./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:48:10,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:48:10,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:48:11,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:48:11,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:48:11,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:48:11,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:48:11,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:48:11,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:48:11,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:48:11,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:48:11,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:48:11,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:48:11,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:48:11,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:48:11,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:48:11,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:48:11,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:48:11,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:48:11,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:48:11,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:48:11,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:48:11,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:48:11,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:48:11,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:48:11,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:48:11,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:48:11,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:48:11,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:48:11,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:48:11,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:48:11,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:48:11,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:48:11,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:48:11,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:48:11,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:48:11,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:48:11,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:48:11,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:48:11,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:48:11,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:48:11,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:48:11,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:48:11,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:48:11,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:48:11,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:48:11,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:48:11,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:48:11,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:48:11,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:48:11,092 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:48:11,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:48:11,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:48:11,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:48:11,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:48:11,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:48:11,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:48:11,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:48:11,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:48:11,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:48:11,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:48:11,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:48:11,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:48:11,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:48:11,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:48:11,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:48:11,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:48:11,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:48:11,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:48:11,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:48:11,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:48:11,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:48:11,098 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:48:11,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:48:11,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:48:11,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:48:11,099 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_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2021-12-07 00:48:11,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:48:11,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:48:11,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:48:11,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:48:11,297 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:48:11,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-12-07 00:48:11,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/data/44535aea9/cbb17af006d743749914e6a1e892e4e1/FLAGb90d175e5 [2021-12-07 00:48:11,712 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:48:11,712 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-12-07 00:48:11,718 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/data/44535aea9/cbb17af006d743749914e6a1e892e4e1/FLAGb90d175e5 [2021-12-07 00:48:11,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/data/44535aea9/cbb17af006d743749914e6a1e892e4e1 [2021-12-07 00:48:11,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:48:11,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:48:11,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:48:11,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:48:11,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:48:11,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f82185e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11, skipping insertion in model container [2021-12-07 00:48:11,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:48:11,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:48:11,874 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_6b4f98fb-240d-45d2-b420-9a348a93c6e4/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2021-12-07 00:48:11,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:48:11,885 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:48:11,901 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_6b4f98fb-240d-45d2-b420-9a348a93c6e4/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2021-12-07 00:48:11,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:48:11,914 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:48:11,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11 WrapperNode [2021-12-07 00:48:11,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:48:11,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:48:11,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:48:11,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:48:11,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,945 INFO L137 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2021-12-07 00:48:11,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:48:11,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:48:11,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:48:11,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:48:11,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:48:11,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:48:11,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:48:11,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:48:11,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (1/1) ... [2021-12-07 00:48:11,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:48:11,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:11,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:48:11,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:48:12,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:48:12,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-07 00:48:12,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-07 00:48:12,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-07 00:48:12,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-07 00:48:12,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:48:12,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:48:12,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:48:12,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-07 00:48:12,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-07 00:48:12,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 00:48:12,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:48:12,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:48:12,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:48:12,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:48:12,039 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-07 00:48:12,112 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:48:12,114 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:48:12,287 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:48:12,333 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:48:12,333 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 00:48:12,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:48:12 BoogieIcfgContainer [2021-12-07 00:48:12,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:48:12,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:48:12,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:48:12,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:48:12,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:48:11" (1/3) ... [2021-12-07 00:48:12,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed67fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:48:12, skipping insertion in model container [2021-12-07 00:48:12,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:11" (2/3) ... [2021-12-07 00:48:12,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed67fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:48:12, skipping insertion in model container [2021-12-07 00:48:12,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:48:12" (3/3) ... [2021-12-07 00:48:12,341 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2021-12-07 00:48:12,345 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-07 00:48:12,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:48:12,345 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:48:12,345 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-07 00:48:12,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,371 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,372 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,373 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,374 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,375 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,376 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,377 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,380 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,381 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,381 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,381 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,381 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:48:12,384 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-07 00:48:12,420 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:48:12,426 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:48:12,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-07 00:48:12,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2021-12-07 00:48:12,485 INFO L129 PetriNetUnfolder]: 11/131 cut-off events. [2021-12-07 00:48:12,485 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-07 00:48:12,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2021-12-07 00:48:12,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2021-12-07 00:48:12,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2021-12-07 00:48:12,511 INFO L129 PetriNetUnfolder]: 11/121 cut-off events. [2021-12-07 00:48:12,511 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-07 00:48:12,512 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:12,512 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:12,512 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1382683983, now seen corresponding path program 1 times [2021-12-07 00:48:12,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:12,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313857417] [2021-12-07 00:48:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:12,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:12,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:12,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313857417] [2021-12-07 00:48:12,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313857417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:12,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:12,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:48:12,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615461990] [2021-12-07 00:48:12,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:12,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:48:12,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:48:12,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:48:12,697 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 133 [2021-12-07 00:48:12,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:12,699 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:12,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 133 [2021-12-07 00:48:12,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:12,734 INFO L129 PetriNetUnfolder]: 8/122 cut-off events. [2021-12-07 00:48:12,734 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-12-07 00:48:12,735 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 8/122 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 1 based on Foata normal form. 10/122 useless extension candidates. Maximal degree in co-relation 83. Up to 13 conditions per place. [2021-12-07 00:48:12,736 INFO L132 encePairwiseOnDemand]: 126/133 looper letters, 7 selfloop transitions, 0 changer transitions 3/115 dead transitions. [2021-12-07 00:48:12,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 256 flow [2021-12-07 00:48:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:48:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-07 00:48:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2021-12-07 00:48:12,746 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9398496240601504 [2021-12-07 00:48:12,747 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2021-12-07 00:48:12,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2021-12-07 00:48:12,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:12,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2021-12-07 00:48:12,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:12,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:12,757 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:12,758 INFO L186 Difference]: Start difference. First operand has 118 places, 122 transitions, 256 flow. Second operand 2 states and 250 transitions. [2021-12-07 00:48:12,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 256 flow [2021-12-07 00:48:12,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-07 00:48:12,765 INFO L242 Difference]: Finished difference. Result has 115 places, 112 transitions, 228 flow [2021-12-07 00:48:12,766 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=228, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2021-12-07 00:48:12,769 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2021-12-07 00:48:12,769 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 228 flow [2021-12-07 00:48:12,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:12,770 