./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be --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 1407490331f8475e05da38b816bc6575d3c1d2921101f89ed20766f8369edeba .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:45:27,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:45:27,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:45:27,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:45:27,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:45:27,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:45:27,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:45:27,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:45:27,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:45:27,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:45:27,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:45:27,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:45:27,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:45:27,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:45:27,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:45:27,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:45:27,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:45:27,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:45:27,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:45:27,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:45:27,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:45:27,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:45:27,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:45:27,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:45:27,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:45:27,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:45:27,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:45:27,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:45:27,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:45:27,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:45:27,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:45:27,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:45:27,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:45:27,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:45:27,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:45:27,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:45:27,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:45:27,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:45:27,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:45:27,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:45:27,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:45:27,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:45:27,804 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:45:27,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:45:27,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:45:27,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:45:27,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:45:27,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:45:27,807 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:45:27,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:45:27,808 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:45:27,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:45:27,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:45:27,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:45:27,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:45:27,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:45:27,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:45:27,810 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:45:27,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:45:27,810 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:45:27,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:45:27,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:45:27,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:45:27,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:45:27,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:45:27,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:45:27,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:45:27,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:45:27,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:45:27,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:45:27,813 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:45:27,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:45:27,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:45:27,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:45:27,814 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_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1407490331f8475e05da38b816bc6575d3c1d2921101f89ed20766f8369edeba [2021-10-21 19:45:28,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:45:28,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:45:28,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:45:28,166 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:45:28,167 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:45:28,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2021-10-21 19:45:28,242 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/data/edaa76415/f38867c6bef146878618bafe0d63982a/FLAGd5b077462 [2021-10-21 19:45:28,811 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:45:28,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2021-10-21 19:45:28,827 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/data/edaa76415/f38867c6bef146878618bafe0d63982a/FLAGd5b077462 [2021-10-21 19:45:29,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/data/edaa76415/f38867c6bef146878618bafe0d63982a [2021-10-21 19:45:29,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:45:29,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:45:29,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:45:29,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:45:29,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:45:29,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0b60fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29, skipping insertion in model container [2021-10-21 19:45:29,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:45:29,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:45:29,410 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2600,2613] [2021-10-21 19:45:29,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:45:29,422 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:45:29,447 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2600,2613] [2021-10-21 19:45:29,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:45:29,462 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:45:29,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29 WrapperNode [2021-10-21 19:45:29,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:45:29,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:45:29,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:45:29,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:45:29,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:45:29,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:45:29,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:45:29,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:45:29,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:45:29,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:45:29,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:45:29,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:45:29,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (1/1) ... [2021-10-21 19:45:29,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:45:29,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:29,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:45:29,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:45:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-21 19:45:29,674 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-21 19:45:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-21 19:45:29,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-21 19:45:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-21 19:45:29,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-21 19:45:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:45:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:45:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:45:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-21 19:45:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-21 19:45:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:45:29,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:45:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:45:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:45:29,679 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-21 19:45:30,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:45:30,106 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-21 19:45:30,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:45:30 BoogieIcfgContainer [2021-10-21 19:45:30,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:45:30,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:45:30,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:45:30,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:45:30,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:45:29" (1/3) ... [2021-10-21 19:45:30,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b7f4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:45:30, skipping insertion in model container [2021-10-21 19:45:30,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:45:29" (2/3) ... [2021-10-21 19:45:30,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b7f4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:45:30, skipping insertion in model container [2021-10-21 19:45:30,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:45:30" (3/3) ... [2021-10-21 19:45:30,117 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2021-10-21 19:45:30,122 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-21 19:45:30,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:45:30,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:45:30,123 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-21 19:45:30,153 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,154 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,154 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,154 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,155 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,155 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,155 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,156 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,156 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,156 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,157 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,157 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,157 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,158 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,158 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,158 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,159 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,159 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,159 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,160 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,160 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,161 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,161 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,161 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,161 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,162 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,162 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,162 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,163 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,163 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,163 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,164 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,164 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,164 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,165 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,165 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,165 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,165 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,166 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,166 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,169 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,169 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,169 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,170 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,170 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,172 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,172 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,172 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,174 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,174 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,175 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:45:30,183 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-21 19:45:30,232 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:45:30,251 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 [2021-10-21 19:45:30,253 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-21 19:45:30,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 123 transitions, 270 flow [2021-10-21 19:45:30,371 INFO L129 PetriNetUnfolder]: 16/120 cut-off events. [2021-10-21 19:45:30,371 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-21 19:45:30,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 16/120 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2021-10-21 19:45:30,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 123 transitions, 270 flow [2021-10-21 19:45:30,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 110 transitions, 238 flow [2021-10-21 19:45:30,440 INFO L129 PetriNetUnfolder]: 16/109 cut-off events. [2021-10-21 19:45:30,440 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-21 19:45:30,441 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:30,442 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] [2021-10-21 19:45:30,442 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:30,452 INFO L82 PathProgramCache]: Analyzing trace with hash 659976034, now seen corresponding path program 1 times [2021-10-21 19:45:30,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:30,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569559945] [2021-10-21 19:45:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:30,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:45:30,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:30,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569559945] [2021-10-21 19:45:30,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569559945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:30,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:30,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:45:30,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846487175] [2021-10-21 19:45:30,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:45:30,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:30,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:45:30,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:45:30,774 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 123 [2021-10-21 19:45:30,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 238 flow. Second operand has 2 states, 2 states have (on average 119.0) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:30,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:30,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 123 [2021-10-21 19:45:30,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:30,815 INFO L129 PetriNetUnfolder]: 12/106 cut-off events. [2021-10-21 19:45:30,816 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-21 19:45:30,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 106 events. 12/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 121 event pairs, 0 based on Foata normal form. 4/97 useless extension candidates. Maximal degree in co-relation 115. Up to 4 conditions per place. [2021-10-21 19:45:30,821 INFO L132 encePairwiseOnDemand]: 119/123 looper letters, 0 selfloop transitions, 0 changer transitions 1/106 dead transitions. [2021-10-21 19:45:30,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 106 transitions, 230 flow [2021-10-21 19:45:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:45:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-21 19:45:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 240 transitions. [2021-10-21 19:45:30,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.975609756097561 [2021-10-21 19:45:30,844 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 240 transitions. [2021-10-21 19:45:30,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 240 transitions. [2021-10-21 19:45:30,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:30,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 240 transitions. [2021-10-21 19:45:30,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 120.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:30,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:30,866 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:30,869 INFO L186 Difference]: Start difference. First operand has 104 places, 110 transitions, 238 flow. Second operand 2 states and 240 transitions. [2021-10-21 19:45:30,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 106 transitions, 230 flow [2021-10-21 19:45:30,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 218 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-10-21 19:45:30,882 INFO L242 Difference]: Finished difference. Result has 99 places, 105 transitions, 216 flow [2021-10-21 19:45:30,884 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=216, PETRI_PLACES=99, PETRI_TRANSITIONS=105} [2021-10-21 19:45:30,885 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, -5 predicate places. [2021-10-21 19:45:30,886 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 105 transitions, 216 flow [2021-10-21 19:45:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 119.0) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:30,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:30,887 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] [2021-10-21 19:45:30,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:45:30,888 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:30,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:30,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1306502914, now seen corresponding path program 1 times [2021-10-21 19:45:30,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:30,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486625582] [2021-10-21 19:45:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:30,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:45:31,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:31,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486625582] [2021-10-21 19:45:31,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486625582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:31,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:31,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:45:31,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900151345] [2021-10-21 19:45:31,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:45:31,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:31,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:45:31,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:45:31,056 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 123 [2021-10-21 19:45:31,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 105 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:31,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 123 [2021-10-21 19:45:31,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:31,092 INFO L129 PetriNetUnfolder]: 15/118 cut-off events. [2021-10-21 19:45:31,092 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-21 19:45:31,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 118 events. 15/118 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 142 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 128. Up to 7 conditions per place. [2021-10-21 19:45:31,095 INFO L132 encePairwiseOnDemand]: 120/123 looper letters, 5 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2021-10-21 19:45:31,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 234 flow [2021-10-21 19:45:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:45:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-21 19:45:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2021-10-21 19:45:31,099 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.940379403794038 [2021-10-21 19:45:31,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2021-10-21 19:45:31,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2021-10-21 19:45:31,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:31,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2021-10-21 19:45:31,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,105 INFO L186 Difference]: Start difference. First operand has 99 places, 105 transitions, 216 flow. Second operand 3 states and 347 transitions. [2021-10-21 19:45:31,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 234 flow [2021-10-21 19:45:31,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 107 transitions, 234 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-21 19:45:31,109 INFO L242 Difference]: Finished difference. Result has 101 places, 106 transitions, 228 flow [2021-10-21 19:45:31,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2021-10-21 19:45:31,110 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2021-10-21 19:45:31,110 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 228 flow [2021-10-21 19:45:31,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:31,111 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:31,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:45:31,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:31,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1809721546, now seen corresponding path program 1 times [2021-10-21 19:45:31,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:31,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550227929] [2021-10-21 19:45:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:31,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:45:31,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:31,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550227929] [2021-10-21 19:45:31,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550227929] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:31,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:31,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:45:31,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063658292] [2021-10-21 19:45:31,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:45:31,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:45:31,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:45:31,265 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 123 [2021-10-21 19:45:31,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:31,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 123 [2021-10-21 19:45:31,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:31,317 INFO L129 PetriNetUnfolder]: 18/131 cut-off events. [2021-10-21 19:45:31,317 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-21 19:45:31,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 131 events. 18/131 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 191 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 146. Up to 7 conditions per place. [2021-10-21 19:45:31,320 INFO L132 encePairwiseOnDemand]: 120/123 looper letters, 5 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2021-10-21 19:45:31,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 108 transitions, 246 flow [2021-10-21 19:45:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:45:31,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-21 19:45:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2021-10-21 19:45:31,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.940379403794038 [2021-10-21 19:45:31,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2021-10-21 19:45:31,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2021-10-21 19:45:31,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:31,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2021-10-21 19:45:31,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,330 INFO L186 Difference]: Start difference. First operand has 101 places, 106 transitions, 228 flow. Second operand 3 states and 347 transitions. [2021-10-21 19:45:31,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 108 transitions, 246 flow [2021-10-21 19:45:31,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 108 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-21 19:45:31,335 INFO L242 Difference]: Finished difference. Result has 103 places, 107 transitions, 238 flow [2021-10-21 19:45:31,335 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=103, PETRI_TRANSITIONS=107} [2021-10-21 19:45:31,336 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, -1 predicate places. [2021-10-21 19:45:31,336 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 107 transitions, 238 flow [2021-10-21 19:45:31,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,337 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:31,337 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:31,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:45:31,337 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash 916316742, now seen corresponding path program 1 times [2021-10-21 19:45:31,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:31,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628879939] [2021-10-21 19:45:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:31,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:45:31,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:31,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628879939] [2021-10-21 19:45:31,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628879939] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:31,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:31,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:45:31,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310740565] [2021-10-21 19:45:31,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:45:31,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:45:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:45:31,418 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 123 [2021-10-21 19:45:31,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 107 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:31,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 123 [2021-10-21 19:45:31,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:31,452 INFO L129 PetriNetUnfolder]: 21/144 cut-off events. [2021-10-21 19:45:31,452 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-21 19:45:31,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 144 events. 21/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 250 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 163. Up to 7 conditions per place. [2021-10-21 19:45:31,456 INFO L132 encePairwiseOnDemand]: 120/123 looper letters, 5 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2021-10-21 19:45:31,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 109 transitions, 256 flow [2021-10-21 19:45:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:45:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-21 19:45:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2021-10-21 19:45:31,459 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.940379403794038 [2021-10-21 19:45:31,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2021-10-21 19:45:31,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2021-10-21 19:45:31,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:31,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2021-10-21 19:45:31,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,465 INFO L186 Difference]: Start difference. First operand has 103 places, 107 transitions, 238 flow. Second operand 3 states and 347 transitions. [2021-10-21 19:45:31,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 109 transitions, 256 flow [2021-10-21 19:45:31,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 109 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-21 19:45:31,469 INFO L242 Difference]: Finished difference. Result has 105 places, 108 transitions, 248 flow [2021-10-21 19:45:31,470 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2021-10-21 19:45:31,470 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2021-10-21 19:45:31,470 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 248 flow [2021-10-21 19:45:31,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,471 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:31,471 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:31,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:45:31,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:31,482 INFO L82 PathProgramCache]: Analyzing trace with hash 105933870, now seen corresponding path program 1 times [2021-10-21 19:45:31,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:31,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617119735] [2021-10-21 19:45:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:31,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:45:31,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:31,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617119735] [2021-10-21 19:45:31,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617119735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:31,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:31,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:45:31,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670286094] [2021-10-21 19:45:31,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:45:31,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:31,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:45:31,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:45:31,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 123 [2021-10-21 19:45:31,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:31,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 123 [2021-10-21 19:45:31,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:31,710 INFO L129 PetriNetUnfolder]: 17/161 cut-off events. [2021-10-21 19:45:31,710 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-21 19:45:31,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 161 events. 17/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 304 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 192. Up to 7 conditions per place. [2021-10-21 19:45:31,714 INFO L132 encePairwiseOnDemand]: 116/123 looper letters, 4 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2021-10-21 19:45:31,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 266 flow [2021-10-21 19:45:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:45:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-21 19:45:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 456 transitions. [2021-10-21 19:45:31,716 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2021-10-21 19:45:31,716 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 456 transitions. [2021-10-21 19:45:31,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 456 transitions. [2021-10-21 19:45:31,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:31,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 456 transitions. [2021-10-21 19:45:31,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,721 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,721 INFO L186 Difference]: Start difference. First operand has 105 places, 108 transitions, 248 flow. Second operand 4 states and 456 transitions. [2021-10-21 19:45:31,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 266 flow [2021-10-21 19:45:31,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 109 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-21 19:45:31,728 INFO L242 Difference]: Finished difference. Result has 109 places, 109 transitions, 271 flow [2021-10-21 19:45:31,729 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2021-10-21 19:45:31,729 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 5 predicate places. [2021-10-21 19:45:31,729 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 271 flow [2021-10-21 19:45:31,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,730 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:31,730 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:31,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:45:31,731 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:31,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:31,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1872708892, now seen corresponding path program 1 times [2021-10-21 19:45:31,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:31,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734701036] [2021-10-21 19:45:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:31,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:45:31,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:31,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734701036] [2021-10-21 19:45:31,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734701036] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:31,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:31,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:45:31,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373335255] [2021-10-21 19:45:31,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:45:31,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:45:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:45:31,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 123 [2021-10-21 19:45:31,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:31,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:31,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 123 [2021-10-21 19:45:31,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:32,001 INFO L129 PetriNetUnfolder]: 13/182 cut-off events. [2021-10-21 19:45:32,002 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-21 19:45:32,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 182 events. 13/182 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 389 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 232. Up to 8 conditions per place. [2021-10-21 19:45:32,005 INFO L132 encePairwiseOnDemand]: 116/123 looper letters, 4 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2021-10-21 19:45:32,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 110 transitions, 289 flow [2021-10-21 19:45:32,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:45:32,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-21 19:45:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 456 transitions. [2021-10-21 19:45:32,008 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2021-10-21 19:45:32,008 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 456 transitions. [2021-10-21 19:45:32,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 456 transitions. [2021-10-21 19:45:32,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:32,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 456 transitions. [2021-10-21 19:45:32,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:32,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:32,013 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:32,013 INFO L186 Difference]: Start difference. First operand has 109 places, 109 transitions, 271 flow. Second operand 4 states and 456 transitions. [2021-10-21 19:45:32,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 110 transitions, 289 flow [2021-10-21 19:45:32,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 110 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-21 19:45:32,017 INFO L242 Difference]: Finished difference. Result has 113 places, 110 transitions, 295 flow [2021-10-21 19:45:32,018 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=113, PETRI_TRANSITIONS=110} [2021-10-21 19:45:32,018 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 9 predicate places. [2021-10-21 19:45:32,018 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 110 transitions, 295 flow [2021-10-21 19:45:32,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:32,019 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:32,019 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:32,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:45:32,020 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1924206105, now seen corresponding path program 1 times [2021-10-21 19:45:32,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:32,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482619507] [2021-10-21 19:45:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:32,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:45:32,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:32,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482619507] [2021-10-21 19:45:32,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482619507] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:32,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:32,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:45:32,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205335533] [2021-10-21 19:45:32,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:45:32,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:45:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:45:32,153 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 123 [2021-10-21 19:45:32,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 110 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:32,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:32,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 123 [2021-10-21 19:45:32,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:32,249 INFO L129 PetriNetUnfolder]: 9/226 cut-off events. [2021-10-21 19:45:32,249 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-21 19:45:32,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 226 events. 9/226 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 666 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 296. Up to 8 conditions per place. [2021-10-21 19:45:32,253 INFO L132 encePairwiseOnDemand]: 116/123 looper letters, 4 selfloop transitions, 4 changer transitions 0/111 dead transitions. [2021-10-21 19:45:32,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 111 transitions, 313 flow [2021-10-21 19:45:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:45:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-21 19:45:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 456 transitions. [2021-10-21 19:45:32,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2021-10-21 19:45:32,259 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 456 transitions. [2021-10-21 19:45:32,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 456 transitions. [2021-10-21 19:45:32,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:32,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 456 transitions. [2021-10-21 19:45:32,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:32,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:32,263 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:32,264 INFO L186 Difference]: Start difference. First operand has 113 places, 110 transitions, 295 flow. Second operand 4 states and 456 transitions. [2021-10-21 19:45:32,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 111 transitions, 313 flow [2021-10-21 19:45:32,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 111 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-21 19:45:32,270 INFO L242 Difference]: Finished difference. Result has 117 places, 111 transitions, 319 flow [2021-10-21 19:45:32,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=117, PETRI_TRANSITIONS=111} [2021-10-21 19:45:32,270 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 13 predicate places. [2021-10-21 19:45:32,271 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 111 transitions, 319 flow [2021-10-21 19:45:32,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:32,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:32,271 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:32,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:45:32,272 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:32,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1408343260, now seen corresponding path program 1 times [2021-10-21 19:45:32,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:32,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708229780] [2021-10-21 19:45:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:32,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:45:32,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:32,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708229780] [2021-10-21 19:45:32,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708229780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:32,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160614792] [2021-10-21 19:45:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:32,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:32,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:32,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:32,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:45:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:32,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:45:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:45:33,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160614792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:33,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:33,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-10-21 19:45:33,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519756680] [2021-10-21 19:45:33,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:45:33,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:45:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:45:33,244 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 123 [2021-10-21 19:45:33,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 111 transitions, 319 flow. Second operand has 7 states, 7 states have (on average 107.57142857142857) internal successors, (753), 7 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:33,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:33,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 123 [2021-10-21 19:45:33,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:33,850 INFO L129 PetriNetUnfolder]: 403/2207 cut-off events. [2021-10-21 19:45:33,850 INFO L130 PetriNetUnfolder]: For 196/196 co-relation queries the response was YES. [2021-10-21 19:45:33,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 2207 events. 403/2207 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 18586 event pairs, 48 based on Foata normal form. 1/2086 useless extension candidates. Maximal degree in co-relation 3682. Up to 401 conditions per place. [2021-10-21 19:45:33,888 INFO L132 encePairwiseOnDemand]: 113/123 looper letters, 18 selfloop transitions, 12 changer transitions 3/133 dead transitions. [2021-10-21 19:45:33,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 133 transitions, 429 flow [2021-10-21 19:45:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:45:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-21 19:45:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 776 transitions. [2021-10-21 19:45:33,892 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9012775842044135 [2021-10-21 19:45:33,892 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 776 transitions. [2021-10-21 19:45:33,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 776 transitions. [2021-10-21 19:45:33,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:33,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 776 transitions. [2021-10-21 19:45:33,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.85714285714286) internal successors, (776), 7 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:33,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:33,900 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:33,900 INFO L186 Difference]: Start difference. First operand has 117 places, 111 transitions, 319 flow. Second operand 7 states and 776 transitions. [2021-10-21 19:45:33,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 133 transitions, 429 flow [2021-10-21 19:45:33,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 133 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-21 19:45:33,907 INFO L242 Difference]: Finished difference. Result has 127 places, 122 transitions, 400 flow [2021-10-21 19:45:33,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=400, PETRI_PLACES=127, PETRI_TRANSITIONS=122} [2021-10-21 19:45:33,908 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 23 predicate places. [2021-10-21 19:45:33,908 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 400 flow [2021-10-21 19:45:33,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.57142857142857) internal successors, (753), 7 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:33,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:33,909 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:33,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:34,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:34,125 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:34,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1346345762, now seen corresponding path program 2 times [2021-10-21 19:45:34,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:34,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775242007] [2021-10-21 19:45:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:34,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:45:34,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:34,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775242007] [2021-10-21 19:45:34,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775242007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:34,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961835385] [2021-10-21 19:45:34,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:45:34,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:34,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:34,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:45:34,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:45:34,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:34,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:45:34,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:45:34,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961835385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:34,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:34,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-10-21 19:45:34,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893233242] [2021-10-21 19:45:34,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:45:34,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:45:34,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:45:34,913 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 123 [2021-10-21 19:45:34,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 122 transitions, 400 flow. Second operand has 8 states, 8 states have (on average 107.375) internal successors, (859), 8 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) [2021-10-21 19:45:34,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:34,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 123 [2021-10-21 19:45:34,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:35,621 INFO L129 PetriNetUnfolder]: 509/2847 cut-off events. [2021-10-21 19:45:35,621 INFO L130 PetriNetUnfolder]: For 845/905 co-relation queries the response was YES. [2021-10-21 19:45:35,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 2847 events. 509/2847 cut-off events. For 845/905 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 26012 event pairs, 70 based on Foata normal form. 31/2714 useless extension candidates. Maximal degree in co-relation 5530. Up to 393 conditions per place. [2021-10-21 19:45:35,677 INFO L132 encePairwiseOnDemand]: 113/123 looper letters, 22 selfloop transitions, 26 changer transitions 3/151 dead transitions. [2021-10-21 19:45:35,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 151 transitions, 610 flow [2021-10-21 19:45:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:45:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-21 19:45:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 889 transitions. [2021-10-21 19:45:35,681 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9034552845528455 [2021-10-21 19:45:35,681 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 889 transitions. [2021-10-21 19:45:35,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 889 transitions. [2021-10-21 19:45:35,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:35,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 889 transitions. [2021-10-21 19:45:35,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.125) internal successors, (889), 8 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:35,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 123.0) internal successors, (1107), 9 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:35,688 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 123.0) internal successors, (1107), 9 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:35,688 INFO L186 Difference]: Start difference. First operand has 127 places, 122 transitions, 400 flow. Second operand 8 states and 889 transitions. [2021-10-21 19:45:35,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 151 transitions, 610 flow [2021-10-21 19:45:35,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 151 transitions, 592 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-10-21 19:45:35,697 INFO L242 Difference]: Finished difference. Result has 134 places, 136 transitions, 543 flow [2021-10-21 19:45:35,697 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=543, PETRI_PLACES=134, PETRI_TRANSITIONS=136} [2021-10-21 19:45:35,698 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 30 predicate places. [2021-10-21 19:45:35,701 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 136 transitions, 543 flow [2021-10-21 19:45:35,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.375) internal successors, (859), 8 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) [2021-10-21 19:45:35,702 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:35,702 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:35,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:35,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:35,929 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash -423232162, now seen corresponding path program 3 times [2021-10-21 19:45:35,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:35,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544779253] [2021-10-21 19:45:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:35,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:45:36,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:36,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544779253] [2021-10-21 19:45:36,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544779253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:36,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884225081] [2021-10-21 19:45:36,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:45:36,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:36,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:36,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:36,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:45:36,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:45:36,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:45:36,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:45:36,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884225081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:36,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:36,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-10-21 19:45:36,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914424563] [2021-10-21 19:45:36,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:45:36,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:36,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:45:36,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:45:36,785 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 123 [2021-10-21 19:45:36,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 136 transitions, 543 flow. Second operand has 8 states, 8 states have (on average 107.375) internal successors, (859), 8 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) [2021-10-21 19:45:36,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:36,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 123 [2021-10-21 19:45:36,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:37,639 INFO L129 PetriNetUnfolder]: 643/3458 cut-off events. [2021-10-21 19:45:37,639 INFO L130 PetriNetUnfolder]: For 2337/2560 co-relation queries the response was YES. [2021-10-21 19:45:37,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7611 conditions, 3458 events. 643/3458 cut-off events. For 2337/2560 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 32834 event pairs, 44 based on Foata normal form. 77/3318 useless extension candidates. Maximal degree in co-relation 7590. Up to 453 conditions per place. [2021-10-21 19:45:37,715 INFO L132 encePairwiseOnDemand]: 113/123 looper letters, 36 selfloop transitions, 28 changer transitions 3/167 dead transitions. [2021-10-21 19:45:37,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 167 transitions, 833 flow [2021-10-21 19:45:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:45:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-21 19:45:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 891 transitions. [2021-10-21 19:45:37,719 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9054878048780488 [2021-10-21 19:45:37,719 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 891 transitions. [2021-10-21 19:45:37,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 891 transitions. [2021-10-21 19:45:37,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:37,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 891 transitions. [2021-10-21 19:45:37,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.375) internal successors, (891), 8 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:37,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 123.0) internal successors, (1107), 9 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:37,728 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 123.0) internal successors, (1107), 9 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:37,728 INFO L186 Difference]: Start difference. First operand has 134 places, 136 transitions, 543 flow. Second operand 8 states and 891 transitions. [2021-10-21 19:45:37,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 167 transitions, 833 flow [2021-10-21 19:45:37,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 167 transitions, 748 flow, removed 39 selfloop flow, removed 3 redundant places. [2021-10-21 19:45:37,740 INFO L242 Difference]: Finished difference. Result has 139 places, 152 transitions, 663 flow [2021-10-21 19:45:37,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=663, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2021-10-21 19:45:37,741 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 35 predicate places. [2021-10-21 19:45:37,741 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 663 flow [2021-10-21 19:45:37,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.375) internal successors, (859), 8 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) [2021-10-21 19:45:37,742 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:37,742 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:37,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:37,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:45:37,956 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash 212931426, now seen corresponding path program 4 times [2021-10-21 19:45:37,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:37,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970583799] [2021-10-21 19:45:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:37,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:45:38,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:38,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970583799] [2021-10-21 19:45:38,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970583799] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:38,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333906050] [2021-10-21 19:45:38,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:45:38,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:38,157 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:38,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:45:38,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:45:38,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:45:38,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:45:38,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333906050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:38,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:38,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-21 19:45:38,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949012846] [2021-10-21 19:45:38,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:45:38,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:45:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:45:38,862 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 123 [2021-10-21 19:45:38,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 663 flow. Second operand has 9 states, 9 states have (on average 107.22222222222223) internal successors, (965), 9 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:38,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:38,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 123 [2021-10-21 19:45:38,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:39,948 INFO L129 PetriNetUnfolder]: 793/4290 cut-off events. [2021-10-21 19:45:39,948 INFO L130 PetriNetUnfolder]: For 3020/3515 co-relation queries the response was YES. [2021-10-21 19:45:40,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 4290 events. 793/4290 cut-off events. For 3020/3515 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 43135 event pairs, 68 based on Foata normal form. 197/4206 useless extension candidates. Maximal degree in co-relation 9489. Up to 571 conditions per place. [2021-10-21 19:45:40,108 INFO L132 encePairwiseOnDemand]: 113/123 looper letters, 26 selfloop transitions, 61 changer transitions 3/190 dead transitions. [2021-10-21 19:45:40,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 190 transitions, 1033 flow [2021-10-21 19:45:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:45:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 19:45:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1004 transitions. [2021-10-21 19:45:40,112 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9069557362240289 [2021-10-21 19:45:40,113 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1004 transitions. [2021-10-21 19:45:40,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1004 transitions. [2021-10-21 19:45:40,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:40,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1004 transitions. [2021-10-21 19:45:40,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.55555555555556) internal successors, (1004), 9 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:40,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 123.0) internal successors, (1230), 10 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:40,121 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 123.0) internal successors, (1230), 10 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:40,121 INFO L186 Difference]: Start difference. First operand has 139 places, 152 transitions, 663 flow. Second operand 9 states and 1004 transitions. [2021-10-21 19:45:40,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 190 transitions, 1033 flow [2021-10-21 19:45:40,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 190 transitions, 1001 flow, removed 16 selfloop flow, removed 2 redundant places. [2021-10-21 19:45:40,134 INFO L242 Difference]: Finished difference. Result has 146 places, 171 transitions, 928 flow [2021-10-21 19:45:40,135 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=928, PETRI_PLACES=146, PETRI_TRANSITIONS=171} [2021-10-21 19:45:40,135 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 42 predicate places. [2021-10-21 19:45:40,135 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 171 transitions, 928 flow [2021-10-21 19:45:40,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.22222222222223) internal successors, (965), 9 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:40,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:40,137 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:40,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:40,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:40,352 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:40,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1780446384, now seen corresponding path program 5 times [2021-10-21 19:45:40,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:40,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931071701] [2021-10-21 19:45:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:40,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:45:40,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:40,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931071701] [2021-10-21 19:45:40,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931071701] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:40,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73154898] [2021-10-21 19:45:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:45:40,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:40,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:40,554 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:40,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:45:40,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 19:45:40,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:40,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:45:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:45:41,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73154898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:41,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:41,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-21 19:45:41,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160893102] [2021-10-21 19:45:41,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:45:41,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:45:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:45:41,353 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 123 [2021-10-21 19:45:41,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 171 transitions, 928 flow. Second operand has 9 states, 9 states have (on average 107.22222222222223) internal successors, (965), 9 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:41,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:41,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 123 [2021-10-21 19:45:41,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:42,497 INFO L129 PetriNetUnfolder]: 952/5079 cut-off events. [2021-10-21 19:45:42,497 INFO L130 PetriNetUnfolder]: For 5932/6799 co-relation queries the response was YES. [2021-10-21 19:45:42,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12356 conditions, 5079 events. 952/5079 cut-off events. For 5932/6799 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 53131 event pairs, 44 based on Foata normal form. 157/4902 useless extension candidates. Maximal degree in co-relation 12332. Up to 667 conditions per place. [2021-10-21 19:45:42,597 INFO L132 encePairwiseOnDemand]: 113/123 looper letters, 59 selfloop transitions, 47 changer transitions 3/209 dead transitions. [2021-10-21 19:45:42,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 209 transitions, 1384 flow [2021-10-21 19:45:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:45:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 19:45:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1004 transitions. [2021-10-21 19:45:42,603 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9069557362240289 [2021-10-21 19:45:42,603 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1004 transitions. [2021-10-21 19:45:42,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1004 transitions. [2021-10-21 19:45:42,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:42,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1004 transitions. [2021-10-21 19:45:42,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.55555555555556) internal successors, (1004), 9 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:42,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 123.0) internal successors, (1230), 10 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:42,616 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 123.0) internal successors, (1230), 10 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:42,617 INFO L186 Difference]: Start difference. First operand has 146 places, 171 transitions, 928 flow. Second operand 9 states and 1004 transitions. [2021-10-21 19:45:42,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 209 transitions, 1384 flow [2021-10-21 19:45:42,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 209 transitions, 1196 flow, removed 81 selfloop flow, removed 4 redundant places. [2021-10-21 19:45:42,707 INFO L242 Difference]: Finished difference. Result has 151 places, 190 transitions, 1061 flow [2021-10-21 19:45:42,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1061, PETRI_PLACES=151, PETRI_TRANSITIONS=190} [2021-10-21 19:45:42,708 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 47 predicate places. [2021-10-21 19:45:42,708 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 190 transitions, 1061 flow [2021-10-21 19:45:42,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.22222222222223) internal successors, (965), 9 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:42,713 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:42,714 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:42,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-21 19:45:42,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:42,925 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash 911024464, now seen corresponding path program 6 times [2021-10-21 19:45:42,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:42,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782983138] [2021-10-21 19:45:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:42,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:45:43,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:43,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782983138] [2021-10-21 19:45:43,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782983138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:43,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090506396] [2021-10-21 19:45:43,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:45:43,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:43,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:43,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:43,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:45:43,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-21 19:45:43,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:43,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:45:43,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:45:43,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090506396] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:43,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:43,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-10-21 19:45:43,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044757276] [2021-10-21 19:45:43,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:45:43,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:45:43,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:45:43,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 123 [2021-10-21 19:45:43,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 190 transitions, 1061 flow. Second operand has 10 states, 10 states have (on average 107.1) internal successors, (1071), 10 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:43,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:43,925 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 123 [2021-10-21 19:45:43,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:45,102 INFO L129 PetriNetUnfolder]: 951/5073 cut-off events. [2021-10-21 19:45:45,102 INFO L130 PetriNetUnfolder]: For 5624/6431 co-relation queries the response was YES. [2021-10-21 19:45:45,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12200 conditions, 5073 events. 951/5073 cut-off events. For 5624/6431 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 53172 event pairs, 28 based on Foata normal form. 341/5105 useless extension candidates. Maximal degree in co-relation 12176. Up to 409 conditions per place. [2021-10-21 19:45:45,209 INFO L132 encePairwiseOnDemand]: 113/123 looper letters, 20 selfloop transitions, 102 changer transitions 3/225 dead transitions. [2021-10-21 19:45:45,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 225 transitions, 1483 flow [2021-10-21 19:45:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:45:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 19:45:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1107 transitions. [2021-10-21 19:45:45,213 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9 [2021-10-21 19:45:45,213 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1107 transitions. [2021-10-21 19:45:45,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1107 transitions. [2021-10-21 19:45:45,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:45,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1107 transitions. [2021-10-21 19:45:45,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.7) internal successors, (1107), 10 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:45,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 123.0) internal successors, (1353), 11 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:45,222 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 123.0) internal successors, (1353), 11 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:45,223 INFO L186 Difference]: Start difference. First operand has 151 places, 190 transitions, 1061 flow. Second operand 10 states and 1107 transitions. [2021-10-21 19:45:45,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 225 transitions, 1483 flow [2021-10-21 19:45:45,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 225 transitions, 1455 flow, removed 14 selfloop flow, removed 2 redundant places. [2021-10-21 19:45:45,242 INFO L242 Difference]: Finished difference. Result has 159 places, 206 transitions, 1394 flow [2021-10-21 19:45:45,242 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1394, PETRI_PLACES=159, PETRI_TRANSITIONS=206} [2021-10-21 19:45:45,242 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 55 predicate places. [2021-10-21 19:45:45,243 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 206 transitions, 1394 flow [2021-10-21 19:45:45,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.1) internal successors, (1071), 10 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:45,244 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:45,244 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:45,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:45,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:45:45,469 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash -197603789, now seen corresponding path program 7 times [2021-10-21 19:45:45,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:45,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046978014] [2021-10-21 19:45:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:45,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:45:45,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:45,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046978014] [2021-10-21 19:45:45,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046978014] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:45,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:45,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:45:45,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433791327] [2021-10-21 19:45:45,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:45:45,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:45,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:45:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:45:45,518 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 123 [2021-10-21 19:45:45,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 206 transitions, 1394 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:45,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:45,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 123 [2021-10-21 19:45:45,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:46,391 INFO L129 PetriNetUnfolder]: 955/4748 cut-off events. [2021-10-21 19:45:46,391 INFO L130 PetriNetUnfolder]: For 6446/6945 co-relation queries the response was YES. [2021-10-21 19:45:46,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12031 conditions, 4748 events. 955/4748 cut-off events. For 6446/6945 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 48271 event pairs, 28 based on Foata normal form. 94/4532 useless extension candidates. Maximal degree in co-relation 12005. Up to 387 conditions per place. [2021-10-21 19:45:46,488 INFO L132 encePairwiseOnDemand]: 119/123 looper letters, 3 selfloop transitions, 4 changer transitions 0/207 dead transitions. [2021-10-21 19:45:46,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 207 transitions, 1410 flow [2021-10-21 19:45:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:45:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-21 19:45:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2021-10-21 19:45:46,490 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9376693766937669 [2021-10-21 19:45:46,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2021-10-21 19:45:46,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2021-10-21 19:45:46,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:46,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2021-10-21 19:45:46,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:46,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:46,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:46,494 INFO L186 Difference]: Start difference. First operand has 159 places, 206 transitions, 1394 flow. Second operand 3 states and 346 transitions. [2021-10-21 19:45:46,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 207 transitions, 1410 flow [2021-10-21 19:45:46,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 207 transitions, 1345 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-10-21 19:45:46,519 INFO L242 Difference]: Finished difference. Result has 156 places, 207 transitions, 1351 flow [2021-10-21 19:45:46,519 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1351, PETRI_PLACES=156, PETRI_TRANSITIONS=207} [2021-10-21 19:45:46,520 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 52 predicate places. [2021-10-21 19:45:46,520 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 207 transitions, 1351 flow [2021-10-21 19:45:46,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:46,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:46,521 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:46,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:45:46,521 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2045798728, now seen corresponding path program 8 times [2021-10-21 19:45:46,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:46,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056750780] [2021-10-21 19:45:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:46,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 19:45:46,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:46,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056750780] [2021-10-21 19:45:46,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056750780] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:46,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:46,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:45:46,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285584559] [2021-10-21 19:45:46,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:45:46,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:46,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:45:46,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:45:46,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 123 [2021-10-21 19:45:46,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 207 transitions, 1351 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:46,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:46,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 123 [2021-10-21 19:45:46,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:47,320 INFO L129 PetriNetUnfolder]: 955/4655 cut-off events. [2021-10-21 19:45:47,320 INFO L130 PetriNetUnfolder]: For 5285/5688 co-relation queries the response was YES. [2021-10-21 19:45:47,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11910 conditions, 4655 events. 955/4655 cut-off events. For 5285/5688 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 47032 event pairs, 28 based on Foata normal form. 100/4448 useless extension candidates. Maximal degree in co-relation 11887. Up to 363 conditions per place. [2021-10-21 19:45:47,398 INFO L132 encePairwiseOnDemand]: 119/123 looper letters, 3 selfloop transitions, 4 changer transitions 0/208 dead transitions. [2021-10-21 19:45:47,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 208 transitions, 1367 flow [2021-10-21 19:45:47,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:45:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-21 19:45:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2021-10-21 19:45:47,400 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9376693766937669 [2021-10-21 19:45:47,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2021-10-21 19:45:47,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2021-10-21 19:45:47,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:47,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2021-10-21 19:45:47,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:47,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:47,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:47,404 INFO L186 Difference]: Start difference. First operand has 156 places, 207 transitions, 1351 flow. Second operand 3 states and 346 transitions. [2021-10-21 19:45:47,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 208 transitions, 1367 flow [2021-10-21 19:45:47,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 208 transitions, 1357 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-21 19:45:47,424 INFO L242 Difference]: Finished difference. Result has 158 places, 208 transitions, 1363 flow [2021-10-21 19:45:47,425 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1363, PETRI_PLACES=158, PETRI_TRANSITIONS=208} [2021-10-21 19:45:47,425 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 54 predicate places. [2021-10-21 19:45:47,425 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 208 transitions, 1363 flow [2021-10-21 19:45:47,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:47,426 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:45:47,426 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:47,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:45:47,426 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-21 19:45:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:47,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1048533369, now seen corresponding path program 9 times [2021-10-21 19:45:47,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:47,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354752254] [2021-10-21 19:45:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:47,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 19:45:47,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:47,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354752254] [2021-10-21 19:45:47,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354752254] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:47,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:45:47,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:45:47,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604239595] [2021-10-21 19:45:47,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:45:47,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:45:47,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:45:47,473 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 123 [2021-10-21 19:45:47,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 208 transitions, 1363 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:47,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:45:47,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 123 [2021-10-21 19:45:47,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:45:48,121 INFO L129 PetriNetUnfolder]: 955/4579 cut-off events. [2021-10-21 19:45:48,121 INFO L130 PetriNetUnfolder]: For 5478/5881 co-relation queries the response was YES. [2021-10-21 19:45:48,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12196 conditions, 4579 events. 955/4579 cut-off events. For 5478/5881 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 46102 event pairs, 28 based on Foata normal form. 122/4366 useless extension candidates. Maximal degree in co-relation 12172. Up to 363 conditions per place. [2021-10-21 19:45:48,195 INFO L132 encePairwiseOnDemand]: 119/123 looper letters, 0 selfloop transitions, 0 changer transitions 204/204 dead transitions. [2021-10-21 19:45:48,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 204 transitions, 1367 flow [2021-10-21 19:45:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:45:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-21 19:45:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2021-10-21 19:45:48,198 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9376693766937669 [2021-10-21 19:45:48,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2021-10-21 19:45:48,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2021-10-21 19:45:48,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:45:48,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2021-10-21 19:45:48,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:48,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:48,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:48,202 INFO L186 Difference]: Start difference. First operand has 158 places, 208 transitions, 1363 flow. Second operand 3 states and 346 transitions. [2021-10-21 19:45:48,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 204 transitions, 1367 flow [2021-10-21 19:45:48,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 204 transitions, 1320 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-10-21 19:45:48,224 INFO L242 Difference]: Finished difference. Result has 152 places, 0 transitions, 0 flow [2021-10-21 19:45:48,225 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=152, PETRI_TRANSITIONS=0} [2021-10-21 19:45:48,225 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 48 predicate places. [2021-10-21 19:45:48,225 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 0 transitions, 0 flow [2021-10-21 19:45:48,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:45:48,228 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:45:48,229 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-21 19:45:48,229 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-21 19:45:48,229 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-21 19:45:48,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:45:48,234 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-21 19:45:48,234 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:45:48,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:45:48 BasicIcfg [2021-10-21 19:45:48,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:45:48,239 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:45:48,239 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:45:48,239 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:45:48,240 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:45:30" (3/4) ... [2021-10-21 19:45:48,244 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:45:48,252 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-21 19:45:48,252 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-21 19:45:48,253 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-21 19:45:48,259 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-21 19:45:48,259 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:45:48,259 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:45:48,259 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:45:48,305 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:45:48,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:45:48,307 INFO L168 Benchmark]: Toolchain (without parser) took 19164.87 ms. Allocated memory was 111.1 MB in the beginning and 813.7 MB in the end (delta: 702.5 MB). Free memory was 68.6 MB in the beginning and 231.0 MB in the end (delta: -162.4 MB). Peak memory consumption was 540.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:48,308 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 111.1 MB. Free memory is still 84.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:48,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.17 ms. Allocated memory is still 111.1 MB. Free memory was 68.4 MB in the beginning and 83.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:48,310 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.36 ms. Allocated memory is still 111.1 MB. Free memory was 83.5 MB in the beginning and 82.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:48,310 INFO L168 Benchmark]: Boogie Preprocessor took 53.14 ms. Allocated memory is still 111.1 MB. Free memory was 82.0 MB in the beginning and 80.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:48,310 INFO L168 Benchmark]: RCFGBuilder took 522.08 ms. Allocated memory is still 111.1 MB. Free memory was 80.4 MB in the beginning and 66.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:48,311 INFO L168 Benchmark]: TraceAbstraction took 18127.72 ms. Allocated memory was 111.1 MB in the beginning and 813.7 MB in the end (delta: 702.5 MB). Free memory was 66.0 MB in the beginning and 233.1 MB in the end (delta: -167.1 MB). Peak memory consumption was 538.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:48,311 INFO L168 Benchmark]: Witness Printer took 66.76 ms. Allocated memory is still 813.7 MB. Free memory was 233.1 MB in the beginning and 231.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:48,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 111.1 MB. Free memory is still 84.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.17 ms. Allocated memory is still 111.1 MB. Free memory was 68.4 MB in the beginning and 83.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.36 ms. Allocated memory is still 111.1 MB. Free memory was 83.5 MB in the beginning and 82.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.14 ms. Allocated memory is still 111.1 MB. Free memory was 82.0 MB in the beginning and 80.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 522.08 ms. Allocated memory is still 111.1 MB. Free memory was 80.4 MB in the beginning and 66.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18127.72 ms. Allocated memory was 111.1 MB in the beginning and 813.7 MB in the end (delta: 702.5 MB). Free memory was 66.0 MB in the beginning and 233.1 MB in the end (delta: -167.1 MB). Peak memory consumption was 538.1 MB. Max. memory is 16.1 GB. * Witness Printer took 66.76 ms. Allocated memory is still 813.7 MB. Free memory was 233.1 MB in the beginning and 231.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 119]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 150 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 55.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18005.7ms, OverallIterations: 16, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 9620.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 132.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 113 SDtfs, 120 SDslu, 362 SDs, 0 SdLazy, 1114 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 521.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 734 GetRequests, 641 SyntacticMatches, 30 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 418.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1394occurred in iteration=13, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 164.7ms SsaConstructionTime, 987.9ms SatisfiabilityAnalysisTime, 4409.2ms InterpolantComputationTime, 2163 NumberOfCodeBlocks, 2128 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2141 ConstructedInterpolants, 0 QuantifiedInterpolants, 6231 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1331 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 22 InterpolantComputations, 10 PerfectInterpolantSequences, 129/327 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:45:48,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cceff40e-f97f-4063-9cc1-109bab93afe2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...