./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa --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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:12:27,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:12:27,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:12:27,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:12:27,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:12:27,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:12:27,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:12:27,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:12:27,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:12:27,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:12:27,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:12:27,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:12:27,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:12:27,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:12:27,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:12:27,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:12:27,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:12:27,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:12:27,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:12:27,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:12:27,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:12:27,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:12:27,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:12:27,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:12:27,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:12:27,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:12:27,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:12:27,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:12:27,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:12:27,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:12:27,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:12:27,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:12:27,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:12:27,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:12:27,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:12:27,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:12:27,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:12:27,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:12:27,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:12:27,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:12:27,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:12:27,599 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:12:27,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:12:27,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:12:27,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:12:27,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:12:27,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:12:27,621 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:12:27,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:12:27,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:12:27,621 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:12:27,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:12:27,622 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:12:27,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:12:27,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:12:27,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:12:27,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:12:27,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:12:27,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:12:27,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:12:27,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:12:27,623 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:12:27,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:12:27,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:12:27,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:12:27,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:12:27,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:12:27,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:12:27,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:12:27,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:12:27,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:12:27,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:12:27,624 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:12:27,624 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:12:27,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:12:27,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:12:27,624 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_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2021-12-06 17:12:27,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:12:27,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:12:27,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:12:27,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:12:27,850 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:12:27,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2021-12-06 17:12:27,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/data/7a97c6c39/1e4c36960f77489bbffa1fdb259d0304/FLAGa087911cc [2021-12-06 17:12:28,252 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:12:28,252 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2021-12-06 17:12:28,258 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/data/7a97c6c39/1e4c36960f77489bbffa1fdb259d0304/FLAGa087911cc [2021-12-06 17:12:28,269 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/data/7a97c6c39/1e4c36960f77489bbffa1fdb259d0304 [2021-12-06 17:12:28,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:12:28,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:12:28,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:12:28,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:12:28,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:12:28,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f5b5b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28, skipping insertion in model container [2021-12-06 17:12:28,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:12:28,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:12:28,414 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2021-12-06 17:12:28,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:12:28,421 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:12:28,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2021-12-06 17:12:28,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:12:28,446 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:12:28,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28 WrapperNode [2021-12-06 17:12:28,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:12:28,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:12:28,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:12:28,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:12:28,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,472 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2021-12-06 17:12:28,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:12:28,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:12:28,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:12:28,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:12:28,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:12:28,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:12:28,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:12:28,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:12:28,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (1/1) ... [2021-12-06 17:12:28,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:12:28,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:28,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:12:28,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:12:28,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:12:28,547 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 17:12:28,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 17:12:28,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 17:12:28,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 17:12:28,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:12:28,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:12:28,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:12:28,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 17:12:28,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 17:12:28,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:12:28,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:12:28,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:12:28,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:12:28,549 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 17:12:28,607 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:12:28,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:12:28,714 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:12:28,734 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:12:28,735 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:12:28,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:12:28 BoogieIcfgContainer [2021-12-06 17:12:28,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:12:28,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:12:28,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:12:28,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:12:28,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:12:28" (1/3) ... [2021-12-06 17:12:28,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c5d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:12:28, skipping insertion in model container [2021-12-06 17:12:28,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:12:28" (2/3) ... [2021-12-06 17:12:28,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c5d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:12:28, skipping insertion in model container [2021-12-06 17:12:28,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:12:28" (3/3) ... [2021-12-06 17:12:28,742 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2021-12-06 17:12:28,752 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 17:12:28,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:12:28,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:12:28,752 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 17:12:28,783 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,783 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,783 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,784 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,784 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,784 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,785 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,785 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,785 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,785 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,785 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,786 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,786 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,786 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,786 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,786 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,786 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,787 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,787 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,787 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,787 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,788 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,788 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,788 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,788 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,789 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,789 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,789 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,789 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,789 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,789 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,790 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,790 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,790 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,790 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,791 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,792 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,795 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,795 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,795 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,795 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,797 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,797 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,797 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,797 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,797 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,797 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:12:28,800 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 17:12:28,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:12:28,843 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:12:28,844 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 17:12:28,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2021-12-06 17:12:28,886 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2021-12-06 17:12:28,886 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 17:12:28,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2021-12-06 17:12:28,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2021-12-06 17:12:28,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2021-12-06 17:12:28,910 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2021-12-06 17:12:28,910 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 17:12:28,910 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:28,911 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:28,911 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1603327647, now seen corresponding path program 1 times [2021-12-06 17:12:28,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:28,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480774488] [2021-12-06 17:12:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:28,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:29,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:29,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480774488] [2021-12-06 17:12:29,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480774488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:12:29,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:12:29,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:12:29,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846714135] [2021-12-06 17:12:29,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:12:29,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:12:29,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:12:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:12:29,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 87 [2021-12-06 17:12:29,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:29,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 87 [2021-12-06 17:12:29,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:29,122 INFO L129 PetriNetUnfolder]: 5/83 cut-off events. [2021-12-06 17:12:29,122 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-12-06 17:12:29,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 83 events. 5/83 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 1 based on Foata normal form. 8/85 useless extension candidates. Maximal degree in co-relation 49. Up to 10 conditions per place. [2021-12-06 17:12:29,124 INFO L132 encePairwiseOnDemand]: 83/87 looper letters, 5 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2021-12-06 17:12:29,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 166 flow [2021-12-06 17:12:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:12:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 17:12:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2021-12-06 17:12:29,134 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9367816091954023 [2021-12-06 17:12:29,134 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2021-12-06 17:12:29,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2021-12-06 17:12:29,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:29,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2021-12-06 17:12:29,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,143 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,145 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 163 transitions. [2021-12-06 17:12:29,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 166 flow [2021-12-06 17:12:29,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 17:12:29,151 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2021-12-06 17:12:29,152 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2021-12-06 17:12:29,155 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2021-12-06 17:12:29,155 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2021-12-06 17:12:29,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,155 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:29,156 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:29,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:12:29,156 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash 653583360, now seen corresponding path program 1 times [2021-12-06 17:12:29,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:29,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631063899] [2021-12-06 17:12:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:29,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:29,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:29,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631063899] [2021-12-06 17:12:29,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631063899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:12:29,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:12:29,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:12:29,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482227586] [2021-12-06 17:12:29,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:12:29,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:12:29,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:12:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:12:29,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-06 17:12:29,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:29,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-06 17:12:29,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:29,359 INFO L129 PetriNetUnfolder]: 8/111 cut-off events. [2021-12-06 17:12:29,359 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2021-12-06 17:12:29,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 111 events. 8/111 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 1 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 144. Up to 19 conditions per place. [2021-12-06 17:12:29,361 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 2 changer transitions 5/77 dead transitions. [2021-12-06 17:12:29,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 205 flow [2021-12-06 17:12:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:12:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 17:12:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2021-12-06 17:12:29,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8022988505747126 [2021-12-06 17:12:29,366 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2021-12-06 17:12:29,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2021-12-06 17:12:29,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:29,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2021-12-06 17:12:29,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,374 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,374 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 5 states and 349 transitions. [2021-12-06 17:12:29,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 205 flow [2021-12-06 17:12:29,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 17:12:29,377 INFO L242 Difference]: Finished difference. Result has 79 places, 71 transitions, 162 flow [2021-12-06 17:12:29,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2021-12-06 17:12:29,378 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2021-12-06 17:12:29,379 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 162 flow [2021-12-06 17:12:29,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:29,379 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:29,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:12:29,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:29,380 INFO L85 PathProgramCache]: Analyzing trace with hash -824748536, now seen corresponding path program 1 times [2021-12-06 17:12:29,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:29,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477846398] [2021-12-06 17:12:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:29,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:29,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477846398] [2021-12-06 17:12:29,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477846398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:29,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848379133] [2021-12-06 17:12:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:29,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:29,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:29,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:29,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:12:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:29,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:12:29,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:29,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:29,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848379133] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:29,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:12:29,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2021-12-06 17:12:29,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45313124] [2021-12-06 17:12:29,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:12:29,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:12:29,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:12:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:12:29,856 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2021-12-06 17:12:29,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 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) [2021-12-06 17:12:29,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:29,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2021-12-06 17:12:29,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:29,916 INFO L129 PetriNetUnfolder]: 42/189 cut-off events. [2021-12-06 17:12:29,916 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-06 17:12:29,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 189 events. 42/189 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 706 event pairs, 12 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 300. Up to 38 conditions per place. [2021-12-06 17:12:29,919 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 18 selfloop transitions, 5 changer transitions 3/83 dead transitions. [2021-12-06 17:12:29,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 242 flow [2021-12-06 17:12:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:12:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 17:12:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2021-12-06 17:12:29,923 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2021-12-06 17:12:29,923 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2021-12-06 17:12:29,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2021-12-06 17:12:29,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:29,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2021-12-06 17:12:29,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,928 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:29,928 INFO L186 Difference]: Start difference. First operand has 79 places, 71 transitions, 162 flow. Second operand 4 states and 299 transitions. [2021-12-06 17:12:29,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 242 flow [2021-12-06 17:12:29,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 236 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-06 17:12:29,932 INFO L242 Difference]: Finished difference. Result has 80 places, 75 transitions, 192 flow [2021-12-06 17:12:29,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2021-12-06 17:12:29,933 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2021-12-06 17:12:29,933 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 192 flow [2021-12-06 17:12:29,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 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) [2021-12-06 17:12:29,934 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:29,934 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:29,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:12:30,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:30,137 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:30,139 INFO L85 PathProgramCache]: Analyzing trace with hash 565393570, now seen corresponding path program 2 times [2021-12-06 17:12:30,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821202690] [2021-12-06 17:12:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:30,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:30,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:30,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821202690] [2021-12-06 17:12:30,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821202690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:12:30,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:12:30,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:12:30,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086231929] [2021-12-06 17:12:30,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:12:30,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:12:30,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:12:30,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:12:30,328 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-06 17:12:30,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:30,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:30,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-06 17:12:30,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:30,420 INFO L129 PetriNetUnfolder]: 85/313 cut-off events. [2021-12-06 17:12:30,420 INFO L130 PetriNetUnfolder]: For 115/124 co-relation queries the response was YES. [2021-12-06 17:12:30,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 313 events. 85/313 cut-off events. For 115/124 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1507 event pairs, 28 based on Foata normal form. 7/313 useless extension candidates. Maximal degree in co-relation 637. Up to 107 conditions per place. [2021-12-06 17:12:30,423 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 38 selfloop transitions, 8 changer transitions 11/111 dead transitions. [2021-12-06 17:12:30,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 438 flow [2021-12-06 17:12:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:12:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 17:12:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 441 transitions. [2021-12-06 17:12:30,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448275862068966 [2021-12-06 17:12:30,426 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 441 transitions. [2021-12-06 17:12:30,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 441 transitions. [2021-12-06 17:12:30,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:30,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 441 transitions. [2021-12-06 17:12:30,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:30,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:30,430 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:30,430 INFO L186 Difference]: Start difference. First operand has 80 places, 75 transitions, 192 flow. Second operand 6 states and 441 transitions. [2021-12-06 17:12:30,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 438 flow [2021-12-06 17:12:30,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 17:12:30,434 INFO L242 Difference]: Finished difference. Result has 89 places, 82 transitions, 268 flow [2021-12-06 17:12:30,434 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2021-12-06 17:12:30,435 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2021-12-06 17:12:30,435 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 268 flow [2021-12-06 17:12:30,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:30,435 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:30,436 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:30,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:12:30,436 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:30,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1895955256, now seen corresponding path program 3 times [2021-12-06 17:12:30,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:30,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367756572] [2021-12-06 17:12:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:30,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:30,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:30,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367756572] [2021-12-06 17:12:30,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367756572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:30,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584786701] [2021-12-06 17:12:30,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:12:30,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:30,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:30,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:12:30,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 17:12:30,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:12:30,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:12:30,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:30,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:30,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584786701] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:30,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:30,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-12-06 17:12:30,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328262985] [2021-12-06 17:12:30,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:30,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:12:30,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:30,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:12:30,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:12:30,814 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-06 17:12:30,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 82 transitions, 268 flow. Second operand has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 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) [2021-12-06 17:12:30,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:30,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-06 17:12:30,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:30,959 INFO L129 PetriNetUnfolder]: 111/369 cut-off events. [2021-12-06 17:12:30,960 INFO L130 PetriNetUnfolder]: For 348/348 co-relation queries the response was YES. [2021-12-06 17:12:30,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 369 events. 111/369 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1628 event pairs, 19 based on Foata normal form. 9/371 useless extension candidates. Maximal degree in co-relation 931. Up to 83 conditions per place. [2021-12-06 17:12:30,963 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 47 selfloop transitions, 20 changer transitions 2/123 dead transitions. [2021-12-06 17:12:30,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 594 flow [2021-12-06 17:12:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:12:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 17:12:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 578 transitions. [2021-12-06 17:12:30,965 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8304597701149425 [2021-12-06 17:12:30,966 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 578 transitions. [2021-12-06 17:12:30,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 578 transitions. [2021-12-06 17:12:30,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:30,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 578 transitions. [2021-12-06 17:12:30,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.25) internal successors, (578), 8 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:30,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:30,970 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:30,970 INFO L186 Difference]: Start difference. First operand has 89 places, 82 transitions, 268 flow. Second operand 8 states and 578 transitions. [2021-12-06 17:12:30,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 594 flow [2021-12-06 17:12:30,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 588 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-12-06 17:12:30,983 INFO L242 Difference]: Finished difference. Result has 99 places, 93 transitions, 427 flow [2021-12-06 17:12:30,983 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2021-12-06 17:12:30,984 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 22 predicate places. [2021-12-06 17:12:30,984 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 427 flow [2021-12-06 17:12:30,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 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) [2021-12-06 17:12:30,985 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:30,985 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:31,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:12:31,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:31,186 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2095100888, now seen corresponding path program 4 times [2021-12-06 17:12:31,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:31,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487913613] [2021-12-06 17:12:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:31,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:31,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487913613] [2021-12-06 17:12:31,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487913613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:12:31,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:12:31,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:12:31,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795760182] [2021-12-06 17:12:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:12:31,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:12:31,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:12:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:12:31,242 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-06 17:12:31,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 427 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:31,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-06 17:12:31,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:31,333 INFO L129 PetriNetUnfolder]: 110/332 cut-off events. [2021-12-06 17:12:31,333 INFO L130 PetriNetUnfolder]: For 773/775 co-relation queries the response was YES. [2021-12-06 17:12:31,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 332 events. 110/332 cut-off events. For 773/775 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1380 event pairs, 40 based on Foata normal form. 2/327 useless extension candidates. Maximal degree in co-relation 1046. Up to 120 conditions per place. [2021-12-06 17:12:31,337 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 9 changer transitions 2/102 dead transitions. [2021-12-06 17:12:31,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 102 transitions, 570 flow [2021-12-06 17:12:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:12:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 17:12:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 421 transitions. [2021-12-06 17:12:31,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8065134099616859 [2021-12-06 17:12:31,339 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 421 transitions. [2021-12-06 17:12:31,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 421 transitions. [2021-12-06 17:12:31,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:31,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 421 transitions. [2021-12-06 17:12:31,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.16666666666667) internal successors, (421), 6 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,342 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,342 INFO L186 Difference]: Start difference. First operand has 99 places, 93 transitions, 427 flow. Second operand 6 states and 421 transitions. [2021-12-06 17:12:31,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 102 transitions, 570 flow [2021-12-06 17:12:31,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 550 flow, removed 10 selfloop flow, removed 1 redundant places. [2021-12-06 17:12:31,349 INFO L242 Difference]: Finished difference. Result has 105 places, 93 transitions, 440 flow [2021-12-06 17:12:31,349 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=440, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2021-12-06 17:12:31,350 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 28 predicate places. [2021-12-06 17:12:31,350 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 440 flow [2021-12-06 17:12:31,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,350 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:31,350 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:31,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:12:31,350 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:31,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1438588188, now seen corresponding path program 1 times [2021-12-06 17:12:31,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:31,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844279595] [2021-12-06 17:12:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:31,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:31,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844279595] [2021-12-06 17:12:31,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844279595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543013466] [2021-12-06 17:12:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:31,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:31,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:31,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:31,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:12:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:31,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:12:31,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:12:31,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:12:31,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543013466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:31,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:31,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2021-12-06 17:12:31,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040108128] [2021-12-06 17:12:31,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:31,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:12:31,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:31,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:12:31,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:12:31,722 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:12:31,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 440 flow. Second operand has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:31,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:12:31,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:31,818 INFO L129 PetriNetUnfolder]: 61/380 cut-off events. [2021-12-06 17:12:31,818 INFO L130 PetriNetUnfolder]: For 829/850 co-relation queries the response was YES. [2021-12-06 17:12:31,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 380 events. 61/380 cut-off events. For 829/850 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1898 event pairs, 13 based on Foata normal form. 11/384 useless extension candidates. Maximal degree in co-relation 967. Up to 45 conditions per place. [2021-12-06 17:12:31,822 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 22 selfloop transitions, 7 changer transitions 5/109 dead transitions. [2021-12-06 17:12:31,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 109 transitions, 552 flow [2021-12-06 17:12:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:12:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 17:12:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2021-12-06 17:12:31,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2021-12-06 17:12:31,824 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2021-12-06 17:12:31,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2021-12-06 17:12:31,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:31,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2021-12-06 17:12:31,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,827 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,827 INFO L186 Difference]: Start difference. First operand has 105 places, 93 transitions, 440 flow. Second operand 7 states and 476 transitions. [2021-12-06 17:12:31,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 109 transitions, 552 flow [2021-12-06 17:12:31,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 518 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-12-06 17:12:31,831 INFO L242 Difference]: Finished difference. Result has 107 places, 96 transitions, 454 flow [2021-12-06 17:12:31,832 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=107, PETRI_TRANSITIONS=96} [2021-12-06 17:12:31,832 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2021-12-06 17:12:31,832 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 96 transitions, 454 flow [2021-12-06 17:12:31,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:31,833 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:31,833 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:31,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:12:32,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:32,035 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:32,037 INFO L85 PathProgramCache]: Analyzing trace with hash -664902924, now seen corresponding path program 2 times [2021-12-06 17:12:32,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:32,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460951050] [2021-12-06 17:12:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:32,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:32,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:32,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460951050] [2021-12-06 17:12:32,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460951050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:32,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040640680] [2021-12-06 17:12:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:12:32,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:32,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:32,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:32,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:12:32,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:12:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:12:32,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:12:32,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:32,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:32,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040640680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:32,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:32,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-06 17:12:32,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601371731] [2021-12-06 17:12:32,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:32,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:12:32,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:32,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:12:32,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:12:32,696 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:12:32,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 454 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:32,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:32,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:12:32,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:33,407 INFO L129 PetriNetUnfolder]: 343/992 cut-off events. [2021-12-06 17:12:33,407 INFO L130 PetriNetUnfolder]: For 2196/2202 co-relation queries the response was YES. [2021-12-06 17:12:33,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 992 events. 343/992 cut-off events. For 2196/2202 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6084 event pairs, 60 based on Foata normal form. 5/992 useless extension candidates. Maximal degree in co-relation 3146. Up to 170 conditions per place. [2021-12-06 17:12:33,416 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 89 selfloop transitions, 46 changer transitions 9/198 dead transitions. [2021-12-06 17:12:33,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 198 transitions, 1378 flow [2021-12-06 17:12:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:12:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-06 17:12:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1556 transitions. [2021-12-06 17:12:33,420 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7776111944027986 [2021-12-06 17:12:33,420 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1556 transitions. [2021-12-06 17:12:33,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1556 transitions. [2021-12-06 17:12:33,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:33,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1556 transitions. [2021-12-06 17:12:33,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.65217391304348) internal successors, (1556), 23 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:33,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:33,429 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:33,429 INFO L186 Difference]: Start difference. First operand has 107 places, 96 transitions, 454 flow. Second operand 23 states and 1556 transitions. [2021-12-06 17:12:33,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 198 transitions, 1378 flow [2021-12-06 17:12:33,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 198 transitions, 1352 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-12-06 17:12:33,436 INFO L242 Difference]: Finished difference. Result has 138 places, 128 transitions, 865 flow [2021-12-06 17:12:33,436 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=865, PETRI_PLACES=138, PETRI_TRANSITIONS=128} [2021-12-06 17:12:33,437 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 61 predicate places. [2021-12-06 17:12:33,437 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 128 transitions, 865 flow [2021-12-06 17:12:33,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:33,438 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:33,438 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:33,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:12:33,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 17:12:33,639 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1281276886, now seen corresponding path program 3 times [2021-12-06 17:12:33,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:33,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768070600] [2021-12-06 17:12:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:33,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:33,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768070600] [2021-12-06 17:12:33,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768070600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102632354] [2021-12-06 17:12:33,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:12:33,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:33,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:33,728 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:33,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:12:33,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:12:33,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:12:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:12:33,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:33,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:34,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102632354] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:34,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:34,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-06 17:12:34,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874129072] [2021-12-06 17:12:34,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:34,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:12:34,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:12:34,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:12:34,058 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:12:34,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 128 transitions, 865 flow. Second operand has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:34,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:34,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:12:34,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:35,146 INFO L129 PetriNetUnfolder]: 510/1339 cut-off events. [2021-12-06 17:12:35,146 INFO L130 PetriNetUnfolder]: For 5950/5958 co-relation queries the response was YES. [2021-12-06 17:12:35,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5665 conditions, 1339 events. 510/1339 cut-off events. For 5950/5958 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8575 event pairs, 25 based on Foata normal form. 22/1352 useless extension candidates. Maximal degree in co-relation 5633. Up to 143 conditions per place. [2021-12-06 17:12:35,161 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 132 selfloop transitions, 174 changer transitions 12/372 dead transitions. [2021-12-06 17:12:35,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 372 transitions, 3609 flow [2021-12-06 17:12:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 17:12:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-06 17:12:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3173 transitions. [2021-12-06 17:12:35,169 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7759843482514062 [2021-12-06 17:12:35,169 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3173 transitions. [2021-12-06 17:12:35,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3173 transitions. [2021-12-06 17:12:35,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:35,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3173 transitions. [2021-12-06 17:12:35,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.51063829787235) internal successors, (3173), 47 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:35,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:35,186 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:35,187 INFO L186 Difference]: Start difference. First operand has 138 places, 128 transitions, 865 flow. Second operand 47 states and 3173 transitions. [2021-12-06 17:12:35,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 372 transitions, 3609 flow [2021-12-06 17:12:35,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 372 transitions, 3318 flow, removed 110 selfloop flow, removed 10 redundant places. [2021-12-06 17:12:35,208 INFO L242 Difference]: Finished difference. Result has 186 places, 264 transitions, 2469 flow [2021-12-06 17:12:35,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2469, PETRI_PLACES=186, PETRI_TRANSITIONS=264} [2021-12-06 17:12:35,209 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 109 predicate places. [2021-12-06 17:12:35,209 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 264 transitions, 2469 flow [2021-12-06 17:12:35,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:35,210 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:35,210 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:35,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:12:35,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:35,411 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:35,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1077969640, now seen corresponding path program 4 times [2021-12-06 17:12:35,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:35,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267121848] [2021-12-06 17:12:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:35,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:35,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:35,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267121848] [2021-12-06 17:12:35,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267121848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:35,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788460589] [2021-12-06 17:12:35,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:12:35,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:35,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:35,605 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:35,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:12:35,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:12:35,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:12:35,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:12:35,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:35,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:35,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788460589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:35,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:35,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 17:12:35,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473625833] [2021-12-06 17:12:35,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:35,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:12:35,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:35,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:12:35,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:12:35,929 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:12:35,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 264 transitions, 2469 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:35,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:35,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:12:35,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:37,406 INFO L129 PetriNetUnfolder]: 709/2014 cut-off events. [2021-12-06 17:12:37,407 INFO L130 PetriNetUnfolder]: For 13737/13746 co-relation queries the response was YES. [2021-12-06 17:12:37,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9587 conditions, 2014 events. 709/2014 cut-off events. For 13737/13746 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15185 event pairs, 7 based on Foata normal form. 10/2017 useless extension candidates. Maximal degree in co-relation 9543. Up to 218 conditions per place. [2021-12-06 17:12:37,430 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 225 selfloop transitions, 264 changer transitions 39/582 dead transitions. [2021-12-06 17:12:37,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 582 transitions, 6856 flow [2021-12-06 17:12:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 17:12:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-12-06 17:12:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4777 transitions. [2021-12-06 17:12:37,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733527602395985 [2021-12-06 17:12:37,447 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4777 transitions. [2021-12-06 17:12:37,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4777 transitions. [2021-12-06 17:12:37,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:37,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4777 transitions. [2021-12-06 17:12:37,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 67.28169014084507) internal successors, (4777), 71 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:37,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:37,475 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:37,475 INFO L186 Difference]: Start difference. First operand has 186 places, 264 transitions, 2469 flow. Second operand 71 states and 4777 transitions. [2021-12-06 17:12:37,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 582 transitions, 6856 flow [2021-12-06 17:12:37,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 582 transitions, 6408 flow, removed 149 selfloop flow, removed 2 redundant places. [2021-12-06 17:12:37,544 INFO L242 Difference]: Finished difference. Result has 277 places, 417 transitions, 4636 flow [2021-12-06 17:12:37,544 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=4636, PETRI_PLACES=277, PETRI_TRANSITIONS=417} [2021-12-06 17:12:37,545 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 200 predicate places. [2021-12-06 17:12:37,545 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 417 transitions, 4636 flow [2021-12-06 17:12:37,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:37,545 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:37,546 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:37,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:12:37,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:12:37,747 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:37,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1322624998, now seen corresponding path program 5 times [2021-12-06 17:12:37,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:37,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690428838] [2021-12-06 17:12:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:37,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:37,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:37,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690428838] [2021-12-06 17:12:37,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690428838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:37,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346400790] [2021-12-06 17:12:37,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:12:37,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:37,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:37,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:37,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:12:37,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:12:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:12:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:12:37,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:38,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:38,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346400790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:38,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:38,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-12-06 17:12:38,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319253882] [2021-12-06 17:12:38,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:38,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:12:38,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:12:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:12:38,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:12:38,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 417 transitions, 4636 flow. Second operand has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:38,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:38,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:12:38,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:40,518 INFO L129 PetriNetUnfolder]: 1218/3588 cut-off events. [2021-12-06 17:12:40,519 INFO L130 PetriNetUnfolder]: For 57806/57820 co-relation queries the response was YES. [2021-12-06 17:12:40,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20377 conditions, 3588 events. 1218/3588 cut-off events. For 57806/57820 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31670 event pairs, 67 based on Foata normal form. 34/3604 useless extension candidates. Maximal degree in co-relation 20309. Up to 430 conditions per place. [2021-12-06 17:12:40,566 INFO L132 encePairwiseOnDemand]: 72/87 looper letters, 251 selfloop transitions, 554 changer transitions 5/864 dead transitions. [2021-12-06 17:12:40,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 864 transitions, 11929 flow [2021-12-06 17:12:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 17:12:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-12-06 17:12:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3657 transitions. [2021-12-06 17:12:40,570 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7784163473818646 [2021-12-06 17:12:40,570 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3657 transitions. [2021-12-06 17:12:40,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3657 transitions. [2021-12-06 17:12:40,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:40,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3657 transitions. [2021-12-06 17:12:40,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 67.72222222222223) internal successors, (3657), 54 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:40,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:40,588 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:40,589 INFO L186 Difference]: Start difference. First operand has 277 places, 417 transitions, 4636 flow. Second operand 54 states and 3657 transitions. [2021-12-06 17:12:40,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 864 transitions, 11929 flow [2021-12-06 17:12:40,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 864 transitions, 10547 flow, removed 608 selfloop flow, removed 6 redundant places. [2021-12-06 17:12:40,812 INFO L242 Difference]: Finished difference. Result has 337 places, 713 transitions, 9140 flow [2021-12-06 17:12:40,813 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=9140, PETRI_PLACES=337, PETRI_TRANSITIONS=713} [2021-12-06 17:12:40,813 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 260 predicate places. [2021-12-06 17:12:40,813 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 713 transitions, 9140 flow [2021-12-06 17:12:40,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:40,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:40,814 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:40,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:12:41,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 17:12:41,016 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1299198750, now seen corresponding path program 6 times [2021-12-06 17:12:41,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:41,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064572055] [2021-12-06 17:12:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:41,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:41,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064572055] [2021-12-06 17:12:41,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064572055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987334122] [2021-12-06 17:12:41,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:12:41,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:41,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:41,150 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:41,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:12:41,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 17:12:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:12:41,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:12:41,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:41,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:41,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987334122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:41,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:41,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 17:12:41,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769465621] [2021-12-06 17:12:41,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:41,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 17:12:41,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 17:12:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:12:41,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:12:41,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 713 transitions, 9140 flow. Second operand has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:41,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:41,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:12:41,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:45,027 INFO L129 PetriNetUnfolder]: 1744/5140 cut-off events. [2021-12-06 17:12:45,027 INFO L130 PetriNetUnfolder]: For 87893/87911 co-relation queries the response was YES. [2021-12-06 17:12:45,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30648 conditions, 5140 events. 1744/5140 cut-off events. For 87893/87911 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 49796 event pairs, 53 based on Foata normal form. 36/5152 useless extension candidates. Maximal degree in co-relation 30564. Up to 665 conditions per place. [2021-12-06 17:12:45,108 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 255 selfloop transitions, 887 changer transitions 11/1207 dead transitions. [2021-12-06 17:12:45,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1207 transitions, 18397 flow [2021-12-06 17:12:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-06 17:12:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-12-06 17:12:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 7221 transitions. [2021-12-06 17:12:45,114 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2021-12-06 17:12:45,115 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 7221 transitions. [2021-12-06 17:12:45,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 7221 transitions. [2021-12-06 17:12:45,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:45,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 7221 transitions. [2021-12-06 17:12:45,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 66.86111111111111) internal successors, (7221), 108 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:45,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:45,134 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:45,134 INFO L186 Difference]: Start difference. First operand has 337 places, 713 transitions, 9140 flow. Second operand 108 states and 7221 transitions. [2021-12-06 17:12:45,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1207 transitions, 18397 flow [2021-12-06 17:12:45,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1207 transitions, 18138 flow, removed 123 selfloop flow, removed 4 redundant places. [2021-12-06 17:12:45,500 INFO L242 Difference]: Finished difference. Result has 471 places, 1049 transitions, 16429 flow [2021-12-06 17:12:45,501 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=9087, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=16429, PETRI_PLACES=471, PETRI_TRANSITIONS=1049} [2021-12-06 17:12:45,501 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 394 predicate places. [2021-12-06 17:12:45,501 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 1049 transitions, 16429 flow [2021-12-06 17:12:45,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:45,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:45,502 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:45,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:12:45,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 17:12:45,703 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1287637296, now seen corresponding path program 7 times [2021-12-06 17:12:45,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:45,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112814126] [2021-12-06 17:12:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:45,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:45,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:45,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112814126] [2021-12-06 17:12:45,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112814126] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645679645] [2021-12-06 17:12:45,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:12:45,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:45,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:45,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:12:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:45,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:12:45,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:45,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:46,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645679645] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:46,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:46,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 17:12:46,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683599047] [2021-12-06 17:12:46,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:46,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:12:46,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:12:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:12:46,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:12:46,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1049 transitions, 16429 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:46,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:46,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:12:46,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:49,961 INFO L129 PetriNetUnfolder]: 2332/6723 cut-off events. [2021-12-06 17:12:49,961 INFO L130 PetriNetUnfolder]: For 149849/149865 co-relation queries the response was YES. [2021-12-06 17:12:50,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45589 conditions, 6723 events. 2332/6723 cut-off events. For 149849/149865 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 68695 event pairs, 88 based on Foata normal form. 36/6731 useless extension candidates. Maximal degree in co-relation 45475. Up to 854 conditions per place. [2021-12-06 17:12:50,060 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 282 selfloop transitions, 1271 changer transitions 6/1613 dead transitions. [2021-12-06 17:12:50,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1613 transitions, 28646 flow [2021-12-06 17:12:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 17:12:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-12-06 17:12:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5263 transitions. [2021-12-06 17:12:50,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7657500363742179 [2021-12-06 17:12:50,065 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5263 transitions. [2021-12-06 17:12:50,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5263 transitions. [2021-12-06 17:12:50,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:50,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5263 transitions. [2021-12-06 17:12:50,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.62025316455696) internal successors, (5263), 79 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:50,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:50,095 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:50,095 INFO L186 Difference]: Start difference. First operand has 471 places, 1049 transitions, 16429 flow. Second operand 79 states and 5263 transitions. [2021-12-06 17:12:50,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1613 transitions, 28646 flow [2021-12-06 17:12:51,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1613 transitions, 27473 flow, removed 291 selfloop flow, removed 30 redundant places. [2021-12-06 17:12:51,155 INFO L242 Difference]: Finished difference. Result has 552 places, 1519 transitions, 27372 flow [2021-12-06 17:12:51,156 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15527, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=802, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=27372, PETRI_PLACES=552, PETRI_TRANSITIONS=1519} [2021-12-06 17:12:51,156 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 475 predicate places. [2021-12-06 17:12:51,156 INFO L470 AbstractCegarLoop]: Abstraction has has 552 places, 1519 transitions, 27372 flow [2021-12-06 17:12:51,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:51,157 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:12:51,157 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:51,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 17:12:51,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 17:12:51,359 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:12:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:51,360 INFO L85 PathProgramCache]: Analyzing trace with hash 41325334, now seen corresponding path program 8 times [2021-12-06 17:12:51,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:51,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537473816] [2021-12-06 17:12:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:51,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:51,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:51,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537473816] [2021-12-06 17:12:51,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537473816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:51,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773144997] [2021-12-06 17:12:51,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:12:51,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:51,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:51,482 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:51,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:12:51,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:12:51,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:12:51,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:12:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:51,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:51,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773144997] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:51,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:51,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 17:12:51,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158594975] [2021-12-06 17:12:51,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:51,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:12:51,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:12:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:12:51,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:12:51,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1519 transitions, 27372 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:51,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:12:51,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:12:51,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:12:58,454 INFO L129 PetriNetUnfolder]: 3627/10432 cut-off events. [2021-12-06 17:12:58,454 INFO L130 PetriNetUnfolder]: For 268855/268873 co-relation queries the response was YES. [2021-12-06 17:12:58,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77244 conditions, 10432 events. 3627/10432 cut-off events. For 268855/268873 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 114513 event pairs, 307 based on Foata normal form. 16/10297 useless extension candidates. Maximal degree in co-relation 77101. Up to 1646 conditions per place. [2021-12-06 17:12:58,674 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 866 selfloop transitions, 1692 changer transitions 6/2618 dead transitions. [2021-12-06 17:12:58,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 2618 transitions, 53706 flow [2021-12-06 17:12:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-06 17:12:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-12-06 17:12:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 6267 transitions. [2021-12-06 17:12:58,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7663242846661775 [2021-12-06 17:12:58,680 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 6267 transitions. [2021-12-06 17:12:58,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 6267 transitions. [2021-12-06 17:12:58,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:12:58,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 6267 transitions. [2021-12-06 17:12:58,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 66.67021276595744) internal successors, (6267), 94 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:58,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:58,695 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 87.0) internal successors, (8265), 95 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:58,695 INFO L186 Difference]: Start difference. First operand has 552 places, 1519 transitions, 27372 flow. Second operand 94 states and 6267 transitions. [2021-12-06 17:12:58,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 2618 transitions, 53706 flow [2021-12-06 17:13:01,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 2618 transitions, 53459 flow, removed 49 selfloop flow, removed 13 redundant places. [2021-12-06 17:13:01,701 INFO L242 Difference]: Finished difference. Result has 662 places, 2435 transitions, 51170 flow [2021-12-06 17:13:01,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=27165, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=51170, PETRI_PLACES=662, PETRI_TRANSITIONS=2435} [2021-12-06 17:13:01,703 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 585 predicate places. [2021-12-06 17:13:01,703 INFO L470 AbstractCegarLoop]: Abstraction has has 662 places, 2435 transitions, 51170 flow [2021-12-06 17:13:01,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:01,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:13:01,703 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:13:01,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:13:01,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:13:01,905 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:13:01,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:13:01,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1361762118, now seen corresponding path program 9 times [2021-12-06 17:13:01,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:13:01,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351927515] [2021-12-06 17:13:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:13:01,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:13:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:13:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:13:02,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:13:02,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351927515] [2021-12-06 17:13:02,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351927515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:13:02,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474326356] [2021-12-06 17:13:02,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:13:02,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:13:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:13:02,021 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:13:02,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:13:02,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:13:02,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:13:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:13:02,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:13:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:13:02,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:13:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:13:02,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474326356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:13:02,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:13:02,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 17:13:02,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335825375] [2021-12-06 17:13:02,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:13:02,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:13:02,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:13:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:13:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:13:02,339 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:13:02,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 2435 transitions, 51170 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:02,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:13:02,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:13:02,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:13:12,522 INFO L129 PetriNetUnfolder]: 4556/13004 cut-off events. [2021-12-06 17:13:12,522 INFO L130 PetriNetUnfolder]: For 431492/431524 co-relation queries the response was YES. [2021-12-06 17:13:12,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108838 conditions, 13004 events. 4556/13004 cut-off events. For 431492/431524 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 147728 event pairs, 381 based on Foata normal form. 15/12822 useless extension candidates. Maximal degree in co-relation 108666. Up to 2428 conditions per place. [2021-12-06 17:13:12,840 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 1162 selfloop transitions, 1811 changer transitions 6/3033 dead transitions. [2021-12-06 17:13:12,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 3033 transitions, 70163 flow [2021-12-06 17:13:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 17:13:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-06 17:13:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3864 transitions. [2021-12-06 17:13:12,845 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779189352692075 [2021-12-06 17:13:12,845 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3864 transitions. [2021-12-06 17:13:12,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3864 transitions. [2021-12-06 17:13:12,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:13:12,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3864 transitions. [2021-12-06 17:13:12,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 67.78947368421052) internal successors, (3864), 57 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:12,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:12,856 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:12,857 INFO L186 Difference]: Start difference. First operand has 662 places, 2435 transitions, 51170 flow. Second operand 57 states and 3864 transitions. [2021-12-06 17:13:12,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 3033 transitions, 70163 flow [2021-12-06 17:13:21,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 3033 transitions, 67424 flow, removed 1358 selfloop flow, removed 3 redundant places. [2021-12-06 17:13:22,002 INFO L242 Difference]: Finished difference. Result has 732 places, 2863 transitions, 64007 flow [2021-12-06 17:13:22,004 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=49313, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=64007, PETRI_PLACES=732, PETRI_TRANSITIONS=2863} [2021-12-06 17:13:22,004 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 655 predicate places. [2021-12-06 17:13:22,004 INFO L470 AbstractCegarLoop]: Abstraction has has 732 places, 2863 transitions, 64007 flow [2021-12-06 17:13:22,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:22,005 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:13:22,005 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:13:22,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 17:13:22,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 17:13:22,206 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:13:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:13:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1238803636, now seen corresponding path program 10 times [2021-12-06 17:13:22,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:13:22,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618360622] [2021-12-06 17:13:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:13:22,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:13:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:13:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:13:22,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:13:22,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618360622] [2021-12-06 17:13:22,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618360622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:13:22,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152562683] [2021-12-06 17:13:22,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:13:22,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:13:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:13:22,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:13:22,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:13:22,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:13:22,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:13:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:13:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:13:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:13:22,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:13:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:13:22,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152562683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:13:22,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:13:22,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 17:13:22,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834967823] [2021-12-06 17:13:22,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:13:22,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:13:22,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:13:22,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:13:22,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:13:22,532 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:13:22,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 2863 transitions, 64007 flow. Second operand has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:22,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:13:22,533 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:13:22,533 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:13:37,007 INFO L129 PetriNetUnfolder]: 4829/13945 cut-off events. [2021-12-06 17:13:37,008 INFO L130 PetriNetUnfolder]: For 411844/411880 co-relation queries the response was YES. [2021-12-06 17:13:37,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117434 conditions, 13945 events. 4829/13945 cut-off events. For 411844/411880 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 161731 event pairs, 433 based on Foata normal form. 43/13788 useless extension candidates. Maximal degree in co-relation 117243. Up to 1944 conditions per place. [2021-12-06 17:13:37,323 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 631 selfloop transitions, 2562 changer transitions 1/3248 dead transitions. [2021-12-06 17:13:37,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 3248 transitions, 78226 flow [2021-12-06 17:13:37,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-12-06 17:13:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-12-06 17:13:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8662 transitions. [2021-12-06 17:13:37,333 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7658709106984969 [2021-12-06 17:13:37,333 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8662 transitions. [2021-12-06 17:13:37,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8662 transitions. [2021-12-06 17:13:37,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:13:37,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8662 transitions. [2021-12-06 17:13:37,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.63076923076923) internal successors, (8662), 130 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:37,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:37,360 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:37,360 INFO L186 Difference]: Start difference. First operand has 732 places, 2863 transitions, 64007 flow. Second operand 130 states and 8662 transitions. [2021-12-06 17:13:37,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 3248 transitions, 78226 flow [2021-12-06 17:13:44,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 3248 transitions, 77693 flow, removed 232 selfloop flow, removed 8 redundant places. [2021-12-06 17:13:44,703 INFO L242 Difference]: Finished difference. Result has 876 places, 3104 transitions, 76734 flow [2021-12-06 17:13:44,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=63474, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=76734, PETRI_PLACES=876, PETRI_TRANSITIONS=3104} [2021-12-06 17:13:44,706 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 799 predicate places. [2021-12-06 17:13:44,706 INFO L470 AbstractCegarLoop]: Abstraction has has 876 places, 3104 transitions, 76734 flow [2021-12-06 17:13:44,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:44,706 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:13:44,706 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:13:44,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 17:13:44,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 17:13:44,908 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:13:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:13:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash 262790282, now seen corresponding path program 11 times [2021-12-06 17:13:44,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:13:44,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102612827] [2021-12-06 17:13:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:13:44,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:13:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:13:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:13:45,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:13:45,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102612827] [2021-12-06 17:13:45,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102612827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:13:45,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254521752] [2021-12-06 17:13:45,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:13:45,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:13:45,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:13:45,043 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:13:45,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 17:13:45,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:13:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:13:45,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:13:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:13:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:13:45,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:13:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:13:45,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254521752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:13:45,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:13:45,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-06 17:13:45,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863347715] [2021-12-06 17:13:45,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:13:45,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:13:45,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:13:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:13:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:13:45,440 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:13:45,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 876 places, 3104 transitions, 76734 flow. Second operand has 22 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:13:45,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:13:45,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:13:45,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:14:07,835 INFO L129 PetriNetUnfolder]: 7737/22351 cut-off events. [2021-12-06 17:14:07,835 INFO L130 PetriNetUnfolder]: For 773389/773411 co-relation queries the response was YES. [2021-12-06 17:14:08,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197699 conditions, 22351 events. 7737/22351 cut-off events. For 773389/773411 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 278491 event pairs, 768 based on Foata normal form. 17/22033 useless extension candidates. Maximal degree in co-relation 197484. Up to 3287 conditions per place. [2021-12-06 17:14:08,557 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 1809 selfloop transitions, 3057 changer transitions 22/4942 dead transitions. [2021-12-06 17:14:08,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 945 places, 4942 transitions, 131960 flow [2021-12-06 17:14:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 17:14:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-12-06 17:14:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4702 transitions. [2021-12-06 17:14:08,561 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7720853858784893 [2021-12-06 17:14:08,561 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4702 transitions. [2021-12-06 17:14:08,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4702 transitions. [2021-12-06 17:14:08,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:14:08,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4702 transitions. [2021-12-06 17:14:08,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 67.17142857142858) internal successors, (4702), 70 states have internal predecessors, (4702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:14:08,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 87.0) internal successors, (6177), 71 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:14:08,569 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 87.0) internal successors, (6177), 71 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:14:08,569 INFO L186 Difference]: Start difference. First operand has 876 places, 3104 transitions, 76734 flow. Second operand 70 states and 4702 transitions. [2021-12-06 17:14:08,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 945 places, 4942 transitions, 131960 flow [2021-12-06 17:14:24,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 4942 transitions, 129507 flow, removed 285 selfloop flow, removed 59 redundant places. [2021-12-06 17:14:24,161 INFO L242 Difference]: Finished difference. Result has 923 places, 4694 transitions, 128059 flow [2021-12-06 17:14:24,164 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=75105, PETRI_DIFFERENCE_MINUEND_PLACES=817, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1768, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=128059, PETRI_PLACES=923, PETRI_TRANSITIONS=4694} [2021-12-06 17:14:24,164 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 846 predicate places. [2021-12-06 17:14:24,164 INFO L470 AbstractCegarLoop]: Abstraction has has 923 places, 4694 transitions, 128059 flow [2021-12-06 17:14:24,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:14:24,165 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:14:24,165 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:14:24,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 17:14:24,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 17:14:24,367 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:14:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:14:24,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1258186080, now