. 0/400 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-16 12:49:34,426 INFO L137 encePairwiseOnDemand]: 415/420 looper letters, 33 selfloop transitions, 31 changer transitions 0/362 dead transitions. [2022-11-16 12:49:34,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 362 transitions, 1126 flow [2022-11-16 12:49:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:49:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 12:49:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10826 transitions. [2022-11-16 12:49:34,434 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7810966810966811 [2022-11-16 12:49:34,434 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10826 transitions. [2022-11-16 12:49:34,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10826 transitions. [2022-11-16 12:49:34,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:34,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10826 transitions. [2022-11-16 12:49:34,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 328.06060606060606) internal successors, (10826), 33 states have internal predecessors, (10826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:34,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 420.0) internal successors, (14280), 34 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:34,462 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 420.0) internal successors, (14280), 34 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:34,463 INFO L175 Difference]: Start difference. First operand has 384 places, 345 transitions, 884 flow. Second operand 33 states and 10826 transitions. [2022-11-16 12:49:34,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 362 transitions, 1126 flow [2022-11-16 12:49:34,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 362 transitions, 1060 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-16 12:49:34,471 INFO L231 Difference]: Finished difference. Result has 393 places, 344 transitions, 921 flow [2022-11-16 12:49:34,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=921, PETRI_PLACES=393, PETRI_TRANSITIONS=344} [2022-11-16 12:49:34,472 INFO L288 CegarLoopForPetriNet]: 366 programPoint places, 27 predicate places. [2022-11-16 12:49:34,472 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 344 transitions, 921 flow [2022-11-16 12:49:34,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 328.79411764705884) internal successors, (11179), 34 states have internal predecessors, (11179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:34,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:34,475 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:34,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 12:49:34,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61dbbee1-9863-468a-9630-9ac86cfe9de6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 12:49:34,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1479336987, now seen corresponding path program 1 times [2022-11-16 12:49:34,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:34,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020485251] [2022-11-16 12:49:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:34,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:49:34,708 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:49:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:49:34,751 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:49:34,751 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:49:34,751 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-16 12:49:34,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 12:49:34,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-16 12:49:34,752 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 12:49:34,752 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:49:34,752 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-16 12:49:34,794 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-11-16 12:49:34,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 454 transitions, 1106 flow