./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y --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 c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:48:39,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:48:39,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:48:39,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:48:39,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:48:39,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:48:39,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:48:39,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:48:39,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:48:39,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:48:39,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:48:39,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:48:39,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:48:39,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:48:39,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:48:39,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:48:39,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:48:39,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:48:39,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:48:39,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:48:39,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:48:39,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:48:39,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:48:39,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:48:39,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:48:39,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:48:39,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:48:39,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:48:39,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:48:39,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:48:39,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:48:39,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:48:39,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:48:39,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:48:39,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:48:39,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:48:39,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:48:39,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:48:39,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:48:39,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:48:39,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:48:39,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:48:39,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:48:39,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:48:39,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:48:39,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:48:39,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:48:39,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:48:39,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:48:39,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:48:39,757 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:48:39,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:48:39,757 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:48:39,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:48:39,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:48:39,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:48:39,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:48:39,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:48:39,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:48:39,759 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:48:39,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:48:39,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:48:39,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:48:39,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:48:39,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:48:39,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:48:39,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:48:39,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:48:39,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:48:39,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:48:39,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:48:39,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:48:39,762 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:48:39,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:48:39,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:48:39,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:48:39,763 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_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 [2021-11-13 18:48:40,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:48:40,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:48:40,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:48:40,148 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:48:40,149 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:48:40,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-11-13 18:48:40,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/data/cba3aaefd/6244a1e67a434d8d97954b47c2ef49bd/FLAG9d33b68f7 [2021-11-13 18:48:40,717 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:48:40,718 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-11-13 18:48:40,725 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/data/cba3aaefd/6244a1e67a434d8d97954b47c2ef49bd/FLAG9d33b68f7 [2021-11-13 18:48:41,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/data/cba3aaefd/6244a1e67a434d8d97954b47c2ef49bd [2021-11-13 18:48:41,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:48:41,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:48:41,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:48:41,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:48:41,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:48:41,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbf105a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41, skipping insertion in model container [2021-11-13 18:48:41,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:48:41,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:48:41,368 WARN L228 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_b371e780-8766-4640-a274-6708b2c997a5/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2554,2567] [2021-11-13 18:48:41,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:48:41,381 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:48:41,404 WARN L228 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_b371e780-8766-4640-a274-6708b2c997a5/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2554,2567] [2021-11-13 18:48:41,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:48:41,420 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:48:41,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41 WrapperNode [2021-11-13 18:48:41,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:48:41,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:48:41,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:48:41,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:48:41,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:48:41,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:48:41,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:48:41,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:48:41,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:48:41,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:48:41,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:48:41,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:48:41,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (1/1) ... [2021-11-13 18:48:41,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:48:41,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:41,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:48:41,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:48:41,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-13 18:48:41,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-13 18:48:41,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-13 18:48:41,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-13 18:48:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:48:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:48:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:48:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-13 18:48:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-13 18:48:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:48:41,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:48:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:48:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:48:41,596 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-13 18:48:41,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:48:41,952 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:48:41,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:48:41 BoogieIcfgContainer [2021-11-13 18:48:41,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:48:41,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:48:41,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:48:41,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:48:41,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:48:41" (1/3) ... [2021-11-13 18:48:41,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96ec7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:48:41, skipping insertion in model container [2021-11-13 18:48:41,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:41" (2/3) ... [2021-11-13 18:48:41,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96ec7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:48:41, skipping insertion in model container [2021-11-13 18:48:41,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:48:41" (3/3) ... [2021-11-13 18:48:41,963 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2021-11-13 18:48:41,969 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-13 18:48:41,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:48:41,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:48:41,969 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-13 18:48:42,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,004 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,012 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,013 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,016 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,017 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,017 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,018 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,019 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,019 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:48:42,023 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-13 18:48:42,112 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:48:42,119 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 [2021-11-13 18:48:42,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-13 18:48:42,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2021-11-13 18:48:42,203 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2021-11-13 18:48:42,204 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-13 18:48:42,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-11-13 18:48:42,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2021-11-13 18:48:42,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2021-11-13 18:48:42,249 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2021-11-13 18:48:42,249 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-13 18:48:42,250 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:48:42,251 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] [2021-11-13 18:48:42,251 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:48:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:42,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1147510984, now seen corresponding path program 1 times [2021-11-13 18:48:42,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:42,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425593526] [2021-11-13 18:48:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:42,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:43,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:43,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425593526] [2021-11-13 18:48:43,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425593526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:43,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:43,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:48:43,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944813709] [2021-11-13 18:48:43,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:43,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:48:43,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:48:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:43,120 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-11-13 18:48:43,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:43,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:48:43,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-11-13 18:48:43,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:48:43,623 INFO L129 PetriNetUnfolder]: 83/278 cut-off events. [2021-11-13 18:48:43,623 INFO L130 PetriNetUnfolder]: For 46/53 co-relation queries the response was YES. [2021-11-13 18:48:43,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 278 events. 83/278 cut-off events. For 46/53 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1032 event pairs, 23 based on Foata normal form. 4/238 useless extension candidates. Maximal degree in co-relation 320. Up to 121 conditions per place. [2021-11-13 18:48:43,629 INFO L132 encePairwiseOnDemand]: 86/104 looper letters, 31 selfloop transitions, 9 changer transitions 7/104 dead transitions. [2021-11-13 18:48:43,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 323 flow [2021-11-13 18:48:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:48:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-13 18:48:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 725 transitions. [2021-11-13 18:48:43,658 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6971153846153846 [2021-11-13 18:48:43,660 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 725 transitions. [2021-11-13 18:48:43,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 725 transitions. [2021-11-13 18:48:43,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:48:43,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 725 transitions. [2021-11-13 18:48:43,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.5) internal successors, (725), 10 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:43,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:43,690 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:43,692 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 10 states and 725 transitions. [2021-11-13 18:48:43,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 323 flow [2021-11-13 18:48:43,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-13 18:48:43,702 INFO L242 Difference]: Finished difference. Result has 100 places, 91 transitions, 223 flow [2021-11-13 18:48:43,704 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=223, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2021-11-13 18:48:43,709 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2021-11-13 18:48:43,709 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 223 flow [2021-11-13 18:48:43,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:43,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:48:43,710 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, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:43,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:48:43,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:48:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:43,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1612472794, now seen corresponding path program 1 times [2021-11-13 18:48:43,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:43,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058373124] [2021-11-13 18:48:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:43,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:44,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:44,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058373124] [2021-11-13 18:48:44,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058373124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:44,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:44,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:48:44,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803120944] [2021-11-13 18:48:44,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:44,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:48:44,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:48:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:48:44,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2021-11-13 18:48:44,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:44,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:48:44,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2021-11-13 18:48:44,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:48:44,453 INFO L129 PetriNetUnfolder]: 82/277 cut-off events. [2021-11-13 18:48:44,453 INFO L130 PetriNetUnfolder]: For 54/63 co-relation queries the response was YES. [2021-11-13 18:48:44,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 277 events. 82/277 cut-off events. For 54/63 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1062 event pairs, 11 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 503. Up to 101 conditions per place. [2021-11-13 18:48:44,458 INFO L132 encePairwiseOnDemand]: 90/104 looper letters, 38 selfloop transitions, 17 changer transitions 4/114 dead transitions. [2021-11-13 18:48:44,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 114 transitions, 408 flow [2021-11-13 18:48:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:48:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-13 18:48:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 516 transitions. [2021-11-13 18:48:44,462 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7087912087912088 [2021-11-13 18:48:44,462 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 516 transitions. [2021-11-13 18:48:44,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 516 transitions. [2021-11-13 18:48:44,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:48:44,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 516 transitions. [2021-11-13 18:48:44,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.71428571428571) internal successors, (516), 7 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:44,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:44,469 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:44,469 INFO L186 Difference]: Start difference. First operand has 100 places, 91 transitions, 223 flow. Second operand 7 states and 516 transitions. [2021-11-13 18:48:44,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 114 transitions, 408 flow [2021-11-13 18:48:44,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 114 transitions, 387 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-11-13 18:48:44,475 INFO L242 Difference]: Finished difference. Result has 97 places, 98 transitions, 291 flow [2021-11-13 18:48:44,476 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2021-11-13 18:48:44,477 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2021-11-13 18:48:44,477 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 291 flow [2021-11-13 18:48:44,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:44,480 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:48:44,481 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, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:44,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:48:44,481 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:48:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1988260238, now seen corresponding path program 2 times [2021-11-13 18:48:44,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:44,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671826157] [2021-11-13 18:48:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:44,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:44,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:44,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671826157] [2021-11-13 18:48:44,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671826157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:44,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:44,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:48:44,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338492683] [2021-11-13 18:48:44,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:44,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:48:44,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:48:44,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:48:44,850 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2021-11-13 18:48:44,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:44,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:48:44,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2021-11-13 18:48:44,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:48:45,078 INFO L129 PetriNetUnfolder]: 73/264 cut-off events. [2021-11-13 18:48:45,078 INFO L130 PetriNetUnfolder]: For 117/122 co-relation queries the response was YES. [2021-11-13 18:48:45,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 264 events. 73/264 cut-off events. For 117/122 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 965 event pairs, 25 based on Foata normal form. 4/251 useless extension candidates. Maximal degree in co-relation 378. Up to 121 conditions per place. [2021-11-13 18:48:45,082 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 33 selfloop transitions, 9 changer transitions 5/102 dead transitions. [2021-11-13 18:48:45,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 380 flow [2021-11-13 18:48:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:48:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-13 18:48:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 438 transitions. [2021-11-13 18:48:45,086 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7019230769230769 [2021-11-13 18:48:45,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 438 transitions. [2021-11-13 18:48:45,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 438 transitions. [2021-11-13 18:48:45,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:48:45,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 438 transitions. [2021-11-13 18:48:45,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:45,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:45,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:45,093 INFO L186 Difference]: Start difference. First operand has 97 places, 98 transitions, 291 flow. Second operand 6 states and 438 transitions. [2021-11-13 18:48:45,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 380 flow [2021-11-13 18:48:45,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 363 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-11-13 18:48:45,099 INFO L242 Difference]: Finished difference. Result has 98 places, 93 transitions, 258 flow [2021-11-13 18:48:45,099 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2021-11-13 18:48:45,100 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 6 predicate places. [2021-11-13 18:48:45,101 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 258 flow [2021-11-13 18:48:45,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 69.33333333333333) internal successors, (416), 6 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:45,102 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:48:45,102 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, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:45,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:48:45,102 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:48:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:45,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1392836387, now seen corresponding path program 1 times [2021-11-13 18:48:45,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:45,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846821084] [2021-11-13 18:48:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:45,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:45,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:45,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846821084] [2021-11-13 18:48:45,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846821084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:45,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674663094] [2021-11-13 18:48:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:45,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:45,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:45,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:45,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:48:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:48:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:46,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:47,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674663094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:47,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:47,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-11-13 18:48:47,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476445997] [2021-11-13 18:48:47,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:47,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:48:47,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:47,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:48:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:48:47,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2021-11-13 18:48:47,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 258 flow. Second operand has 14 states, 14 states have (on average 68.28571428571429) internal successors, (956), 14 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:47,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:48:47,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2021-11-13 18:48:47,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:48:47,885 INFO L129 PetriNetUnfolder]: 122/363 cut-off events. [2021-11-13 18:48:47,885 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2021-11-13 18:48:47,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 363 events. 122/363 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1502 event pairs, 25 based on Foata normal form. 10/350 useless extension candidates. Maximal degree in co-relation 352. Up to 73 conditions per place. [2021-11-13 18:48:47,894 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 57 selfloop transitions, 15 changer transitions 0/127 dead transitions. [2021-11-13 18:48:47,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 127 transitions, 527 flow [2021-11-13 18:48:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:48:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-13 18:48:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 660 transitions. [2021-11-13 18:48:47,899 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7051282051282052 [2021-11-13 18:48:47,899 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 660 transitions. [2021-11-13 18:48:47,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 660 transitions. [2021-11-13 18:48:47,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:48:47,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 660 transitions. [2021-11-13 18:48:47,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.33333333333333) internal successors, (660), 9 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:47,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:47,906 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:47,906 INFO L186 Difference]: Start difference. First operand has 98 places, 93 transitions, 258 flow. Second operand 9 states and 660 transitions. [2021-11-13 18:48:47,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 127 transitions, 527 flow [2021-11-13 18:48:47,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 127 transitions, 489 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-11-13 18:48:47,915 INFO L242 Difference]: Finished difference. Result has 103 places, 98 transitions, 305 flow [2021-11-13 18:48:47,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=103, PETRI_TRANSITIONS=98} [2021-11-13 18:48:47,917 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2021-11-13 18:48:47,917 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 98 transitions, 305 flow [2021-11-13 18:48:47,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.28571428571429) internal successors, (956), 14 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:47,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:48:47,919 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, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:47,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:48,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:48,139 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:48:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:48,139 INFO L85 PathProgramCache]: Analyzing trace with hash -725094136, now seen corresponding path program 3 times [2021-11-13 18:48:48,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:48,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449618362] [2021-11-13 18:48:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:48,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:48,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:48,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449618362] [2021-11-13 18:48:48,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449618362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:48,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100132930] [2021-11-13 18:48:48,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:48:48,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:48,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:48,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:48,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:48:48,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:48:48,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:48,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:48:48,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:48,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:53,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100132930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:53,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:53,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-11-13 18:48:53,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274936629] [2021-11-13 18:48:53,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:53,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:48:53,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:53,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:48:53,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:48:53,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2021-11-13 18:48:53,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 98 transitions, 305 flow. Second operand has 14 states, 14 states have (on average 68.28571428571429) internal successors, (956), 14 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:53,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:48:53,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2021-11-13 18:48:53,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:48:54,324 INFO L129 PetriNetUnfolder]: 152/435 cut-off events. [2021-11-13 18:48:54,324 INFO L130 PetriNetUnfolder]: For 397/397 co-relation queries the response was YES. [2021-11-13 18:48:54,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 435 events. 152/435 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1870 event pairs, 14 based on Foata normal form. 5/418 useless extension candidates. Maximal degree in co-relation 723. Up to 93 conditions per place. [2021-11-13 18:48:54,330 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 61 selfloop transitions, 16 changer transitions 0/132 dead transitions. [2021-11-13 18:48:54,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 132 transitions, 607 flow [2021-11-13 18:48:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:48:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-13 18:48:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 657 transitions. [2021-11-13 18:48:54,342 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7019230769230769 [2021-11-13 18:48:54,342 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 657 transitions. [2021-11-13 18:48:54,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 657 transitions. [2021-11-13 18:48:54,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:48:54,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 657 transitions. [2021-11-13 18:48:54,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.0) internal successors, (657), 9 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:54,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:54,351 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 104.0) internal successors, (1040), 10 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:54,351 INFO L186 Difference]: Start difference. First operand has 103 places, 98 transitions, 305 flow. Second operand 9 states and 657 transitions. [2021-11-13 18:48:54,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 132 transitions, 607 flow [2021-11-13 18:48:54,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 594 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-13 18:48:54,366 INFO L242 Difference]: Finished difference. Result has 110 places, 102 transitions, 365 flow [2021-11-13 18:48:54,366 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=365, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2021-11-13 18:48:54,367 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 18 predicate places. [2021-11-13 18:48:54,367 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 365 flow [2021-11-13 18:48:54,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.28571428571429) internal successors, (956), 14 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:54,368 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:48:54,368 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:54,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:54,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:54,586 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:48:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:54,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1968751755, now seen corresponding path program 1 times [2021-11-13 18:48:54,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:54,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309972782] [2021-11-13 18:48:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:54,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:54,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:54,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309972782] [2021-11-13 18:48:54,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309972782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:54,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269284944] [2021-11-13 18:48:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:54,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:54,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:54,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:55,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:48:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:48:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:55,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:56,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269284944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:56,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:56,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-11-13 18:48:56,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728346429] [2021-11-13 18:48:56,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:56,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:48:56,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:48:56,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:48:56,660 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2021-11-13 18:48:56,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 365 flow. Second operand has 19 states, 19 states have (on average 67.21052631578948) internal successors, (1277), 19 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:56,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:48:56,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2021-11-13 18:48:56,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:48:57,919 INFO L129 PetriNetUnfolder]: 255/658 cut-off events. [2021-11-13 18:48:57,920 INFO L130 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2021-11-13 18:48:57,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1813 conditions, 658 events. 255/658 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3277 event pairs, 9 based on Foata normal form. 16/639 useless extension candidates. Maximal degree in co-relation 1183. Up to 135 conditions per place. [2021-11-13 18:48:57,930 INFO L132 encePairwiseOnDemand]: 90/104 looper letters, 109 selfloop transitions, 24 changer transitions 0/187 dead transitions. [2021-11-13 18:48:57,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 187 transitions, 1070 flow [2021-11-13 18:48:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:48:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-13 18:48:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1084 transitions. [2021-11-13 18:48:57,935 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6948717948717948 [2021-11-13 18:48:57,935 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1084 transitions. [2021-11-13 18:48:57,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1084 transitions. [2021-11-13 18:48:57,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:48:57,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1084 transitions. [2021-11-13 18:48:57,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.26666666666667) internal successors, (1084), 15 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:57,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 104.0) internal successors, (1664), 16 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:57,947 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 104.0) internal successors, (1664), 16 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:57,947 INFO L186 Difference]: Start difference. First operand has 110 places, 102 transitions, 365 flow. Second operand 15 states and 1084 transitions. [2021-11-13 18:48:57,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 187 transitions, 1070 flow [2021-11-13 18:48:57,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 187 transitions, 1057 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-13 18:48:57,957 INFO L242 Difference]: Finished difference. Result has 125 places, 111 transitions, 477 flow [2021-11-13 18:48:57,957 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=477, PETRI_PLACES=125, PETRI_TRANSITIONS=111} [2021-11-13 18:48:57,960 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 33 predicate places. [2021-11-13 18:48:57,960 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 111 transitions, 477 flow [2021-11-13 18:48:57,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.21052631578948) internal successors, (1277), 19 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:57,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:48:57,962 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:57,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:58,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:58,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:48:58,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:58,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1572965319, now seen corresponding path program 2 times [2021-11-13 18:48:58,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:58,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170326314] [2021-11-13 18:48:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:58,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:58,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:58,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170326314] [2021-11-13 18:48:58,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170326314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:58,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:58,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:48:58,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619623590] [2021-11-13 18:48:58,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:58,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:48:58,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:48:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:48:58,309 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-11-13 18:48:58,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 111 transitions, 477 flow. Second operand has 4 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:58,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:48:58,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-11-13 18:48:58,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:48:58,470 INFO L129 PetriNetUnfolder]: 202/765 cut-off events. [2021-11-13 18:48:58,470 INFO L130 PetriNetUnfolder]: For 1332/1348 co-relation queries the response was YES. [2021-11-13 18:48:58,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2133 conditions, 765 events. 202/765 cut-off events. For 1332/1348 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4685 event pairs, 35 based on Foata normal form. 3/722 useless extension candidates. Maximal degree in co-relation 1742. Up to 173 conditions per place. [2021-11-13 18:48:58,482 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 25 selfloop transitions, 5 changer transitions 0/127 dead transitions. [2021-11-13 18:48:58,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 127 transitions, 619 flow [2021-11-13 18:48:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:48:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-13 18:48:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2021-11-13 18:48:58,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.90625 [2021-11-13 18:48:58,485 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2021-11-13 18:48:58,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2021-11-13 18:48:58,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:48:58,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2021-11-13 18:48:58,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:58,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:58,489 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:58,489 INFO L186 Difference]: Start difference. First operand has 125 places, 111 transitions, 477 flow. Second operand 4 states and 377 transitions. [2021-11-13 18:48:58,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 127 transitions, 619 flow [2021-11-13 18:48:58,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 127 transitions, 576 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-11-13 18:48:58,498 INFO L242 Difference]: Finished difference. Result has 125 places, 114 transitions, 474 flow [2021-11-13 18:48:58,499 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=474, PETRI_PLACES=125, PETRI_TRANSITIONS=114} [2021-11-13 18:48:58,500 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 33 predicate places. [2021-11-13 18:48:58,500 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 114 transitions, 474 flow [2021-11-13 18:48:58,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:58,500 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:48:58,501 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:58,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:48:58,501 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:48:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash 165267467, now seen corresponding path program 1 times [2021-11-13 18:48:58,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:58,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210144712] [2021-11-13 18:48:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:58,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:58,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:58,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210144712] [2021-11-13 18:48:58,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210144712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:58,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258437314] [2021-11-13 18:48:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:58,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:58,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:58,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:58,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:48:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:48:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:48:59,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:49:00,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258437314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:00,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:00,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2021-11-13 18:49:00,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510393937] [2021-11-13 18:49:00,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:00,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:49:00,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:00,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:49:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:49:00,442 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-11-13 18:49:00,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 114 transitions, 474 flow. Second operand has 23 states, 23 states have (on average 65.8695652173913) internal successors, (1515), 23 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:00,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:00,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-11-13 18:49:00,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:02,701 INFO L129 PetriNetUnfolder]: 844/2114 cut-off events. [2021-11-13 18:49:02,701 INFO L130 PetriNetUnfolder]: For 4547/4547 co-relation queries the response was YES. [2021-11-13 18:49:02,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6767 conditions, 2114 events. 844/2114 cut-off events. For 4547/4547 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 14558 event pairs, 102 based on Foata normal form. 43/2103 useless extension candidates. Maximal degree in co-relation 5134. Up to 395 conditions per place. [2021-11-13 18:49:02,731 INFO L132 encePairwiseOnDemand]: 84/104 looper letters, 138 selfloop transitions, 34 changer transitions 0/228 dead transitions. [2021-11-13 18:49:02,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 228 transitions, 1529 flow [2021-11-13 18:49:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:49:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-13 18:49:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1322 transitions. [2021-11-13 18:49:02,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6690283400809717 [2021-11-13 18:49:02,737 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1322 transitions. [2021-11-13 18:49:02,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1322 transitions. [2021-11-13 18:49:02,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:02,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1322 transitions. [2021-11-13 18:49:02,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 69.57894736842105) internal successors, (1322), 19 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:02,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 104.0) internal successors, (2080), 20 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:02,749 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 104.0) internal successors, (2080), 20 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:02,750 INFO L186 Difference]: Start difference. First operand has 125 places, 114 transitions, 474 flow. Second operand 19 states and 1322 transitions. [2021-11-13 18:49:02,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 228 transitions, 1529 flow [2021-11-13 18:49:02,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 228 transitions, 1529 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-13 18:49:02,771 INFO L242 Difference]: Finished difference. Result has 147 places, 124 transitions, 636 flow [2021-11-13 18:49:02,772 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=636, PETRI_PLACES=147, PETRI_TRANSITIONS=124} [2021-11-13 18:49:02,775 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 55 predicate places. [2021-11-13 18:49:02,775 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 124 transitions, 636 flow [2021-11-13 18:49:02,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 65.8695652173913) internal successors, (1515), 23 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:02,776 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:02,777 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:02,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:02,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:49:02,981 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:02,981 INFO L85 PathProgramCache]: Analyzing trace with hash -732309584, now seen corresponding path program 2 times [2021-11-13 18:49:02,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:02,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399290532] [2021-11-13 18:49:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:02,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:49:03,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:03,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399290532] [2021-11-13 18:49:03,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399290532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:03,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:03,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:49:03,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898951427] [2021-11-13 18:49:03,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:03,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:49:03,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:03,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:49:03,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:49:03,048 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-11-13 18:49:03,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 124 transitions, 636 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:03,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:03,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-11-13 18:49:03,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:03,500 INFO L129 PetriNetUnfolder]: 427/2372 cut-off events. [2021-11-13 18:49:03,500 INFO L130 PetriNetUnfolder]: For 4669/4802 co-relation queries the response was YES. [2021-11-13 18:49:03,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7055 conditions, 2372 events. 427/2372 cut-off events. For 4669/4802 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 22410 event pairs, 138 based on Foata normal form. 79/2334 useless extension candidates. Maximal degree in co-relation 4994. Up to 324 conditions per place. [2021-11-13 18:49:03,538 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 20 selfloop transitions, 5 changer transitions 0/135 dead transitions. [2021-11-13 18:49:03,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 135 transitions, 716 flow [2021-11-13 18:49:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:49:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-13 18:49:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2021-11-13 18:49:03,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2021-11-13 18:49:03,541 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2021-11-13 18:49:03,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2021-11-13 18:49:03,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:03,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2021-11-13 18:49:03,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:03,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:03,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:03,545 INFO L186 Difference]: Start difference. First operand has 147 places, 124 transitions, 636 flow. Second operand 4 states and 376 transitions. [2021-11-13 18:49:03,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 135 transitions, 716 flow [2021-11-13 18:49:03,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 135 transitions, 673 flow, removed 2 selfloop flow, removed 12 redundant places. [2021-11-13 18:49:03,567 INFO L242 Difference]: Finished difference. Result has 141 places, 127 transitions, 627 flow [2021-11-13 18:49:03,568 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=627, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2021-11-13 18:49:03,568 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 49 predicate places. [2021-11-13 18:49:03,569 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 627 flow [2021-11-13 18:49:03,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:03,569 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:03,570 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:03,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:49:03,570 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash 425265678, now seen corresponding path program 1 times [2021-11-13 18:49:03,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:03,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057388701] [2021-11-13 18:49:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:03,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:03,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:03,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057388701] [2021-11-13 18:49:03,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057388701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:03,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559889549] [2021-11-13 18:49:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:03,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:03,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:03,848 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:03,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:49:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:49:03,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:49:04,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:49:04,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559889549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:04,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:04,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 14 [2021-11-13 18:49:04,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464299048] [2021-11-13 18:49:04,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:04,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:49:04,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:04,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:49:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:49:04,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-11-13 18:49:04,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 627 flow. Second operand has 14 states, 14 states have (on average 70.35714285714286) internal successors, (985), 14 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:04,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:04,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-11-13 18:49:04,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:06,174 INFO L129 PetriNetUnfolder]: 1711/4756 cut-off events. [2021-11-13 18:49:06,175 INFO L130 PetriNetUnfolder]: For 15400/15610 co-relation queries the response was YES. [2021-11-13 18:49:06,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17395 conditions, 4756 events. 1711/4756 cut-off events. For 15400/15610 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 43441 event pairs, 880 based on Foata normal form. 3/4745 useless extension candidates. Maximal degree in co-relation 11438. Up to 2665 conditions per place. [2021-11-13 18:49:06,252 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 111 selfloop transitions, 22 changer transitions 4/204 dead transitions. [2021-11-13 18:49:06,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 204 transitions, 1376 flow [2021-11-13 18:49:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:49:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-13 18:49:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 763 transitions. [2021-11-13 18:49:06,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7336538461538461 [2021-11-13 18:49:06,256 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 763 transitions. [2021-11-13 18:49:06,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 763 transitions. [2021-11-13 18:49:06,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:06,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 763 transitions. [2021-11-13 18:49:06,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.3) internal successors, (763), 10 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:06,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:06,262 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:06,263 INFO L186 Difference]: Start difference. First operand has 141 places, 127 transitions, 627 flow. Second operand 10 states and 763 transitions. [2021-11-13 18:49:06,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 204 transitions, 1376 flow [2021-11-13 18:49:06,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 204 transitions, 1376 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-13 18:49:06,300 INFO L242 Difference]: Finished difference. Result has 154 places, 140 transitions, 764 flow [2021-11-13 18:49:06,301 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=764, PETRI_PLACES=154, PETRI_TRANSITIONS=140} [2021-11-13 18:49:06,302 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 62 predicate places. [2021-11-13 18:49:06,302 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 140 transitions, 764 flow [2021-11-13 18:49:06,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.35714285714286) internal successors, (985), 14 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:06,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:06,303 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:06,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:06,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:06,522 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:06,522 INFO L85 PathProgramCache]: Analyzing trace with hash 944860322, now seen corresponding path program 2 times [2021-11-13 18:49:06,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:06,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369497051] [2021-11-13 18:49:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:06,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:06,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:06,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369497051] [2021-11-13 18:49:06,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369497051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:06,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021446076] [2021-11-13 18:49:06,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:49:06,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:06,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:06,803 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:06,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:49:06,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:49:06,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:49:06,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:07,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:07,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021446076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:07,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:07,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 14 [2021-11-13 18:49:07,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663965714] [2021-11-13 18:49:07,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:07,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:49:07,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:49:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:49:07,565 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-11-13 18:49:07,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 140 transitions, 764 flow. Second operand has 14 states, 14 states have (on average 70.35714285714286) internal successors, (985), 14 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:07,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:07,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-11-13 18:49:07,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:09,856 INFO L129 PetriNetUnfolder]: 3018/8594 cut-off events. [2021-11-13 18:49:09,857 INFO L130 PetriNetUnfolder]: For 30885/31323 co-relation queries the response was YES. [2021-11-13 18:49:10,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32205 conditions, 8594 events. 3018/8594 cut-off events. For 30885/31323 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 83993 event pairs, 1163 based on Foata normal form. 67/8640 useless extension candidates. Maximal degree in co-relation 32056. Up to 3339 conditions per place. [2021-11-13 18:49:10,086 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 138 selfloop transitions, 29 changer transitions 4/238 dead transitions. [2021-11-13 18:49:10,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 238 transitions, 1812 flow [2021-11-13 18:49:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:49:10,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-13 18:49:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 763 transitions. [2021-11-13 18:49:10,090 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7336538461538461 [2021-11-13 18:49:10,090 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 763 transitions. [2021-11-13 18:49:10,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 763 transitions. [2021-11-13 18:49:10,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:10,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 763 transitions. [2021-11-13 18:49:10,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.3) internal successors, (763), 10 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:10,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:10,099 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:10,099 INFO L186 Difference]: Start difference. First operand has 154 places, 140 transitions, 764 flow. Second operand 10 states and 763 transitions. [2021-11-13 18:49:10,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 238 transitions, 1812 flow [2021-11-13 18:49:10,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 238 transitions, 1753 flow, removed 25 selfloop flow, removed 5 redundant places. [2021-11-13 18:49:10,168 INFO L242 Difference]: Finished difference. Result has 160 places, 157 transitions, 937 flow [2021-11-13 18:49:10,169 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=937, PETRI_PLACES=160, PETRI_TRANSITIONS=157} [2021-11-13 18:49:10,169 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 68 predicate places. [2021-11-13 18:49:10,169 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 157 transitions, 937 flow [2021-11-13 18:49:10,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.35714285714286) internal successors, (985), 14 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:10,170 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:10,170 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:10,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:10,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:10,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:10,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:10,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1009555086, now seen corresponding path program 3 times [2021-11-13 18:49:10,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:10,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873007779] [2021-11-13 18:49:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:10,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:10,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:10,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873007779] [2021-11-13 18:49:10,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873007779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:10,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457731392] [2021-11-13 18:49:10,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:49:10,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:10,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:10,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:10,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:49:10,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:49:10,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:10,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:49:10,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:11,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:11,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457731392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:11,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:11,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-11-13 18:49:11,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036610532] [2021-11-13 18:49:11,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:11,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:49:11,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:49:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:49:11,391 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-11-13 18:49:11,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 157 transitions, 937 flow. Second operand has 15 states, 15 states have (on average 70.26666666666667) internal successors, (1054), 15 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:11,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:11,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-11-13 18:49:11,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:14,241 INFO L129 PetriNetUnfolder]: 4423/12984 cut-off events. [2021-11-13 18:49:14,241 INFO L130 PetriNetUnfolder]: For 51840/52490 co-relation queries the response was YES. [2021-11-13 18:49:14,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49626 conditions, 12984 events. 4423/12984 cut-off events. For 51840/52490 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 135665 event pairs, 1612 based on Foata normal form. 95/13044 useless extension candidates. Maximal degree in co-relation 49364. Up to 3334 conditions per place. [2021-11-13 18:49:14,418 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 168 selfloop transitions, 45 changer transitions 4/284 dead transitions. [2021-11-13 18:49:14,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 284 transitions, 2338 flow [2021-11-13 18:49:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:49:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-13 18:49:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 848 transitions. [2021-11-13 18:49:14,422 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7412587412587412 [2021-11-13 18:49:14,422 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 848 transitions. [2021-11-13 18:49:14,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 848 transitions. [2021-11-13 18:49:14,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:14,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 848 transitions. [2021-11-13 18:49:14,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.0909090909091) internal successors, (848), 11 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:14,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:14,429 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:14,429 INFO L186 Difference]: Start difference. First operand has 160 places, 157 transitions, 937 flow. Second operand 11 states and 848 transitions. [2021-11-13 18:49:14,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 284 transitions, 2338 flow [2021-11-13 18:49:14,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 284 transitions, 2279 flow, removed 25 selfloop flow, removed 5 redundant places. [2021-11-13 18:49:14,509 INFO L242 Difference]: Finished difference. Result has 166 places, 173 transitions, 1150 flow [2021-11-13 18:49:14,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1150, PETRI_PLACES=166, PETRI_TRANSITIONS=173} [2021-11-13 18:49:14,511 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 74 predicate places. [2021-11-13 18:49:14,511 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 173 transitions, 1150 flow [2021-11-13 18:49:14,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.26666666666667) internal successors, (1054), 15 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:14,512 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:14,512 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:14,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:14,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:14,739 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash -252000802, now seen corresponding path program 4 times [2021-11-13 18:49:14,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:14,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995421633] [2021-11-13 18:49:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:14,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:14,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:14,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995421633] [2021-11-13 18:49:14,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995421633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:14,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490488940] [2021-11-13 18:49:14,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:49:14,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:14,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:14,940 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:14,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:49:15,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:49:15,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:15,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:49:15,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:15,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:15,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490488940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:15,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:15,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-11-13 18:49:15,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501413060] [2021-11-13 18:49:15,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:15,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:49:15,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:15,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:49:15,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:49:15,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-11-13 18:49:15,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 173 transitions, 1150 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:15,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:15,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-11-13 18:49:15,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:16,870 INFO L129 PetriNetUnfolder]: 1095/6445 cut-off events. [2021-11-13 18:49:16,870 INFO L130 PetriNetUnfolder]: For 18264/19137 co-relation queries the response was YES. [2021-11-13 18:49:16,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21216 conditions, 6445 events. 1095/6445 cut-off events. For 18264/19137 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 71737 event pairs, 395 based on Foata normal form. 292/6553 useless extension candidates. Maximal degree in co-relation 20942. Up to 1293 conditions per place. [2021-11-13 18:49:16,939 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 75 selfloop transitions, 24 changer transitions 4/207 dead transitions. [2021-11-13 18:49:16,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 207 transitions, 1570 flow [2021-11-13 18:49:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:49:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-13 18:49:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2021-11-13 18:49:16,942 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2021-11-13 18:49:16,942 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2021-11-13 18:49:16,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2021-11-13 18:49:16,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:16,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2021-11-13 18:49:16,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:16,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:16,948 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:16,948 INFO L186 Difference]: Start difference. First operand has 166 places, 173 transitions, 1150 flow. Second operand 10 states and 843 transitions. [2021-11-13 18:49:16,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 207 transitions, 1570 flow [2021-11-13 18:49:17,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 207 transitions, 1467 flow, removed 47 selfloop flow, removed 5 redundant places. [2021-11-13 18:49:17,093 INFO L242 Difference]: Finished difference. Result has 173 places, 187 transitions, 1294 flow [2021-11-13 18:49:17,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1294, PETRI_PLACES=173, PETRI_TRANSITIONS=187} [2021-11-13 18:49:17,094 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 81 predicate places. [2021-11-13 18:49:17,095 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 187 transitions, 1294 flow [2021-11-13 18:49:17,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:17,095 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:17,096 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:17,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:17,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:49:17,315 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1310450168, now seen corresponding path program 5 times [2021-11-13 18:49:17,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:17,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628486776] [2021-11-13 18:49:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:17,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:17,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:17,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628486776] [2021-11-13 18:49:17,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628486776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:17,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855674597] [2021-11-13 18:49:17,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:49:17,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:17,518 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:17,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:49:17,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-13 18:49:17,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:49:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:49:17,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:49:18,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855674597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:18,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:18,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 14 [2021-11-13 18:49:18,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508724806] [2021-11-13 18:49:18,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:18,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:49:18,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:49:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:49:18,258 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-11-13 18:49:18,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 187 transitions, 1294 flow. Second operand has 14 states, 14 states have (on average 70.35714285714286) internal successors, (985), 14 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:18,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:18,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-11-13 18:49:18,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:21,893 INFO L129 PetriNetUnfolder]: 5918/17550 cut-off events. [2021-11-13 18:49:21,893 INFO L130 PetriNetUnfolder]: For 75087/75998 co-relation queries the response was YES. [2021-11-13 18:49:22,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68113 conditions, 17550 events. 5918/17550 cut-off events. For 75087/75998 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 194741 event pairs, 2555 based on Foata normal form. 144/17651 useless extension candidates. Maximal degree in co-relation 67770. Up to 8813 conditions per place. [2021-11-13 18:49:22,105 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 189 selfloop transitions, 34 changer transitions 4/294 dead transitions. [2021-11-13 18:49:22,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 2598 flow [2021-11-13 18:49:22,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:49:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-13 18:49:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 764 transitions. [2021-11-13 18:49:22,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7346153846153847 [2021-11-13 18:49:22,108 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 764 transitions. [2021-11-13 18:49:22,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 764 transitions. [2021-11-13 18:49:22,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:22,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 764 transitions. [2021-11-13 18:49:22,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.4) internal successors, (764), 10 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:22,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:22,113 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:22,114 INFO L186 Difference]: Start difference. First operand has 173 places, 187 transitions, 1294 flow. Second operand 10 states and 764 transitions. [2021-11-13 18:49:22,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 2598 flow [2021-11-13 18:49:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 294 transitions, 2527 flow, removed 25 selfloop flow, removed 6 redundant places. [2021-11-13 18:49:22,259 INFO L242 Difference]: Finished difference. Result has 178 places, 204 transitions, 1510 flow [2021-11-13 18:49:22,259 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1510, PETRI_PLACES=178, PETRI_TRANSITIONS=204} [2021-11-13 18:49:22,260 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 86 predicate places. [2021-11-13 18:49:22,261 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 204 transitions, 1510 flow [2021-11-13 18:49:22,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.35714285714286) internal successors, (985), 14 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:22,261 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:22,262 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:22,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-13 18:49:22,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:49:22,462 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash -8601200, now seen corresponding path program 6 times [2021-11-13 18:49:22,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:22,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797228955] [2021-11-13 18:49:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:22,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:22,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:22,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797228955] [2021-11-13 18:49:22,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797228955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:22,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942133530] [2021-11-13 18:49:22,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:49:22,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:22,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:22,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:49:22,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-13 18:49:22,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:22,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:49:22,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:23,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:23,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942133530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:23,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:23,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-11-13 18:49:23,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098336618] [2021-11-13 18:49:23,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:23,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:49:23,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:49:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:49:23,327 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-11-13 18:49:23,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 204 transitions, 1510 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:23,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:23,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-11-13 18:49:23,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:24,029 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([266] L63-->L70: Formula: (= v_~pos~0_5 (+ v_~pos~0_6 2)) InVars {~pos~0=v_~pos~0_6} OutVars{~pos~0=v_~pos~0_5} AuxVars[] AssignedVars[~pos~0][162], [60#L70true, 2853#true, Black: 2243#(and (<= (div ~d1~0 256) 0) (<= 1 ~d1~0)), Black: 2240#true, 4664#true, 4063#true, 3458#true, Black: 628#true, Black: 5261#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 5263#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 4670#(<= ~pos~0 (+ (* 4294967296 (div (+ (- 1) ~pos~0) 4294967296)) 1)), 156#(<= (+ ~i2~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i2~0 4294967296)))), Black: 4671#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 144#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ (* 4294967296 (div ~pos~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~pos~0)) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ (* 4294967296 (div ~pos~0 4294967296)) ~i1~0))), 634#(<= (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296)))), 7#L94-4true, Black: 3466#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 126#true, 2248#true, 9#L51true, Black: 2254#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 1838#(and (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296))), Black: 1626#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 1328#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= ~i2~0 (+ (* 4294967296 (div (+ (- 1) ~i2~0) 4294967296)) 1))), Black: 1106#true, Black: 1629#(and (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* ~N~0 2) 4294967296))), Black: 623#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (div (mod ~i2~0 4294967296) (- 4294967296)) (+ (div (+ (- 1) (mod (* ~N~0 2) 4294967296) (* (mod ~i2~0 4294967296) (- 1))) 4294967296) 1)) (= (mod ~i2~0 4294967296) 0)), Black: 289#(and (< (div (mod ~i2~0 4294967296) (- 4294967296)) (+ (div (+ (- 1) (mod (* ~N~0 2) 4294967296) (* (mod ~i2~0 4294967296) (- 1))) 4294967296) 1)) (= (mod ~i2~0 4294967296) 0)), Black: 1646#true, Black: 4068#(<= (+ ~pos~0 1) (* 4294967296 (div (+ ~pos~0 1) 4294967296))), Black: 150#true, 1401#(< (mod ~i2~0 4294967296) (mod (* ~N~0 2) 4294967296)), Black: 1649#(and (<= ~d2~0 (* 256 (div ~d2~0 256))) (<= 0 ~d2~0)), Black: 4069#(<= ~pos~0 (+ (* 4294967296 (div (+ (- 2) ~pos~0) 4294967296)) 2)), Black: 4067#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 1648#(not (= (* 256 (div ~d2~0 256)) ~d2~0)), 5269#true, Black: 110#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ (* 4294967296 (div ~pos~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~pos~0)) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ (* 4294967296 (div ~pos~0 4294967296)) ~i1~0))), 2242#(= (* 256 (div ~d1~0 256)) ~d1~0), Black: 2224#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~i1~0)) (= (mod ~i1~0 4294967296) 0)), Black: 2228#(and (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296)) (<= |thread1Thread1of1ForFork0_#t~post5| (* 2 (div (+ ~i2~0 (* (div ~i2~0 4294967296) (- 4294967296)) (* (div (+ |thread1Thread1of1ForFork0_#t~post5| (* (div ~i2~0 4294967296) 4294967296) (* ~i2~0 (- 1))) 4294967296) 4294967296)) 2))) (= (mod |thread1Thread1of1ForFork0_#t~post5| 4294967296) 0)), Black: 2230#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i1~0 4294967296) 0)), Black: 2859#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1654#true, Black: 2860#(<= (+ ~pos~0 2) (* 4294967296 (div (+ ~pos~0 2) 4294967296)))]) [2021-11-13 18:49:24,030 INFO L384 tUnfolder$Statistics]: this new event has 75 ancestors and is cut-off event [2021-11-13 18:49:24,030 INFO L387 tUnfolder$Statistics]: existing Event has 75 ancestors and is cut-off event [2021-11-13 18:49:24,030 INFO L387 tUnfolder$Statistics]: existing Event has 68 ancestors and is cut-off event [2021-11-13 18:49:24,030 INFO L387 tUnfolder$Statistics]: existing Event has 75 ancestors and is cut-off event [2021-11-13 18:49:24,483 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([266] L63-->L70: Formula: (= v_~pos~0_5 (+ v_~pos~0_6 2)) InVars {~pos~0=v_~pos~0_6} OutVars{~pos~0=v_~pos~0_5} AuxVars[] AssignedVars[~pos~0][162], [60#L70true, 2853#true, Black: 2242#(= (* 256 (div ~d1~0 256)) ~d1~0), Black: 2240#true, 4664#true, 4063#true, 3458#true, 628#true, 66#L95-2true, Black: 5261#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 5263#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 4670#(<= ~pos~0 (+ (* 4294967296 (div (+ (- 1) ~pos~0) 4294967296)) 1)), 156#(<= (+ ~i2~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i2~0 4294967296)))), Black: 4671#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 144#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ (* 4294967296 (div ~pos~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~pos~0)) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ (* 4294967296 (div ~pos~0 4294967296)) ~i1~0))), Black: 3466#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 126#true, 2248#true, Black: 2254#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 2243#(and (<= (div ~d1~0 256) 0) (<= 1 ~d1~0)), Black: 1626#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 1328#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= ~i2~0 (+ (* 4294967296 (div (+ (- 1) ~i2~0) 4294967296)) 1))), Black: 1106#true, Black: 1629#(and (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* ~N~0 2) 4294967296))), Black: 623#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (div (mod ~i2~0 4294967296) (- 4294967296)) (+ (div (+ (- 1) (mod (* ~N~0 2) 4294967296) (* (mod ~i2~0 4294967296) (- 1))) 4294967296) 1)) (= (mod ~i2~0 4294967296) 0)), Black: 289#(and (< (div (mod ~i2~0 4294967296) (- 4294967296)) (+ (div (+ (- 1) (mod (* ~N~0 2) 4294967296) (* (mod ~i2~0 4294967296) (- 1))) 4294967296) 1)) (= (mod ~i2~0 4294967296) 0)), Black: 1646#true, Black: 4068#(<= (+ ~pos~0 1) (* 4294967296 (div (+ ~pos~0 1) 4294967296))), Black: 150#true, 1401#(< (mod ~i2~0 4294967296) (mod (* ~N~0 2) 4294967296)), Black: 1649#(and (<= ~d2~0 (* 256 (div ~d2~0 256))) (<= 0 ~d2~0)), Black: 4069#(<= ~pos~0 (+ (* 4294967296 (div (+ (- 2) ~pos~0) 4294967296)) 2)), Black: 4067#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 1648#(not (= (* 256 (div ~d2~0 256)) ~d2~0)), 5269#true, Black: 110#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ (* 4294967296 (div ~pos~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~pos~0)) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ (* 4294967296 (div ~pos~0 4294967296)) ~i1~0))), Black: 2224#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~i1~0)) (= (mod ~i1~0 4294967296) 0)), Black: 2228#(and (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296)) (<= |thread1Thread1of1ForFork0_#t~post5| (* 2 (div (+ ~i2~0 (* (div ~i2~0 4294967296) (- 4294967296)) (* (div (+ |thread1Thread1of1ForFork0_#t~post5| (* (div ~i2~0 4294967296) 4294967296) (* ~i2~0 (- 1))) 4294967296) 4294967296)) 2))) (= (mod |thread1Thread1of1ForFork0_#t~post5| 4294967296) 0)), Black: 2230#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i1~0 4294967296) 0)), Black: 2859#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 2860#(<= (+ ~pos~0 2) (* 4294967296 (div (+ ~pos~0 2) 4294967296))), Black: 1654#true]) [2021-11-13 18:49:24,483 INFO L384 tUnfolder$Statistics]: this new event has 86 ancestors and is cut-off event [2021-11-13 18:49:24,483 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2021-11-13 18:49:24,483 INFO L387 tUnfolder$Statistics]: existing Event has 86 ancestors and is cut-off event [2021-11-13 18:49:24,483 INFO L387 tUnfolder$Statistics]: existing Event has 86 ancestors and is cut-off event [2021-11-13 18:49:25,358 INFO L129 PetriNetUnfolder]: 1744/10452 cut-off events. [2021-11-13 18:49:25,358 INFO L130 PetriNetUnfolder]: For 34454/36538 co-relation queries the response was YES. [2021-11-13 18:49:25,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35022 conditions, 10452 events. 1744/10452 cut-off events. For 34454/36538 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 128724 event pairs, 570 based on Foata normal form. 673/10852 useless extension candidates. Maximal degree in co-relation 34567. Up to 1667 conditions per place. [2021-11-13 18:49:25,654 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 81 selfloop transitions, 59 changer transitions 4/248 dead transitions. [2021-11-13 18:49:25,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 248 transitions, 2121 flow [2021-11-13 18:49:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:49:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-13 18:49:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 936 transitions. [2021-11-13 18:49:25,657 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2021-11-13 18:49:25,658 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 936 transitions. [2021-11-13 18:49:25,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 936 transitions. [2021-11-13 18:49:25,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:25,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 936 transitions. [2021-11-13 18:49:25,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 85.0909090909091) internal successors, (936), 11 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:25,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:25,663 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:25,664 INFO L186 Difference]: Start difference. First operand has 178 places, 204 transitions, 1510 flow. Second operand 11 states and 936 transitions. [2021-11-13 18:49:25,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 248 transitions, 2121 flow [2021-11-13 18:49:25,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 248 transitions, 1997 flow, removed 55 selfloop flow, removed 6 redundant places. [2021-11-13 18:49:25,759 INFO L242 Difference]: Finished difference. Result has 183 places, 220 transitions, 1760 flow [2021-11-13 18:49:25,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1760, PETRI_PLACES=183, PETRI_TRANSITIONS=220} [2021-11-13 18:49:25,760 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 91 predicate places. [2021-11-13 18:49:25,760 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 220 transitions, 1760 flow [2021-11-13 18:49:25,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:25,760 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:25,760 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:25,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:25,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:49:25,963 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:25,963 INFO L85 PathProgramCache]: Analyzing trace with hash 648589718, now seen corresponding path program 1 times [2021-11-13 18:49:25,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:25,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026631453] [2021-11-13 18:49:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:25,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:26,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:26,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026631453] [2021-11-13 18:49:26,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026631453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:26,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:26,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:49:26,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231621008] [2021-11-13 18:49:26,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:26,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:49:26,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:49:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:49:26,016 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-11-13 18:49:26,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 220 transitions, 1760 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:26,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:26,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-11-13 18:49:26,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:27,071 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([254] L49-->L51: Formula: (= v_~pos~0_18 (+ v_~pos~0_17 1)) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post4=|v_thread1Thread1of1ForFork0_#t~post4_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post4, ~pos~0][192], [60#L70true, 2853#true, Black: 2243#(and (<= (div ~d1~0 256) 0) (<= 1 ~d1~0)), Black: 2240#true, 4664#true, 4063#true, 3458#true, 5872#(and (<= (div ~d2~0 256) 0) (<= 1 ~d2~0)), Black: 628#true, Black: 4670#(<= ~pos~0 (+ (* 4294967296 (div (+ (- 1) ~pos~0) 4294967296)) 1)), 156#(<= (+ ~i2~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i2~0 4294967296)))), Black: 4671#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 144#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ (* 4294967296 (div ~pos~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~pos~0)) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ (* 4294967296 (div ~pos~0 4294967296)) ~i1~0))), 634#(<= (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296)))), 7#L94-4true, Black: 3466#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 126#true, 2248#true, 9#L51true, Black: 2254#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 2037#(< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)), Black: 1626#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 1328#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= ~i2~0 (+ (* 4294967296 (div (+ (- 1) ~i2~0) 4294967296)) 1))), Black: 5864#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 5862#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 1106#true, Black: 5273#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1629#(and (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* ~N~0 2) 4294967296))), Black: 623#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (div (mod ~i2~0 4294967296) (- 4294967296)) (+ (div (+ (- 1) (mod (* ~N~0 2) 4294967296) (* (mod ~i2~0 4294967296) (- 1))) 4294967296) 1)) (= (mod ~i2~0 4294967296) 0)), Black: 289#(and (< (div (mod ~i2~0 4294967296) (- 4294967296)) (+ (div (+ (- 1) (mod (* ~N~0 2) 4294967296) (* (mod ~i2~0 4294967296) (- 1))) 4294967296) 1)) (= (mod ~i2~0 4294967296) 0)), Black: 150#true, Black: 4068#(<= (+ ~pos~0 1) (* 4294967296 (div (+ ~pos~0 1) 4294967296))), Black: 1646#true, 1401#(< (mod ~i2~0 4294967296) (mod (* ~N~0 2) 4294967296)), Black: 4069#(<= ~pos~0 (+ (* 4294967296 (div (+ (- 2) ~pos~0) 4294967296)) 2)), Black: 1649#(and (<= ~d2~0 (* 256 (div ~d2~0 256))) (<= 0 ~d2~0)), Black: 4067#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 5269#true, 1648#(not (= (* 256 (div ~d2~0 256)) ~d2~0)), 2242#(= (* 256 (div ~d1~0 256)) ~d1~0), Black: 2224#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~i1~0)) (= (mod ~i1~0 4294967296) 0)), Black: 2228#(and (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296)) (<= |thread1Thread1of1ForFork0_#t~post5| (* 2 (div (+ ~i2~0 (* (div ~i2~0 4294967296) (- 4294967296)) (* (div (+ |thread1Thread1of1ForFork0_#t~post5| (* (div ~i2~0 4294967296) 4294967296) (* ~i2~0 (- 1))) 4294967296) 4294967296)) 2))) (= (mod |thread1Thread1of1ForFork0_#t~post5| 4294967296) 0)), Black: 2230#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i1~0 4294967296) 0)), Black: 2859#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1654#true, Black: 2860#(<= (+ ~pos~0 2) (* 4294967296 (div (+ ~pos~0 2) 4294967296)))]) [2021-11-13 18:49:27,071 INFO L384 tUnfolder$Statistics]: this new event has 89 ancestors and is cut-off event [2021-11-13 18:49:27,071 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2021-11-13 18:49:27,071 INFO L387 tUnfolder$Statistics]: existing Event has 75 ancestors and is cut-off event [2021-11-13 18:49:27,071 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2021-11-13 18:49:27,095 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([254] L49-->L51: Formula: (= v_~pos~0_18 (+ v_~pos~0_17 1)) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post4=|v_thread1Thread1of1ForFork0_#t~post4_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post4, ~pos~0][182], [2853#true, Black: 2243#(and (<= (div ~d1~0 256) 0) (<= 1 ~d1~0)), Black: 2240#true, 4664#true, 4063#true, 3458#true, 1649#(and (<= ~d2~0 (* 256 (div ~d2~0 256))) (<= 0 ~d2~0)), 69#L73true, Black: 628#true, Black: 4670#(<= ~pos~0 (+ (* 4294967296 (div (+ (- 1) ~pos~0) 4294967296)) 1)), 156#(<= (+ ~i2~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i2~0 4294967296)))), Black: 4671#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 144#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ (* 4294967296 (div ~pos~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~pos~0)) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ (* 4294967296 (div ~pos~0 4294967296)) ~i1~0))), 634#(<= (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296)))), 7#L94-4true, Black: 3466#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 126#true, 5871#(= (* 256 (div ~d2~0 256)) ~d2~0), 2248#true, 9#L51true, Black: 2254#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 2037#(< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)), Black: 1626#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 1328#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= ~i2~0 (+ (* 4294967296 (div (+ (- 1) ~i2~0) 4294967296)) 1))), Black: 5864#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 5862#(and (<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 1106#true, Black: 5273#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1629#(and (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* ~N~0 2) 4294967296))), Black: 623#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (< (div (mod ~i2~0 4294967296) (- 4294967296)) (+ (div (+ (- 1) (mod (* ~N~0 2) 4294967296) (* (mod ~i2~0 4294967296) (- 1))) 4294967296) 1)) (= (mod ~i2~0 4294967296) 0)), Black: 289#(and (< (div (mod ~i2~0 4294967296) (- 4294967296)) (+ (div (+ (- 1) (mod (* ~N~0 2) 4294967296) (* (mod ~i2~0 4294967296) (- 1))) 4294967296) 1)) (= (mod ~i2~0 4294967296) 0)), Black: 150#true, Black: 4068#(<= (+ ~pos~0 1) (* 4294967296 (div (+ ~pos~0 1) 4294967296))), Black: 1646#true, Black: 1648#(not (= (* 256 (div ~d2~0 256)) ~d2~0)), 1401#(< (mod ~i2~0 4294967296) (mod (* ~N~0 2) 4294967296)), Black: 4069#(<= ~pos~0 (+ (* 4294967296 (div (+ (- 2) ~pos~0) 4294967296)) 2)), Black: 4067#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), 5269#true, 2242#(= (* 256 (div ~d1~0 256)) ~d1~0), Black: 2224#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~i1~0)) (= (mod ~i1~0 4294967296) 0)), Black: 2228#(and (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296)) (<= |thread1Thread1of1ForFork0_#t~post5| (* 2 (div (+ ~i2~0 (* (div ~i2~0 4294967296) (- 4294967296)) (* (div (+ |thread1Thread1of1ForFork0_#t~post5| (* (div ~i2~0 4294967296) 4294967296) (* ~i2~0 (- 1))) 4294967296) 4294967296)) 2))) (= (mod |thread1Thread1of1ForFork0_#t~post5| 4294967296) 0)), Black: 2230#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i1~0 4294967296) 0)), Black: 2859#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1654#true, Black: 2860#(<= (+ ~pos~0 2) (* 4294967296 (div (+ ~pos~0 2) 4294967296)))]) [2021-11-13 18:49:27,095 INFO L384 tUnfolder$Statistics]: this new event has 90 ancestors and is cut-off event [2021-11-13 18:49:27,096 INFO L387 tUnfolder$Statistics]: existing Event has 83 ancestors and is cut-off event [2021-11-13 18:49:27,096 INFO L387 tUnfolder$Statistics]: existing Event has 83 ancestors and is cut-off event [2021-11-13 18:49:27,096 INFO L387 tUnfolder$Statistics]: existing Event has 76 ancestors and is cut-off event [2021-11-13 18:49:27,258 INFO L129 PetriNetUnfolder]: 1634/7688 cut-off events. [2021-11-13 18:49:27,258 INFO L130 PetriNetUnfolder]: For 29055/29977 co-relation queries the response was YES. [2021-11-13 18:49:27,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27677 conditions, 7688 events. 1634/7688 cut-off events. For 29055/29977 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 89727 event pairs, 401 based on Foata normal form. 546/7982 useless extension candidates. Maximal degree in co-relation 27500. Up to 1159 conditions per place. [2021-11-13 18:49:27,341 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 113 selfloop transitions, 6 changer transitions 0/265 dead transitions. [2021-11-13 18:49:27,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 265 transitions, 2529 flow [2021-11-13 18:49:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:49:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-13 18:49:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2021-11-13 18:49:27,343 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2021-11-13 18:49:27,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2021-11-13 18:49:27,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2021-11-13 18:49:27,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:27,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2021-11-13 18:49:27,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:27,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:27,345 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:27,345 INFO L186 Difference]: Start difference. First operand has 183 places, 220 transitions, 1760 flow. Second operand 4 states and 375 transitions. [2021-11-13 18:49:27,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 265 transitions, 2529 flow [2021-11-13 18:49:27,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 265 transitions, 2400 flow, removed 59 selfloop flow, removed 5 redundant places. [2021-11-13 18:49:27,420 INFO L242 Difference]: Finished difference. Result has 181 places, 207 transitions, 1592 flow [2021-11-13 18:49:27,420 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1592, PETRI_PLACES=181, PETRI_TRANSITIONS=207} [2021-11-13 18:49:27,421 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 89 predicate places. [2021-11-13 18:49:27,421 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 207 transitions, 1592 flow [2021-11-13 18:49:27,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:27,421 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:27,422 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:27,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:49:27,422 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash -769984204, now seen corresponding path program 7 times [2021-11-13 18:49:27,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:27,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694431914] [2021-11-13 18:49:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:27,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:27,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:27,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694431914] [2021-11-13 18:49:27,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694431914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:27,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956915849] [2021-11-13 18:49:27,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:49:27,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:27,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:27,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:27,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:49:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:49:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:28,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:28,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956915849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:28,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:28,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-11-13 18:49:28,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7284972] [2021-11-13 18:49:28,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:28,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:49:28,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:28,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:49:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:49:28,458 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-11-13 18:49:28,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 207 transitions, 1592 flow. Second operand has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:28,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:28,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-11-13 18:49:28,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:32,437 INFO L129 PetriNetUnfolder]: 6184/18856 cut-off events. [2021-11-13 18:49:32,438 INFO L130 PetriNetUnfolder]: For 82240/83280 co-relation queries the response was YES. [2021-11-13 18:49:32,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74102 conditions, 18856 events. 6184/18856 cut-off events. For 82240/83280 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 222714 event pairs, 3062 based on Foata normal form. 341/19140 useless extension candidates. Maximal degree in co-relation 64608. Up to 8160 conditions per place. [2021-11-13 18:49:32,665 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 229 selfloop transitions, 47 changer transitions 4/349 dead transitions. [2021-11-13 18:49:32,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 349 transitions, 3270 flow [2021-11-13 18:49:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:49:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-13 18:49:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 850 transitions. [2021-11-13 18:49:32,667 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.743006993006993 [2021-11-13 18:49:32,668 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 850 transitions. [2021-11-13 18:49:32,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 850 transitions. [2021-11-13 18:49:32,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:32,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 850 transitions. [2021-11-13 18:49:32,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.27272727272727) internal successors, (850), 11 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:32,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:32,672 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:32,672 INFO L186 Difference]: Start difference. First operand has 181 places, 207 transitions, 1592 flow. Second operand 11 states and 850 transitions. [2021-11-13 18:49:32,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 349 transitions, 3270 flow [2021-11-13 18:49:32,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 349 transitions, 3270 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-13 18:49:32,822 INFO L242 Difference]: Finished difference. Result has 196 places, 235 transitions, 2050 flow [2021-11-13 18:49:32,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2050, PETRI_PLACES=196, PETRI_TRANSITIONS=235} [2021-11-13 18:49:32,824 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 104 predicate places. [2021-11-13 18:49:32,824 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 235 transitions, 2050 flow [2021-11-13 18:49:32,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.2) internal successors, (1053), 15 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:32,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:32,825 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:32,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-13 18:49:33,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:49:33,029 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:33,029 INFO L85 PathProgramCache]: Analyzing trace with hash 431343940, now seen corresponding path program 8 times [2021-11-13 18:49:33,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:33,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068064654] [2021-11-13 18:49:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:33,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:33,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:33,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068064654] [2021-11-13 18:49:33,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068064654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:33,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492261935] [2021-11-13 18:49:33,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:49:33,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:33,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:33,207 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:33,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:49:33,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:49:33,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:33,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:49:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:33,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:49:33,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492261935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:33,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:33,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-11-13 18:49:33,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111267873] [2021-11-13 18:49:33,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:33,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:49:33,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:49:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:49:33,811 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-11-13 18:49:33,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 235 transitions, 2050 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:33,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:33,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-11-13 18:49:33,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:35,855 INFO L129 PetriNetUnfolder]: 1428/9012 cut-off events. [2021-11-13 18:49:35,855 INFO L130 PetriNetUnfolder]: For 32576/34409 co-relation queries the response was YES. [2021-11-13 18:49:35,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31313 conditions, 9012 events. 1428/9012 cut-off events. For 32576/34409 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 113338 event pairs, 535 based on Foata normal form. 793/9549 useless extension candidates. Maximal degree in co-relation 30956. Up to 1395 conditions per place. [2021-11-13 18:49:35,948 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 94 selfloop transitions, 71 changer transitions 4/275 dead transitions. [2021-11-13 18:49:35,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 275 transitions, 2660 flow [2021-11-13 18:49:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:49:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-13 18:49:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 934 transitions. [2021-11-13 18:49:35,950 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8164335664335665 [2021-11-13 18:49:35,950 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 934 transitions. [2021-11-13 18:49:35,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 934 transitions. [2021-11-13 18:49:35,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:35,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 934 transitions. [2021-11-13 18:49:35,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.9090909090909) internal successors, (934), 11 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:35,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:35,954 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:35,954 INFO L186 Difference]: Start difference. First operand has 196 places, 235 transitions, 2050 flow. Second operand 11 states and 934 transitions. [2021-11-13 18:49:35,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 275 transitions, 2660 flow [2021-11-13 18:49:36,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 275 transitions, 2587 flow, removed 32 selfloop flow, removed 5 redundant places. [2021-11-13 18:49:36,023 INFO L242 Difference]: Finished difference. Result has 202 places, 248 transitions, 2320 flow [2021-11-13 18:49:36,023 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2320, PETRI_PLACES=202, PETRI_TRANSITIONS=248} [2021-11-13 18:49:36,024 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 110 predicate places. [2021-11-13 18:49:36,024 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 248 transitions, 2320 flow [2021-11-13 18:49:36,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:36,025 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:36,025 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:36,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:36,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:49:36,239 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:36,239 INFO L85 PathProgramCache]: Analyzing trace with hash 71435098, now seen corresponding path program 1 times [2021-11-13 18:49:36,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:36,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381435195] [2021-11-13 18:49:36,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:36,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:49:36,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:36,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381435195] [2021-11-13 18:49:36,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381435195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:36,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:36,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:49:36,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196307385] [2021-11-13 18:49:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:36,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:49:36,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:49:36,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:49:36,333 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-11-13 18:49:36,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 248 transitions, 2320 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:36,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:36,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-11-13 18:49:36,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:49:37,079 INFO L129 PetriNetUnfolder]: 650/4654 cut-off events. [2021-11-13 18:49:37,079 INFO L130 PetriNetUnfolder]: For 17281/17820 co-relation queries the response was YES. [2021-11-13 18:49:37,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16862 conditions, 4654 events. 650/4654 cut-off events. For 17281/17820 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 51875 event pairs, 245 based on Foata normal form. 287/4818 useless extension candidates. Maximal degree in co-relation 16701. Up to 765 conditions per place. [2021-11-13 18:49:37,150 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 69 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2021-11-13 18:49:37,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 231 transitions, 2236 flow [2021-11-13 18:49:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:49:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-13 18:49:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2021-11-13 18:49:37,151 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8966346153846154 [2021-11-13 18:49:37,151 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 373 transitions. [2021-11-13 18:49:37,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 373 transitions. [2021-11-13 18:49:37,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:49:37,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 373 transitions. [2021-11-13 18:49:37,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:37,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:37,153 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:37,153 INFO L186 Difference]: Start difference. First operand has 202 places, 248 transitions, 2320 flow. Second operand 4 states and 373 transitions. [2021-11-13 18:49:37,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 231 transitions, 2236 flow [2021-11-13 18:49:37,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 231 transitions, 2169 flow, removed 15 selfloop flow, removed 7 redundant places. [2021-11-13 18:49:37,198 INFO L242 Difference]: Finished difference. Result has 198 places, 226 transitions, 2027 flow [2021-11-13 18:49:37,199 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2027, PETRI_PLACES=198, PETRI_TRANSITIONS=226} [2021-11-13 18:49:37,199 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 106 predicate places. [2021-11-13 18:49:37,199 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 226 transitions, 2027 flow [2021-11-13 18:49:37,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:37,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:49:37,200 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:37,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:49:37,200 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:49:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1332533349, now seen corresponding path program 9 times [2021-11-13 18:49:37,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:37,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856901858] [2021-11-13 18:49:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:37,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:37,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:37,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856901858] [2021-11-13 18:49:37,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856901858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:37,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361543060] [2021-11-13 18:49:37,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:49:37,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:37,724 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:37,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:49:38,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:49:38,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:38,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:49:38,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:49:39,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:49:42,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361543060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:42,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:42,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2021-11-13 18:49:42,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156718999] [2021-11-13 18:49:42,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:42,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:49:42,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:42,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:49:42,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:49:42,355 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-11-13 18:49:42,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 226 transitions, 2027 flow. Second operand has 36 states, 36 states have (on average 69.69444444444444) internal successors, (2509), 36 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:42,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:49:42,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-11-13 18:49:42,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:50:17,074 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 51 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:52:26,041 INFO L129 PetriNetUnfolder]: 11342/32276 cut-off events. [2021-11-13 18:52:26,042 INFO L130 PetriNetUnfolder]: For 144117/144310 co-relation queries the response was YES. [2021-11-13 18:52:26,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135019 conditions, 32276 events. 11342/32276 cut-off events. For 144117/144310 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 374856 event pairs, 482 based on Foata normal form. 984/33166 useless extension candidates. Maximal degree in co-relation 119696. Up to 4710 conditions per place. [2021-11-13 18:52:26,504 INFO L132 encePairwiseOnDemand]: 85/104 looper letters, 962 selfloop transitions, 294 changer transitions 0/1369 dead transitions. [2021-11-13 18:52:26,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1369 transitions, 15342 flow [2021-11-13 18:52:26,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-11-13 18:52:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-11-13 18:52:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 9624 transitions. [2021-11-13 18:52:26,527 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6905855338691159 [2021-11-13 18:52:26,527 INFO L72 ComplementDD]: Start complementDD. Operand 134 states and 9624 transitions. [2021-11-13 18:52:26,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 134 states and 9624 transitions. [2021-11-13 18:52:26,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:52:26,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 134 states and 9624 transitions. [2021-11-13 18:52:26,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 135 states, 134 states have (on average 71.82089552238806) internal successors, (9624), 134 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:26,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 135 states, 135 states have (on average 104.0) internal successors, (14040), 135 states have internal predecessors, (14040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:26,583 INFO L81 ComplementDD]: Finished complementDD. Result has 135 states, 135 states have (on average 104.0) internal successors, (14040), 135 states have internal predecessors, (14040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:26,583 INFO L186 Difference]: Start difference. First operand has 198 places, 226 transitions, 2027 flow. Second operand 134 states and 9624 transitions. [2021-11-13 18:52:26,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1369 transitions, 15342 flow [2021-11-13 18:52:27,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1369 transitions, 15342 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-13 18:52:27,298 INFO L242 Difference]: Finished difference. Result has 392 places, 544 transitions, 5492 flow [2021-11-13 18:52:27,299 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=5492, PETRI_PLACES=392, PETRI_TRANSITIONS=544} [2021-11-13 18:52:27,299 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 300 predicate places. [2021-11-13 18:52:27,299 INFO L470 AbstractCegarLoop]: Abstraction has has 392 places, 544 transitions, 5492 flow [2021-11-13 18:52:27,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 69.69444444444444) internal successors, (2509), 36 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:27,300 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:52:27,300 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:27,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-13 18:52:27,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:27,505 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:52:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:27,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2060320226, now seen corresponding path program 10 times [2021-11-13 18:52:27,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:27,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74339079] [2021-11-13 18:52:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:27,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:28,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:28,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74339079] [2021-11-13 18:52:28,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74339079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:28,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705260181] [2021-11-13 18:52:28,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:52:28,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:28,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:28,046 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:28,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:52:28,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:52:28,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:28,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:52:28,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:30,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:45,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705260181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:45,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:45,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 39 [2021-11-13 18:52:45,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456307039] [2021-11-13 18:52:45,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:45,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 18:52:45,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:45,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 18:52:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1291, Unknown=1, NotChecked=0, Total=1482 [2021-11-13 18:52:45,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-11-13 18:52:45,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 544 transitions, 5492 flow. Second operand has 39 states, 39 states have (on average 65.56410256410257) internal successors, (2557), 39 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:45,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:52:45,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-11-13 18:52:45,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:53:29,801 WARN L227 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 59 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:54:25,472 WARN L227 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 59 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:55:06,665 WARN L227 SmtUtils]: Spent 16.05s on a formula simplification. DAG size of input: 58 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:55:28,383 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:55:47,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:55:49,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:56:09,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:56:29,098 WARN L227 SmtUtils]: Spent 7.99s on a formula simplification. DAG size of input: 53 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:56:43,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:57:03,408 WARN L227 SmtUtils]: Spent 14.28s on a formula simplification. DAG size of input: 55 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:57:23,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:58:11,955 WARN L227 SmtUtils]: Spent 15.33s on a formula simplification. DAG size of input: 65 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:58:25,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:58:34,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:58:36,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:58:57,768 WARN L227 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 58 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:59:09,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:59:11,770 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:59:13,911 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 19:00:24,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 19:00:55,702 INFO L129 PetriNetUnfolder]: 25542/72327 cut-off events. [2021-11-13 19:00:55,702 INFO L130 PetriNetUnfolder]: For 1667512/1667652 co-relation queries the response was YES. [2021-11-13 19:00:57,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 484732 conditions, 72327 events. 25542/72327 cut-off events. For 1667512/1667652 co-relation queries the response was YES. Maximal size of possible extension queue 1470. Compared 906050 event pairs, 1453 based on Foata normal form. 362/72620 useless extension candidates. Maximal degree in co-relation 461627. Up to 21321 conditions per place. [2021-11-13 19:00:57,705 INFO L132 encePairwiseOnDemand]: 81/104 looper letters, 1846 selfloop transitions, 713 changer transitions 55/2677 dead transitions. [2021-11-13 19:00:57,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 2677 transitions, 35826 flow [2021-11-13 19:00:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-13 19:00:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-11-13 19:00:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 7993 transitions. [2021-11-13 19:00:57,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6513200782268579 [2021-11-13 19:00:57,723 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 7993 transitions. [2021-11-13 19:00:57,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 7993 transitions. [2021-11-13 19:00:57,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 19:00:57,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 7993 transitions. [2021-11-13 19:00:57,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 119 states, 118 states have (on average 67.73728813559322) internal successors, (7993), 118 states have internal predecessors, (7993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 19:00:57,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 119 states, 119 states have (on average 104.0) internal successors, (12376), 119 states have internal predecessors, (12376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 19:00:57,770 INFO L81 ComplementDD]: Finished complementDD. Result has 119 states, 119 states have (on average 104.0) internal successors, (12376), 119 states have internal predecessors, (12376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 19:00:57,770 INFO L186 Difference]: Start difference. First operand has 392 places, 544 transitions, 5492 flow. Second operand 118 states and 7993 transitions. [2021-11-13 19:00:57,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 2677 transitions, 35826 flow [2021-11-13 19:01:13,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 2677 transitions, 34078 flow, removed 628 selfloop flow, removed 16 redundant places. [2021-11-13 19:01:13,769 INFO L242 Difference]: Finished difference. Result has 523 places, 1247 transitions, 15322 flow [2021-11-13 19:01:13,770 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=15322, PETRI_PLACES=523, PETRI_TRANSITIONS=1247} [2021-11-13 19:01:13,771 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 431 predicate places. [2021-11-13 19:01:13,771 INFO L470 AbstractCegarLoop]: Abstraction has has 523 places, 1247 transitions, 15322 flow [2021-11-13 19:01:13,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 65.56410256410257) internal successors, (2557), 39 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 19:01:13,772 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 19:01:13,772 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 19:01:13,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 19:01:13,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 19:01:13,977 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 19:01:13,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 19:01:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1547930644, now seen corresponding path program 11 times [2021-11-13 19:01:13,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 19:01:13,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598963589] [2021-11-13 19:01:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 19:01:13,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 19:01:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 19:01:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 19:01:14,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 19:01:14,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598963589] [2021-11-13 19:01:14,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598963589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 19:01:14,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883388782] [2021-11-13 19:01:14,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 19:01:14,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 19:01:14,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 19:01:14,447 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 19:01:14,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b371e780-8766-4640-a274-6708b2c997a5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 19:01:14,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-13 19:01:14,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 19:01:14,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 19:01:14,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 19:01:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 19:01:16,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 19:01:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 19:01:31,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883388782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 19:01:31,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 19:01:31,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2021-11-13 19:01:31,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786631880] [2021-11-13 19:01:31,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 19:01:31,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 19:01:31,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 19:01:31,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 19:01:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1264, Unknown=4, NotChecked=0, Total=1406 [2021-11-13 19:01:31,354 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-11-13 19:01:31,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1247 transitions, 15322 flow. Second operand has 38 states, 38 states have (on average 65.63157894736842) internal successors, (2494), 38 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 19:01:31,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 19:01:31,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-11-13 19:01:31,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand