./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF --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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:37:38,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:37:38,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:37:38,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:37:38,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:37:38,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:37:38,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:37:38,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:37:38,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:37:38,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:37:38,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:37:38,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:37:38,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:37:38,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:37:38,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:37:38,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:37:38,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:37:38,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:37:38,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:37:38,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:37:38,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:37:38,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:37:38,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:37:38,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:37:38,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:37:38,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:37:38,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:37:38,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:37:38,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:37:38,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:37:38,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:37:38,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:37:38,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:37:38,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:37:38,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:37:38,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:37:38,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:37:38,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:37:38,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:37:38,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:37:38,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:37:38,793 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:37:38,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:37:38,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:37:38,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:37:38,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:37:38,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:37:38,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:37:38,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:37:38,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:37:38,828 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:37:38,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:37:38,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:37:38,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:37:38,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:37:38,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:37:38,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:37:38,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:37:38,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:37:38,831 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:37:38,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:37:38,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:37:38,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:37:38,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:37:38,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:37:38,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:37:38,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:37:38,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:37:38,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:37:38,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:37:38,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:37:38,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:37:38,835 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:37:38,835 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:37:38,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:37:38,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:37:38,836 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_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2021-11-20 06:37:39,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:37:39,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:37:39,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:37:39,151 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:37:39,152 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:37:39,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2021-11-20 06:37:39,240 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/data/3c2172681/82d4c1f4e9b740b9aba6d0e4b1868f95/FLAG3ab0cf95e [2021-11-20 06:37:39,822 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:37:39,823 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2021-11-20 06:37:39,831 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/data/3c2172681/82d4c1f4e9b740b9aba6d0e4b1868f95/FLAG3ab0cf95e [2021-11-20 06:37:40,176 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/data/3c2172681/82d4c1f4e9b740b9aba6d0e4b1868f95 [2021-11-20 06:37:40,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:37:40,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:37:40,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:37:40,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:37:40,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:37:40,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce75c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40, skipping insertion in model container [2021-11-20 06:37:40,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:37:40,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:37:40,465 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2021-11-20 06:37:40,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:37:40,479 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:37:40,504 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2021-11-20 06:37:40,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:37:40,523 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:37:40,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40 WrapperNode [2021-11-20 06:37:40,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:37:40,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:37:40,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:37:40,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:37:40,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,568 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2021-11-20 06:37:40,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:37:40,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:37:40,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:37:40,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:37:40,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:37:40,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:37:40,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:37:40,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:37:40,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (1/1) ... [2021-11-20 06:37:40,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:37:40,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:40,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:37:40,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:37:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:37:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 06:37:40,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 06:37:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 06:37:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 06:37:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:37:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:37:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:37:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-20 06:37:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-20 06:37:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:37:40,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:37:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:37:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:37:40,727 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 06:37:40,851 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:37:40,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:37:41,039 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:37:41,081 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:37:41,081 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 06:37:41,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:37:41 BoogieIcfgContainer [2021-11-20 06:37:41,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:37:41,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:37:41,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:37:41,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:37:41,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:37:40" (1/3) ... [2021-11-20 06:37:41,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6331beeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:37:41, skipping insertion in model container [2021-11-20 06:37:41,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:37:40" (2/3) ... [2021-11-20 06:37:41,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6331beeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:37:41, skipping insertion in model container [2021-11-20 06:37:41,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:37:41" (3/3) ... [2021-11-20 06:37:41,095 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2021-11-20 06:37:41,102 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 06:37:41,102 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:37:41,102 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:37:41,103 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 06:37:41,137 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,137 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,138 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,138 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,139 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,139 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,140 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,140 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,141 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,141 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,141 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,141 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,142 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,146 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,146 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,146 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,147 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,147 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,147 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,148 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,148 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,148 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,149 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,149 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,149 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,149 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,150 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,150 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,150 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,150 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,151 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,151 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,151 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,152 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,155 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,156 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,156 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,156 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,158 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:37:41,179 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 06:37:41,287 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:37:41,295 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 [2021-11-20 06:37:41,296 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 06:37:41,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2021-11-20 06:37:41,380 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2021-11-20 06:37:41,381 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:37:41,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2021-11-20 06:37:41,385 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2021-11-20 06:37:41,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2021-11-20 06:37:41,454 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2021-11-20 06:37:41,454 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:37:41,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:37:41,457 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:41,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:37:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash 752027129, now seen corresponding path program 1 times [2021-11-20 06:37:41,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:41,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541400149] [2021-11-20 06:37:41,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:41,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:42,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:42,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541400149] [2021-11-20 06:37:42,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541400149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:37:42,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:37:42,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:37:42,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628308191] [2021-11-20 06:37:42,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:37:42,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:37:42,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:37:42,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:37:42,102 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2021-11-20 06:37:42,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:42,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:37:42,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2021-11-20 06:37:42,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:37:42,306 INFO L129 PetriNetUnfolder]: 34/134 cut-off events. [2021-11-20 06:37:42,307 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-11-20 06:37:42,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 134 events. 34/134 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 294 event pairs, 9 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 136. Up to 49 conditions per place. [2021-11-20 06:37:42,312 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 20 selfloop transitions, 5 changer transitions 2/74 dead transitions. [2021-11-20 06:37:42,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 217 flow [2021-11-20 06:37:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:37:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 06:37:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 376 transitions. [2021-11-20 06:37:42,332 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2021-11-20 06:37:42,333 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 376 transitions. [2021-11-20 06:37:42,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 376 transitions. [2021-11-20 06:37:42,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:37:42,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 376 transitions. [2021-11-20 06:37:42,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 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) [2021-11-20 06:37:42,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:42,355 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:42,357 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 6 states and 376 transitions. [2021-11-20 06:37:42,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 217 flow [2021-11-20 06:37:42,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 06:37:42,367 INFO L242 Difference]: Finished difference. Result has 76 places, 68 transitions, 156 flow [2021-11-20 06:37:42,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2021-11-20 06:37:42,375 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2021-11-20 06:37:42,375 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 156 flow [2021-11-20 06:37:42,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:42,376 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:37:42,376 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] [2021-11-20 06:37:42,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:37:42,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:37:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash -676251899, now seen corresponding path program 1 times [2021-11-20 06:37:42,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:42,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993616245] [2021-11-20 06:37:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:42,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:42,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:42,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993616245] [2021-11-20 06:37:42,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993616245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:37:42,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:37:42,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:37:42,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963515042] [2021-11-20 06:37:42,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:37:42,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:37:42,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:42,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:37:42,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:37:42,593 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2021-11-20 06:37:42,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:42,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:37:42,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2021-11-20 06:37:42,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:37:42,806 INFO L129 PetriNetUnfolder]: 71/264 cut-off events. [2021-11-20 06:37:42,807 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2021-11-20 06:37:42,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 264 events. 71/264 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1082 event pairs, 32 based on Foata normal form. 6/253 useless extension candidates. Maximal degree in co-relation 254. Up to 87 conditions per place. [2021-11-20 06:37:42,812 INFO L132 encePairwiseOnDemand]: 77/84 looper letters, 27 selfloop transitions, 5 changer transitions 3/86 dead transitions. [2021-11-20 06:37:42,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 287 flow [2021-11-20 06:37:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:37:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 06:37:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 412 transitions. [2021-11-20 06:37:42,842 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8174603174603174 [2021-11-20 06:37:42,843 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 412 transitions. [2021-11-20 06:37:42,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 412 transitions. [2021-11-20 06:37:42,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:37:42,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 412 transitions. [2021-11-20 06:37:42,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.66666666666667) internal successors, (412), 6 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:42,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:42,854 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:42,854 INFO L186 Difference]: Start difference. First operand has 76 places, 68 transitions, 156 flow. Second operand 6 states and 412 transitions. [2021-11-20 06:37:42,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 287 flow [2021-11-20 06:37:42,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 86 transitions, 275 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 06:37:42,862 INFO L242 Difference]: Finished difference. Result has 78 places, 70 transitions, 176 flow [2021-11-20 06:37:42,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2021-11-20 06:37:42,864 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2021-11-20 06:37:42,864 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 176 flow [2021-11-20 06:37:42,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:42,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:37:42,865 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] [2021-11-20 06:37:42,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:37:42,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:37:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash -881410201, now seen corresponding path program 2 times [2021-11-20 06:37:42,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:42,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707523464] [2021-11-20 06:37:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:42,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:43,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:43,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707523464] [2021-11-20 06:37:43,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707523464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:43,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118872656] [2021-11-20 06:37:43,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:37:43,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:43,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:43,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:43,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:37:43,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 06:37:43,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:37:43,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:37:43,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:37:43,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:37:43,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118872656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:37:43,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:37:43,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-20 06:37:43,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606595317] [2021-11-20 06:37:43,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:37:43,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:37:43,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:37:43,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:37:43,710 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2021-11-20 06:37:43,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:43,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:37:43,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2021-11-20 06:37:43,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:37:43,997 INFO L129 PetriNetUnfolder]: 54/190 cut-off events. [2021-11-20 06:37:43,997 INFO L130 PetriNetUnfolder]: For 98/111 co-relation queries the response was YES. [2021-11-20 06:37:44,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 190 events. 54/190 cut-off events. For 98/111 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 590 event pairs, 26 based on Foata normal form. 13/199 useless extension candidates. Maximal degree in co-relation 232. Up to 73 conditions per place. [2021-11-20 06:37:44,006 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2021-11-20 06:37:44,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 76 transitions, 257 flow [2021-11-20 06:37:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:37:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-20 06:37:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2021-11-20 06:37:44,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2021-11-20 06:37:44,015 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2021-11-20 06:37:44,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2021-11-20 06:37:44,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:37:44,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2021-11-20 06:37:44,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:44,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:44,026 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:44,034 INFO L186 Difference]: Start difference. First operand has 78 places, 70 transitions, 176 flow. Second operand 8 states and 470 transitions. [2021-11-20 06:37:44,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 76 transitions, 257 flow [2021-11-20 06:37:44,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 241 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-11-20 06:37:44,044 INFO L242 Difference]: Finished difference. Result has 79 places, 69 transitions, 172 flow [2021-11-20 06:37:44,045 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2021-11-20 06:37:44,051 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2021-11-20 06:37:44,052 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 172 flow [2021-11-20 06:37:44,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:44,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:37:44,054 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] [2021-11-20 06:37:44,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:44,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:44,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:37:44,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash 987804623, now seen corresponding path program 1 times [2021-11-20 06:37:44,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:44,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414909592] [2021-11-20 06:37:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:44,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:44,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:44,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414909592] [2021-11-20 06:37:44,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414909592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:44,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802816232] [2021-11-20 06:37:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:44,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:44,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:44,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:44,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:37:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:44,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:37:44,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:45,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:45,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802816232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:45,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:37:45,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 16 [2021-11-20 06:37:45,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006244471] [2021-11-20 06:37:45,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:45,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:37:45,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:37:45,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:37:45,725 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2021-11-20 06:37:45,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 172 flow. Second operand has 16 states, 16 states have (on average 53.6875) internal successors, (859), 16 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:45,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:37:45,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2021-11-20 06:37:45,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:37:46,374 INFO L129 PetriNetUnfolder]: 227/679 cut-off events. [2021-11-20 06:37:46,375 INFO L130 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2021-11-20 06:37:46,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 679 events. 227/679 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3707 event pairs, 32 based on Foata normal form. 10/684 useless extension candidates. Maximal degree in co-relation 853. Up to 120 conditions per place. [2021-11-20 06:37:46,395 INFO L132 encePairwiseOnDemand]: 70/84 looper letters, 92 selfloop transitions, 29 changer transitions 16/177 dead transitions. [2021-11-20 06:37:46,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 177 transitions, 784 flow [2021-11-20 06:37:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:37:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 06:37:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1082 transitions. [2021-11-20 06:37:46,402 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6779448621553885 [2021-11-20 06:37:46,402 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1082 transitions. [2021-11-20 06:37:46,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1082 transitions. [2021-11-20 06:37:46,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:37:46,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1082 transitions. [2021-11-20 06:37:46,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:46,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:46,416 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:46,417 INFO L186 Difference]: Start difference. First operand has 79 places, 69 transitions, 172 flow. Second operand 19 states and 1082 transitions. [2021-11-20 06:37:46,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 177 transitions, 784 flow [2021-11-20 06:37:46,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 177 transitions, 751 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-11-20 06:37:46,430 INFO L242 Difference]: Finished difference. Result has 106 places, 94 transitions, 389 flow [2021-11-20 06:37:46,430 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=389, PETRI_PLACES=106, PETRI_TRANSITIONS=94} [2021-11-20 06:37:46,432 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 32 predicate places. [2021-11-20 06:37:46,432 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 94 transitions, 389 flow [2021-11-20 06:37:46,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.6875) internal successors, (859), 16 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:46,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:37:46,434 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] [2021-11-20 06:37:46,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:46,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:46,650 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:37:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1372272127, now seen corresponding path program 2 times [2021-11-20 06:37:46,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:46,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46960886] [2021-11-20 06:37:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:46,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:37:46,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:46,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46960886] [2021-11-20 06:37:46,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46960886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:46,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719316518] [2021-11-20 06:37:46,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:37:46,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:46,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:46,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:37:46,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:37:46,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:37:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:37:46,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:37:47,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:37:47,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719316518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:47,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:37:47,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-20 06:37:47,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999700243] [2021-11-20 06:37:47,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:47,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:37:47,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:37:47,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:37:47,978 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2021-11-20 06:37:47,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 94 transitions, 389 flow. Second operand has 10 states, 10 states have (on average 65.5) internal successors, (655), 10 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:47,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:37:47,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2021-11-20 06:37:47,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:37:48,284 INFO L129 PetriNetUnfolder]: 181/597 cut-off events. [2021-11-20 06:37:48,284 INFO L130 PetriNetUnfolder]: For 1329/1358 co-relation queries the response was YES. [2021-11-20 06:37:48,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1723 conditions, 597 events. 181/597 cut-off events. For 1329/1358 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3382 event pairs, 30 based on Foata normal form. 23/606 useless extension candidates. Maximal degree in co-relation 1693. Up to 166 conditions per place. [2021-11-20 06:37:48,294 INFO L132 encePairwiseOnDemand]: 77/84 looper letters, 41 selfloop transitions, 26 changer transitions 0/120 dead transitions. [2021-11-20 06:37:48,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 120 transitions, 671 flow [2021-11-20 06:37:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:37:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 06:37:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2021-11-20 06:37:48,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8163265306122449 [2021-11-20 06:37:48,298 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2021-11-20 06:37:48,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2021-11-20 06:37:48,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:37:48,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2021-11-20 06:37:48,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:48,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:48,303 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:48,304 INFO L186 Difference]: Start difference. First operand has 106 places, 94 transitions, 389 flow. Second operand 7 states and 480 transitions. [2021-11-20 06:37:48,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 120 transitions, 671 flow [2021-11-20 06:37:48,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 120 transitions, 657 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-11-20 06:37:48,318 INFO L242 Difference]: Finished difference. Result has 107 places, 103 transitions, 566 flow [2021-11-20 06:37:48,319 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=566, PETRI_PLACES=107, PETRI_TRANSITIONS=103} [2021-11-20 06:37:48,320 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 33 predicate places. [2021-11-20 06:37:48,320 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 103 transitions, 566 flow [2021-11-20 06:37:48,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.5) internal successors, (655), 10 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:48,321 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:37:48,322 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] [2021-11-20 06:37:48,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:48,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:48,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:37:48,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:48,538 INFO L85 PathProgramCache]: Analyzing trace with hash 876671123, now seen corresponding path program 3 times [2021-11-20 06:37:48,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:48,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159479620] [2021-11-20 06:37:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:48,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:48,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159479620] [2021-11-20 06:37:48,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159479620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:48,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944987130] [2021-11-20 06:37:48,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:37:48,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:48,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:48,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:48,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:37:49,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:37:49,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:37:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:37:49,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:49,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:50,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944987130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:50,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:37:50,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2021-11-20 06:37:50,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123858697] [2021-11-20 06:37:50,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:50,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:37:50,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:50,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:37:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:37:50,029 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 06:37:50,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 103 transitions, 566 flow. Second operand has 20 states, 20 states have (on average 53.75) internal successors, (1075), 20 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:50,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:37:50,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 06:37:50,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:37:52,872 INFO L129 PetriNetUnfolder]: 387/980 cut-off events. [2021-11-20 06:37:52,873 INFO L130 PetriNetUnfolder]: For 4857/4857 co-relation queries the response was YES. [2021-11-20 06:37:52,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3927 conditions, 980 events. 387/980 cut-off events. For 4857/4857 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5550 event pairs, 1 based on Foata normal form. 24/1004 useless extension candidates. Maximal degree in co-relation 3814. Up to 219 conditions per place. [2021-11-20 06:37:52,891 INFO L132 encePairwiseOnDemand]: 73/84 looper letters, 109 selfloop transitions, 165 changer transitions 5/320 dead transitions. [2021-11-20 06:37:52,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 320 transitions, 3079 flow [2021-11-20 06:37:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 06:37:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-20 06:37:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2170 transitions. [2021-11-20 06:37:52,903 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2021-11-20 06:37:52,904 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2170 transitions. [2021-11-20 06:37:52,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2170 transitions. [2021-11-20 06:37:52,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:37:52,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2170 transitions. [2021-11-20 06:37:52,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.64102564102564) internal successors, (2170), 39 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:52,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:52,930 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:52,930 INFO L186 Difference]: Start difference. First operand has 107 places, 103 transitions, 566 flow. Second operand 39 states and 2170 transitions. [2021-11-20 06:37:52,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 320 transitions, 3079 flow [2021-11-20 06:37:52,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 320 transitions, 2894 flow, removed 90 selfloop flow, removed 1 redundant places. [2021-11-20 06:37:52,981 INFO L242 Difference]: Finished difference. Result has 168 places, 239 transitions, 2430 flow [2021-11-20 06:37:52,982 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2430, PETRI_PLACES=168, PETRI_TRANSITIONS=239} [2021-11-20 06:37:52,985 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 94 predicate places. [2021-11-20 06:37:52,985 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 239 transitions, 2430 flow [2021-11-20 06:37:52,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.75) internal successors, (1075), 20 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:52,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:37:52,987 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] [2021-11-20 06:37:53,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:53,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:53,202 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:37:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1703313939, now seen corresponding path program 4 times [2021-11-20 06:37:53,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:53,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638755724] [2021-11-20 06:37:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:53,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:53,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:53,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638755724] [2021-11-20 06:37:53,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638755724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:53,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087270648] [2021-11-20 06:37:53,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:37:53,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:53,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:53,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:37:53,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:37:53,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:37:53,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:37:53,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:54,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:54,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087270648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:54,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:37:54,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-11-20 06:37:54,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646184432] [2021-11-20 06:37:54,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:54,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:37:54,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:37:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:37:54,701 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:37:54,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 239 transitions, 2430 flow. Second operand has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:54,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:37:54,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:37:54,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:37:55,927 INFO L129 PetriNetUnfolder]: 512/1393 cut-off events. [2021-11-20 06:37:55,927 INFO L130 PetriNetUnfolder]: For 20204/20215 co-relation queries the response was YES. [2021-11-20 06:37:55,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7718 conditions, 1393 events. 512/1393 cut-off events. For 20204/20215 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9280 event pairs, 17 based on Foata normal form. 7/1396 useless extension candidates. Maximal degree in co-relation 7499. Up to 317 conditions per place. [2021-11-20 06:37:55,965 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 142 selfloop transitions, 205 changer transitions 25/437 dead transitions. [2021-11-20 06:37:55,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 437 transitions, 5891 flow [2021-11-20 06:37:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:37:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-20 06:37:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1454 transitions. [2021-11-20 06:37:55,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7867965367965368 [2021-11-20 06:37:55,974 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1454 transitions. [2021-11-20 06:37:55,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1454 transitions. [2021-11-20 06:37:55,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:37:55,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1454 transitions. [2021-11-20 06:37:55,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.0909090909091) internal successors, (1454), 22 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:55,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:55,993 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:55,994 INFO L186 Difference]: Start difference. First operand has 168 places, 239 transitions, 2430 flow. Second operand 22 states and 1454 transitions. [2021-11-20 06:37:55,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 437 transitions, 5891 flow [2021-11-20 06:37:56,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 437 transitions, 5127 flow, removed 321 selfloop flow, removed 5 redundant places. [2021-11-20 06:37:56,191 INFO L242 Difference]: Finished difference. Result has 197 places, 370 transitions, 4663 flow [2021-11-20 06:37:56,192 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4663, PETRI_PLACES=197, PETRI_TRANSITIONS=370} [2021-11-20 06:37:56,192 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 123 predicate places. [2021-11-20 06:37:56,193 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 370 transitions, 4663 flow [2021-11-20 06:37:56,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:56,194 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:37:56,194 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] [2021-11-20 06:37:56,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:56,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:56,422 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:37:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash -704667827, now seen corresponding path program 5 times [2021-11-20 06:37:56,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:56,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394398297] [2021-11-20 06:37:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:56,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:56,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:56,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394398297] [2021-11-20 06:37:56,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394398297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:56,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040391868] [2021-11-20 06:37:56,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:37:56,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:56,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:56,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:56,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:37:56,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:37:56,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:37:56,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:37:56,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:57,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:58,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040391868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:58,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:37:58,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2021-11-20 06:37:58,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593779264] [2021-11-20 06:37:58,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:58,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:37:58,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:37:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:37:58,093 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:37:58,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 370 transitions, 4663 flow. Second operand has 22 states, 22 states have (on average 64.18181818181819) internal successors, (1412), 22 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:58,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:37:58,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:37:58,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:38:05,491 INFO L129 PetriNetUnfolder]: 634/1896 cut-off events. [2021-11-20 06:38:05,491 INFO L130 PetriNetUnfolder]: For 32550/32558 co-relation queries the response was YES. [2021-11-20 06:38:05,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10862 conditions, 1896 events. 634/1896 cut-off events. For 32550/32558 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14391 event pairs, 10 based on Foata normal form. 19/1905 useless extension candidates. Maximal degree in co-relation 10579. Up to 382 conditions per place. [2021-11-20 06:38:05,543 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 104 selfloop transitions, 475 changer transitions 35/679 dead transitions. [2021-11-20 06:38:05,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 679 transitions, 10574 flow [2021-11-20 06:38:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-20 06:38:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-11-20 06:38:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 5482 transitions. [2021-11-20 06:38:05,556 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7769274376417233 [2021-11-20 06:38:05,557 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 5482 transitions. [2021-11-20 06:38:05,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 5482 transitions. [2021-11-20 06:38:05,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:38:05,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 5482 transitions. [2021-11-20 06:38:05,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 65.26190476190476) internal successors, (5482), 84 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:05,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 84.0) internal successors, (7140), 85 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:05,596 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 84.0) internal successors, (7140), 85 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:05,596 INFO L186 Difference]: Start difference. First operand has 197 places, 370 transitions, 4663 flow. Second operand 84 states and 5482 transitions. [2021-11-20 06:38:05,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 679 transitions, 10574 flow [2021-11-20 06:38:05,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 679 transitions, 9690 flow, removed 425 selfloop flow, removed 4 redundant places. [2021-11-20 06:38:05,860 INFO L242 Difference]: Finished difference. Result has 286 places, 578 transitions, 8404 flow [2021-11-20 06:38:05,861 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=8404, PETRI_PLACES=286, PETRI_TRANSITIONS=578} [2021-11-20 06:38:05,867 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 212 predicate places. [2021-11-20 06:38:05,867 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 578 transitions, 8404 flow [2021-11-20 06:38:05,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.18181818181819) internal successors, (1412), 22 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:05,868 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:38:05,869 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] [2021-11-20 06:38:05,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:06,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 06:38:06,094 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:38:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:06,097 INFO L85 PathProgramCache]: Analyzing trace with hash -908973273, now seen corresponding path program 6 times [2021-11-20 06:38:06,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:06,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653471380] [2021-11-20 06:38:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:06,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:06,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653471380] [2021-11-20 06:38:06,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653471380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613608618] [2021-11-20 06:38:06,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:38:06,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:06,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:06,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:06,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:38:06,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 06:38:06,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:06,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:38:06,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:06,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:07,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613608618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:07,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:38:07,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-11-20 06:38:07,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104840071] [2021-11-20 06:38:07,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:07,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:38:07,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:07,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:38:07,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:38:07,490 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:38:07,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 578 transitions, 8404 flow. Second operand has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:07,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:38:07,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:38:07,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:38:10,942 INFO L129 PetriNetUnfolder]: 772/2157 cut-off events. [2021-11-20 06:38:10,942 INFO L130 PetriNetUnfolder]: For 29554/29563 co-relation queries the response was YES. [2021-11-20 06:38:10,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13459 conditions, 2157 events. 772/2157 cut-off events. For 29554/29563 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16195 event pairs, 15 based on Foata normal form. 9/2154 useless extension candidates. Maximal degree in co-relation 13166. Up to 467 conditions per place. [2021-11-20 06:38:11,004 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 215 selfloop transitions, 516 changer transitions 8/804 dead transitions. [2021-11-20 06:38:11,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 804 transitions, 13545 flow [2021-11-20 06:38:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 06:38:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-11-20 06:38:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3357 transitions. [2021-11-20 06:38:11,014 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7836134453781513 [2021-11-20 06:38:11,014 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3357 transitions. [2021-11-20 06:38:11,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3357 transitions. [2021-11-20 06:38:11,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:38:11,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3357 transitions. [2021-11-20 06:38:11,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 65.82352941176471) internal successors, (3357), 51 states have internal predecessors, (3357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:11,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:11,047 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:11,056 INFO L186 Difference]: Start difference. First operand has 286 places, 578 transitions, 8404 flow. Second operand 51 states and 3357 transitions. [2021-11-20 06:38:11,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 804 transitions, 13545 flow [2021-11-20 06:38:11,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 804 transitions, 12058 flow, removed 701 selfloop flow, removed 10 redundant places. [2021-11-20 06:38:11,505 INFO L242 Difference]: Finished difference. Result has 337 places, 739 transitions, 11812 flow [2021-11-20 06:38:11,507 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=7464, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=11812, PETRI_PLACES=337, PETRI_TRANSITIONS=739} [2021-11-20 06:38:11,508 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 263 predicate places. [2021-11-20 06:38:11,508 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 739 transitions, 11812 flow [2021-11-20 06:38:11,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:11,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:38:11,510 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] [2021-11-20 06:38:11,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:11,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:11,738 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:38:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash -889542779, now seen corresponding path program 7 times [2021-11-20 06:38:11,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:11,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066203087] [2021-11-20 06:38:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:11,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:12,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:12,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066203087] [2021-11-20 06:38:12,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066203087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761383972] [2021-11-20 06:38:12,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:38:12,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:12,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:12,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:12,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:38:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:38:12,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:12,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:13,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761383972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:13,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:38:13,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-11-20 06:38:13,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986068027] [2021-11-20 06:38:13,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:13,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:38:13,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:38:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:38:13,638 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:38:13,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 739 transitions, 11812 flow. Second operand has 18 states, 18 states have (on average 64.33333333333333) internal successors, (1158), 18 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:13,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:38:13,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:38:13,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:38:17,138 INFO L129 PetriNetUnfolder]: 1132/3306 cut-off events. [2021-11-20 06:38:17,139 INFO L130 PetriNetUnfolder]: For 31536/31543 co-relation queries the response was YES. [2021-11-20 06:38:17,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20706 conditions, 3306 events. 1132/3306 cut-off events. For 31536/31543 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 28046 event pairs, 35 based on Foata normal form. 38/3322 useless extension candidates. Maximal degree in co-relation 19919. Up to 587 conditions per place. [2021-11-20 06:38:17,239 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 281 selfloop transitions, 846 changer transitions 0/1192 dead transitions. [2021-11-20 06:38:17,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1192 transitions, 21390 flow [2021-11-20 06:38:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 06:38:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-20 06:38:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2654 transitions. [2021-11-20 06:38:17,246 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7898809523809524 [2021-11-20 06:38:17,246 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2654 transitions. [2021-11-20 06:38:17,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2654 transitions. [2021-11-20 06:38:17,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:38:17,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2654 transitions. [2021-11-20 06:38:17,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 66.35) internal successors, (2654), 40 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:17,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:17,343 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:17,343 INFO L186 Difference]: Start difference. First operand has 337 places, 739 transitions, 11812 flow. Second operand 40 states and 2654 transitions. [2021-11-20 06:38:17,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1192 transitions, 21390 flow [2021-11-20 06:38:17,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1192 transitions, 21108 flow, removed 100 selfloop flow, removed 9 redundant places. [2021-11-20 06:38:17,921 INFO L242 Difference]: Finished difference. Result has 383 places, 1093 transitions, 21248 flow [2021-11-20 06:38:17,922 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=11663, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=21248, PETRI_PLACES=383, PETRI_TRANSITIONS=1093} [2021-11-20 06:38:17,923 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 309 predicate places. [2021-11-20 06:38:17,923 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 1093 transitions, 21248 flow [2021-11-20 06:38:17,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.33333333333333) internal successors, (1158), 18 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:17,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:38:17,924 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] [2021-11-20 06:38:17,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:18,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:38:18,125 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:38:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:18,126 INFO L85 PathProgramCache]: Analyzing trace with hash 258264347, now seen corresponding path program 8 times [2021-11-20 06:38:18,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:18,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347879112] [2021-11-20 06:38:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:18,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:18,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:18,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347879112] [2021-11-20 06:38:18,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347879112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:18,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946585057] [2021-11-20 06:38:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:38:18,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:18,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:18,410 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:18,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:38:18,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:38:18,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:18,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:38:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:19,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:19,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946585057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:19,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:38:19,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2021-11-20 06:38:19,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640925698] [2021-11-20 06:38:19,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:19,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:38:19,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:19,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:38:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:38:19,966 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:38:19,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1093 transitions, 21248 flow. Second operand has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:19,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:38:19,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:38:19,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:38:26,589 INFO L129 PetriNetUnfolder]: 1423/4400 cut-off events. [2021-11-20 06:38:26,589 INFO L130 PetriNetUnfolder]: For 54851/54860 co-relation queries the response was YES. [2021-11-20 06:38:26,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30447 conditions, 4400 events. 1423/4400 cut-off events. For 54851/54860 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 40663 event pairs, 35 based on Foata normal form. 46/4425 useless extension candidates. Maximal degree in co-relation 29768. Up to 736 conditions per place. [2021-11-20 06:38:26,712 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 255 selfloop transitions, 1190 changer transitions 4/1514 dead transitions. [2021-11-20 06:38:26,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1514 transitions, 31871 flow [2021-11-20 06:38:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-20 06:38:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-11-20 06:38:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4529 transitions. [2021-11-20 06:38:26,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7814009661835749 [2021-11-20 06:38:26,721 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4529 transitions. [2021-11-20 06:38:26,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4529 transitions. [2021-11-20 06:38:26,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:38:26,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4529 transitions. [2021-11-20 06:38:26,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 65.6376811594203) internal successors, (4529), 69 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:26,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:26,747 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 84.0) internal successors, (5880), 70 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:26,747 INFO L186 Difference]: Start difference. First operand has 383 places, 1093 transitions, 21248 flow. Second operand 69 states and 4529 transitions. [2021-11-20 06:38:26,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1514 transitions, 31871 flow [2021-11-20 06:38:28,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1514 transitions, 31393 flow, removed 227 selfloop flow, removed 4 redundant places. [2021-11-20 06:38:28,185 INFO L242 Difference]: Finished difference. Result has 470 places, 1419 transitions, 31638 flow [2021-11-20 06:38:28,187 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20984, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=892, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=31638, PETRI_PLACES=470, PETRI_TRANSITIONS=1419} [2021-11-20 06:38:28,188 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 396 predicate places. [2021-11-20 06:38:28,188 INFO L470 AbstractCegarLoop]: Abstraction has has 470 places, 1419 transitions, 31638 flow [2021-11-20 06:38:28,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:28,189 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:38:28,190 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] [2021-11-20 06:38:28,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:28,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:38:28,399 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:38:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:28,400 INFO L85 PathProgramCache]: Analyzing trace with hash -58077929, now seen corresponding path program 9 times [2021-11-20 06:38:28,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:28,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6741263] [2021-11-20 06:38:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:28,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:28,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:28,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6741263] [2021-11-20 06:38:28,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6741263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:28,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994916793] [2021-11-20 06:38:28,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:38:28,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:28,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:28,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:28,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:38:28,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:38:28,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:38:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:29,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:29,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994916793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:29,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:38:29,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 22 [2021-11-20 06:38:29,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512943870] [2021-11-20 06:38:29,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:29,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:38:29,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:29,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:38:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:38:29,700 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 06:38:29,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 1419 transitions, 31638 flow. Second operand has 22 states, 22 states have (on average 53.86363636363637) internal successors, (1185), 22 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:29,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:38:29,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 06:38:29,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:38:36,238 INFO L129 PetriNetUnfolder]: 1681/4941 cut-off events. [2021-11-20 06:38:36,238 INFO L130 PetriNetUnfolder]: For 84544/84544 co-relation queries the response was YES. [2021-11-20 06:38:36,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40019 conditions, 4941 events. 1681/4941 cut-off events. For 84544/84544 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 45667 event pairs, 82 based on Foata normal form. 51/4972 useless extension candidates. Maximal degree in co-relation 39823. Up to 898 conditions per place. [2021-11-20 06:38:36,376 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 348 selfloop transitions, 1326 changer transitions 1/1716 dead transitions. [2021-11-20 06:38:36,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 1716 transitions, 41318 flow [2021-11-20 06:38:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 06:38:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-11-20 06:38:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2802 transitions. [2021-11-20 06:38:36,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.65406162464986 [2021-11-20 06:38:36,383 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2802 transitions. [2021-11-20 06:38:36,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2802 transitions. [2021-11-20 06:38:36,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:38:36,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2802 transitions. [2021-11-20 06:38:36,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 54.94117647058823) internal successors, (2802), 51 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:36,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:36,401 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:36,401 INFO L186 Difference]: Start difference. First operand has 470 places, 1419 transitions, 31638 flow. Second operand 51 states and 2802 transitions. [2021-11-20 06:38:36,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 1716 transitions, 41318 flow [2021-11-20 06:38:38,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 1716 transitions, 40806 flow, removed 142 selfloop flow, removed 16 redundant places. [2021-11-20 06:38:38,967 INFO L242 Difference]: Finished difference. Result has 522 places, 1639 transitions, 41230 flow [2021-11-20 06:38:38,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=30983, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=41230, PETRI_PLACES=522, PETRI_TRANSITIONS=1639} [2021-11-20 06:38:38,971 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 448 predicate places. [2021-11-20 06:38:38,971 INFO L470 AbstractCegarLoop]: Abstraction has has 522 places, 1639 transitions, 41230 flow [2021-11-20 06:38:38,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.86363636363637) internal successors, (1185), 22 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:38,972 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:38:38,972 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] [2021-11-20 06:38:39,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:39,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:39,193 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:38:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1510704073, now seen corresponding path program 10 times [2021-11-20 06:38:39,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:39,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736324226] [2021-11-20 06:38:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:39,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:39,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:39,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736324226] [2021-11-20 06:38:39,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736324226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:39,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553994192] [2021-11-20 06:38:39,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:38:39,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:39,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:39,442 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:39,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:38:39,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:38:39,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:39,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:38:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:39,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:41,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553994192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:41,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:38:41,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-11-20 06:38:41,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102159739] [2021-11-20 06:38:41,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:41,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:38:41,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:41,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:38:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:38:41,064 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:38:41,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1639 transitions, 41230 flow. Second operand has 18 states, 18 states have (on average 64.27777777777777) internal successors, (1157), 18 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:41,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:38:41,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:38:41,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:38:51,162 INFO L129 PetriNetUnfolder]: 2042/6507 cut-off events. [2021-11-20 06:38:51,163 INFO L130 PetriNetUnfolder]: For 128477/128501 co-relation queries the response was YES. [2021-11-20 06:38:51,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55994 conditions, 6507 events. 2042/6507 cut-off events. For 128477/128501 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 66624 event pairs, 54 based on Foata normal form. 77/6551 useless extension candidates. Maximal degree in co-relation 55770. Up to 1056 conditions per place. [2021-11-20 06:38:51,374 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 393 selfloop transitions, 1729 changer transitions 6/2195 dead transitions. [2021-11-20 06:38:51,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 2195 transitions, 59729 flow [2021-11-20 06:38:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-20 06:38:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-11-20 06:38:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4691 transitions. [2021-11-20 06:38:51,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7865526492287056 [2021-11-20 06:38:51,382 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4691 transitions. [2021-11-20 06:38:51,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4691 transitions. [2021-11-20 06:38:51,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:38:51,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4691 transitions. [2021-11-20 06:38:51,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 66.07042253521126) internal successors, (4691), 71 states have internal predecessors, (4691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:51,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:51,409 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:51,409 INFO L186 Difference]: Start difference. First operand has 522 places, 1639 transitions, 41230 flow. Second operand 71 states and 4691 transitions. [2021-11-20 06:38:51,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 2195 transitions, 59729 flow [2021-11-20 06:38:55,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2195 transitions, 59040 flow, removed 193 selfloop flow, removed 15 redundant places. [2021-11-20 06:38:55,629 INFO L242 Difference]: Finished difference. Result has 594 places, 2088 transitions, 59086 flow [2021-11-20 06:38:55,632 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=40367, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=59086, PETRI_PLACES=594, PETRI_TRANSITIONS=2088} [2021-11-20 06:38:55,634 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 520 predicate places. [2021-11-20 06:38:55,634 INFO L470 AbstractCegarLoop]: Abstraction has has 594 places, 2088 transitions, 59086 flow [2021-11-20 06:38:55,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.27777777777777) internal successors, (1157), 18 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:55,635 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:38:55,636 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] [2021-11-20 06:38:55,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:55,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:38:55,850 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:38:55,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:55,850 INFO L85 PathProgramCache]: Analyzing trace with hash -871837869, now seen corresponding path program 11 times [2021-11-20 06:38:55,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:55,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992017587] [2021-11-20 06:38:55,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:55,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:56,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:56,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992017587] [2021-11-20 06:38:56,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992017587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:56,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34134078] [2021-11-20 06:38:56,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:38:56,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:56,070 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:56,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:38:56,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-20 06:38:56,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:56,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:38:56,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:56,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34134078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:57,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:38:57,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2021-11-20 06:38:57,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230614122] [2021-11-20 06:38:57,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:57,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:38:57,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:57,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:38:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:38:57,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:38:57,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 2088 transitions, 59086 flow. Second operand has 21 states, 21 states have (on average 63.904761904761905) internal successors, (1342), 21 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:57,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:38:57,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:38:57,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:39:07,609 INFO L129 PetriNetUnfolder]: 2385/7743 cut-off events. [2021-11-20 06:39:07,609 INFO L130 PetriNetUnfolder]: For 201374/201403 co-relation queries the response was YES. [2021-11-20 06:39:07,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73361 conditions, 7743 events. 2385/7743 cut-off events. For 201374/201403 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 82185 event pairs, 39 based on Foata normal form. 25/7749 useless extension candidates. Maximal degree in co-relation 73112. Up to 1344 conditions per place. [2021-11-20 06:39:07,882 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 522 selfloop transitions, 1986 changer transitions 3/2578 dead transitions. [2021-11-20 06:39:07,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 2578 transitions, 79160 flow [2021-11-20 06:39:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 06:39:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-20 06:39:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2734 transitions. [2021-11-20 06:39:07,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7749433106575964 [2021-11-20 06:39:07,888 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2734 transitions. [2021-11-20 06:39:07,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2734 transitions. [2021-11-20 06:39:07,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:39:07,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2734 transitions. [2021-11-20 06:39:07,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 65.0952380952381) internal successors, (2734), 42 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:07,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:07,911 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:07,911 INFO L186 Difference]: Start difference. First operand has 594 places, 2088 transitions, 59086 flow. Second operand 42 states and 2734 transitions. [2021-11-20 06:39:07,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 2578 transitions, 79160 flow [2021-11-20 06:39:14,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 2578 transitions, 78238 flow, removed 275 selfloop flow, removed 24 redundant places. [2021-11-20 06:39:15,059 INFO L242 Difference]: Finished difference. Result has 623 places, 2559 transitions, 80326 flow [2021-11-20 06:39:15,062 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=58324, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=80326, PETRI_PLACES=623, PETRI_TRANSITIONS=2559} [2021-11-20 06:39:15,063 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 549 predicate places. [2021-11-20 06:39:15,063 INFO L470 AbstractCegarLoop]: Abstraction has has 623 places, 2559 transitions, 80326 flow [2021-11-20 06:39:15,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.904761904761905) internal successors, (1342), 21 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:15,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:39:15,064 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] [2021-11-20 06:39:15,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:15,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:15,286 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:39:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash 729267977, now seen corresponding path program 12 times [2021-11-20 06:39:15,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:15,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140740384] [2021-11-20 06:39:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:15,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:39:15,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:15,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140740384] [2021-11-20 06:39:15,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140740384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:15,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520622992] [2021-11-20 06:39:15,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:39:15,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:15,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:15,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:15,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:39:15,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 06:39:15,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:15,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:39:15,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:39:16,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:39:16,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520622992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:16,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:39:16,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2021-11-20 06:39:16,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069502340] [2021-11-20 06:39:16,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:16,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:39:16,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:16,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:39:16,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:39:16,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:39:16,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 2559 transitions, 80326 flow. Second operand has 17 states, 17 states have (on average 64.11764705882354) internal successors, (1090), 17 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:16,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:39:16,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:39:16,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:39:30,576 INFO L129 PetriNetUnfolder]: 2548/8035 cut-off events. [2021-11-20 06:39:30,576 INFO L130 PetriNetUnfolder]: For 247971/248035 co-relation queries the response was YES. [2021-11-20 06:39:30,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84061 conditions, 8035 events. 2548/8035 cut-off events. For 247971/248035 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 84863 event pairs, 67 based on Foata normal form. 56/8063 useless extension candidates. Maximal degree in co-relation 83799. Up to 1472 conditions per place. [2021-11-20 06:39:30,925 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 370 selfloop transitions, 2336 changer transitions 12/2785 dead transitions. [2021-11-20 06:39:30,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 683 places, 2785 transitions, 92886 flow [2021-11-20 06:39:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-20 06:39:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-11-20 06:39:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4240 transitions. [2021-11-20 06:39:30,934 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7765567765567766 [2021-11-20 06:39:30,935 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4240 transitions. [2021-11-20 06:39:30,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4240 transitions. [2021-11-20 06:39:30,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:39:30,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4240 transitions. [2021-11-20 06:39:30,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 65.23076923076923) internal successors, (4240), 65 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:30,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 84.0) internal successors, (5544), 66 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:30,960 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 84.0) internal successors, (5544), 66 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:30,961 INFO L186 Difference]: Start difference. First operand has 623 places, 2559 transitions, 80326 flow. Second operand 65 states and 4240 transitions. [2021-11-20 06:39:30,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 683 places, 2785 transitions, 92886 flow [2021-11-20 06:39:39,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2785 transitions, 92349 flow, removed 155 selfloop flow, removed 14 redundant places. [2021-11-20 06:39:39,911 INFO L242 Difference]: Finished difference. Result has 678 places, 2754 transitions, 93209 flow [2021-11-20 06:39:39,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=79471, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=93209, PETRI_PLACES=678, PETRI_TRANSITIONS=2754} [2021-11-20 06:39:39,914 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 604 predicate places. [2021-11-20 06:39:39,914 INFO L470 AbstractCegarLoop]: Abstraction has has 678 places, 2754 transitions, 93209 flow [2021-11-20 06:39:39,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.11764705882354) internal successors, (1090), 17 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:39,915 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:39:39,915 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] [2021-11-20 06:39:39,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:40,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:39:40,142 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:39:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1447507389, now seen corresponding path program 13 times [2021-11-20 06:39:40,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:40,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085592350] [2021-11-20 06:39:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:40,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:39:40,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:40,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085592350] [2021-11-20 06:39:40,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085592350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:40,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329380068] [2021-11-20 06:39:40,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:39:40,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:40,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:40,361 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:40,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:39:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:40,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:39:40,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:39:40,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:39:41,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329380068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:41,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:39:41,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 22 [2021-11-20 06:39:41,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079415543] [2021-11-20 06:39:41,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:41,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:39:41,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:39:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:39:41,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 06:39:41,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 2754 transitions, 93209 flow. Second operand has 22 states, 22 states have (on average 53.86363636363637) internal successors, (1185), 22 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:41,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:39:41,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 06:39:41,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:40:01,168 INFO L129 PetriNetUnfolder]: 3321/9652 cut-off events. [2021-11-20 06:40:01,168 INFO L130 PetriNetUnfolder]: For 355146/355146 co-relation queries the response was YES. [2021-11-20 06:40:01,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114507 conditions, 9652 events. 3321/9652 cut-off events. For 355146/355146 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 101457 event pairs, 160 based on Foata normal form. 124/9740 useless extension candidates. Maximal degree in co-relation 114232. Up to 2088 conditions per place. [2021-11-20 06:40:01,546 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 932 selfloop transitions, 2831 changer transitions 17/3821 dead transitions. [2021-11-20 06:40:01,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 719 places, 3821 transitions, 137383 flow [2021-11-20 06:40:01,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 06:40:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-11-20 06:40:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2752 transitions. [2021-11-20 06:40:01,551 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6686103012633625 [2021-11-20 06:40:01,552 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2752 transitions. [2021-11-20 06:40:01,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2752 transitions. [2021-11-20 06:40:01,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:40:01,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2752 transitions. [2021-11-20 06:40:01,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 56.16326530612245) internal successors, (2752), 49 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:01,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:01,568 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:01,569 INFO L186 Difference]: Start difference. First operand has 678 places, 2754 transitions, 93209 flow. Second operand 49 states and 2752 transitions. [2021-11-20 06:40:01,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 719 places, 3821 transitions, 137383 flow [2021-11-20 06:40:15,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 3821 transitions, 135654 flow, removed 185 selfloop flow, removed 38 redundant places. [2021-11-20 06:40:15,354 INFO L242 Difference]: Finished difference. Result has 714 places, 3569 transitions, 133294 flow [2021-11-20 06:40:15,357 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=91602, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2050, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=133294, PETRI_PLACES=714, PETRI_TRANSITIONS=3569} [2021-11-20 06:40:15,357 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 640 predicate places. [2021-11-20 06:40:15,358 INFO L470 AbstractCegarLoop]: Abstraction has has 714 places, 3569 transitions, 133294 flow [2021-11-20 06:40:15,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.86363636363637) internal successors, (1185), 22 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:15,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:40:15,359 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] [2021-11-20 06:40:15,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-20 06:40:15,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:40:15,570 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:40:15,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1556217329, now seen corresponding path program 14 times [2021-11-20 06:40:15,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:15,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837217423] [2021-11-20 06:40:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:15,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:15,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:15,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837217423] [2021-11-20 06:40:15,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837217423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:40:15,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747180674] [2021-11-20 06:40:15,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:40:15,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:15,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:15,722 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:15,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:40:15,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:40:15,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:40:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:16,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:17,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747180674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:17,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:40:17,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 23 [2021-11-20 06:40:17,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138823825] [2021-11-20 06:40:17,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:17,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:40:17,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:17,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:40:17,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:40:17,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:40:17,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 3569 transitions, 133294 flow. Second operand has 23 states, 23 states have (on average 64.0) internal successors, (1472), 23 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:17,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:40:17,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:40:17,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:40:38,781 INFO L129 PetriNetUnfolder]: 3185/9464 cut-off events. [2021-11-20 06:40:38,781 INFO L130 PetriNetUnfolder]: For 399320/399413 co-relation queries the response was YES. [2021-11-20 06:40:39,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120333 conditions, 9464 events. 3185/9464 cut-off events. For 399320/399413 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 100706 event pairs, 151 based on Foata normal form. 90/9525 useless extension candidates. Maximal degree in co-relation 119988. Up to 1860 conditions per place. [2021-11-20 06:40:39,396 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1143 selfloop transitions, 2426 changer transitions 7/3648 dead transitions. [2021-11-20 06:40:39,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 3648 transitions, 142984 flow [2021-11-20 06:40:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 06:40:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-20 06:40:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2419 transitions. [2021-11-20 06:40:39,399 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7783140283140283 [2021-11-20 06:40:39,399 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2419 transitions. [2021-11-20 06:40:39,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2419 transitions. [2021-11-20 06:40:39,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:40:39,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2419 transitions. [2021-11-20 06:40:39,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.37837837837837) internal successors, (2419), 37 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:39,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:39,411 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:39,411 INFO L186 Difference]: Start difference. First operand has 714 places, 3569 transitions, 133294 flow. Second operand 37 states and 2419 transitions. [2021-11-20 06:40:39,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 3648 transitions, 142984 flow [2021-11-20 06:40:56,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 744 places, 3648 transitions, 142182 flow, removed 366 selfloop flow, removed 6 redundant places. [2021-11-20 06:40:56,240 INFO L242 Difference]: Finished difference. Result has 751 places, 3622 transitions, 143133 flow [2021-11-20 06:40:56,243 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=132292, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=143133, PETRI_PLACES=751, PETRI_TRANSITIONS=3622} [2021-11-20 06:40:56,244 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 677 predicate places. [2021-11-20 06:40:56,244 INFO L470 AbstractCegarLoop]: Abstraction has has 751 places, 3622 transitions, 143133 flow [2021-11-20 06:40:56,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.0) internal successors, (1472), 23 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:56,244 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:40:56,244 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] [2021-11-20 06:40:56,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:56,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:40:56,446 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:40:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash -348135255, now seen corresponding path program 15 times [2021-11-20 06:40:56,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:56,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30030004] [2021-11-20 06:40:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:56,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:56,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30030004] [2021-11-20 06:40:56,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30030004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:40:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016051511] [2021-11-20 06:40:56,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:40:56,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:56,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:56,672 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:56,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:40:56,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:40:56,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:40:56,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:57,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016051511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:57,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:40:57,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2021-11-20 06:40:57,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117466217] [2021-11-20 06:40:57,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:57,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:40:57,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:40:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:40:57,817 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:40:57,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 3622 transitions, 143133 flow. Second operand has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:57,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:40:57,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:40:57,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:41:20,263 INFO L129 PetriNetUnfolder]: 3177/9458 cut-off events. [2021-11-20 06:41:20,264 INFO L130 PetriNetUnfolder]: For 440394/440469 co-relation queries the response was YES. [2021-11-20 06:41:20,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126504 conditions, 9458 events. 3177/9458 cut-off events. For 440394/440469 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 100675 event pairs, 146 based on Foata normal form. 67/9495 useless extension candidates. Maximal degree in co-relation 126140. Up to 1861 conditions per place. [2021-11-20 06:41:20,741 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 563 selfloop transitions, 3073 changer transitions 5/3713 dead transitions. [2021-11-20 06:41:20,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 3713 transitions, 153058 flow [2021-11-20 06:41:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 06:41:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-20 06:41:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2698 transitions. [2021-11-20 06:41:20,745 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7833914053426249 [2021-11-20 06:41:20,746 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2698 transitions. [2021-11-20 06:41:20,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2698 transitions. [2021-11-20 06:41:20,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:41:20,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2698 transitions. [2021-11-20 06:41:20,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 65.8048780487805) internal successors, (2698), 41 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:20,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:20,759 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:20,760 INFO L186 Difference]: Start difference. First operand has 751 places, 3622 transitions, 143133 flow. Second operand 41 states and 2698 transitions. [2021-11-20 06:41:20,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 3713 transitions, 153058 flow [2021-11-20 06:41:39,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 773 places, 3713 transitions, 152038 flow, removed 87 selfloop flow, removed 13 redundant places. [2021-11-20 06:41:39,333 INFO L242 Difference]: Finished difference. Result has 778 places, 3662 transitions, 151969 flow [2021-11-20 06:41:39,338 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142008, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3030, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=151969, PETRI_PLACES=778, PETRI_TRANSITIONS=3662} [2021-11-20 06:41:39,339 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 704 predicate places. [2021-11-20 06:41:39,339 INFO L470 AbstractCegarLoop]: Abstraction has has 778 places, 3662 transitions, 151969 flow [2021-11-20 06:41:39,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:39,340 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:41:39,341 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] [2021-11-20 06:41:39,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:39,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:41:39,566 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:41:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash 201462761, now seen corresponding path program 16 times [2021-11-20 06:41:39,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:39,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824582503] [2021-11-20 06:41:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:39,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:39,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824582503] [2021-11-20 06:41:39,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824582503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:39,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108572303] [2021-11-20 06:41:39,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:41:39,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:39,790 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:39,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:41:39,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:41:39,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:39,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:41:39,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:40,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:40,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108572303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:40,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:40,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2021-11-20 06:41:40,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625916120] [2021-11-20 06:41:40,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:40,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:41:40,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:40,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:41:40,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:41:40,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-11-20 06:41:40,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 3662 transitions, 151969 flow. Second operand has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:40,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:41:40,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-11-20 06:41:40,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:42:03,770 INFO L129 PetriNetUnfolder]: 3204/9452 cut-off events. [2021-11-20 06:42:03,770 INFO L130 PetriNetUnfolder]: For 472652/472816 co-relation queries the response was YES. [2021-11-20 06:42:04,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132719 conditions, 9452 events. 3204/9452 cut-off events. For 472652/472816 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 100219 event pairs, 145 based on Foata normal form. 146/9569 useless extension candidates. Maximal degree in co-relation 132347. Up to 1890 conditions per place. [2021-11-20 06:42:04,220 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 900 selfloop transitions, 2794 changer transitions 6/3772 dead transitions. [2021-11-20 06:42:04,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 3772 transitions, 162816 flow [2021-11-20 06:42:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:42:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-20 06:42:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2113 transitions. [2021-11-20 06:42:04,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7860863095238095 [2021-11-20 06:42:04,223 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2113 transitions. [2021-11-20 06:42:04,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2113 transitions. [2021-11-20 06:42:04,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:42:04,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2113 transitions. [2021-11-20 06:42:04,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.03125) internal successors, (2113), 32 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:04,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:04,234 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:04,234 INFO L186 Difference]: Start difference. First operand has 778 places, 3662 transitions, 151969 flow. Second operand 32 states and 2113 transitions. [2021-11-20 06:42:04,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 3772 transitions, 162816 flow [2021-11-20 06:42:23,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 3772 transitions, 160535 flow, removed 330 selfloop flow, removed 26 redundant places. [2021-11-20 06:42:24,183 INFO L242 Difference]: Finished difference. Result has 785 places, 3737 transitions, 160177 flow [2021-11-20 06:42:24,187 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=149552, PETRI_DIFFERENCE_MINUEND_PLACES=750, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2710, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=872, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=160177, PETRI_PLACES=785, PETRI_TRANSITIONS=3737} [2021-11-20 06:42:24,188 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 711 predicate places. [2021-11-20 06:42:24,188 INFO L470 AbstractCegarLoop]: Abstraction has has 785 places, 3737 transitions, 160177 flow [2021-11-20 06:42:24,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.10526315789474) internal successors, (1218), 19 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:24,188 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:42:24,188 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] [2021-11-20 06:42:24,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:24,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:24,389 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:42:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1242634165, now seen corresponding path program 17 times [2021-11-20 06:42:24,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:24,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552496068] [2021-11-20 06:42:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:24,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:24,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552496068] [2021-11-20 06:42:24,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552496068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744625290] [2021-11-20 06:42:24,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:42:24,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:24,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:24,653 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:24,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c74402-802c-4a59-b916-ff9dd4b5afd5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:42:24,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:42:24,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:24,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:42:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:25,169 INFO L328 TraceCheckSpWp]: Computing backward predicates...