seen corresponding path program 12 times [2021-12-06 17:14:24,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:14:24,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21038129] [2021-12-06 17:14:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:14:24,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:14:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:14:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:14:24,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:14:24,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21038129] [2021-12-06 17:14:24,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21038129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:14:24,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504630197] [2021-12-06 17:14:24,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:14:24,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:14:24,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:14:24,456 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:14:24,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 17:14:24,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 17:14:24,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:14:24,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:14:24,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:14:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:14:24,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:14:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:14:24,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504630197] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:14:24,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:14:24,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 17:14:24,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162464983] [2021-12-06 17:14:24,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:14:24,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:14:24,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:14:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:14:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:14:24,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:14:24,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 923 places, 4694 transitions, 128059 flow. Second operand has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:14:24,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:14:24,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:14:24,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:14:58,795 INFO L129 PetriNetUnfolder]: 8050/23040 cut-off events. [2021-12-06 17:14:58,795 INFO L130 PetriNetUnfolder]: For 1049489/1049543 co-relation queries the response was YES. [2021-12-06 17:14:59,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224860 conditions, 23040 events. 8050/23040 cut-off events. For 1049489/1049543 co-relation queries the response was YES. Maximal size of possible extension queue 1743. Compared 287041 event pairs, 731 based on Foata normal form. 46/22716 useless extension candidates. Maximal degree in co-relation 224613. Up to 3302 conditions per place. [2021-12-06 17:14:59,658 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 995 selfloop transitions, 4020 changer transitions 5/5074 dead transitions. [2021-12-06 17:14:59,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 5074 transitions, 147461 flow [2021-12-06 17:14:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 17:14:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-12-06 17:14:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5583 transitions. [2021-12-06 17:14:59,663 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7731616119651018 [2021-12-06 17:14:59,663 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5583 transitions. [2021-12-06 17:14:59,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5583 transitions. [2021-12-06 17:14:59,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:14:59,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5583 transitions. [2021-12-06 17:14:59,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.26506024096386) internal successors, (5583), 83 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:14:59,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:14:59,673 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:14:59,673 INFO L186 Difference]: Start difference. First operand has 923 places, 4694 transitions, 128059 flow. Second operand 83 states and 5583 transitions. [2021-12-06 17:14:59,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 5074 transitions, 147461 flow [2021-12-06 17:15:20,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 982 places, 5074 transitions, 144531 flow, removed 428 selfloop flow, removed 13 redundant places. [2021-12-06 17:15:20,807 INFO L242 Difference]: Finished difference. Result has 1000 places, 4898 transitions, 144382 flow [2021-12-06 17:15:20,810 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=124810, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=144382, PETRI_PLACES=1000, PETRI_TRANSITIONS=4898} [2021-12-06 17:15:20,811 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 923 predicate places. [2021-12-06 17:15:20,811 INFO L470 AbstractCegarLoop]: Abstraction has has 1000 places, 4898 transitions, 144382 flow [2021-12-06 17:15:20,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.21052631578948) internal successors, (1239), 19 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:15:20,811 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:15:20,811 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:15:20,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 17:15:21,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 17:15:21,013 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:15:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:15:21,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1842044668, now seen corresponding path program 13 times [2021-12-06 17:15:21,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:15:21,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201142283] [2021-12-06 17:15:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:15:21,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:15:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:15:21,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:15:21,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201142283] [2021-12-06 17:15:21,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201142283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:15:21,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422574816] [2021-12-06 17:15:21,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:15:21,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:15:21,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:15:21,120 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:15:21,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 17:15:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:15:21,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:15:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:15:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:15:21,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:15:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:15:21,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422574816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:15:21,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:15:21,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 17:15:21,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765232081] [2021-12-06 17:15:21,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:15:21,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:15:21,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:15:21,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:15:21,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:15:21,385 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:15:21,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1000 places, 4898 transitions, 144382 flow. Second operand has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:15:21,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:15:21,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:15:21,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:16:02,614 INFO L129 PetriNetUnfolder]: 9677/27387 cut-off events. [2021-12-06 17:16:02,614 INFO L130 PetriNetUnfolder]: For 1464590/1464707 co-relation queries the response was YES. [2021-12-06 17:16:03,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 289404 conditions, 27387 events. 9677/27387 cut-off events. For 1464590/1464707 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 348540 event pairs, 826 based on Foata normal form. 76/27016 useless extension candidates. Maximal degree in co-relation 289142. Up to 3970 conditions per place. [2021-12-06 17:16:03,796 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1046 selfloop transitions, 5220 changer transitions 3/6323 dead transitions. [2021-12-06 17:16:03,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1073 places, 6323 transitions, 197765 flow [2021-12-06 17:16:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-06 17:16:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-12-06 17:16:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5028 transitions. [2021-12-06 17:16:03,800 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7705747126436782 [2021-12-06 17:16:03,800 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5028 transitions. [2021-12-06 17:16:03,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5028 transitions. [2021-12-06 17:16:03,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:16:03,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5028 transitions. [2021-12-06 17:16:03,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 67.04) internal successors, (5028), 75 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:03,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:03,808 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:03,808 INFO L186 Difference]: Start difference. First operand has 1000 places, 4898 transitions, 144382 flow. Second operand 75 states and 5028 transitions. [2021-12-06 17:16:03,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1073 places, 6323 transitions, 197765 flow [2021-12-06 17:16:37,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 6323 transitions, 196178 flow, removed 349 selfloop flow, removed 42 redundant places. [2021-12-06 17:16:37,606 INFO L242 Difference]: Finished difference. Result has 1061 places, 6201 transitions, 199570 flow [2021-12-06 17:16:37,610 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=142927, PETRI_DIFFERENCE_MINUEND_PLACES=957, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=199570, PETRI_PLACES=1061, PETRI_TRANSITIONS=6201} [2021-12-06 17:16:37,610 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 984 predicate places. [2021-12-06 17:16:37,610 INFO L470 AbstractCegarLoop]: Abstraction has has 1061 places, 6201 transitions, 199570 flow [2021-12-06 17:16:37,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:37,611 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:16:37,611 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:16:37,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 17:16:37,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:16:37,812 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:16:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:16:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1245142102, now seen corresponding path program 14 times [2021-12-06 17:16:37,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:16:37,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405410740] [2021-12-06 17:16:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:16:37,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:16:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:16:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:37,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:16:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405410740] [2021-12-06 17:16:37,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405410740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:16:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168900731] [2021-12-06 17:16:37,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:16:37,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:16:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:16:37,913 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:16:37,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 17:16:37,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:16:37,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:16:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:16:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:16:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:38,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:16:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:16:38,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168900731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:16:38,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:16:38,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 17:16:38,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885365670] [2021-12-06 17:16:38,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:16:38,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:16:38,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:16:38,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:16:38,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:16:38,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:16:38,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 6201 transitions, 199570 flow. Second operand has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:16:38,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:16:38,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:16:38,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:17:43,278 INFO L129 PetriNetUnfolder]: 11284/31567 cut-off events. [2021-12-06 17:17:43,278 INFO L130 PetriNetUnfolder]: For 1918870/1919002 co-relation queries the response was YES. [2021-12-06 17:17:44,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 358158 conditions, 31567 events. 11284/31567 cut-off events. For 1918870/1919002 co-relation queries the response was YES. Maximal size of possible extension queue 2363. Compared 407731 event pairs, 544 based on Foata normal form. 62/31473 useless extension candidates. Maximal degree in co-relation 357871. Up to 4617 conditions per place. [2021-12-06 17:17:44,858 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1195 selfloop transitions, 6481 changer transitions 17/7747 dead transitions. [2021-12-06 17:17:44,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1193 places, 7747 transitions, 264029 flow [2021-12-06 17:17:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-12-06 17:17:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-12-06 17:17:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 8829 transitions. [2021-12-06 17:17:44,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7630282603059373 [2021-12-06 17:17:44,863 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 8829 transitions. [2021-12-06 17:17:44,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 8829 transitions. [2021-12-06 17:17:44,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:17:44,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 8829 transitions. [2021-12-06 17:17:44,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 66.38345864661655) internal successors, (8829), 133 states have internal predecessors, (8829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:44,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:44,876 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 87.0) internal successors, (11658), 134 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:17:44,876 INFO L186 Difference]: Start difference. First operand has 1061 places, 6201 transitions, 199570 flow. Second operand 133 states and 8829 transitions. [2021-12-06 17:17:44,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1193 places, 7747 transitions, 264029 flow [2021-12-06 17:18:33,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1186 places, 7747 transitions, 262866 flow, removed 507 selfloop flow, removed 7 redundant places. [2021-12-06 17:18:33,555 INFO L242 Difference]: Finished difference. Result has 1234 places, 7553 transitions, 267750 flow [2021-12-06 17:18:33,560 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=198740, PETRI_DIFFERENCE_MINUEND_PLACES=1054, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=267750, PETRI_PLACES=1234, PETRI_TRANSITIONS=7553} [2021-12-06 17:18:33,560 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1157 predicate places. [2021-12-06 17:18:33,560 INFO L470 AbstractCegarLoop]: Abstraction has has 1234 places, 7553 transitions, 267750 flow [2021-12-06 17:18:33,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.26315789473684) internal successors, (1240), 19 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:33,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:18:33,561 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:33,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 17:18:33,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:18:33,762 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:18:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:33,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1234851806, now seen corresponding path program 15 times [2021-12-06 17:18:33,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:18:33,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783322651] [2021-12-06 17:18:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:33,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:18:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:18:33,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:18:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783322651] [2021-12-06 17:18:33,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783322651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:18:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182389214] [2021-12-06 17:18:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:18:33,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:18:33,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:18:33,866 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:18:33,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 17:18:33,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:18:33,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:18:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:18:33,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:18:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:18:33,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:18:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:18:34,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182389214] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:18:34,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:18:34,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 17:18:34,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619948990] [2021-12-06 17:18:34,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:18:34,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:18:34,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:18:34,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:18:34,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:18:34,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:18:34,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1234 places, 7553 transitions, 267750 flow. Second operand has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:18:34,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:18:34,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:18:34,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:20:10,918 INFO L129 PetriNetUnfolder]: 12045/33597 cut-off events. [2021-12-06 17:20:10,918 INFO L130 PetriNetUnfolder]: For 2364947/2365051 co-relation queries the response was YES. [2021-12-06 17:20:12,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411839 conditions, 33597 events. 12045/33597 cut-off events. For 2364947/2365051 co-relation queries the response was YES. Maximal size of possible extension queue 2478. Compared 437048 event pairs, 1157 based on Foata normal form. 80/33163 useless extension candidates. Maximal degree in co-relation 411504. Up to 7782 conditions per place. [2021-12-06 17:20:13,034 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 1659 selfloop transitions, 6612 changer transitions 3/8328 dead transitions. [2021-12-06 17:20:13,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1319 places, 8328 transitions, 308389 flow [2021-12-06 17:20:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 17:20:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-12-06 17:20:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5713 transitions. [2021-12-06 17:20:13,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7635658914728682 [2021-12-06 17:20:13,037 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5713 transitions. [2021-12-06 17:20:13,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5713 transitions. [2021-12-06 17:20:13,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:20:13,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5713 transitions. [2021-12-06 17:20:13,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 66.43023255813954) internal successors, (5713), 86 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:13,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 87.0) internal successors, (7569), 87 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:13,046 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 87.0) internal successors, (7569), 87 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:13,046 INFO L186 Difference]: Start difference. First operand has 1234 places, 7553 transitions, 267750 flow. Second operand 86 states and 5713 transitions. [2021-12-06 17:20:13,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1319 places, 8328 transitions, 308389 flow [2021-12-06 17:21:23,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1281 places, 8328 transitions, 306882 flow, removed 512 selfloop flow, removed 38 redundant places. [2021-12-06 17:21:24,178 INFO L242 Difference]: Finished difference. Result has 1320 places, 8180 transitions, 313056 flow [2021-12-06 17:21:24,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=266127, PETRI_DIFFERENCE_MINUEND_PLACES=1196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=313056, PETRI_PLACES=1320, PETRI_TRANSITIONS=8180} [2021-12-06 17:21:24,184 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1243 predicate places. [2021-12-06 17:21:24,184 INFO L470 AbstractCegarLoop]: Abstraction has has 1320 places, 8180 transitions, 313056 flow [2021-12-06 17:21:24,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:21:24,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:21:24,184 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:21:24,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 17:21:24,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:21:24,386 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:21:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:21:24,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2011559796, now seen corresponding path program 16 times [2021-12-06 17:21:24,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:21:24,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053715096] [2021-12-06 17:21:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:21:24,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:21:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:21:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:21:24,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:21:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053715096] [2021-12-06 17:21:24,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053715096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:21:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632395641] [2021-12-06 17:21:24,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:21:24,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:21:24,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:21:24,464 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:21:24,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 17:21:24,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:21:24,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:21:24,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:21:24,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:21:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:21:24,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:21:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:21:24,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632395641] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:21:24,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:21:24,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-06 17:21:24,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949609334] [2021-12-06 17:21:24,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:21:24,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:21:24,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:21:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:21:24,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:21:24,733 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:21:24,734 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1320 places, 8180 transitions, 313056 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:21:24,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:21:24,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:21:24,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:23:06,406 INFO L129 PetriNetUnfolder]: 12071/33384 cut-off events. [2021-12-06 17:23:06,407 INFO L130 PetriNetUnfolder]: For 2712518/2712631 co-relation queries the response was YES. [2021-12-06 17:23:08,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 437774 conditions, 33384 events. 12071/33384 cut-off events. For 2712518/2712631 co-relation queries the response was YES. Maximal size of possible extension queue 2466. Compared 432206 event pairs, 1567 based on Foata normal form. 16/32699 useless extension candidates. Maximal degree in co-relation 437410. Up to 9770 conditions per place. [2021-12-06 17:23:08,554 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 4356 selfloop transitions, 3839 changer transitions 5/8254 dead transitions. [2021-12-06 17:23:08,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1352 places, 8254 transitions, 331718 flow [2021-12-06 17:23:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 17:23:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-06 17:23:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2230 transitions. [2021-12-06 17:23:08,556 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.776732845698363 [2021-12-06 17:23:08,556 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2230 transitions. [2021-12-06 17:23:08,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2230 transitions. [2021-12-06 17:23:08,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:23:08,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2230 transitions. [2021-12-06 17:23:08,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 67.57575757575758) internal successors, (2230), 33 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:23:08,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 87.0) internal successors, (2958), 34 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:23:08,559 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 87.0) internal successors, (2958), 34 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:23:08,559 INFO L186 Difference]: Start difference. First operand has 1320 places, 8180 transitions, 313056 flow. Second operand 33 states and 2230 transitions. [2021-12-06 17:23:08,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1352 places, 8254 transitions, 331718 flow [2021-12-06 17:24:44,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1335 places, 8254 transitions, 330970 flow, removed 206 selfloop flow, removed 17 redundant places. [2021-12-06 17:24:45,029 INFO L242 Difference]: Finished difference. Result has 1338 places, 8202 transitions, 321096 flow [2021-12-06 17:24:45,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=312314, PETRI_DIFFERENCE_MINUEND_PLACES=1303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3815, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=321096, PETRI_PLACES=1338, PETRI_TRANSITIONS=8202} [2021-12-06 17:24:45,035 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 1261 predicate places. [2021-12-06 17:24:45,036 INFO L470 AbstractCegarLoop]: Abstraction has has 1338 places, 8202 transitions, 321096 flow [2021-12-06 17:24:45,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:24:45,036 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:24:45,036 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:24:45,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 17:24:45,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:24:45,236 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:24:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:24:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash -257090374, now seen corresponding path program 17 times [2021-12-06 17:24:45,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:24:45,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927899935] [2021-12-06 17:24:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:24:45,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:24:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:24:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:24:45,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:24:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927899935] [2021-12-06 17:24:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927899935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:24:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516511826] [2021-12-06 17:24:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:24:45,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:24:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:24:45,313 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:24:45,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0146910-9425-4c51-8194-50b8fb3a3925/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 17:24:45,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 17:24:45,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:24:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:24:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:24:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:24:45,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:24:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:24:45,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516511826] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:24:45,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:24:45,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-06 17:24:45,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525549422] [2021-12-06 17:24:45,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:24:45,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:24:45,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:24:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:24:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:24:45,756 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-06 17:24:45,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1338 places, 8202 transitions, 321096 flow. Second operand has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:24:45,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:24:45,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-06 17:24:45,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand