./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:04:35,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:04:35,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:04:36,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:04:36,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:04:36,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:04:36,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:04:36,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:04:36,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:04:36,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:04:36,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:04:36,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:04:36,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:04:36,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:04:36,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:04:36,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:04:36,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:04:36,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:04:36,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:04:36,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:04:36,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:04:36,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:04:36,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:04:36,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:04:36,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:04:36,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:04:36,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:04:36,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:04:36,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:04:36,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:04:36,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:04:36,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:04:36,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:04:36,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:04:36,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:04:36,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:04:36,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:04:36,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:04:36,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:04:36,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:04:36,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:04:36,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:04:36,098 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:04:36,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:04:36,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:04:36,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:04:36,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:04:36,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:04:36,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:04:36,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:04:36,102 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:04:36,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:04:36,102 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:04:36,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:04:36,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:04:36,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:04:36,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:04:36,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:04:36,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:04:36,104 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:04:36,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:04:36,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:04:36,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:04:36,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:04:36,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:04:36,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:04:36,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:04:36,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:04:36,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:04:36,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:04:36,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:04:36,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:04:36,107 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:04:36,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:04:36,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:04:36,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:04:36,108 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_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2021-11-20 06:04:36,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:04:36,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:04:36,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:04:36,461 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:04:36,462 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:04:36,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2021-11-20 06:04:36,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/data/07ac30fc1/2c9f8438cc3748ab98d80f4623a4ad10/FLAGc1180477f [2021-11-20 06:04:37,087 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:04:37,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/sv-benchmarks/c/weaver/mult-comm.wvr.c [2021-11-20 06:04:37,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/data/07ac30fc1/2c9f8438cc3748ab98d80f4623a4ad10/FLAGc1180477f [2021-11-20 06:04:37,453 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/data/07ac30fc1/2c9f8438cc3748ab98d80f4623a4ad10 [2021-11-20 06:04:37,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:04:37,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:04:37,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:04:37,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:04:37,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:04:37,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d8e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37, skipping insertion in model container [2021-11-20 06:04:37,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:04:37,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:04:37,695 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2021-11-20 06:04:37,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:04:37,707 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:04:37,727 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2021-11-20 06:04:37,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:04:37,742 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:04:37,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37 WrapperNode [2021-11-20 06:04:37,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:04:37,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:04:37,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:04:37,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:04:37,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,795 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2021-11-20 06:04:37,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:04:37,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:04:37,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:04:37,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:04:37,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:04:37,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:04:37,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:04:37,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:04:37,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (1/1) ... [2021-11-20 06:04:37,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:04:37,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:37,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:04:37,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:04:37,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:04:37,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 06:04:37,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 06:04:37,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 06:04:37,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 06:04:37,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:04:37,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:04:37,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:04:37,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:04:37,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:04:37,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:04:37,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:04:37,960 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 06:04:38,069 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:04:38,071 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:04:38,302 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:04:38,310 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:04:38,310 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 06:04:38,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:04:38 BoogieIcfgContainer [2021-11-20 06:04:38,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:04:38,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:04:38,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:04:38,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:04:38,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:04:37" (1/3) ... [2021-11-20 06:04:38,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4380d795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:04:38, skipping insertion in model container [2021-11-20 06:04:38,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:37" (2/3) ... [2021-11-20 06:04:38,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4380d795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:04:38, skipping insertion in model container [2021-11-20 06:04:38,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:04:38" (3/3) ... [2021-11-20 06:04:38,322 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2021-11-20 06:04:38,327 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 06:04:38,328 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:04:38,328 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:04:38,328 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 06:04:38,355 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,355 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,356 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,356 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,357 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,357 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,357 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,357 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,358 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,359 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,359 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,359 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,359 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,360 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,360 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,360 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,360 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,361 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,361 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,361 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,362 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,362 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,362 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,363 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,363 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,364 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,364 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,364 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,364 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,365 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,366 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,366 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,366 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,370 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,374 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:04:38,378 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 06:04:38,431 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:04:38,439 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:04:38,439 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 06:04:38,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2021-11-20 06:04:38,497 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2021-11-20 06:04:38,498 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:04:38,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2021-11-20 06:04:38,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2021-11-20 06:04:38,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2021-11-20 06:04:38,531 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-11-20 06:04:38,532 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:04:38,532 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:38,533 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] [2021-11-20 06:04:38,533 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1776550383, now seen corresponding path program 1 times [2021-11-20 06:04:38,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:38,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643063840] [2021-11-20 06:04:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:38,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:38,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:38,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643063840] [2021-11-20 06:04:38,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643063840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:38,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:38,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:04:38,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13525829] [2021-11-20 06:04:38,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:38,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:04:38,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:04:38,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:04:38,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2021-11-20 06:04:38,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:38,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:04:38,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2021-11-20 06:04:38,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:04:38,899 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2021-11-20 06:04:38,899 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-11-20 06:04:38,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2021-11-20 06:04:38,902 INFO L132 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2021-11-20 06:04:38,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2021-11-20 06:04:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:04:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:04:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2021-11-20 06:04:38,922 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.94375 [2021-11-20 06:04:38,922 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2021-11-20 06:04:38,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2021-11-20 06:04:38,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:04:38,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2021-11-20 06:04:38,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:38,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 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) [2021-11-20 06:04:38,935 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 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) [2021-11-20 06:04:38,937 INFO L186 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2021-11-20 06:04:38,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2021-11-20 06:04:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 06:04:38,945 INFO L242 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2021-11-20 06:04:38,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2021-11-20 06:04:38,951 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2021-11-20 06:04:38,951 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2021-11-20 06:04:38,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:38,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:38,952 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] [2021-11-20 06:04:38,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:04:38,953 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2021-11-20 06:04:38,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:38,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864091292] [2021-11-20 06:04:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:38,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:39,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:39,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864091292] [2021-11-20 06:04:39,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864091292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:39,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:39,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:04:39,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900276500] [2021-11-20 06:04:39,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:39,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:04:39,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:04:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:04:39,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2021-11-20 06:04:39,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:39,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:04:39,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2021-11-20 06:04:39,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:04:39,404 INFO L129 PetriNetUnfolder]: 12/126 cut-off events. [2021-11-20 06:04:39,404 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-11-20 06:04:39,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 126 events. 12/126 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 298 event pairs, 1 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 166. Up to 19 conditions per place. [2021-11-20 06:04:39,406 INFO L132 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2021-11-20 06:04:39,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2021-11-20 06:04:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:04:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 06:04:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2021-11-20 06:04:39,415 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2021-11-20 06:04:39,415 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2021-11-20 06:04:39,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2021-11-20 06:04:39,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:04:39,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2021-11-20 06:04:39,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:39,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:39,425 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:39,425 INFO L186 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2021-11-20 06:04:39,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2021-11-20 06:04:39,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:04:39,430 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2021-11-20 06:04:39,430 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2021-11-20 06:04:39,431 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2021-11-20 06:04:39,431 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2021-11-20 06:04:39,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:39,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:39,432 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:39,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:04:39,433 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1738455513, now seen corresponding path program 1 times [2021-11-20 06:04:39,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:39,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711560560] [2021-11-20 06:04:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:39,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:39,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:39,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711560560] [2021-11-20 06:04:39,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711560560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:39,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284425829] [2021-11-20 06:04:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:39,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:39,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:39,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:39,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:04:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:04:40,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:40,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:41,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284425829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:04:41,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:04:41,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 17 [2021-11-20 06:04:41,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258561550] [2021-11-20 06:04:41,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:04:41,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:04:41,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:04:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:04:41,320 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-11-20 06:04:41,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:41,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:04:41,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-11-20 06:04:41,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:04:41,964 INFO L129 PetriNetUnfolder]: 174/573 cut-off events. [2021-11-20 06:04:41,965 INFO L130 PetriNetUnfolder]: For 74/83 co-relation queries the response was YES. [2021-11-20 06:04:41,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 573 events. 174/573 cut-off events. For 74/83 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3194 event pairs, 15 based on Foata normal form. 4/499 useless extension candidates. Maximal degree in co-relation 1080. Up to 82 conditions per place. [2021-11-20 06:04:41,978 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 93 selfloop transitions, 31 changer transitions 19/184 dead transitions. [2021-11-20 06:04:41,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 184 transitions, 763 flow [2021-11-20 06:04:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:04:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-20 06:04:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1217 transitions. [2021-11-20 06:04:41,993 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7244047619047619 [2021-11-20 06:04:41,993 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1217 transitions. [2021-11-20 06:04:41,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1217 transitions. [2021-11-20 06:04:41,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:04:41,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1217 transitions. [2021-11-20 06:04:42,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.95238095238095) internal successors, (1217), 21 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:42,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:42,011 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:42,016 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 21 states and 1217 transitions. [2021-11-20 06:04:42,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 184 transitions, 763 flow [2021-11-20 06:04:42,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 184 transitions, 741 flow, removed 11 selfloop flow, removed 2 redundant places. [2021-11-20 06:04:42,028 INFO L242 Difference]: Finished difference. Result has 107 places, 92 transitions, 391 flow [2021-11-20 06:04:42,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=391, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2021-11-20 06:04:42,031 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2021-11-20 06:04:42,031 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 391 flow [2021-11-20 06:04:42,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:42,032 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:42,032 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:42,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:42,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:42,260 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:42,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1154719639, now seen corresponding path program 1 times [2021-11-20 06:04:42,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:42,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399677845] [2021-11-20 06:04:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:42,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:42,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:42,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399677845] [2021-11-20 06:04:42,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399677845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137851212] [2021-11-20 06:04:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:42,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:42,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:42,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:42,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:04:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:42,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:04:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:42,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:43,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137851212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:04:43,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:04:43,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2021-11-20 06:04:43,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244445262] [2021-11-20 06:04:43,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:04:43,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:04:43,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:43,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:04:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:04:43,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-11-20 06:04:43,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 391 flow. Second operand has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:43,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:04:43,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-11-20 06:04:43,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:04:44,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:45,262 INFO L129 PetriNetUnfolder]: 74/389 cut-off events. [2021-11-20 06:04:45,263 INFO L130 PetriNetUnfolder]: For 403/428 co-relation queries the response was YES. [2021-11-20 06:04:45,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 389 events. 74/389 cut-off events. For 403/428 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2086 event pairs, 5 based on Foata normal form. 17/382 useless extension candidates. Maximal degree in co-relation 914. Up to 142 conditions per place. [2021-11-20 06:04:45,269 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 39 selfloop transitions, 10 changer transitions 11/114 dead transitions. [2021-11-20 06:04:45,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 609 flow [2021-11-20 06:04:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:04:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-20 06:04:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2021-11-20 06:04:45,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76 [2021-11-20 06:04:45,274 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2021-11-20 06:04:45,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2021-11-20 06:04:45,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:04:45,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2021-11-20 06:04:45,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:45,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:45,282 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:45,282 INFO L186 Difference]: Start difference. First operand has 107 places, 92 transitions, 391 flow. Second operand 10 states and 608 transitions. [2021-11-20 06:04:45,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 609 flow [2021-11-20 06:04:45,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 114 transitions, 533 flow, removed 29 selfloop flow, removed 10 redundant places. [2021-11-20 06:04:45,301 INFO L242 Difference]: Finished difference. Result has 104 places, 92 transitions, 368 flow [2021-11-20 06:04:45,302 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2021-11-20 06:04:45,303 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2021-11-20 06:04:45,303 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 368 flow [2021-11-20 06:04:45,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:45,304 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:45,305 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:45,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:45,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:45,528 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash -837475069, now seen corresponding path program 2 times [2021-11-20 06:04:45,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:45,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643409034] [2021-11-20 06:04:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:45,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:45,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:45,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643409034] [2021-11-20 06:04:45,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643409034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:45,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278809240] [2021-11-20 06:04:45,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:04:45,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:45,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:45,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:45,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:04:45,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:04:45,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:04:45,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:04:45,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:46,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:46,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278809240] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:46,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:04:46,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 16 [2021-11-20 06:04:46,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870960294] [2021-11-20 06:04:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:46,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:04:46,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:46,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:04:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:04:46,720 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-11-20 06:04:46,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 368 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:46,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:04:46,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-11-20 06:04:46,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:04:47,084 INFO L129 PetriNetUnfolder]: 171/584 cut-off events. [2021-11-20 06:04:47,084 INFO L130 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2021-11-20 06:04:47,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 584 events. 171/584 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3358 event pairs, 62 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1454. Up to 222 conditions per place. [2021-11-20 06:04:47,092 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 68 selfloop transitions, 24 changer transitions 6/139 dead transitions. [2021-11-20 06:04:47,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 769 flow [2021-11-20 06:04:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:04:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-20 06:04:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 589 transitions. [2021-11-20 06:04:47,096 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.73625 [2021-11-20 06:04:47,098 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 589 transitions. [2021-11-20 06:04:47,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 589 transitions. [2021-11-20 06:04:47,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:04:47,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 589 transitions. [2021-11-20 06:04:47,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.9) internal successors, (589), 10 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:47,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:47,108 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:47,108 INFO L186 Difference]: Start difference. First operand has 104 places, 92 transitions, 368 flow. Second operand 10 states and 589 transitions. [2021-11-20 06:04:47,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 769 flow [2021-11-20 06:04:47,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 139 transitions, 721 flow, removed 15 selfloop flow, removed 7 redundant places. [2021-11-20 06:04:47,119 INFO L242 Difference]: Finished difference. Result has 107 places, 100 transitions, 495 flow [2021-11-20 06:04:47,120 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=495, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2021-11-20 06:04:47,123 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2021-11-20 06:04:47,123 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 495 flow [2021-11-20 06:04:47,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:47,124 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:47,124 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:47,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:47,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:47,340 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:47,341 INFO L85 PathProgramCache]: Analyzing trace with hash 852200369, now seen corresponding path program 3 times [2021-11-20 06:04:47,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:47,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132772817] [2021-11-20 06:04:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:47,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:47,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132772817] [2021-11-20 06:04:47,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132772817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:47,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271141272] [2021-11-20 06:04:47,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:04:47,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:47,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:47,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:47,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:04:47,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:04:47,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:04:47,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:04:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:47,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:04:48,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271141272] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:48,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:04:48,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 13 [2021-11-20 06:04:48,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439490017] [2021-11-20 06:04:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:48,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:04:48,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:48,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:04:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:04:48,340 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-11-20 06:04:48,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 495 flow. Second operand has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:48,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:04:48,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-11-20 06:04:48,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:04:50,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:50,261 INFO L129 PetriNetUnfolder]: 60/353 cut-off events. [2021-11-20 06:04:50,262 INFO L130 PetriNetUnfolder]: For 467/474 co-relation queries the response was YES. [2021-11-20 06:04:50,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 353 events. 60/353 cut-off events. For 467/474 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1913 event pairs, 17 based on Foata normal form. 2/345 useless extension candidates. Maximal degree in co-relation 828. Up to 110 conditions per place. [2021-11-20 06:04:50,266 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 52 selfloop transitions, 11 changer transitions 9/119 dead transitions. [2021-11-20 06:04:50,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 119 transitions, 734 flow [2021-11-20 06:04:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:04:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-20 06:04:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 549 transitions. [2021-11-20 06:04:50,269 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7625 [2021-11-20 06:04:50,269 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 549 transitions. [2021-11-20 06:04:50,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 549 transitions. [2021-11-20 06:04:50,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:04:50,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 549 transitions. [2021-11-20 06:04:50,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:50,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:50,275 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:50,275 INFO L186 Difference]: Start difference. First operand has 107 places, 100 transitions, 495 flow. Second operand 9 states and 549 transitions. [2021-11-20 06:04:50,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 119 transitions, 734 flow [2021-11-20 06:04:50,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 119 transitions, 696 flow, removed 11 selfloop flow, removed 5 redundant places. [2021-11-20 06:04:50,287 INFO L242 Difference]: Finished difference. Result has 112 places, 100 transitions, 498 flow [2021-11-20 06:04:50,287 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2021-11-20 06:04:50,290 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 41 predicate places. [2021-11-20 06:04:50,291 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 498 flow [2021-11-20 06:04:50,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:50,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:50,292 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:50,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:50,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:04:50,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash 215362169, now seen corresponding path program 2 times [2021-11-20 06:04:50,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:50,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880548013] [2021-11-20 06:04:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:50,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:50,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:50,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880548013] [2021-11-20 06:04:50,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880548013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:50,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789780796] [2021-11-20 06:04:50,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:04:50,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:50,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:50,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:50,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:04:50,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:04:50,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:04:50,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:04:50,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:51,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:52,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789780796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:04:52,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:04:52,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2021-11-20 06:04:52,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261658715] [2021-11-20 06:04:52,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:04:52,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:04:52,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:52,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:04:52,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:04:52,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-11-20 06:04:52,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 100 transitions, 498 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:52,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:04:52,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-11-20 06:04:52,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:04:53,268 INFO L129 PetriNetUnfolder]: 86/439 cut-off events. [2021-11-20 06:04:53,268 INFO L130 PetriNetUnfolder]: For 721/755 co-relation queries the response was YES. [2021-11-20 06:04:53,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 439 events. 86/439 cut-off events. For 721/755 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2388 event pairs, 4 based on Foata normal form. 21/450 useless extension candidates. Maximal degree in co-relation 1105. Up to 138 conditions per place. [2021-11-20 06:04:53,274 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 45 selfloop transitions, 41 changer transitions 12/154 dead transitions. [2021-11-20 06:04:53,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 154 transitions, 981 flow [2021-11-20 06:04:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:04:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-20 06:04:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2021-11-20 06:04:53,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7544117647058823 [2021-11-20 06:04:53,279 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2021-11-20 06:04:53,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2021-11-20 06:04:53,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:04:53,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2021-11-20 06:04:53,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:53,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:53,289 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:53,289 INFO L186 Difference]: Start difference. First operand has 112 places, 100 transitions, 498 flow. Second operand 17 states and 1026 transitions. [2021-11-20 06:04:53,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 154 transitions, 981 flow [2021-11-20 06:04:53,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 921 flow, removed 16 selfloop flow, removed 8 redundant places. [2021-11-20 06:04:53,299 INFO L242 Difference]: Finished difference. Result has 131 places, 121 transitions, 805 flow [2021-11-20 06:04:53,300 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=805, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2021-11-20 06:04:53,301 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 60 predicate places. [2021-11-20 06:04:53,301 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 805 flow [2021-11-20 06:04:53,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:53,305 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:53,305 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:53,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:53,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:53,531 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash -725373525, now seen corresponding path program 3 times [2021-11-20 06:04:53,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:53,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670239131] [2021-11-20 06:04:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:53,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:53,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:53,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670239131] [2021-11-20 06:04:53,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670239131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:53,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544896561] [2021-11-20 06:04:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:04:53,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:53,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:53,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:53,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:04:53,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:04:53,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:04:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:04:53,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:54,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544896561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:04:54,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:04:54,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2021-11-20 06:04:54,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515343024] [2021-11-20 06:04:54,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:04:54,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:04:54,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:54,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:04:54,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:04:54,655 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-11-20 06:04:54,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 805 flow. Second operand has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:54,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:04:54,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-11-20 06:04:54,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:04:55,175 INFO L129 PetriNetUnfolder]: 101/536 cut-off events. [2021-11-20 06:04:55,175 INFO L130 PetriNetUnfolder]: For 1335/1389 co-relation queries the response was YES. [2021-11-20 06:04:55,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 536 events. 101/536 cut-off events. For 1335/1389 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3189 event pairs, 14 based on Foata normal form. 25/552 useless extension candidates. Maximal degree in co-relation 1564. Up to 139 conditions per place. [2021-11-20 06:04:55,184 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 40 selfloop transitions, 61 changer transitions 9/166 dead transitions. [2021-11-20 06:04:55,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 166 transitions, 1359 flow [2021-11-20 06:04:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:04:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 06:04:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1077 transitions. [2021-11-20 06:04:55,190 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7479166666666667 [2021-11-20 06:04:55,190 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1077 transitions. [2021-11-20 06:04:55,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1077 transitions. [2021-11-20 06:04:55,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:04:55,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1077 transitions. [2021-11-20 06:04:55,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.833333333333336) internal successors, (1077), 18 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:55,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:55,203 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:55,203 INFO L186 Difference]: Start difference. First operand has 131 places, 121 transitions, 805 flow. Second operand 18 states and 1077 transitions. [2021-11-20 06:04:55,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 166 transitions, 1359 flow [2021-11-20 06:04:55,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1312 flow, removed 20 selfloop flow, removed 8 redundant places. [2021-11-20 06:04:55,229 INFO L242 Difference]: Finished difference. Result has 143 places, 143 transitions, 1157 flow [2021-11-20 06:04:55,230 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1157, PETRI_PLACES=143, PETRI_TRANSITIONS=143} [2021-11-20 06:04:55,231 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 72 predicate places. [2021-11-20 06:04:55,231 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 143 transitions, 1157 flow [2021-11-20 06:04:55,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:55,232 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:04:55,232 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:55,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:55,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:55,456 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:04:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash 332034331, now seen corresponding path program 1 times [2021-11-20 06:04:55,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:55,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821745219] [2021-11-20 06:04:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:55,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:56,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821745219] [2021-11-20 06:04:56,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821745219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947899895] [2021-11-20 06:04:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:56,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:56,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:56,720 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:56,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:04:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:04:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:58,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:03,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947899895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:03,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:14:03,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 39 [2021-11-20 06:14:03,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91900447] [2021-11-20 06:14:03,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:03,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:14:03,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:14:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:14:03,239 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2021-11-20 06:14:03,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 143 transitions, 1157 flow. Second operand has 39 states, 39 states have (on average 48.666666666666664) internal successors, (1898), 39 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:03,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:03,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2021-11-20 06:14:03,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:10,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:14:12,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 06:14:13,791 INFO L129 PetriNetUnfolder]: 431/1397 cut-off events. [2021-11-20 06:14:13,791 INFO L130 PetriNetUnfolder]: For 4330/4330 co-relation queries the response was YES. [2021-11-20 06:14:13,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4849 conditions, 1397 events. 431/1397 cut-off events. For 4330/4330 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10590 event pairs, 44 based on Foata normal form. 1/1394 useless extension candidates. Maximal degree in co-relation 4813. Up to 329 conditions per place. [2021-11-20 06:14:13,811 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 129 selfloop transitions, 198 changer transitions 24/388 dead transitions. [2021-11-20 06:14:13,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 388 transitions, 3572 flow [2021-11-20 06:14:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 06:14:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-11-20 06:14:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2632 transitions. [2021-11-20 06:14:13,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6450980392156863 [2021-11-20 06:14:13,819 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2632 transitions. [2021-11-20 06:14:13,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2632 transitions. [2021-11-20 06:14:13,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:13,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2632 transitions. [2021-11-20 06:14:13,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 51.6078431372549) internal successors, (2632), 51 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:13,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 80.0) internal successors, (4160), 52 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:13,839 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 80.0) internal successors, (4160), 52 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:13,840 INFO L186 Difference]: Start difference. First operand has 143 places, 143 transitions, 1157 flow. Second operand 51 states and 2632 transitions. [2021-11-20 06:14:13,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 388 transitions, 3572 flow [2021-11-20 06:14:13,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 388 transitions, 3245 flow, removed 47 selfloop flow, removed 10 redundant places. [2021-11-20 06:14:13,876 INFO L242 Difference]: Finished difference. Result has 199 places, 278 transitions, 2731 flow [2021-11-20 06:14:13,876 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2731, PETRI_PLACES=199, PETRI_TRANSITIONS=278} [2021-11-20 06:14:13,877 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 128 predicate places. [2021-11-20 06:14:13,877 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 278 transitions, 2731 flow [2021-11-20 06:14:13,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 48.666666666666664) internal successors, (1898), 39 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:13,879 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:13,879 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:13,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:14,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:14:14,092 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1425022785, now seen corresponding path program 2 times [2021-11-20 06:14:14,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:14,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974388514] [2021-11-20 06:14:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:14,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:14,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:14,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974388514] [2021-11-20 06:14:14,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974388514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:14,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165728120] [2021-11-20 06:14:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:14:14,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:14,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:14,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:14,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab57c8c-a0af-4330-a858-51b02b22d989/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:14:14,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:14:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:14:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:14:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:15,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:50,422 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 14 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)