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:12,770 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:12,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:48:12,770 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:12,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash 882365775, now seen corresponding path program 1 times [2021-12-07 00:48:12,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:12,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469838463] [2021-12-07 00:48:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:12,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:12,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:12,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469838463] [2021-12-07 00:48:12,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469838463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:12,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:12,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:48:12,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704143791] [2021-12-07 00:48:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:12,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:48:12,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:12,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:48:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:48:12,904 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 133 [2021-12-07 00:48:12,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:12,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:12,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 133 [2021-12-07 00:48:12,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:12,989 INFO L129 PetriNetUnfolder]: 13/157 cut-off events. [2021-12-07 00:48:12,989 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2021-12-07 00:48:12,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 13/157 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 261 event pairs, 1 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 199. Up to 19 conditions per place. [2021-12-07 00:48:12,991 INFO L132 encePairwiseOnDemand]: 128/133 looper letters, 23 selfloop transitions, 2 changer transitions 4/121 dead transitions. [2021-12-07 00:48:12,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 307 flow [2021-12-07 00:48:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:48:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-07 00:48:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2021-12-07 00:48:12,994 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2021-12-07 00:48:12,994 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2021-12-07 00:48:12,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2021-12-07 00:48:12,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:12,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2021-12-07 00:48:12,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,001 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,001 INFO L186 Difference]: Start difference. First operand has 115 places, 112 transitions, 228 flow. Second operand 5 states and 540 transitions. [2021-12-07 00:48:13,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 307 flow [2021-12-07 00:48:13,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-07 00:48:13,005 INFO L242 Difference]: Finished difference. Result has 119 places, 113 transitions, 244 flow [2021-12-07 00:48:13,005 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2021-12-07 00:48:13,006 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2021-12-07 00:48:13,006 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 244 flow [2021-12-07 00:48:13,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,006 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:13,006 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:13,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:48:13,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1024793816, now seen corresponding path program 1 times [2021-12-07 00:48:13,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:13,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986955613] [2021-12-07 00:48:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:13,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:13,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986955613] [2021-12-07 00:48:13,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986955613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:13,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:13,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:48:13,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791576148] [2021-12-07 00:48:13,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:13,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:48:13,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:48:13,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:48:13,124 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2021-12-07 00:48:13,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:13,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2021-12-07 00:48:13,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:13,166 INFO L129 PetriNetUnfolder]: 18/188 cut-off events. [2021-12-07 00:48:13,166 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-12-07 00:48:13,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 188 events. 18/188 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 350 event pairs, 3 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 240. Up to 30 conditions per place. [2021-12-07 00:48:13,167 INFO L132 encePairwiseOnDemand]: 127/133 looper letters, 14 selfloop transitions, 5 changer transitions 2/118 dead transitions. [2021-12-07 00:48:13,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 298 flow [2021-12-07 00:48:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:48:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-07 00:48:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2021-12-07 00:48:13,169 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8796992481203008 [2021-12-07 00:48:13,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2021-12-07 00:48:13,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2021-12-07 00:48:13,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:13,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2021-12-07 00:48:13,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,173 INFO L186 Difference]: Start difference. First operand has 119 places, 113 transitions, 244 flow. Second operand 3 states and 351 transitions. [2021-12-07 00:48:13,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 298 flow [2021-12-07 00:48:13,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 292 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-07 00:48:13,176 INFO L242 Difference]: Finished difference. Result has 117 places, 115 transitions, 263 flow [2021-12-07 00:48:13,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2021-12-07 00:48:13,177 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2021-12-07 00:48:13,177 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 263 flow [2021-12-07 00:48:13,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:13,178 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:13,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:48:13,178 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:13,178 INFO L85 PathProgramCache]: Analyzing trace with hash 315089418, now seen corresponding path program 1 times [2021-12-07 00:48:13,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:13,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659176329] [2021-12-07 00:48:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:13,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:13,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:13,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659176329] [2021-12-07 00:48:13,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659176329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:13,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:13,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:48:13,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470748655] [2021-12-07 00:48:13,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:13,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:48:13,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:48:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:48:13,244 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2021-12-07 00:48:13,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:13,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2021-12-07 00:48:13,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:13,309 INFO L129 PetriNetUnfolder]: 29/229 cut-off events. [2021-12-07 00:48:13,309 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2021-12-07 00:48:13,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 229 events. 29/229 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 673 event pairs, 7 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 322. Up to 46 conditions per place. [2021-12-07 00:48:13,311 INFO L132 encePairwiseOnDemand]: 130/133 looper letters, 16 selfloop transitions, 2 changer transitions 1/120 dead transitions. [2021-12-07 00:48:13,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 120 transitions, 316 flow [2021-12-07 00:48:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:48:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-07 00:48:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2021-12-07 00:48:13,314 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2021-12-07 00:48:13,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2021-12-07 00:48:13,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2021-12-07 00:48:13,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:13,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2021-12-07 00:48:13,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,319 INFO L186 Difference]: Start difference. First operand has 117 places, 115 transitions, 263 flow. Second operand 3 states and 360 transitions. [2021-12-07 00:48:13,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 120 transitions, 316 flow [2021-12-07 00:48:13,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 120 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-07 00:48:13,324 INFO L242 Difference]: Finished difference. Result has 119 places, 115 transitions, 266 flow [2021-12-07 00:48:13,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2021-12-07 00:48:13,325 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2021-12-07 00:48:13,325 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 266 flow [2021-12-07 00:48:13,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:13,326 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:13,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:48:13,326 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash -93519548, now seen corresponding path program 1 times [2021-12-07 00:48:13,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:13,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449550929] [2021-12-07 00:48:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:13,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:13,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:13,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449550929] [2021-12-07 00:48:13,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449550929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:13,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:13,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:48:13,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181660425] [2021-12-07 00:48:13,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:13,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:48:13,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:13,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:48:13,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:48:13,436 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 133 [2021-12-07 00:48:13,437 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,437 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:13,437 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 133 [2021-12-07 00:48:13,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:13,556 INFO L129 PetriNetUnfolder]: 24/281 cut-off events. [2021-12-07 00:48:13,556 INFO L130 PetriNetUnfolder]: For 50/54 co-relation queries the response was YES. [2021-12-07 00:48:13,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 281 events. 24/281 cut-off events. For 50/54 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 878 event pairs, 12 based on Foata normal form. 3/266 useless extension candidates. Maximal degree in co-relation 398. Up to 45 conditions per place. [2021-12-07 00:48:13,558 INFO L132 encePairwiseOnDemand]: 125/133 looper letters, 22 selfloop transitions, 6 changer transitions 9/128 dead transitions. [2021-12-07 00:48:13,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 128 transitions, 376 flow [2021-12-07 00:48:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:48:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-07 00:48:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 756 transitions. [2021-12-07 00:48:13,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2021-12-07 00:48:13,562 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 756 transitions. [2021-12-07 00:48:13,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 756 transitions. [2021-12-07 00:48:13,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:13,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 756 transitions. [2021-12-07 00:48:13,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,570 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,570 INFO L186 Difference]: Start difference. First operand has 119 places, 115 transitions, 266 flow. Second operand 7 states and 756 transitions. [2021-12-07 00:48:13,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 128 transitions, 376 flow [2021-12-07 00:48:13,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 128 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-07 00:48:13,574 INFO L242 Difference]: Finished difference. Result has 126 places, 116 transitions, 286 flow [2021-12-07 00:48:13,575 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=126, PETRI_TRANSITIONS=116} [2021-12-07 00:48:13,575 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 8 predicate places. [2021-12-07 00:48:13,576 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 116 transitions, 286 flow [2021-12-07 00:48:13,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:13,576 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:13,576 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:13,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:48:13,577 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:13,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1414783415, now seen corresponding path program 1 times [2021-12-07 00:48:13,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:13,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944354169] [2021-12-07 00:48:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:13,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:48:13,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944354169] [2021-12-07 00:48:13,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944354169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:13,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331189368] [2021-12-07 00:48:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:13,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:13,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:13,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:13,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:48:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:13,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-07 00:48:13,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:14,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-07 00:48:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:14,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:14,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:48:14,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2021-12-07 00:48:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:15,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331189368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:15,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:48:15,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23, 17] total 38 [2021-12-07 00:48:15,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358306630] [2021-12-07 00:48:15,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:15,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:48:15,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:15,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:48:15,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 00:48:15,900 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2021-12-07 00:48:15,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 116 transitions, 286 flow. Second operand has 38 states, 38 states have (on average 72.42105263157895) internal successors, (2752), 38 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:15,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:15,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2021-12-07 00:48:15,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:16,868 INFO L129 PetriNetUnfolder]: 116/718 cut-off events. [2021-12-07 00:48:16,868 INFO L130 PetriNetUnfolder]: For 157/165 co-relation queries the response was YES. [2021-12-07 00:48:16,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1170 conditions, 718 events. 116/718 cut-off events. For 157/165 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3831 event pairs, 10 based on Foata normal form. 8/670 useless extension candidates. Maximal degree in co-relation 1161. Up to 70 conditions per place. [2021-12-07 00:48:16,872 INFO L132 encePairwiseOnDemand]: 103/133 looper letters, 62 selfloop transitions, 26 changer transitions 44/192 dead transitions. [2021-12-07 00:48:16,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 192 transitions, 760 flow [2021-12-07 00:48:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 00:48:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-07 00:48:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2481 transitions. [2021-12-07 00:48:16,879 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5486510393631137 [2021-12-07 00:48:16,879 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2481 transitions. [2021-12-07 00:48:16,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2481 transitions. [2021-12-07 00:48:16,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:16,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2481 transitions. [2021-12-07 00:48:16,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 72.97058823529412) internal successors, (2481), 34 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:16,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 133.0) internal successors, (4655), 35 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:16,895 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 133.0) internal successors, (4655), 35 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:16,895 INFO L186 Difference]: Start difference. First operand has 126 places, 116 transitions, 286 flow. Second operand 34 states and 2481 transitions. [2021-12-07 00:48:16,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 192 transitions, 760 flow [2021-12-07 00:48:16,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 192 transitions, 746 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-07 00:48:16,900 INFO L242 Difference]: Finished difference. Result has 168 places, 124 transitions, 402 flow [2021-12-07 00:48:16,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=402, PETRI_PLACES=168, PETRI_TRANSITIONS=124} [2021-12-07 00:48:16,901 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 50 predicate places. [2021-12-07 00:48:16,901 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 124 transitions, 402 flow [2021-12-07 00:48:16,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 72.42105263157895) internal successors, (2752), 38 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:16,902 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:16,902 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:16,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:48:17,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 00:48:17,103 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:17,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:17,103 INFO L85 PathProgramCache]: Analyzing trace with hash 688173817, now seen corresponding path program 2 times [2021-12-07 00:48:17,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:17,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045666364] [2021-12-07 00:48:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:17,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 00:48:17,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:17,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045666364] [2021-12-07 00:48:17,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045666364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:17,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:17,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:48:17,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214947114] [2021-12-07 00:48:17,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:17,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:48:17,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:48:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:48:17,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2021-12-07 00:48:17,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 124 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:17,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2021-12-07 00:48:17,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:17,266 INFO L129 PetriNetUnfolder]: 54/483 cut-off events. [2021-12-07 00:48:17,266 INFO L130 PetriNetUnfolder]: For 258/262 co-relation queries the response was YES. [2021-12-07 00:48:17,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 483 events. 54/483 cut-off events. For 258/262 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2015 event pairs, 9 based on Foata normal form. 4/451 useless extension candidates. Maximal degree in co-relation 810. Up to 60 conditions per place. [2021-12-07 00:48:17,271 INFO L132 encePairwiseOnDemand]: 129/133 looper letters, 22 selfloop transitions, 11 changer transitions 0/139 dead transitions. [2021-12-07 00:48:17,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 139 transitions, 546 flow [2021-12-07 00:48:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:48:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-07 00:48:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2021-12-07 00:48:17,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8947368421052632 [2021-12-07 00:48:17,273 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2021-12-07 00:48:17,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2021-12-07 00:48:17,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:17,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2021-12-07 00:48:17,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,277 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,277 INFO L186 Difference]: Start difference. First operand has 168 places, 124 transitions, 402 flow. Second operand 4 states and 476 transitions. [2021-12-07 00:48:17,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 139 transitions, 546 flow [2021-12-07 00:48:17,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 139 transitions, 479 flow, removed 16 selfloop flow, removed 24 redundant places. [2021-12-07 00:48:17,284 INFO L242 Difference]: Finished difference. Result has 138 places, 133 transitions, 456 flow [2021-12-07 00:48:17,284 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=456, PETRI_PLACES=138, PETRI_TRANSITIONS=133} [2021-12-07 00:48:17,285 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 20 predicate places. [2021-12-07 00:48:17,285 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 133 transitions, 456 flow [2021-12-07 00:48:17,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,286 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:17,286 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:17,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 00:48:17,286 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash 299093561, now seen corresponding path program 3 times [2021-12-07 00:48:17,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:17,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076318758] [2021-12-07 00:48:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:17,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 00:48:17,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:17,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076318758] [2021-12-07 00:48:17,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076318758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:17,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:17,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:48:17,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353949972] [2021-12-07 00:48:17,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:17,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:48:17,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:17,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:48:17,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:48:17,382 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2021-12-07 00:48:17,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 133 transitions, 456 flow. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:17,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2021-12-07 00:48:17,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:17,487 INFO L129 PetriNetUnfolder]: 86/798 cut-off events. [2021-12-07 00:48:17,487 INFO L130 PetriNetUnfolder]: For 532/536 co-relation queries the response was YES. [2021-12-07 00:48:17,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1349 conditions, 798 events. 86/798 cut-off events. For 532/536 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4675 event pairs, 18 based on Foata normal form. 27/757 useless extension candidates. Maximal degree in co-relation 1332. Up to 98 conditions per place. [2021-12-07 00:48:17,491 INFO L132 encePairwiseOnDemand]: 129/133 looper letters, 32 selfloop transitions, 4 changer transitions 1/143 dead transitions. [2021-12-07 00:48:17,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 143 transitions, 603 flow [2021-12-07 00:48:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:48:17,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-07 00:48:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2021-12-07 00:48:17,492 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8909774436090225 [2021-12-07 00:48:17,492 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2021-12-07 00:48:17,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2021-12-07 00:48:17,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:17,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2021-12-07 00:48:17,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,495 INFO L186 Difference]: Start difference. First operand has 138 places, 133 transitions, 456 flow. Second operand 4 states and 474 transitions. [2021-12-07 00:48:17,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 143 transitions, 603 flow [2021-12-07 00:48:17,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 143 transitions, 591 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-12-07 00:48:17,499 INFO L242 Difference]: Finished difference. Result has 143 places, 133 transitions, 459 flow [2021-12-07 00:48:17,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=459, PETRI_PLACES=143, PETRI_TRANSITIONS=133} [2021-12-07 00:48:17,500 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 25 predicate places. [2021-12-07 00:48:17,500 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 133 transitions, 459 flow [2021-12-07 00:48:17,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:17,500 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:17,501 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:17,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 00:48:17,501 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:17,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:17,501 INFO L85 PathProgramCache]: Analyzing trace with hash -669884963, now seen corresponding path program 1 times [2021-12-07 00:48:17,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:17,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322297964] [2021-12-07 00:48:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:17,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:48:17,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:17,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322297964] [2021-12-07 00:48:17,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322297964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:17,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697012167] [2021-12-07 00:48:17,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:17,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:17,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:17,668 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:17,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:48:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-07 00:48:17,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:48:18,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:48:18,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 14 [2021-12-07 00:48:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:18,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:18,925 INFO L354 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2021-12-07 00:48:18,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 62 [2021-12-07 00:48:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:19,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697012167] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:19,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:48:19,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 26, 20] total 46 [2021-12-07 00:48:19,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709713500] [2021-12-07 00:48:19,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:19,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:48:19,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:48:19,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1579, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:48:19,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2021-12-07 00:48:19,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 133 transitions, 459 flow. Second operand has 46 states, 46 states have (on average 72.21739130434783) internal successors, (3322), 46 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:19,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:19,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2021-12-07 00:48:19,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:22,401 INFO L129 PetriNetUnfolder]: 543/3912 cut-off events. [2021-12-07 00:48:22,401 INFO L130 PetriNetUnfolder]: For 3211/3292 co-relation queries the response was YES. [2021-12-07 00:48:22,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7270 conditions, 3912 events. 543/3912 cut-off events. For 3211/3292 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 37292 event pairs, 34 based on Foata normal form. 86/3626 useless extension candidates. Maximal degree in co-relation 7250. Up to 232 conditions per place. [2021-12-07 00:48:22,421 INFO L132 encePairwiseOnDemand]: 102/133 looper letters, 118 selfloop transitions, 87 changer transitions 96/362 dead transitions. [2021-12-07 00:48:22,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 362 transitions, 2035 flow [2021-12-07 00:48:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-07 00:48:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-12-07 00:48:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5114 transitions. [2021-12-07 00:48:22,433 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5493018259935554 [2021-12-07 00:48:22,433 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5114 transitions. [2021-12-07 00:48:22,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5114 transitions. [2021-12-07 00:48:22,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:22,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5114 transitions. [2021-12-07 00:48:22,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 73.05714285714286) internal successors, (5114), 70 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:22,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 133.0) internal successors, (9443), 71 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:22,460 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 133.0) internal successors, (9443), 71 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:22,460 INFO L186 Difference]: Start difference. First operand has 143 places, 133 transitions, 459 flow. Second operand 70 states and 5114 transitions. [2021-12-07 00:48:22,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 362 transitions, 2035 flow [2021-12-07 00:48:22,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 362 transitions, 2030 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-07 00:48:22,470 INFO L242 Difference]: Finished difference. Result has 257 places, 189 transitions, 1275 flow [2021-12-07 00:48:22,470 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=1275, PETRI_PLACES=257, PETRI_TRANSITIONS=189} [2021-12-07 00:48:22,471 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 139 predicate places. [2021-12-07 00:48:22,471 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 189 transitions, 1275 flow [2021-12-07 00:48:22,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 72.21739130434783) internal successors, (3322), 46 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:22,472 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:22,472 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:22,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:48:22,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:22,674 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:22,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1188313587, now seen corresponding path program 2 times [2021-12-07 00:48:22,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:22,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350207132] [2021-12-07 00:48:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:22,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:23,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:23,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350207132] [2021-12-07 00:48:23,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350207132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:23,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62738982] [2021-12-07 00:48:23,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:48:23,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:23,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:23,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:48:24,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:48:24,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-07 00:48:24,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 00:48:25,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:48:25,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:48:25,461 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-07 00:48:25,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2021-12-07 00:48:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:25,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:27,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:48:27,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 123 [2021-12-07 00:48:27,191 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-07 00:48:27,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 378 treesize of output 379 [2021-12-07 00:48:27,221 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-07 00:48:27,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 327 treesize of output 301 [2021-12-07 00:48:27,251 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-07 00:48:27,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 262 [2021-12-07 00:48:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:30,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62738982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:30,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:48:30,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 26] total 75 [2021-12-07 00:48:30,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028918889] [2021-12-07 00:48:30,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:30,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-07 00:48:30,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-07 00:48:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=4767, Unknown=62, NotChecked=0, Total=5550 [2021-12-07 00:48:30,502 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2021-12-07 00:48:30,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 189 transitions, 1275 flow. Second operand has 75 states, 75 states have (on average 57.45333333333333) internal successors, (4309), 75 states have internal predecessors, (4309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:30,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:30,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2021-12-07 00:48:30,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:53,801 INFO L129 PetriNetUnfolder]: 3767/14153 cut-off events. [2021-12-07 00:48:53,801 INFO L130 PetriNetUnfolder]: For 37748/37766 co-relation queries the response was YES. [2021-12-07 00:48:53,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33290 conditions, 14153 events. 3767/14153 cut-off events. For 37748/37766 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 164686 event pairs, 383 based on Foata normal form. 42/12792 useless extension candidates. Maximal degree in co-relation 33224. Up to 1431 conditions per place. [2021-12-07 00:48:53,923 INFO L132 encePairwiseOnDemand]: 94/133 looper letters, 371 selfloop transitions, 244 changer transitions 287/953 dead transitions. [2021-12-07 00:48:53,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 953 transitions, 7492 flow [2021-12-07 00:48:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-12-07 00:48:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-12-07 00:48:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 9101 transitions. [2021-12-07 00:48:53,932 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4561904761904762 [2021-12-07 00:48:53,932 INFO L72 ComplementDD]: Start complementDD. Operand 150 states and 9101 transitions. [2021-12-07 00:48:53,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 9101 transitions. [2021-12-07 00:48:53,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:53,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 150 states and 9101 transitions. [2021-12-07 00:48:53,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 151 states, 150 states have (on average 60.67333333333333) internal successors, (9101), 150 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:53,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 151 states, 151 states have (on average 133.0) internal successors, (20083), 151 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:53,970 INFO L81 ComplementDD]: Finished complementDD. Result has 151 states, 151 states have (on average 133.0) internal successors, (20083), 151 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:53,970 INFO L186 Difference]: Start difference. First operand has 257 places, 189 transitions, 1275 flow. Second operand 150 states and 9101 transitions. [2021-12-07 00:48:53,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 953 transitions, 7492 flow [2021-12-07 00:48:54,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 953 transitions, 6516 flow, removed 470 selfloop flow, removed 40 redundant places. [2021-12-07 00:48:54,067 INFO L242 Difference]: Finished difference. Result has 434 places, 358 transitions, 3412 flow [2021-12-07 00:48:54,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=150, PETRI_FLOW=3412, PETRI_PLACES=434, PETRI_TRANSITIONS=358} [2021-12-07 00:48:54,068 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 316 predicate places. [2021-12-07 00:48:54,068 INFO L470 AbstractCegarLoop]: Abstraction has has 434 places, 358 transitions, 3412 flow [2021-12-07 00:48:54,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 57.45333333333333) internal successors, (4309), 75 states have internal predecessors, (4309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:54,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:54,070 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:54,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:48:54,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:48:54,271 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:54,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:54,271 INFO L85 PathProgramCache]: Analyzing trace with hash 272938298, now seen corresponding path program 3 times [2021-12-07 00:48:54,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:54,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987252944] [2021-12-07 00:48:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:54,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 00:48:54,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:54,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987252944] [2021-12-07 00:48:54,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987252944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:54,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014861363] [2021-12-07 00:48:54,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:48:54,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:54,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:54,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:54,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:48:54,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-07 00:48:54,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 00:48:54,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 00:48:54,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 00:48:54,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014861363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:54,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:48:54,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 12] total 24 [2021-12-07 00:48:54,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692036110] [2021-12-07 00:48:54,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:54,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:48:54,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:54,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:48:54,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:48:54,892 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 133 [2021-12-07 00:48:54,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 358 transitions, 3412 flow. Second operand has 24 states, 24 states have (on average 101.33333333333333) internal successors, (2432), 24 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:54,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:48:54,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 133 [2021-12-07 00:48:54,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:48:56,271 INFO L129 PetriNetUnfolder]: 510/4228 cut-off events. [2021-12-07 00:48:56,271 INFO L130 PetriNetUnfolder]: For 75839/76078 co-relation queries the response was YES. [2021-12-07 00:48:56,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18599 conditions, 4228 events. 510/4228 cut-off events. For 75839/76078 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 43337 event pairs, 173 based on Foata normal form. 183/4081 useless extension candidates. Maximal degree in co-relation 18464. Up to 641 conditions per place. [2021-12-07 00:48:56,322 INFO L132 encePairwiseOnDemand]: 118/133 looper letters, 74 selfloop transitions, 62 changer transitions 93/321 dead transitions. [2021-12-07 00:48:56,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 321 transitions, 3585 flow [2021-12-07 00:48:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 00:48:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-07 00:48:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3059 transitions. [2021-12-07 00:48:56,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2021-12-07 00:48:56,326 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3059 transitions. [2021-12-07 00:48:56,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3059 transitions. [2021-12-07 00:48:56,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:48:56,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3059 transitions. [2021-12-07 00:48:56,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 101.96666666666667) internal successors, (3059), 30 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:56,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 133.0) internal successors, (4123), 31 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:56,333 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 133.0) internal successors, (4123), 31 states have internal predecessors, (4123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:56,333 INFO L186 Difference]: Start difference. First operand has 434 places, 358 transitions, 3412 flow. Second operand 30 states and 3059 transitions. [2021-12-07 00:48:56,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 321 transitions, 3585 flow [2021-12-07 00:48:56,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 321 transitions, 2848 flow, removed 258 selfloop flow, removed 105 redundant places. [2021-12-07 00:48:56,445 INFO L242 Difference]: Finished difference. Result has 280 places, 200 transitions, 1543 flow [2021-12-07 00:48:56,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1543, PETRI_PLACES=280, PETRI_TRANSITIONS=200} [2021-12-07 00:48:56,446 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 162 predicate places. [2021-12-07 00:48:56,446 INFO L470 AbstractCegarLoop]: Abstraction has has 280 places, 200 transitions, 1543 flow [2021-12-07 00:48:56,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 101.33333333333333) internal successors, (2432), 24 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:48:56,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:48:56,447 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:56,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:48:56,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 00:48:56,648 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:48:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:56,648 INFO L85 PathProgramCache]: Analyzing trace with hash -373869824, now seen corresponding path program 4 times [2021-12-07 00:48:56,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:56,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747460789] [2021-12-07 00:48:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:56,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:57,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:57,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747460789] [2021-12-07 00:48:57,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747460789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:48:57,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673242024] [2021-12-07 00:48:57,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:48:57,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:57,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:57,340 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:57,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:48:57,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:48:57,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 00:48:57,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:58,556 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-07 00:48:58,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2021-12-07 00:48:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:58,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:59,054 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-07 00:48:59,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 76 [2021-12-07 00:49:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:49:00,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673242024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:00,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:49:00,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 25] total 69 [2021-12-07 00:49:00,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527492751] [2021-12-07 00:49:00,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:00,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-07 00:49:00,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:00,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-07 00:49:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=3928, Unknown=0, NotChecked=0, Total=4692 [2021-12-07 00:49:00,305 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2021-12-07 00:49:00,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 200 transitions, 1543 flow. Second operand has 69 states, 69 states have (on average 67.92753623188406) internal successors, (4687), 69 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:00,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:49:00,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2021-12-07 00:49:00,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:49:14,182 INFO L129 PetriNetUnfolder]: 4306/16295 cut-off events. [2021-12-07 00:49:14,182 INFO L130 PetriNetUnfolder]: For 116458/116465 co-relation queries the response was YES. [2021-12-07 00:49:14,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59098 conditions, 16295 events. 4306/16295 cut-off events. For 116458/116465 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 190565 event pairs, 418 based on Foata normal form. 58/15488 useless extension candidates. Maximal degree in co-relation 59026. Up to 2567 conditions per place. [2021-12-07 00:49:14,319 INFO L132 encePairwiseOnDemand]: 98/133 looper letters, 453 selfloop transitions, 325 changer transitions 292/1127 dead transitions. [2021-12-07 00:49:14,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1127 transitions, 12628 flow [2021-12-07 00:49:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-12-07 00:49:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-12-07 00:49:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 12068 transitions. [2021-12-07 00:49:14,329 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5306248076331179 [2021-12-07 00:49:14,329 INFO L72 ComplementDD]: Start complementDD. Operand 171 states and 12068 transitions. [2021-12-07 00:49:14,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 171 states and 12068 transitions. [2021-12-07 00:49:14,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:49:14,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 171 states and 12068 transitions. [2021-12-07 00:49:14,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 172 states, 171 states have (on average 70.57309941520468) internal successors, (12068), 171 states have internal predecessors, (12068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:14,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 172 states, 172 states have (on average 133.0) internal successors, (22876), 172 states have internal predecessors, (22876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:14,365 INFO L81 ComplementDD]: Finished complementDD. Result has 172 states, 172 states have (on average 133.0) internal successors, (22876), 172 states have internal predecessors, (22876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:14,365 INFO L186 Difference]: Start difference. First operand has 280 places, 200 transitions, 1543 flow. Second operand 171 states and 12068 transitions. [2021-12-07 00:49:14,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1127 transitions, 12628 flow [2021-12-07 00:49:14,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1127 transitions, 9530 flow, removed 1519 selfloop flow, removed 42 redundant places. [2021-12-07 00:49:14,590 INFO L242 Difference]: Finished difference. Result has 501 places, 448 transitions, 5361 flow [2021-12-07 00:49:14,590 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=171, PETRI_FLOW=5361, PETRI_PLACES=501, PETRI_TRANSITIONS=448} [2021-12-07 00:49:14,591 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 383 predicate places. [2021-12-07 00:49:14,591 INFO L470 AbstractCegarLoop]: Abstraction has has 501 places, 448 transitions, 5361 flow [2021-12-07 00:49:14,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 67.92753623188406) internal successors, (4687), 69 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:14,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:49:14,592 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:14,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:49:14,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:14,794 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:49:14,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:14,795 INFO L85 PathProgramCache]: Analyzing trace with hash -669361431, now seen corresponding path program 5 times [2021-12-07 00:49:14,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:14,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575296544] [2021-12-07 00:49:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:14,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:49:15,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:15,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575296544] [2021-12-07 00:49:15,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575296544] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:49:15,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255704086] [2021-12-07 00:49:15,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:49:15,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:15,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:15,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:15,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:49:15,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-07 00:49:15,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:15,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-07 00:49:15,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:16,550 INFO L354 Elim1Store]: treesize reduction 251, result has 3.8 percent of original size [2021-12-07 00:49:16,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 27 [2021-12-07 00:49:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 56 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 00:49:16,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:16,999 INFO L354 Elim1Store]: treesize reduction 140, result has 46.4 percent of original size [2021-12-07 00:49:17,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 150 [2021-12-07 00:49:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:49:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255704086] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:17,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:49:17,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15, 12] total 47 [2021-12-07 00:49:17,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544305970] [2021-12-07 00:49:17,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:17,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-07 00:49:17,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:17,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-07 00:49:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1867, Unknown=0, NotChecked=0, Total=2162 [2021-12-07 00:49:17,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2021-12-07 00:49:17,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 448 transitions, 5361 flow. Second operand has 47 states, 47 states have (on average 69.02127659574468) internal successors, (3244), 47 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:17,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:49:17,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2021-12-07 00:49:17,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:49:27,281 INFO L129 PetriNetUnfolder]: 5642/20723 cut-off events. [2021-12-07 00:49:27,281 INFO L130 PetriNetUnfolder]: For 489451/489561 co-relation queries the response was YES. [2021-12-07 00:49:27,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109460 conditions, 20723 events. 5642/20723 cut-off events. For 489451/489561 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 246886 event pairs, 1434 based on Foata normal form. 109/19730 useless extension candidates. Maximal degree in co-relation 109291. Up to 5137 conditions per place. [2021-12-07 00:49:27,756 INFO L132 encePairwiseOnDemand]: 106/133 looper letters, 466 selfloop transitions, 209 changer transitions 131/863 dead transitions. [2021-12-07 00:49:27,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 863 transitions, 14651 flow [2021-12-07 00:49:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-07 00:49:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-12-07 00:49:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 5992 transitions. [2021-12-07 00:49:27,761 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.530030959752322 [2021-12-07 00:49:27,762 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 5992 transitions. [2021-12-07 00:49:27,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 5992 transitions. [2021-12-07 00:49:27,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:49:27,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 5992 transitions. [2021-12-07 00:49:27,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 70.49411764705883) internal successors, (5992), 85 states have internal predecessors, (5992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:27,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 133.0) internal successors, (11438), 86 states have internal predecessors, (11438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:27,778 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 133.0) internal successors, (11438), 86 states have internal predecessors, (11438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:27,778 INFO L186 Difference]: Start difference. First operand has 501 places, 448 transitions, 5361 flow. Second operand 85 states and 5992 transitions. [2021-12-07 00:49:27,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 863 transitions, 14651 flow [2021-12-07 00:49:29,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 863 transitions, 12679 flow, removed 867 selfloop flow, removed 78 redundant places. [2021-12-07 00:49:29,247 INFO L242 Difference]: Finished difference. Result has 510 places, 521 transitions, 6322 flow [2021-12-07 00:49:29,247 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=4376, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=6322, PETRI_PLACES=510, PETRI_TRANSITIONS=521} [2021-12-07 00:49:29,248 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 392 predicate places. [2021-12-07 00:49:29,248 INFO L470 AbstractCegarLoop]: Abstraction has has 510 places, 521 transitions, 6322 flow [2021-12-07 00:49:29,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 69.02127659574468) internal successors, (3244), 47 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:29,248 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:49:29,248 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:29,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:49:29,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 00:49:29,449 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:49:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1681188703, now seen corresponding path program 6 times [2021-12-07 00:49:29,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:29,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496878197] [2021-12-07 00:49:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:29,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:49:30,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:30,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496878197] [2021-12-07 00:49:30,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496878197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:49:30,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552762162] [2021-12-07 00:49:30,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:49:30,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:30,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:30,062 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:30,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:49:30,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-07 00:49:30,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:30,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 00:49:30,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:30,753 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-12-07 00:49:30,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2021-12-07 00:49:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:49:30,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:31,158 INFO L354 Elim1Store]: treesize reduction 140, result has 46.4 percent of original size [2021-12-07 00:49:31,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 150 [2021-12-07 00:49:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:49:31,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552762162] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:31,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:49:31,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15, 15] total 49 [2021-12-07 00:49:31,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514032083] [2021-12-07 00:49:31,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:31,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 00:49:31,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:31,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 00:49:31,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2009, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 00:49:31,751 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2021-12-07 00:49:31,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 521 transitions, 6322 flow. Second operand has 49 states, 49 states have (on average 68.77551020408163) internal successors, (3370), 49 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:31,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:49:31,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2021-12-07 00:49:31,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:49:44,301 INFO L129 PetriNetUnfolder]: 6924/25864 cut-off events. [2021-12-07 00:49:44,301 INFO L130 PetriNetUnfolder]: For 652482/652606 co-relation queries the response was YES. [2021-12-07 00:49:44,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141083 conditions, 25864 events. 6924/25864 cut-off events. For 652482/652606 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 318817 event pairs, 1966 based on Foata normal form. 143/24576 useless extension candidates. Maximal degree in co-relation 140913. Up to 5660 conditions per place. [2021-12-07 00:49:44,966 INFO L132 encePairwiseOnDemand]: 108/133 looper letters, 440 selfloop transitions, 235 changer transitions 186/918 dead transitions. [2021-12-07 00:49:44,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 918 transitions, 14283 flow [2021-12-07 00:49:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-07 00:49:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-12-07 00:49:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5725 transitions. [2021-12-07 00:49:44,970 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5314211454562332 [2021-12-07 00:49:44,970 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5725 transitions. [2021-12-07 00:49:44,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5725 transitions. [2021-12-07 00:49:44,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:49:44,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5725 transitions. [2021-12-07 00:49:44,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 70.67901234567901) internal successors, (5725), 81 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:44,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 133.0) internal successors, (10906), 82 states have internal predecessors, (10906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:44,983 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 133.0) internal successors, (10906), 82 states have internal predecessors, (10906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:44,983 INFO L186 Difference]: Start difference. First operand has 510 places, 521 transitions, 6322 flow. Second operand 81 states and 5725 transitions. [2021-12-07 00:49:44,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 918 transitions, 14283 flow [2021-12-07 00:49:47,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 918 transitions, 13481 flow, removed 331 selfloop flow, removed 60 redundant places. [2021-12-07 00:49:47,087 INFO L242 Difference]: Finished difference. Result has 532 places, 555 transitions, 7364 flow [2021-12-07 00:49:47,088 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=5734, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=7364, PETRI_PLACES=532, PETRI_TRANSITIONS=555} [2021-12-07 00:49:47,088 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 414 predicate places. [2021-12-07 00:49:47,088 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 555 transitions, 7364 flow [2021-12-07 00:49:47,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 68.77551020408163) internal successors, (3370), 49 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:47,088 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:49:47,089 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:47,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:49:47,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 00:49:47,290 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:49:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1647430715, now seen corresponding path program 7 times [2021-12-07 00:49:47,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:47,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807009206] [2021-12-07 00:49:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:47,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:49:48,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:48,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807009206] [2021-12-07 00:49:48,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807009206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:49:48,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402014407] [2021-12-07 00:49:48,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:49:48,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:48,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:48,662 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:48,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:49:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:49:48,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-07 00:49:48,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:50,005 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-12-07 00:49:50,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2021-12-07 00:49:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:49:50,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:50,840 INFO L354 Elim1Store]: treesize reduction 154, result has 41.0 percent of original size [2021-12-07 00:49:50,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 136 [2021-12-07 00:49:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:49:52,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402014407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:52,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:49:52,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26, 25] total 78 [2021-12-07 00:49:52,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311672421] [2021-12-07 00:49:52,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:52,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-07 00:49:52,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-07 00:49:52,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=5231, Unknown=0, NotChecked=0, Total=6006 [2021-12-07 00:49:52,503 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 133 [2021-12-07 00:49:52,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 555 transitions, 7364 flow. Second operand has 78 states, 78 states have (on average 56.02564102564103) internal successors, (4370), 78 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:49:52,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:49:52,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 133 [2021-12-07 00:49:52,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:50:34,725 INFO L129 PetriNetUnfolder]: 12238/43957 cut-off events. [2021-12-07 00:50:34,725 INFO L130 PetriNetUnfolder]: For 2077389/2077527 co-relation queries the response was YES. [2021-12-07 00:50:35,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296695 conditions, 43957 events. 12238/43957 cut-off events. For 2077389/2077527 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 582350 event pairs, 1450 based on Foata normal form. 627/42433 useless extension candidates. Maximal degree in co-relation 296522. Up to 10164 conditions per place. [2021-12-07 00:50:35,932 INFO L132 encePairwiseOnDemand]: 97/133 looper letters, 609 selfloop transitions, 651 changer transitions 541/1850 dead transitions. [2021-12-07 00:50:35,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 1850 transitions, 37789 flow [2021-12-07 00:50:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2021-12-07 00:50:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2021-12-07 00:50:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 13267 transitions. [2021-12-07 00:50:35,946 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4375082442949479 [2021-12-07 00:50:35,946 INFO L72 ComplementDD]: Start complementDD. Operand 228 states and 13267 transitions. [2021-12-07 00:50:35,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 228 states and 13267 transitions. [2021-12-07 00:50:35,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:50:35,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 228 states and 13267 transitions. [2021-12-07 00:50:35,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 229 states, 228 states have (on average 58.18859649122807) internal successors, (13267), 228 states have internal predecessors, (13267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:35,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 229 states, 229 states have (on average 133.0) internal successors, (30457), 229 states have internal predecessors, (30457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:35,989 INFO L81 ComplementDD]: Finished complementDD. Result has 229 states, 229 states have (on average 133.0) internal successors, (30457), 229 states have internal predecessors, (30457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:35,990 INFO L186 Difference]: Start difference. First operand has 532 places, 555 transitions, 7364 flow. Second operand 228 states and 13267 transitions. [2021-12-07 00:50:35,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 1850 transitions, 37789 flow [2021-12-07 00:50:41,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1850 transitions, 32594 flow, removed 2495 selfloop flow, removed 69 redundant places. [2021-12-07 00:50:41,321 INFO L242 Difference]: Finished difference. Result has 813 places, 850 transitions, 14895 flow [2021-12-07 00:50:41,322 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=6147, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=228, PETRI_FLOW=14895, PETRI_PLACES=813, PETRI_TRANSITIONS=850} [2021-12-07 00:50:41,322 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 695 predicate places. [2021-12-07 00:50:41,322 INFO L470 AbstractCegarLoop]: Abstraction has has 813 places, 850 transitions, 14895 flow [2021-12-07 00:50:41,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 56.02564102564103) internal successors, (4370), 78 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:41,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:50:41,323 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:41,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:50:41,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:50:41,524 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:50:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:41,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2144507977, now seen corresponding path program 8 times [2021-12-07 00:50:41,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:50:41,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624446739] [2021-12-07 00:50:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:41,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:50:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:43,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624446739] [2021-12-07 00:50:43,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624446739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:50:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380641780] [2021-12-07 00:50:43,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:50:43,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:43,050 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:50:43,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:50:43,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:50:43,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:50:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-07 00:50:43,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:43,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:50:43,167 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 00:50:43,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 00:50:43,567 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-07 00:50:43,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 00:50:44,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 00:50:44,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:50:44,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:50:45,225 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-12-07 00:50:45,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2021-12-07 00:50:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:45,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:48,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:50:48,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 270 treesize of output 174 [2021-12-07 00:50:48,139 INFO L354 Elim1Store]: treesize reduction 140, result has 46.4 percent of original size [2021-12-07 00:50:48,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 522 treesize of output 564 [2021-12-07 00:50:48,220 INFO L354 Elim1Store]: treesize reduction 140, result has 46.4 percent of original size [2021-12-07 00:50:48,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 444 treesize of output 444 [2021-12-07 00:50:48,299 INFO L354 Elim1Store]: treesize reduction 140, result has 46.4 percent of original size [2021-12-07 00:50:48,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 384 [2021-12-07 00:51:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:51:12,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380641780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:51:12,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:51:12,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 36] total 102 [2021-12-07 00:51:12,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507796306] [2021-12-07 00:51:12,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:12,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-07 00:51:12,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:51:12,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-07 00:51:12,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1246, Invalid=8986, Unknown=70, NotChecked=0, Total=10302 [2021-12-07 00:51:12,437 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2021-12-07 00:51:12,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 813 places, 850 transitions, 14895 flow. Second operand has 102 states, 102 states have (on average 57.13725490196079) internal successors, (5828), 102 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:12,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:51:12,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2021-12-07 00:51:12,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:51:50,165 INFO L129 PetriNetUnfolder]: 13792/52176 cut-off events. [2021-12-07 00:51:50,165 INFO L130 PetriNetUnfolder]: For 4149093/4149307 co-relation queries the response was YES. [2021-12-07 00:51:53,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394184 conditions, 52176 events. 13792/52176 cut-off events. For 4149093/4149307 co-relation queries the response was YES. Maximal size of possible extension queue 1188. Compared 712197 event pairs, 5086 based on Foata normal form. 184/49091 useless extension candidates. Maximal degree in co-relation 393871. Up to 16922 conditions per place. [2021-12-07 00:51:53,219 INFO L132 encePairwiseOnDemand]: 98/133 looper letters, 835 selfloop transitions, 308 changer transitions 133/1327 dead transitions. [2021-12-07 00:51:53,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 1327 transitions, 28641 flow [2021-12-07 00:51:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-07 00:51:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-12-07 00:51:53,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5022 transitions. [2021-12-07 00:51:53,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4549325120028988 [2021-12-07 00:51:53,223 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5022 transitions. [2021-12-07 00:51:53,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5022 transitions. [2021-12-07 00:51:53,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:51:53,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5022 transitions. [2021-12-07 00:51:53,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 60.506024096385545) internal successors, (5022), 83 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:53,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 133.0) internal successors, (11172), 84 states have internal predecessors, (11172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:53,234 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 133.0) internal successors, (11172), 84 states have internal predecessors, (11172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:53,234 INFO L186 Difference]: Start difference. First operand has 813 places, 850 transitions, 14895 flow. Second operand 83 states and 5022 transitions. [2021-12-07 00:51:53,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 1327 transitions, 28641 flow [2021-12-07 00:52:07,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1327 transitions, 23611 flow, removed 2444 selfloop flow, removed 158 redundant places. [2021-12-07 00:52:08,014 INFO L242 Difference]: Finished difference. Result has 644 places, 934 transitions, 15267 flow [2021-12-07 00:52:08,014 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=12368, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=15267, PETRI_PLACES=644, PETRI_TRANSITIONS=934} [2021-12-07 00:52:08,015 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 526 predicate places. [2021-12-07 00:52:08,015 INFO L470 AbstractCegarLoop]: Abstraction has has 644 places, 934 transitions, 15267 flow [2021-12-07 00:52:08,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 57.13725490196079) internal successors, (5828), 102 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:52:08,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:52:08,016 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:52:08,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:52:08,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:52:08,217 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:52:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:52:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1679723994, now seen corresponding path program 9 times [2021-12-07 00:52:08,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:52:08,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204246597] [2021-12-07 00:52:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:52:08,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:52:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:52:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-07 00:52:08,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:52:08,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204246597] [2021-12-07 00:52:08,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204246597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:52:08,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953810853] [2021-12-07 00:52:08,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:52:08,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:52:08,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:52:08,288 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:52:08,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:52:08,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-07 00:52:08,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:52:08,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:52:08,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:52:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-07 00:52:08,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:52:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:52:08,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953810853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:52:08,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:52:08,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 9] total 14 [2021-12-07 00:52:08,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533728446] [2021-12-07 00:52:08,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:52:08,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:52:08,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:52:08,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:52:08,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:52:08,993 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2021-12-07 00:52:08,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 934 transitions, 15267 flow. Second operand has 14 states, 14 states have (on average 112.64285714285714) internal successors, (1577), 14 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:52:08,994 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:52:08,994 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2021-12-07 00:52:08,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:52:21,342 INFO L129 PetriNetUnfolder]: 5008/29934 cut-off events. [2021-12-07 00:52:21,342 INFO L130 PetriNetUnfolder]: For 2581589/2586255 co-relation queries the response was YES. [2021-12-07 00:52:22,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 233473 conditions, 29934 events. 5008/29934 cut-off events. For 2581589/2586255 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 430371 event pairs, 2066 based on Foata normal form. 340/27529 useless extension candidates. Maximal degree in co-relation 233254. Up to 7182 conditions per place. [2021-12-07 00:52:22,114 INFO L132 encePairwiseOnDemand]: 127/133 looper letters, 538 selfloop transitions, 491 changer transitions 0/1195 dead transitions. [2021-12-07 00:52:22,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 1195 transitions, 22291 flow [2021-12-07 00:52:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:52:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-07 00:52:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 809 transitions. [2021-12-07 00:52:22,116 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8689581095596133 [2021-12-07 00:52:22,116 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 809 transitions. [2021-12-07 00:52:22,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 809 transitions. [2021-12-07 00:52:22,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:52:22,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 809 transitions. [2021-12-07 00:52:22,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:52:22,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:52:22,118 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:52:22,118 INFO L186 Difference]: Start difference. First operand has 644 places, 934 transitions, 15267 flow. Second operand 7 states and 809 transitions. [2021-12-07 00:52:22,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 1195 transitions, 22291 flow [2021-12-07 00:52:29,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 1195 transitions, 21313 flow, removed 376 selfloop flow, removed 62 redundant places. [2021-12-07 00:52:29,761 INFO L242 Difference]: Finished difference. Result has 586 places, 1174 transitions, 21210 flow [2021-12-07 00:52:29,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=14395, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21210, PETRI_PLACES=586, PETRI_TRANSITIONS=1174} [2021-12-07 00:52:29,762 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 468 predicate places. [2021-12-07 00:52:29,762 INFO L470 AbstractCegarLoop]: Abstraction has has 586 places, 1174 transitions, 21210 flow [2021-12-07 00:52:29,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 112.64285714285714) internal successors, (1577), 14 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:52:29,763 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:52:29,763 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:52:29,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-07 00:52:29,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:52:29,964 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:52:29,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:52:29,965 INFO L85 PathProgramCache]: Analyzing trace with hash -140396010, now seen corresponding path program 10 times [2021-12-07 00:52:29,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:52:29,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595345669] [2021-12-07 00:52:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:52:29,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:52:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:52:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:52:30,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:52:30,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595345669] [2021-12-07 00:52:30,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595345669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:52:30,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910838197] [2021-12-07 00:52:30,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:52:30,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:52:30,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:52:30,682 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:52:30,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:52:30,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:52:30,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:52:30,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-07 00:52:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:52:31,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 00:52:31,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 00:52:31,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 00:52:31,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:52:32,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:52:32,579 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-12-07 00:52:32,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2021-12-07 00:52:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:52:32,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:52:36,552 INFO L354 Elim1Store]: treesize reduction 132, result has 22.8 percent of original size [2021-12-07 00:52:36,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 414 treesize of output 200 [2021-12-07 00:52:36,624 INFO L354 Elim1Store]: treesize reduction 154, result has 41.0 percent of original size [2021-12-07 00:52:36,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1092 treesize of output 1042 [2021-12-07 00:52:36,701 INFO L354 Elim1Store]: treesize reduction 154, result has 41.0 percent of original size [2021-12-07 00:52:36,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 936 treesize of output 922 [2021-12-07 00:52:36,777 INFO L354 Elim1Store]: treesize reduction 154, result has 41.0 percent of original size [2021-12-07 00:52:36,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 816 treesize of output 682 [2021-12-07 00:53:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:02,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910838197] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:53:02,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:53:02,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 37, 35] total 94 [2021-12-07 00:53:02,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415781514] [2021-12-07 00:53:02,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:53:02,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-07 00:53:02,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:02,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-07 00:53:02,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1667, Invalid=6984, Unknown=91, NotChecked=0, Total=8742 [2021-12-07 00:53:02,643 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2021-12-07 00:53:02,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 1174 transitions, 21210 flow. Second operand has 94 states, 94 states have (on average 60.4468085106383) internal successors, (5682), 94 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:02,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:53:02,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2021-12-07 00:53:02,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:54:53,982 INFO L129 PetriNetUnfolder]: 26813/99719 cut-off events. [2021-12-07 00:54:53,983 INFO L130 PetriNetUnfolder]: For 6881443/6881737 co-relation queries the response was YES. [2021-12-07 00:54:57,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 727527 conditions, 99719 events. 26813/99719 cut-off events. For 6881443/6881737 co-relation queries the response was YES. Maximal size of possible extension queue 2246. Compared 1487359 event pairs, 8653 based on Foata normal form. 463/94115 useless extension candidates. Maximal degree in co-relation 727309. Up to 31743 conditions per place. [2021-12-07 00:54:57,702 INFO L132 encePairwiseOnDemand]: 94/133 looper letters, 1589 selfloop transitions, 949 changer transitions 338/2930 dead transitions. [2021-12-07 00:54:57,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 2930 transitions, 68180 flow [2021-12-07 00:54:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-12-07 00:54:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2021-12-07 00:54:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 15759 transitions. [2021-12-07 00:54:57,712 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47395488721804513 [2021-12-07 00:54:57,712 INFO L72 ComplementDD]: Start complementDD. Operand 250 states and 15759 transitions. [2021-12-07 00:54:57,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 250 states and 15759 transitions. [2021-12-07 00:54:57,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:54:57,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 250 states and 15759 transitions. [2021-12-07 00:54:57,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 251 states, 250 states have (on average 63.036) internal successors, (15759), 250 states have internal predecessors, (15759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:57,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 251 states, 251 states have (on average 133.0) internal successors, (33383), 251 states have internal predecessors, (33383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:57,826 INFO L81 ComplementDD]: Finished complementDD. Result has 251 states, 251 states have (on average 133.0) internal successors, (33383), 251 states have internal predecessors, (33383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:57,826 INFO L186 Difference]: Start difference. First operand has 586 places, 1174 transitions, 21210 flow. Second operand 250 states and 15759 transitions. [2021-12-07 00:54:57,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 2930 transitions, 68180 flow [2021-12-07 00:55:31,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 2930 transitions, 66674 flow, removed 752 selfloop flow, removed 1 redundant places. [2021-12-07 00:55:31,731 INFO L242 Difference]: Finished difference. Result has 1009 places, 2005 transitions, 46590 flow [2021-12-07 00:55:31,732 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=20794, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=250, PETRI_FLOW=46590, PETRI_PLACES=1009, PETRI_TRANSITIONS=2005} [2021-12-07 00:55:31,733 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 891 predicate places. [2021-12-07 00:55:31,733 INFO L470 AbstractCegarLoop]: Abstraction has has 1009 places, 2005 transitions, 46590 flow [2021-12-07 00:55:31,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 60.4468085106383) internal successors, (5682), 94 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:31,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:55:31,734 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:31,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:55:31,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:55:31,934 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:55:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:31,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1963762400, now seen corresponding path program 11 times [2021-12-07 00:55:31,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:31,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214602587] [2021-12-07 00:55:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:31,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 57 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:55:32,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:32,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214602587] [2021-12-07 00:55:32,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214602587] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:55:32,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792841314] [2021-12-07 00:55:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:55:32,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:55:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:55:32,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:55:32,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:55:32,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-07 00:55:32,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:55:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:55:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:55:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 70 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:55:33,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:55:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 57 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:55:34,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792841314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:55:34,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:55:34,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 18] total 52 [2021-12-07 00:55:34,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064815262] [2021-12-07 00:55:34,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:55:34,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-07 00:55:34,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-07 00:55:34,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2199, Unknown=0, NotChecked=0, Total=2652 [2021-12-07 00:55:34,399 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 133 [2021-12-07 00:55:34,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1009 places, 2005 transitions, 46590 flow. Second operand has 52 states, 52 states have (on average 96.8076923076923) internal successors, (5034), 52 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:34,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:55:34,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 133 [2021-12-07 00:55:34,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:56:06,786 INFO L129 PetriNetUnfolder]: 8481/37171 cut-off events. [2021-12-07 00:56:06,786 INFO L130 PetriNetUnfolder]: For 7654542/7660453 co-relation queries the response was YES. [2021-12-07 00:56:08,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405814 conditions, 37171 events. 8481/37171 cut-off events. For 7654542/7660453 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 508634 event pairs, 5172 based on Foata normal form. 102/33030 useless extension candidates. Maximal degree in co-relation 405420. Up to 15723 conditions per place. [2021-12-07 00:56:08,713 INFO L132 encePairwiseOnDemand]: 115/133 looper letters, 1098 selfloop transitions, 31 changer transitions 179/1416 dead transitions. [2021-12-07 00:56:08,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 912 places, 1416 transitions, 38918 flow [2021-12-07 00:56:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-07 00:56:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-12-07 00:56:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 5736 transitions. [2021-12-07 00:56:08,716 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7309799923537658 [2021-12-07 00:56:08,717 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 5736 transitions. [2021-12-07 00:56:08,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 5736 transitions. [2021-12-07 00:56:08,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:56:08,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 5736 transitions. [2021-12-07 00:56:08,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 97.22033898305085) internal successors, (5736), 59 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:08,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 133.0) internal successors, (7980), 60 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:08,761 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 133.0) internal successors, (7980), 60 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:08,761 INFO L186 Difference]: Start difference. First operand has 1009 places, 2005 transitions, 46590 flow. Second operand 59 states and 5736 transitions. [2021-12-07 00:56:08,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 912 places, 1416 transitions, 38918 flow [2021-12-07 00:56:30,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 1416 transitions, 27558 flow, removed 5139 selfloop flow, removed 193 redundant places. [2021-12-07 00:56:30,483 INFO L242 Difference]: Finished difference. Result has 740 places, 1232 transitions, 21326 flow [2021-12-07 00:56:30,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=22631, PETRI_DIFFERENCE_MINUEND_PLACES=661, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=21326, PETRI_PLACES=740, PETRI_TRANSITIONS=1232} [2021-12-07 00:56:30,485 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 622 predicate places. [2021-12-07 00:56:30,485 INFO L470 AbstractCegarLoop]: Abstraction has has 740 places, 1232 transitions, 21326 flow [2021-12-07 00:56:30,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 96.8076923076923) internal successors, (5034), 52 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:30,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:56:30,485 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:30,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:56:30,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:30,687 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:56:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1037982043, now seen corresponding path program 12 times [2021-12-07 00:56:30,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:30,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831989704] [2021-12-07 00:56:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:30,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 10 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:32,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831989704] [2021-12-07 00:56:32,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831989704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564655784] [2021-12-07 00:56:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:56:32,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:32,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:32,058 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:32,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:56:32,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 00:56:32,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:32,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:56:32,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:33,032 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-12-07 00:56:33,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 24 [2021-12-07 00:56:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 4 proven. 84 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-07 00:56:33,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:34,049 INFO L354 Elim1Store]: treesize reduction 274, result has 44.2 percent of original size [2021-12-07 00:56:34,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 143 treesize of output 254 [2021-12-07 00:56:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 5 proven. 83 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-07 00:56:34,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564655784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:34,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:34,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13, 13] total 50 [2021-12-07 00:56:34,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666649682] [2021-12-07 00:56:34,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:34,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 00:56:34,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:34,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 00:56:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2195, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 00:56:34,882 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2021-12-07 00:56:34,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 740 places, 1232 transitions, 21326 flow. Second operand has 50 states, 50 states have (on average 69.16) internal successors, (3458), 50 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:34,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:56:34,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2021-12-07 00:56:34,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:58:17,708 INFO L129 PetriNetUnfolder]: 39408/142325 cut-off events. [2021-12-07 00:58:17,709 INFO L130 PetriNetUnfolder]: For 19575252/19576673 co-relation queries the response was YES. [2021-12-07 00:58:22,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1222292 conditions, 142325 events. 39408/142325 cut-off events. For 19575252/19576673 co-relation queries the response was YES. Maximal size of possible extension queue 2503. Compared 2121610 event pairs, 7310 based on Foata normal form. 2327/136764 useless extension candidates. Maximal degree in co-relation 1222035. Up to 33668 conditions per place. [2021-12-07 00:58:23,479 INFO L132 encePairwiseOnDemand]: 108/133 looper letters, 1370 selfloop transitions, 3753 changer transitions 565/5745 dead transitions. [2021-12-07 00:58:23,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 5745 transitions, 136498 flow [2021-12-07 00:58:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-12-07 00:58:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2021-12-07 00:58:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 16753 transitions. [2021-12-07 00:58:23,487 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5292538067858722 [2021-12-07 00:58:23,487 INFO L72 ComplementDD]: Start complementDD. Operand 238 states and 16753 transitions. [2021-12-07 00:58:23,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 238 states and 16753 transitions. [2021-12-07 00:58:23,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:58:23,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 238 states and 16753 transitions. [2021-12-07 00:58:23,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 239 states, 238 states have (on average 70.39075630252101) internal successors, (16753), 238 states have internal predecessors, (16753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:23,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 239 states, 239 states have (on average 133.0) internal successors, (31787), 239 states have internal predecessors, (31787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:23,520 INFO L81 ComplementDD]: Finished complementDD. Result has 239 states, 239 states have (on average 133.0) internal successors, (31787), 239 states have internal predecessors, (31787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:23,520 INFO L186 Difference]: Start difference. First operand has 740 places, 1232 transitions, 21326 flow. Second operand 238 states and 16753 transitions. [2021-12-07 00:58:23,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 5745 transitions, 136498 flow [2021-12-07 00:59:01,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 5745 transitions, 126919 flow, removed 4751 selfloop flow, removed 80 redundant places. [2021-12-07 00:59:01,479 INFO L242 Difference]: Finished difference. Result has 988 places, 4591 transitions, 106786 flow [2021-12-07 00:59:01,480 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=21001, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=238, PETRI_FLOW=106786, PETRI_PLACES=988, PETRI_TRANSITIONS=4591} [2021-12-07 00:59:01,481 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 870 predicate places. [2021-12-07 00:59:01,481 INFO L470 AbstractCegarLoop]: Abstraction has has 988 places, 4591 transitions, 106786 flow [2021-12-07 00:59:01,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 69.16) internal successors, (3458), 50 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:01,481 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:59:01,481 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:01,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:59:01,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:01,683 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:59:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1574854147, now seen corresponding path program 13 times [2021-12-07 00:59:01,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:01,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987749556] [2021-12-07 00:59:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:01,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:04,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:04,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987749556] [2021-12-07 00:59:04,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987749556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:59:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285099805] [2021-12-07 00:59:04,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:59:04,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:04,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:59:04,154 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:59:04,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4f98fb-240d-45d2-b420-9a348a93c6e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:59:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:04,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-07 00:59:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:59:07,132 INFO L354 Elim1Store]: treesize reduction 345, result has 2.8 percent of original size [2021-12-07 00:59:07,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 92 treesize of output 33 [2021-12-07 00:59:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:07,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:59:22,850 INFO L354 Elim1Store]: treesize reduction 295, result has 37.2 percent of original size [2021-12-07 00:59:22,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 212 [2021-12-07 00:59:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 1 proven. 130 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:32,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285099805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:59:32,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:59:32,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 29, 28] total 87 [2021-12-07 00:59:32,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709538335] [2021-12-07 00:59:32,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:59:32,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-07 00:59:32,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-07 00:59:32,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=6851, Unknown=6, NotChecked=0, Total=7482 [2021-12-07 00:59:32,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 133 [2021-12-07 00:59:32,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 988 places, 4591 transitions, 106786 flow. Second operand has 87 states, 87 states have (on average 59.12643678160919) internal successors, (5144), 87 states have internal predecessors, (5144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:59:32,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:59:32,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 133 [2021-12-07 00:59:32,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand