./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a --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 36e808a478defaa615c1ab442b873bf1dcf0755619d70dbdef8cf1e327b14b9e --- 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-b5237d8 [2022-11-21 13:41:18,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:41:18,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:41:18,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:41:18,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:41:18,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:41:18,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:41:18,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:41:18,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:41:18,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:41:18,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:41:18,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:41:18,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:41:18,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:41:18,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:41:18,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:41:18,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:41:18,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:41:18,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:41:18,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:41:18,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:41:18,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:41:18,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:41:18,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:41:18,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:41:18,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:41:18,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:41:18,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:41:18,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:41:18,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:41:18,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:41:18,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:41:18,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:41:18,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:41:18,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:41:18,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:41:18,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:41:18,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:41:18,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:41:18,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:41:18,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:41:18,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:41:18,400 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:41:18,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:41:18,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:41:18,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:41:18,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:41:18,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:41:18,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:41:18,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:41:18,403 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:41:18,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:41:18,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:41:18,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:41:18,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:41:18,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:41:18,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:41:18,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:41:18,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:41:18,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:41:18,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:41:18,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:41:18,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:41:18,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:41:18,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:41:18,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:41:18,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:41:18,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:41:18,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:41:18,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:41:18,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:41:18,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:41:18,409 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:41:18,409 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:41:18,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:41:18,410 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_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36e808a478defaa615c1ab442b873bf1dcf0755619d70dbdef8cf1e327b14b9e [2022-11-21 13:41:18,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:41:18,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:41:18,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:41:18,738 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:41:18,738 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:41:18,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread/fib_unsafe-5.i [2022-11-21 13:41:21,709 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:41:22,014 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:41:22,015 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/sv-benchmarks/c/pthread/fib_unsafe-5.i [2022-11-21 13:41:22,036 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/data/1f1addf65/6ed5339cb46546aa81a5252549efaae1/FLAG876c8f81e [2022-11-21 13:41:22,054 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/data/1f1addf65/6ed5339cb46546aa81a5252549efaae1 [2022-11-21 13:41:22,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:41:22,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:41:22,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:41:22,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:41:22,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:41:22,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f37218b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22, skipping insertion in model container [2022-11-21 13:41:22,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:41:22,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:41:22,515 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_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/sv-benchmarks/c/pthread/fib_unsafe-5.i[30243,30256] [2022-11-21 13:41:22,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:41:22,559 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:41:22,615 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_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/sv-benchmarks/c/pthread/fib_unsafe-5.i[30243,30256] [2022-11-21 13:41:22,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:41:22,652 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:41:22,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22 WrapperNode [2022-11-21 13:41:22,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:41:22,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:41:22,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:41:22,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:41:22,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,716 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-21 13:41:22,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:41:22,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:41:22,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:41:22,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:41:22,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,764 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:41:22,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:41:22,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:41:22,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:41:22,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (1/1) ... [2022-11-21 13:41:22,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:41:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:41:22,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:41:22,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:41:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-21 13:41:22,855 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-21 13:41:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-21 13:41:22,855 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-21 13:41:22,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:41:22,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 13:41:22,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:41:22,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:41:22,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:41:22,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:41:22,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 13:41:22,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:41:22,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:41:22,859 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 13:41:23,012 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:41:23,022 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:41:23,277 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:41:23,283 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:41:23,284 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 13:41:23,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:41:23 BoogieIcfgContainer [2022-11-21 13:41:23,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:41:23,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:41:23,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:41:23,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:41:23,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:41:22" (1/3) ... [2022-11-21 13:41:23,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6677faf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:41:23, skipping insertion in model container [2022-11-21 13:41:23,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:41:22" (2/3) ... [2022-11-21 13:41:23,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6677faf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:41:23, skipping insertion in model container [2022-11-21 13:41:23,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:41:23" (3/3) ... [2022-11-21 13:41:23,303 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2022-11-21 13:41:23,314 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 13:41:23,325 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:41:23,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 13:41:23,326 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 13:41:23,415 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 13:41:23,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-11-21 13:41:23,522 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-21 13:41:23,522 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:41:23,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-11-21 13:41:23,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-11-21 13:41:23,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-11-21 13:41:23,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:41:23,565 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;@1472915d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:41:23,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 13:41:23,628 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-21 13:41:23,628 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:41:23,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:41:23,629 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] [2022-11-21 13:41:23,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:41:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:41:23,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1490454520, now seen corresponding path program 1 times [2022-11-21 13:41:23,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:41:23,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651654402] [2022-11-21 13:41:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:41:23,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:41:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:41:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:23,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:41:23,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651654402] [2022-11-21 13:41:23,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651654402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:41:23,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:41:23,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:41:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832996901] [2022-11-21 13:41:23,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:41:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 13:41:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:41:23,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 13:41:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 13:41:23,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 101 [2022-11-21 13:41:23,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:23,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:41:23,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 101 [2022-11-21 13:41:23,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:41:24,053 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-21 13:41:24,053 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 13:41:24,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 94 events. 3/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 5/95 useless extension candidates. Maximal degree in co-relation 66. Up to 3 conditions per place. [2022-11-21 13:41:24,057 INFO L137 encePairwiseOnDemand]: 97/101 looper letters, 2 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2022-11-21 13:41:24,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 198 flow [2022-11-21 13:41:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 13:41:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 13:41:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2022-11-21 13:41:24,073 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9603960396039604 [2022-11-21 13:41:24,074 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 194 transitions. [2022-11-21 13:41:24,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 194 transitions. [2022-11-21 13:41:24,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:41:24,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 194 transitions. [2022-11-21 13:41:24,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:24,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:24,095 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:24,096 INFO L175 Difference]: Start difference. First operand has 99 places, 99 transitions, 204 flow. Second operand 2 states and 194 transitions. [2022-11-21 13:41:24,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 198 flow [2022-11-21 13:41:24,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 13:41:24,123 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 192 flow [2022-11-21 13:41:24,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2022-11-21 13:41:24,129 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -2 predicate places. [2022-11-21 13:41:24,129 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 192 flow [2022-11-21 13:41:24,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:24,130 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:41:24,130 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] [2022-11-21 13:41:24,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:41:24,130 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:41:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:41:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash 984895895, now seen corresponding path program 1 times [2022-11-21 13:41:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:41:24,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506185755] [2022-11-21 13:41:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:41:24,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:41:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:41:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:24,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:41:24,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506185755] [2022-11-21 13:41:24,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506185755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:41:24,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:41:24,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:41:24,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845117253] [2022-11-21 13:41:24,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:41:24,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:41:24,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:41:24,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:41:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:41:24,497 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 101 [2022-11-21 13:41:24,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:24,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:41:24,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 101 [2022-11-21 13:41:24,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:41:24,547 INFO L130 PetriNetUnfolder]: 3/100 cut-off events. [2022-11-21 13:41:24,547 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:41:24,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 100 events. 3/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2022-11-21 13:41:24,549 INFO L137 encePairwiseOnDemand]: 98/101 looper letters, 9 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2022-11-21 13:41:24,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 97 transitions, 220 flow [2022-11-21 13:41:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:41:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:41:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2022-11-21 13:41:24,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9108910891089109 [2022-11-21 13:41:24,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2022-11-21 13:41:24,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2022-11-21 13:41:24,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:41:24,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2022-11-21 13:41:24,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:24,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:24,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:24,557 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 192 flow. Second operand 3 states and 276 transitions. [2022-11-21 13:41:24,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 97 transitions, 220 flow [2022-11-21 13:41:24,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:41:24,561 INFO L231 Difference]: Finished difference. Result has 100 places, 95 transitions, 204 flow [2022-11-21 13:41:24,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2022-11-21 13:41:24,562 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2022-11-21 13:41:24,562 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 204 flow [2022-11-21 13:41:24,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:24,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:41:24,563 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] [2022-11-21 13:41:24,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:41:24,564 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:41:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:41:24,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1771632260, now seen corresponding path program 1 times [2022-11-21 13:41:24,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:41:24,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291468078] [2022-11-21 13:41:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:41:24,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:41:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:41:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:24,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:41:24,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291468078] [2022-11-21 13:41:24,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291468078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:41:24,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399544949] [2022-11-21 13:41:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:41:24,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:41:24,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:41:24,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:41:24,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:41:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:41:24,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:41:24,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:41:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:25,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:41:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:25,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399544949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:41:25,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:41:25,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:41:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396501259] [2022-11-21 13:41:25,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:41:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:41:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:41:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:41:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:41:25,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-21 13:41:25,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 204 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:25,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:41:25,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-21 13:41:25,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:41:25,313 INFO L130 PetriNetUnfolder]: 3/109 cut-off events. [2022-11-21 13:41:25,317 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 13:41:25,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 109 events. 3/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2022-11-21 13:41:25,324 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 10 selfloop transitions, 9 changer transitions 0/103 dead transitions. [2022-11-21 13:41:25,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 260 flow [2022-11-21 13:41:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:41:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 13:41:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 795 transitions. [2022-11-21 13:41:25,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8745874587458746 [2022-11-21 13:41:25,339 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 795 transitions. [2022-11-21 13:41:25,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 795 transitions. [2022-11-21 13:41:25,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:41:25,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 795 transitions. [2022-11-21 13:41:25,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:25,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:25,347 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:25,348 INFO L175 Difference]: Start difference. First operand has 100 places, 95 transitions, 204 flow. Second operand 9 states and 795 transitions. [2022-11-21 13:41:25,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 260 flow [2022-11-21 13:41:25,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 103 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:41:25,351 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 252 flow [2022-11-21 13:41:25,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2022-11-21 13:41:25,352 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 11 predicate places. [2022-11-21 13:41:25,353 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 252 flow [2022-11-21 13:41:25,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:25,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:41:25,354 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:41:25,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 13:41:25,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:41:25,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:41:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:41:25,561 INFO L85 PathProgramCache]: Analyzing trace with hash -293511388, now seen corresponding path program 2 times [2022-11-21 13:41:25,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:41:25,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424788309] [2022-11-21 13:41:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:41:25,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:41:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:41:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:25,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:41:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424788309] [2022-11-21 13:41:25,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424788309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:41:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117437388] [2022-11-21 13:41:25,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:41:25,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:41:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:41:25,784 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:41:25,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:41:25,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:41:25,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:41:25,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:41:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:41:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:26,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:41:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:26,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117437388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:41:26,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:41:26,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 13:41:26,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811798542] [2022-11-21 13:41:26,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:41:26,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:41:26,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:41:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:41:26,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:41:26,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-21 13:41:26,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 252 flow. Second operand has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:26,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:41:26,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-21 13:41:26,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:41:26,502 INFO L130 PetriNetUnfolder]: 3/137 cut-off events. [2022-11-21 13:41:26,502 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-21 13:41:26,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 137 events. 3/137 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/138 useless extension candidates. Maximal degree in co-relation 229. Up to 11 conditions per place. [2022-11-21 13:41:26,504 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 14 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2022-11-21 13:41:26,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 418 flow [2022-11-21 13:41:26,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 13:41:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 13:41:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1845 transitions. [2022-11-21 13:41:26,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8698727015558698 [2022-11-21 13:41:26,511 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1845 transitions. [2022-11-21 13:41:26,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1845 transitions. [2022-11-21 13:41:26,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:41:26,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1845 transitions. [2022-11-21 13:41:26,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.85714285714286) internal successors, (1845), 21 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:26,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:26,524 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:26,525 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 252 flow. Second operand 21 states and 1845 transitions. [2022-11-21 13:41:26,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 418 flow [2022-11-21 13:41:26,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 404 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-21 13:41:26,534 INFO L231 Difference]: Finished difference. Result has 134 places, 114 transitions, 376 flow [2022-11-21 13:41:26,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=376, PETRI_PLACES=134, PETRI_TRANSITIONS=114} [2022-11-21 13:41:26,536 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 35 predicate places. [2022-11-21 13:41:26,536 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 114 transitions, 376 flow [2022-11-21 13:41:26,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:26,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:41:26,540 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:41:26,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:41:26,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:41:26,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:41:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:41:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash -379492252, now seen corresponding path program 3 times [2022-11-21 13:41:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:41:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993265945] [2022-11-21 13:41:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:41:26,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:41:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:41:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:27,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:41:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993265945] [2022-11-21 13:41:27,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993265945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:41:27,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010511562] [2022-11-21 13:41:27,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:41:27,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:41:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:41:27,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:41:27,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:41:27,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-21 13:41:27,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:41:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 13:41:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:41:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:27,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:41:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:27,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010511562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:41:27,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:41:27,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2022-11-21 13:41:27,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543385311] [2022-11-21 13:41:27,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:41:27,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 13:41:27,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:41:27,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 13:41:27,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-11-21 13:41:27,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-21 13:41:27,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 114 transitions, 376 flow. Second operand has 27 states, 27 states have (on average 88.07407407407408) internal successors, (2378), 27 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:27,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:41:27,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-21 13:41:27,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:41:28,427 INFO L130 PetriNetUnfolder]: 3/172 cut-off events. [2022-11-21 13:41:28,427 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-11-21 13:41:28,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 172 events. 3/172 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 5/174 useless extension candidates. Maximal degree in co-relation 374. Up to 21 conditions per place. [2022-11-21 13:41:28,430 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 19 selfloop transitions, 36 changer transitions 0/139 dead transitions. [2022-11-21 13:41:28,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 139 transitions, 678 flow [2022-11-21 13:41:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-21 13:41:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-21 13:41:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3156 transitions. [2022-11-21 13:41:28,438 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8679867986798679 [2022-11-21 13:41:28,439 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3156 transitions. [2022-11-21 13:41:28,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3156 transitions. [2022-11-21 13:41:28,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:41:28,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3156 transitions. [2022-11-21 13:41:28,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 87.66666666666667) internal successors, (3156), 36 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:28,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 101.0) internal successors, (3737), 37 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:28,462 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 101.0) internal successors, (3737), 37 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:28,462 INFO L175 Difference]: Start difference. First operand has 134 places, 114 transitions, 376 flow. Second operand 36 states and 3156 transitions. [2022-11-21 13:41:28,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 139 transitions, 678 flow [2022-11-21 13:41:28,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 139 transitions, 644 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-11-21 13:41:28,473 INFO L231 Difference]: Finished difference. Result has 169 places, 130 transitions, 564 flow [2022-11-21 13:41:28,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=564, PETRI_PLACES=169, PETRI_TRANSITIONS=130} [2022-11-21 13:41:28,476 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 70 predicate places. [2022-11-21 13:41:28,476 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 130 transitions, 564 flow [2022-11-21 13:41:28,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 88.07407407407408) internal successors, (2378), 27 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:28,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:41:28,478 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:41:28,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:41:28,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:41:28,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:41:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:41:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash 962690519, now seen corresponding path program 4 times [2022-11-21 13:41:28,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:41:28,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650485498] [2022-11-21 13:41:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:41:28,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:41:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:41:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:31,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:41:31,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650485498] [2022-11-21 13:41:31,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650485498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:41:31,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692046896] [2022-11-21 13:41:31,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:41:31,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:41:31,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:41:31,678 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:41:31,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:41:31,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:41:31,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:41:31,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-21 13:41:31,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:41:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:36,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:41:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:41:40,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692046896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:41:40,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:41:40,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 127 [2022-11-21 13:41:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297836863] [2022-11-21 13:41:40,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:41:40,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-11-21 13:41:40,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:41:40,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-11-21 13:41:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=981, Invalid=15021, Unknown=0, NotChecked=0, Total=16002 [2022-11-21 13:41:40,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 101 [2022-11-21 13:41:40,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 130 transitions, 564 flow. Second operand has 127 states, 127 states have (on average 70.2755905511811) internal successors, (8925), 127 states have internal predecessors, (8925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:41:40,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:41:40,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 101 [2022-11-21 13:41:40,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:34,371 INFO L130 PetriNetUnfolder]: 24385/87461 cut-off events. [2022-11-21 13:45:34,372 INFO L131 PetriNetUnfolder]: For 18962/18962 co-relation queries the response was YES. [2022-11-21 13:45:34,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142052 conditions, 87461 events. 24385/87461 cut-off events. For 18962/18962 co-relation queries the response was YES. Maximal size of possible extension queue 1409. Compared 1195575 event pairs, 0 based on Foata normal form. 0/80880 useless extension candidates. Maximal degree in co-relation 142034. Up to 12310 conditions per place. [2022-11-21 13:45:35,154 INFO L137 encePairwiseOnDemand]: 84/101 looper letters, 1113 selfloop transitions, 1743 changer transitions 936/3886 dead transitions. [2022-11-21 13:45:35,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 969 places, 3886 transitions, 15654 flow [2022-11-21 13:45:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 801 states. [2022-11-21 13:45:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2022-11-21 13:45:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 59133 transitions. [2022-11-21 13:45:35,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7309303964104276 [2022-11-21 13:45:35,279 INFO L72 ComplementDD]: Start complementDD. Operand 801 states and 59133 transitions. [2022-11-21 13:45:35,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 801 states and 59133 transitions. [2022-11-21 13:45:35,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:35,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 801 states and 59133 transitions. [2022-11-21 13:45:35,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 802 states, 801 states have (on average 73.82397003745318) internal successors, (59133), 801 states have internal predecessors, (59133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:35,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 802 states, 802 states have (on average 101.0) internal successors, (81002), 802 states have internal predecessors, (81002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:35,839 INFO L81 ComplementDD]: Finished complementDD. Result has 802 states, 802 states have (on average 101.0) internal successors, (81002), 802 states have internal predecessors, (81002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:35,839 INFO L175 Difference]: Start difference. First operand has 169 places, 130 transitions, 564 flow. Second operand 801 states and 59133 transitions. [2022-11-21 13:45:35,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 969 places, 3886 transitions, 15654 flow [2022-11-21 13:45:36,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 951 places, 3886 transitions, 15604 flow, removed 7 selfloop flow, removed 18 redundant places. [2022-11-21 13:45:36,115 INFO L231 Difference]: Finished difference. Result has 1269 places, 1896 transitions, 8618 flow [2022-11-21 13:45:36,116 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=801, PETRI_FLOW=8618, PETRI_PLACES=1269, PETRI_TRANSITIONS=1896} [2022-11-21 13:45:36,117 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 1170 predicate places. [2022-11-21 13:45:36,117 INFO L495 AbstractCegarLoop]: Abstraction has has 1269 places, 1896 transitions, 8618 flow [2022-11-21 13:45:36,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 70.2755905511811) internal successors, (8925), 127 states have internal predecessors, (8925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:36,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:36,120 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:45:36,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:36,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 13:45:36,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 13:45:36,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:36,333 INFO L85 PathProgramCache]: Analyzing trace with hash 317445647, now seen corresponding path program 1 times [2022-11-21 13:45:36,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:36,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180698494] [2022-11-21 13:45:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:36,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:39,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:39,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180698494] [2022-11-21 13:45:39,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180698494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:39,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061597379] [2022-11-21 13:45:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:39,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:39,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:39,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:39,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e257c0e6-1a6c-40ee-bf2e-024822f8c7da/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:45:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:39,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-21 13:45:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:43,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:48,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061597379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:48,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:48,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 136 [2022-11-21 13:45:48,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426839133] [2022-11-21 13:45:48,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:48,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-11-21 13:45:48,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-11-21 13:45:48,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=17358, Unknown=0, NotChecked=0, Total=18360 [2022-11-21 13:45:48,666 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 101 [2022-11-21 13:45:48,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1269 places, 1896 transitions, 8618 flow. Second operand has 136 states, 136 states have (on average 70.26470588235294) internal successors, (9556), 136 states have internal predecessors, (9556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:48,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:48,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 101 [2022-11-21 13:45:48,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand