./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN --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 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:53:25,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:53:25,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:53:25,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:53:25,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:53:25,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:53:25,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:53:25,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:53:25,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:53:25,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:53:25,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:53:25,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:53:25,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:53:25,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:53:25,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:53:25,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:53:25,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:53:25,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:53:25,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:53:25,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:53:25,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:53:25,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:53:25,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:53:25,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:53:25,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:53:25,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:53:25,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:53:25,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:53:25,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:53:25,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:53:26,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:53:26,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:53:26,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:53:26,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:53:26,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:53:26,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:53:26,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:53:26,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:53:26,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:53:26,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:53:26,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:53:26,008 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:53:26,030 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:53:26,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:53:26,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:53:26,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:53:26,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:53:26,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:53:26,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:53:26,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:53:26,033 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:53:26,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:53:26,034 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:53:26,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:53:26,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:53:26,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:53:26,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:53:26,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:53:26,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:53:26,035 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:53:26,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:53:26,036 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:53:26,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:53:26,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:53:26,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:53:26,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:53:26,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:53:26,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:53:26,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:53:26,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:53:26,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:53:26,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:53:26,038 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:53:26,039 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:53:26,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:53:26,039 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_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f [2022-11-20 10:53:26,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:53:26,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:53:26,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:53:26,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:53:26,362 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:53:26,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-20 10:53:29,351 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:53:29,565 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:53:29,566 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-20 10:53:29,575 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/data/2058ccace/83d0b5f4ddf442ed8f46c4ee7b5ce3f2/FLAG44cca8458 [2022-11-20 10:53:29,595 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/data/2058ccace/83d0b5f4ddf442ed8f46c4ee7b5ce3f2 [2022-11-20 10:53:29,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:53:29,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:53:29,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:53:29,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:53:29,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:53:29,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6f6855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29, skipping insertion in model container [2022-11-20 10:53:29,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:53:29,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:53:29,831 WARN L237 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_634f5dda-62c3-4c16-87f5-882d3aca4062/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-20 10:53:29,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:53:29,849 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:53:29,873 WARN L237 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_634f5dda-62c3-4c16-87f5-882d3aca4062/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-20 10:53:29,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:53:29,892 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:53:29,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29 WrapperNode [2022-11-20 10:53:29,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:53:29,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:53:29,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:53:29,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:53:29,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,942 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 225 [2022-11-20 10:53:29,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:53:29,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:53:29,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:53:29,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:53:29,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,975 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:29,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:53:29,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:53:29,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:53:29,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:53:29,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (1/1) ... [2022-11-20 10:53:30,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:53:30,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:30,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:53:30,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:53:30,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:53:30,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:53:30,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:53:30,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:53:30,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:53:30,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:53:30,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:53:30,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:53:30,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 10:53:30,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 10:53:30,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:53:30,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:53:30,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:53:30,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:53:30,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:53:30,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:53:30,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:53:30,137 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:53:30,309 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:53:30,311 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:53:30,713 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:53:31,011 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:53:31,012 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 10:53:31,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:53:31 BoogieIcfgContainer [2022-11-20 10:53:31,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:53:31,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:53:31,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:53:31,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:53:31,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:53:29" (1/3) ... [2022-11-20 10:53:31,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a1f9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:53:31, skipping insertion in model container [2022-11-20 10:53:31,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:29" (2/3) ... [2022-11-20 10:53:31,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a1f9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:53:31, skipping insertion in model container [2022-11-20 10:53:31,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:53:31" (3/3) ... [2022-11-20 10:53:31,025 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2022-11-20 10:53:31,034 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:53:31,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:53:31,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:53:31,045 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:53:31,171 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 10:53:31,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 227 transitions, 478 flow [2022-11-20 10:53:31,421 INFO L130 PetriNetUnfolder]: 18/224 cut-off events. [2022-11-20 10:53:31,427 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:53:31,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 224 events. 18/224 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 327 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 186. Up to 2 conditions per place. [2022-11-20 10:53:31,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 227 transitions, 478 flow [2022-11-20 10:53:31,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 213 transitions, 444 flow [2022-11-20 10:53:31,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:53:31,457 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@684adf4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:53:31,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 10:53:31,507 INFO L130 PetriNetUnfolder]: 18/212 cut-off events. [2022-11-20 10:53:31,507 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:53:31,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:31,508 INFO L209 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] [2022-11-20 10:53:31,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:53:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2001770306, now seen corresponding path program 1 times [2022-11-20 10:53:31,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:31,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292158690] [2022-11-20 10:53:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:31,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:31,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:31,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292158690] [2022-11-20 10:53:31,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292158690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:31,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:31,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:31,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820791121] [2022-11-20 10:53:31,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:31,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:53:31,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:53:31,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:53:31,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 227 [2022-11-20 10:53:31,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 213 transitions, 444 flow. Second operand has 2 states, 2 states have (on average 212.0) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:31,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:31,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 227 [2022-11-20 10:53:31,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:32,008 INFO L130 PetriNetUnfolder]: 11/222 cut-off events. [2022-11-20 10:53:32,008 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-20 10:53:32,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 222 events. 11/222 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 458 event pairs, 2 based on Foata normal form. 25/230 useless extension candidates. Maximal degree in co-relation 178. Up to 15 conditions per place. [2022-11-20 10:53:32,011 INFO L137 encePairwiseOnDemand]: 215/227 looper letters, 7 selfloop transitions, 0 changer transitions 4/201 dead transitions. [2022-11-20 10:53:32,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 201 transitions, 434 flow [2022-11-20 10:53:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:53:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:53:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 433 transitions. [2022-11-20 10:53:32,026 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9537444933920705 [2022-11-20 10:53:32,027 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 433 transitions. [2022-11-20 10:53:32,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 433 transitions. [2022-11-20 10:53:32,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:32,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 433 transitions. [2022-11-20 10:53:32,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 216.5) internal successors, (433), 2 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:32,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:32,041 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:32,043 INFO L175 Difference]: Start difference. First operand has 205 places, 213 transitions, 444 flow. Second operand 2 states and 433 transitions. [2022-11-20 10:53:32,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 201 transitions, 434 flow [2022-11-20 10:53:32,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 201 transitions, 422 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 10:53:32,052 INFO L231 Difference]: Finished difference. Result has 200 places, 197 transitions, 400 flow [2022-11-20 10:53:32,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=400, PETRI_PLACES=200, PETRI_TRANSITIONS=197} [2022-11-20 10:53:32,057 INFO L288 CegarLoopForPetriNet]: 205 programPoint places, -5 predicate places. [2022-11-20 10:53:32,058 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 197 transitions, 400 flow [2022-11-20 10:53:32,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 212.0) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:32,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:32,059 INFO L209 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] [2022-11-20 10:53:32,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:53:32,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:53:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:32,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1893205626, now seen corresponding path program 1 times [2022-11-20 10:53:32,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:32,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480474851] [2022-11-20 10:53:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:32,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:32,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:32,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480474851] [2022-11-20 10:53:32,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480474851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:32,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:32,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 10:53:32,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326394777] [2022-11-20 10:53:32,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:32,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:53:32,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:53:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:53:32,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 227 [2022-11-20 10:53:32,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 197 transitions, 400 flow. Second operand has 8 states, 8 states have (on average 170.5) internal successors, (1364), 8 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:32,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:32,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 227 [2022-11-20 10:53:32,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:33,362 INFO L130 PetriNetUnfolder]: 194/825 cut-off events. [2022-11-20 10:53:33,363 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-20 10:53:33,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1125 conditions, 825 events. 194/825 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4244 event pairs, 92 based on Foata normal form. 1/659 useless extension candidates. Maximal degree in co-relation 1122. Up to 270 conditions per place. [2022-11-20 10:53:33,377 INFO L137 encePairwiseOnDemand]: 217/227 looper letters, 42 selfloop transitions, 6 changer transitions 4/205 dead transitions. [2022-11-20 10:53:33,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 205 transitions, 520 flow [2022-11-20 10:53:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:53:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:53:33,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1547 transitions. [2022-11-20 10:53:33,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7572197748409202 [2022-11-20 10:53:33,388 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1547 transitions. [2022-11-20 10:53:33,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1547 transitions. [2022-11-20 10:53:33,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:33,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1547 transitions. [2022-11-20 10:53:33,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.88888888888889) internal successors, (1547), 9 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:33,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 227.0) internal successors, (2270), 10 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:33,404 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 227.0) internal successors, (2270), 10 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:33,405 INFO L175 Difference]: Start difference. First operand has 200 places, 197 transitions, 400 flow. Second operand 9 states and 1547 transitions. [2022-11-20 10:53:33,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 205 transitions, 520 flow [2022-11-20 10:53:33,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 205 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:53:33,417 INFO L231 Difference]: Finished difference. Result has 208 places, 198 transitions, 426 flow [2022-11-20 10:53:33,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=426, PETRI_PLACES=208, PETRI_TRANSITIONS=198} [2022-11-20 10:53:33,419 INFO L288 CegarLoopForPetriNet]: 205 programPoint places, 3 predicate places. [2022-11-20 10:53:33,420 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 198 transitions, 426 flow [2022-11-20 10:53:33,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 170.5) internal successors, (1364), 8 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:33,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:33,422 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-20 10:53:33,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:53:33,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:53:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 790183228, now seen corresponding path program 1 times [2022-11-20 10:53:33,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:33,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144855710] [2022-11-20 10:53:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:33,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:33,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:33,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144855710] [2022-11-20 10:53:33,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144855710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:33,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849417335] [2022-11-20 10:53:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:33,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:33,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:33,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:33,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:53:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:33,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:53:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:34,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:34,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849417335] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:34,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:34,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-11-20 10:53:34,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654309385] [2022-11-20 10:53:34,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:34,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:53:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:53:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:53:34,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 227 [2022-11-20 10:53:34,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 198 transitions, 426 flow. Second operand has 7 states, 7 states have (on average 186.42857142857142) internal successors, (1305), 7 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:34,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:34,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 227 [2022-11-20 10:53:34,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:34,702 INFO L130 PetriNetUnfolder]: 73/535 cut-off events. [2022-11-20 10:53:34,702 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 10:53:34,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 535 events. 73/535 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2097 event pairs, 30 based on Foata normal form. 0/478 useless extension candidates. Maximal degree in co-relation 699. Up to 69 conditions per place. [2022-11-20 10:53:34,713 INFO L137 encePairwiseOnDemand]: 219/227 looper letters, 32 selfloop transitions, 7 changer transitions 0/205 dead transitions. [2022-11-20 10:53:34,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 205 transitions, 520 flow [2022-11-20 10:53:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:53:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:53:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1320 transitions. [2022-11-20 10:53:34,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8307111390811831 [2022-11-20 10:53:34,717 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1320 transitions. [2022-11-20 10:53:34,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1320 transitions. [2022-11-20 10:53:34,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:34,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1320 transitions. [2022-11-20 10:53:34,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:34,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:34,727 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:34,727 INFO L175 Difference]: Start difference. First operand has 208 places, 198 transitions, 426 flow. Second operand 7 states and 1320 transitions. [2022-11-20 10:53:34,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 205 transitions, 520 flow [2022-11-20 10:53:34,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 205 transitions, 504 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-20 10:53:34,735 INFO L231 Difference]: Finished difference. Result has 207 places, 200 transitions, 443 flow [2022-11-20 10:53:34,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=207, PETRI_TRANSITIONS=200} [2022-11-20 10:53:34,740 INFO L288 CegarLoopForPetriNet]: 205 programPoint places, 2 predicate places. [2022-11-20 10:53:34,740 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 200 transitions, 443 flow [2022-11-20 10:53:34,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 186.42857142857142) internal successors, (1305), 7 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:34,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:34,741 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:34,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:34,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:34,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:53:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1915726308, now seen corresponding path program 1 times [2022-11-20 10:53:34,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:34,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742082905] [2022-11-20 10:53:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:34,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:35,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742082905] [2022-11-20 10:53:35,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742082905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569992122] [2022-11-20 10:53:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:35,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:35,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:35,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:35,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:53:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:35,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:53:35,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:35,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:36,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569992122] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:36,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:36,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 19 [2022-11-20 10:53:36,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701772701] [2022-11-20 10:53:36,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:36,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:53:36,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:53:36,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:53:36,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 227 [2022-11-20 10:53:36,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 200 transitions, 443 flow. Second operand has 9 states, 9 states have (on average 179.22222222222223) internal successors, (1613), 9 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:36,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:36,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 227 [2022-11-20 10:53:36,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:36,899 INFO L130 PetriNetUnfolder]: 765/2344 cut-off events. [2022-11-20 10:53:36,899 INFO L131 PetriNetUnfolder]: For 598/822 co-relation queries the response was YES. [2022-11-20 10:53:36,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3925 conditions, 2344 events. 765/2344 cut-off events. For 598/822 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 16232 event pairs, 126 based on Foata normal form. 224/2167 useless extension candidates. Maximal degree in co-relation 3917. Up to 375 conditions per place. [2022-11-20 10:53:36,920 INFO L137 encePairwiseOnDemand]: 214/227 looper letters, 76 selfloop transitions, 18 changer transitions 0/253 dead transitions. [2022-11-20 10:53:36,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 253 transitions, 778 flow [2022-11-20 10:53:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:53:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 10:53:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1849 transitions. [2022-11-20 10:53:36,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8145374449339207 [2022-11-20 10:53:36,924 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1849 transitions. [2022-11-20 10:53:36,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1849 transitions. [2022-11-20 10:53:36,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:36,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1849 transitions. [2022-11-20 10:53:36,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.9) internal successors, (1849), 10 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:36,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 227.0) internal successors, (2497), 11 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:36,936 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 227.0) internal successors, (2497), 11 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:36,936 INFO L175 Difference]: Start difference. First operand has 207 places, 200 transitions, 443 flow. Second operand 10 states and 1849 transitions. [2022-11-20 10:53:36,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 253 transitions, 778 flow [2022-11-20 10:53:36,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 253 transitions, 766 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:53:36,943 INFO L231 Difference]: Finished difference. Result has 217 places, 212 transitions, 543 flow [2022-11-20 10:53:36,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=543, PETRI_PLACES=217, PETRI_TRANSITIONS=212} [2022-11-20 10:53:36,945 INFO L288 CegarLoopForPetriNet]: 205 programPoint places, 12 predicate places. [2022-11-20 10:53:36,945 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 212 transitions, 543 flow [2022-11-20 10:53:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 179.22222222222223) internal successors, (1613), 9 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:36,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:36,947 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:36,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:37,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:37,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:53:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:37,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2034379310, now seen corresponding path program 2 times [2022-11-20 10:53:37,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:37,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12810114] [2022-11-20 10:53:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:37,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:37,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12810114] [2022-11-20 10:53:37,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12810114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657346211] [2022-11-20 10:53:37,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:37,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:37,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:37,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:37,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:53:37,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:53:37,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:53:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:53:37,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:37,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657346211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:37,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:53:37,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-20 10:53:37,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840433705] [2022-11-20 10:53:37,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:37,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:53:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:53:37,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:53:37,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 227 [2022-11-20 10:53:37,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 212 transitions, 543 flow. Second operand has 6 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:37,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:37,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 227 [2022-11-20 10:53:37,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:38,452 INFO L130 PetriNetUnfolder]: 324/1503 cut-off events. [2022-11-20 10:53:38,452 INFO L131 PetriNetUnfolder]: For 672/774 co-relation queries the response was YES. [2022-11-20 10:53:38,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2589 conditions, 1503 events. 324/1503 cut-off events. For 672/774 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8904 event pairs, 68 based on Foata normal form. 113/1485 useless extension candidates. Maximal degree in co-relation 2576. Up to 267 conditions per place. [2022-11-20 10:53:38,468 INFO L137 encePairwiseOnDemand]: 218/227 looper letters, 43 selfloop transitions, 10 changer transitions 0/218 dead transitions. [2022-11-20 10:53:38,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 218 transitions, 672 flow [2022-11-20 10:53:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:53:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 10:53:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1429 transitions. [2022-11-20 10:53:38,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7868942731277533 [2022-11-20 10:53:38,472 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1429 transitions. [2022-11-20 10:53:38,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1429 transitions. [2022-11-20 10:53:38,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:38,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1429 transitions. [2022-11-20 10:53:38,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:38,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:38,481 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:38,481 INFO L175 Difference]: Start difference. First operand has 217 places, 212 transitions, 543 flow. Second operand 8 states and 1429 transitions. [2022-11-20 10:53:38,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 218 transitions, 672 flow [2022-11-20 10:53:38,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 218 transitions, 665 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:53:38,489 INFO L231 Difference]: Finished difference. Result has 221 places, 212 transitions, 563 flow [2022-11-20 10:53:38,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=563, PETRI_PLACES=221, PETRI_TRANSITIONS=212} [2022-11-20 10:53:38,490 INFO L288 CegarLoopForPetriNet]: 205 programPoint places, 16 predicate places. [2022-11-20 10:53:38,491 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 212 transitions, 563 flow [2022-11-20 10:53:38,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:38,491 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:38,491 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:38,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:38,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:38,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:53:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash -784935295, now seen corresponding path program 1 times [2022-11-20 10:53:38,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:38,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427290392] [2022-11-20 10:53:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:38,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:41,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:41,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427290392] [2022-11-20 10:53:41,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427290392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:41,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491762373] [2022-11-20 10:53:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:41,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:41,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:41,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:41,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634f5dda-62c3-4c16-87f5-882d3aca4062/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:53:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:41,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-20 10:53:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:45,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:53:45,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:53:45,763 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 28 [2022-11-20 10:53:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:46,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:48,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:53:48,257 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 37 [2022-11-20 10:53:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:50,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491762373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:50,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:50,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 29] total 91 [2022-11-20 10:53:50,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740768102] [2022-11-20 10:53:50,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:50,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-20 10:53:50,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:50,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-20 10:53:50,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=7457, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 10:53:50,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 227 [2022-11-20 10:53:50,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 212 transitions, 563 flow. Second operand has 91 states, 91 states have (on average 112.8021978021978) internal successors, (10265), 91 states have internal predecessors, (10265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:50,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:50,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 227 [2022-11-20 10:53:50,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand