./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS --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 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 --- 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-4e7fbc6 [2022-11-23 01:54:18,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 01:54:18,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 01:54:18,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 01:54:18,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 01:54:18,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 01:54:18,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 01:54:18,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 01:54:18,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 01:54:18,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 01:54:18,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 01:54:18,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 01:54:18,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 01:54:18,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 01:54:18,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 01:54:18,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 01:54:18,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 01:54:18,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 01:54:18,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 01:54:18,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 01:54:18,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 01:54:18,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 01:54:18,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 01:54:18,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 01:54:18,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 01:54:18,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 01:54:18,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 01:54:18,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 01:54:18,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 01:54:18,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 01:54:18,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 01:54:18,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 01:54:18,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 01:54:18,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 01:54:18,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 01:54:18,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 01:54:18,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 01:54:18,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 01:54:18,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 01:54:18,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 01:54:18,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 01:54:18,582 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 01:54:18,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 01:54:18,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 01:54:18,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 01:54:18,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 01:54:18,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 01:54:18,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 01:54:18,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 01:54:18,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 01:54:18,629 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 01:54:18,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 01:54:18,630 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 01:54:18,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 01:54:18,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 01:54:18,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 01:54:18,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 01:54:18,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 01:54:18,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 01:54:18,632 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 01:54:18,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 01:54:18,632 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 01:54:18,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 01:54:18,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 01:54:18,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 01:54:18,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 01:54:18,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:54:18,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 01:54:18,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 01:54:18,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 01:54:18,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 01:54:18,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 01:54:18,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 01:54:18,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 01:54:18,635 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 01:54:18,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 01:54:18,636 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 [2022-11-23 01:54:18,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 01:54:18,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 01:54:18,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 01:54:18,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 01:54:18,959 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 01:54:18,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread/fib_safe-11.i [2022-11-23 01:54:22,041 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 01:54:22,309 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 01:54:22,311 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/sv-benchmarks/c/pthread/fib_safe-11.i [2022-11-23 01:54:22,325 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/data/1a3bfce7a/1f1b491aec7c4527ad85e8c98331001c/FLAG529e8ea63 [2022-11-23 01:54:22,338 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/data/1a3bfce7a/1f1b491aec7c4527ad85e8c98331001c [2022-11-23 01:54:22,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 01:54:22,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 01:54:22,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 01:54:22,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 01:54:22,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 01:54:22,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f92abcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22, skipping insertion in model container [2022-11-23 01:54:22,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 01:54:22,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:54:22,703 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_93224ce0-3cc4-43a2-a5b6-902b7075f67a/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-11-23 01:54:22,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:54:22,747 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 01:54:22,806 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_93224ce0-3cc4-43a2-a5b6-902b7075f67a/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-11-23 01:54:22,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:54:22,856 INFO L208 MainTranslator]: Completed translation [2022-11-23 01:54:22,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22 WrapperNode [2022-11-23 01:54:22,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 01:54:22,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 01:54:22,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 01:54:22,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 01:54:22,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,919 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-23 01:54:22,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 01:54:22,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 01:54:22,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 01:54:22,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 01:54:22,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,957 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 01:54:22,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 01:54:22,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 01:54:22,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 01:54:22,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (1/1) ... [2022-11-23 01:54:22,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:54:22,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:23,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 01:54:23,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 01:54:23,052 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-23 01:54:23,052 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-23 01:54:23,052 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-23 01:54:23,052 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-23 01:54:23,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 01:54:23,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 01:54:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 01:54:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 01:54:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 01:54:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 01:54:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 01:54:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 01:54:23,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 01:54:23,056 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 01:54:23,260 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 01:54:23,262 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 01:54:23,429 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 01:54:23,436 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 01:54:23,436 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 01:54:23,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:54:23 BoogieIcfgContainer [2022-11-23 01:54:23,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 01:54:23,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 01:54:23,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 01:54:23,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 01:54:23,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:54:22" (1/3) ... [2022-11-23 01:54:23,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4497d11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:54:23, skipping insertion in model container [2022-11-23 01:54:23,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:22" (2/3) ... [2022-11-23 01:54:23,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4497d11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:54:23, skipping insertion in model container [2022-11-23 01:54:23,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:54:23" (3/3) ... [2022-11-23 01:54:23,448 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2022-11-23 01:54:23,464 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 01:54:23,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 01:54:23,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 01:54:23,474 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 01:54:23,524 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 01:54:23,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-11-23 01:54:23,612 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-23 01:54:23,613 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:54:23,619 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. [2022-11-23 01:54:23,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-11-23 01:54:23,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-11-23 01:54:23,629 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 01:54:23,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 204 flow [2022-11-23 01:54:23,652 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 204 flow [2022-11-23 01:54:23,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 204 flow [2022-11-23 01:54:23,687 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-23 01:54:23,687 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:54:23,688 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. [2022-11-23 01:54:23,690 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2022-11-23 01:54:27,374 INFO L134 LiptonReduction]: Checked pairs total: 1553 [2022-11-23 01:54:27,374 INFO L136 LiptonReduction]: Total number of compositions: 98 [2022-11-23 01:54:27,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:54:27,409 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;@4b89029c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:54:27,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 01:54:27,417 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-11-23 01:54:27,417 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:54:27,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:54:27,419 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 01:54:27,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 01:54:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1613159743, now seen corresponding path program 1 times [2022-11-23 01:54:27,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:27,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134910625] [2022-11-23 01:54:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:27,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:27,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:27,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134910625] [2022-11-23 01:54:27,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134910625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:54:27,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:54:27,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:54:27,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328013099] [2022-11-23 01:54:27,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:54:27,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:54:27,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:27,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:54:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:54:27,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 199 [2022-11-23 01:54:27,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 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) [2022-11-23 01:54:27,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:54:27,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 199 [2022-11-23 01:54:27,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:54:27,839 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-11-23 01:54:27,840 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 01:54:27,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 336 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2022-11-23 01:54:27,845 INFO L137 encePairwiseOnDemand]: 195/199 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-11-23 01:54:27,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-11-23 01:54:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:54:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:54:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2022-11-23 01:54:27,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.490787269681742 [2022-11-23 01:54:27,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2022-11-23 01:54:27,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2022-11-23 01:54:27,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:54:27,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2022-11-23 01:54:27,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:27,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:27,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:27,910 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 293 transitions. [2022-11-23 01:54:27,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-11-23 01:54:27,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:54:27,914 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-11-23 01:54:27,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-11-23 01:54:27,919 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-11-23 01:54:27,920 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-11-23 01:54:27,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-11-23 01:54:27,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:54:27,920 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:54:27,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 01:54:27,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 01:54:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:27,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1531655777, now seen corresponding path program 1 times [2022-11-23 01:54:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:27,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763209500] [2022-11-23 01:54:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:28,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763209500] [2022-11-23 01:54:28,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763209500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:54:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754916435] [2022-11-23 01:54:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:28,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:28,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:54:28,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 01:54:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:28,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 01:54:28,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:54:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:28,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:54:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:28,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754916435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:54:28,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:54:28,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 01:54:28,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753690769] [2022-11-23 01:54:28,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:54:28,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 01:54:28,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 01:54:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 01:54:28,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-23 01:54:28,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:28,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:54:28,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-23 01:54:28,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:54:28,407 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-11-23 01:54:28,407 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 01:54:28,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 452 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2022-11-23 01:54:28,410 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-11-23 01:54:28,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-11-23 01:54:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 01:54:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 01:54:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-11-23 01:54:28,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48408710217755446 [2022-11-23 01:54:28,419 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-11-23 01:54:28,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-11-23 01:54:28,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:54:28,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-11-23 01:54:28,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:28,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:28,428 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:28,428 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 578 transitions. [2022-11-23 01:54:28,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-11-23 01:54:28,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:54:28,431 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-11-23 01:54:28,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2022-11-23 01:54:28,432 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-11-23 01:54:28,433 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-11-23 01:54:28,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:28,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:54:28,434 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-23 01:54:28,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 01:54:28,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:28,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 01:54:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash -175043903, now seen corresponding path program 2 times [2022-11-23 01:54:28,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:28,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673687461] [2022-11-23 01:54:28,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:28,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673687461] [2022-11-23 01:54:28,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673687461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:54:28,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077362190] [2022-11-23 01:54:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:54:28,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:28,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:28,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:54:28,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 01:54:28,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:54:28,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:54:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 01:54:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:54:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:28,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:54:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:29,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077362190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:54:29,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:54:29,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 01:54:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765191322] [2022-11-23 01:54:29,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:54:29,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 01:54:29,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 01:54:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 01:54:29,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-23 01:54:29,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:29,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:54:29,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-23 01:54:29,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:54:29,233 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-11-23 01:54:29,233 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-11-23 01:54:29,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 847 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2022-11-23 01:54:29,242 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-11-23 01:54:29,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-11-23 01:54:29,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 01:54:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 01:54:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1157 transitions. [2022-11-23 01:54:29,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48450586264656614 [2022-11-23 01:54:29,247 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1157 transitions. [2022-11-23 01:54:29,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1157 transitions. [2022-11-23 01:54:29,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:54:29,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1157 transitions. [2022-11-23 01:54:29,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:29,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 199.0) internal successors, (2587), 13 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:29,258 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 199.0) internal successors, (2587), 13 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:29,258 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1157 transitions. [2022-11-23 01:54:29,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-11-23 01:54:29,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 01:54:29,266 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-11-23 01:54:29,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2022-11-23 01:54:29,268 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-11-23 01:54:29,268 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-11-23 01:54:29,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:29,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:54:29,269 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-23 01:54:29,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 01:54:29,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:29,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 01:54:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1805870785, now seen corresponding path program 3 times [2022-11-23 01:54:29,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:29,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034553885] [2022-11-23 01:54:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:29,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:29,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:29,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034553885] [2022-11-23 01:54:29,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034553885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:54:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066089127] [2022-11-23 01:54:29,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 01:54:29,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:29,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:29,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:54:29,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 01:54:29,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 01:54:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:54:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 01:54:29,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:54:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:29,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:54:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:30,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066089127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:54:30,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:54:30,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 01:54:30,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907718238] [2022-11-23 01:54:30,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:54:30,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 01:54:30,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 01:54:30,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-23 01:54:30,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-23 01:54:30,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:30,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:54:30,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-23 01:54:30,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:54:30,627 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-11-23 01:54:30,627 INFO L131 PetriNetUnfolder]: For 4212/4212 co-relation queries the response was YES. [2022-11-23 01:54:30,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4212/4212 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1645 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2022-11-23 01:54:30,633 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-11-23 01:54:30,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2022-11-23 01:54:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 01:54:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 01:54:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2315 transitions. [2022-11-23 01:54:30,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48471524288107204 [2022-11-23 01:54:30,640 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2315 transitions. [2022-11-23 01:54:30,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2315 transitions. [2022-11-23 01:54:30,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:54:30,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2315 transitions. [2022-11-23 01:54:30,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.45833333333333) internal successors, (2315), 24 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:30,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 199.0) internal successors, (4975), 25 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:30,657 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 199.0) internal successors, (4975), 25 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:30,657 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2315 transitions. [2022-11-23 01:54:30,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2022-11-23 01:54:30,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-23 01:54:30,665 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2022-11-23 01:54:30,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2022-11-23 01:54:30,666 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2022-11-23 01:54:30,666 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2022-11-23 01:54:30,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:30,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:54:30,667 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-23 01:54:30,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 01:54:30,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:30,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 01:54:30,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:30,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1256791745, now seen corresponding path program 4 times [2022-11-23 01:54:30,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:30,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947088867] [2022-11-23 01:54:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:30,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:31,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:31,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947088867] [2022-11-23 01:54:31,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947088867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:54:31,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079517206] [2022-11-23 01:54:31,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 01:54:31,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:31,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:31,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:54:31,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 01:54:31,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 01:54:31,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:54:31,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 01:54:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:54:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:31,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:54:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:32,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079517206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:54:32,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:54:32,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-11-23 01:54:32,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257958728] [2022-11-23 01:54:32,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:54:32,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 01:54:32,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:32,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 01:54:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-23 01:54:32,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-23 01:54:32,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 27 states, 27 states have (on average 90.22222222222223) internal successors, (2436), 27 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:32,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:54:32,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-23 01:54:32,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:54:32,520 INFO L130 PetriNetUnfolder]: 493/743 cut-off events. [2022-11-23 01:54:32,521 INFO L131 PetriNetUnfolder]: For 5562/5562 co-relation queries the response was YES. [2022-11-23 01:54:32,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 743 events. 493/743 cut-off events. For 5562/5562 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1775 event pairs, 20 based on Foata normal form. 18/597 useless extension candidates. Maximal degree in co-relation 2388. Up to 166 conditions per place. [2022-11-23 01:54:32,529 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 156 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2022-11-23 01:54:32,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 181 transitions, 932 flow [2022-11-23 01:54:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 01:54:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-23 01:54:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2497 transitions. [2022-11-23 01:54:32,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48260533436412834 [2022-11-23 01:54:32,537 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2497 transitions. [2022-11-23 01:54:32,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2497 transitions. [2022-11-23 01:54:32,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:54:32,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2497 transitions. [2022-11-23 01:54:32,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 96.03846153846153) internal successors, (2497), 26 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:32,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 199.0) internal successors, (5373), 27 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:32,555 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 199.0) internal successors, (5373), 27 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:32,555 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 26 states and 2497 transitions. [2022-11-23 01:54:32,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 181 transitions, 932 flow [2022-11-23 01:54:32,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 181 transitions, 832 flow, removed 39 selfloop flow, removed 11 redundant places. [2022-11-23 01:54:32,578 INFO L231 Difference]: Finished difference. Result has 87 places, 37 transitions, 242 flow [2022-11-23 01:54:32,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=242, PETRI_PLACES=87, PETRI_TRANSITIONS=37} [2022-11-23 01:54:32,594 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 69 predicate places. [2022-11-23 01:54:32,595 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 37 transitions, 242 flow [2022-11-23 01:54:32,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.22222222222223) internal successors, (2436), 27 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:32,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:54:32,596 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-11-23 01:54:32,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 01:54:32,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:32,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 01:54:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:32,803 INFO L85 PathProgramCache]: Analyzing trace with hash 891065025, now seen corresponding path program 5 times [2022-11-23 01:54:32,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:32,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234913626] [2022-11-23 01:54:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:32,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:34,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234913626] [2022-11-23 01:54:34,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234913626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:54:34,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349672607] [2022-11-23 01:54:34,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 01:54:34,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:34,809 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:54:34,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 01:54:34,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-23 01:54:34,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:54:34,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-23 01:54:34,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:54:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:36,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:54:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:38,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349672607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:54:38,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:54:38,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-11-23 01:54:38,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738576772] [2022-11-23 01:54:38,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:54:38,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-23 01:54:38,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:38,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-23 01:54:38,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4795, Unknown=0, NotChecked=0, Total=5852 [2022-11-23 01:54:40,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 199 [2022-11-23 01:54:40,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 37 transitions, 242 flow. Second operand has 77 states, 77 states have (on average 85.16883116883118) internal successors, (6558), 77 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:40,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:54:40,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 199 [2022-11-23 01:54:40,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:56:02,069 INFO L130 PetriNetUnfolder]: 88123/132204 cut-off events. [2022-11-23 01:56:02,069 INFO L131 PetriNetUnfolder]: For 744360/744360 co-relation queries the response was YES. [2022-11-23 01:56:02,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415878 conditions, 132204 events. 88123/132204 cut-off events. For 744360/744360 co-relation queries the response was YES. Maximal size of possible extension queue 2533. Compared 988755 event pairs, 102 based on Foata normal form. 209/99387 useless extension candidates. Maximal degree in co-relation 415842. Up to 27554 conditions per place. [2022-11-23 01:56:03,350 INFO L137 encePairwiseOnDemand]: 194/199 looper letters, 1759 selfloop transitions, 5877 changer transitions 0/7636 dead transitions. [2022-11-23 01:56:03,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 7636 transitions, 68095 flow [2022-11-23 01:56:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2022-11-23 01:56:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2022-11-23 01:56:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 32381 transitions. [2022-11-23 01:56:03,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4622687300137049 [2022-11-23 01:56:03,424 INFO L72 ComplementDD]: Start complementDD. Operand 352 states and 32381 transitions. [2022-11-23 01:56:03,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 352 states and 32381 transitions. [2022-11-23 01:56:03,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:56:03,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 352 states and 32381 transitions. [2022-11-23 01:56:03,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 353 states, 352 states have (on average 91.99147727272727) internal successors, (32381), 352 states have internal predecessors, (32381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:03,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 353 states, 353 states have (on average 199.0) internal successors, (70247), 353 states have internal predecessors, (70247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:03,648 INFO L81 ComplementDD]: Finished complementDD. Result has 353 states, 353 states have (on average 199.0) internal successors, (70247), 353 states have internal predecessors, (70247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:03,649 INFO L175 Difference]: Start difference. First operand has 87 places, 37 transitions, 242 flow. Second operand 352 states and 32381 transitions. [2022-11-23 01:56:03,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 7636 transitions, 68095 flow [2022-11-23 01:56:14,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 7636 transitions, 55189 flow, removed 2193 selfloop flow, removed 23 redundant places. [2022-11-23 01:56:14,096 INFO L231 Difference]: Finished difference. Result has 443 places, 5914 transitions, 35639 flow [2022-11-23 01:56:14,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=352, PETRI_FLOW=35639, PETRI_PLACES=443, PETRI_TRANSITIONS=5914} [2022-11-23 01:56:14,097 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 425 predicate places. [2022-11-23 01:56:14,098 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 5914 transitions, 35639 flow [2022-11-23 01:56:14,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 85.16883116883118) internal successors, (6558), 77 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:14,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:56:14,100 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:56:14,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 01:56:14,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:56:14,305 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 01:56:14,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:56:14,306 INFO L85 PathProgramCache]: Analyzing trace with hash -453073198, now seen corresponding path program 1 times [2022-11-23 01:56:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:56:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638197780] [2022-11-23 01:56:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:14,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:56:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:16,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:56:16,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638197780] [2022-11-23 01:56:16,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638197780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:56:16,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325827871] [2022-11-23 01:56:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:16,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:56:16,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:56:16,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:56:16,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93224ce0-3cc4-43a2-a5b6-902b7075f67a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 01:56:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-23 01:56:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:56:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 211 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:18,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:56:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:20,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325827871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:56:20,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:56:20,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-11-23 01:56:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247262811] [2022-11-23 01:56:20,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:56:20,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-23 01:56:20,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:56:20,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-23 01:56:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=5699, Unknown=0, NotChecked=0, Total=6806 [2022-11-23 01:56:23,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 199 [2022-11-23 01:56:23,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 5914 transitions, 35639 flow. Second operand has 83 states, 83 states have (on average 85.19277108433735) internal successors, (7071), 83 states have internal predecessors, (7071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:23,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:56:23,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 199 [2022-11-23 01:56:23,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand