./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 e04fb08f 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_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8 --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-e04fb08 [2022-11-16 12:26:43,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:26:43,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:26:43,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:26:43,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:26:43,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:26:43,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:26:43,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:26:43,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:26:43,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:26:43,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:26:43,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:26:43,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:26:43,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:26:43,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:26:43,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:26:43,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:26:43,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:26:43,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:26:43,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:26:43,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:26:43,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:26:43,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:26:43,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:26:43,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:26:43,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:26:43,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:26:43,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:26:43,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:26:43,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:26:43,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:26:43,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:26:43,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:26:43,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:26:43,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:26:43,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:26:43,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:26:43,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:26:43,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:26:43,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:26:43,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:26:43,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:26:43,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:26:43,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:26:43,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:26:43,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:26:43,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:26:43,739 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:26:43,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:26:43,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:26:43,740 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:26:43,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:26:43,741 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:26:43,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:26:43,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:26:43,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:26:43,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:26:43,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:26:43,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:26:43,743 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:26:43,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:26:43,743 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:26:43,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:26:43,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:26:43,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:26:43,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:26:43,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:26:43,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:26:43,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:26:43,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:26:43,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:26:43,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:26:43,747 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:26:43,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:26:43,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:26:43,748 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 [2022-11-16 12:26:44,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:26:44,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:26:44,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:26:44,026 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:26:44,027 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:26:44,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread/fib_safe-11.i [2022-11-16 12:26:44,106 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/data/12de900a4/0f6a91ee7b35422593693157f24e8527/FLAGdfc9c0ad8 [2022-11-16 12:26:44,651 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:26:44,657 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/sv-benchmarks/c/pthread/fib_safe-11.i [2022-11-16 12:26:44,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/data/12de900a4/0f6a91ee7b35422593693157f24e8527/FLAGdfc9c0ad8 [2022-11-16 12:26:44,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/data/12de900a4/0f6a91ee7b35422593693157f24e8527 [2022-11-16 12:26:44,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:26:44,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:26:44,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:26:44,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:26:44,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:26:44,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:26:44" (1/1) ... [2022-11-16 12:26:44,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a3cfa04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:44, skipping insertion in model container [2022-11-16 12:26:44,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:26:44" (1/1) ... [2022-11-16 12:26:44,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:26:45,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:26:45,393 WARN L229 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_87355503-7c81-4202-bcf4-6e22e45e3fbc/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-11-16 12:26:45,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:26:45,419 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:26:45,451 WARN L229 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_87355503-7c81-4202-bcf4-6e22e45e3fbc/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-11-16 12:26:45,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:26:45,507 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:26:45,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45 WrapperNode [2022-11-16 12:26:45,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:26:45,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:26:45,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:26:45,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:26:45,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,579 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-16 12:26:45,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:26:45,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:26:45,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:26:45,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:26:45,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,620 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:26:45,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:26:45,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:26:45,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:26:45,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (1/1) ... [2022-11-16 12:26:45,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:26:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:26:45,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:26:45,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:26:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-16 12:26:45,724 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-16 12:26:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-16 12:26:45,724 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-16 12:26:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:26:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:26:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:26:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:26:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:26:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:26:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:26:45,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:26:45,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:26:45,728 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:26:45,944 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:26:45,946 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:26:46,184 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:26:46,191 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:26:46,191 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 12:26:46,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:26:46 BoogieIcfgContainer [2022-11-16 12:26:46,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:26:46,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:26:46,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:26:46,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:26:46,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:26:44" (1/3) ... [2022-11-16 12:26:46,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3729064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:26:46, skipping insertion in model container [2022-11-16 12:26:46,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:26:45" (2/3) ... [2022-11-16 12:26:46,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3729064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:26:46, skipping insertion in model container [2022-11-16 12:26:46,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:26:46" (3/3) ... [2022-11-16 12:26:46,205 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2022-11-16 12:26:46,215 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:26:46,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:26:46,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:26:46,225 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:26:46,330 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:26:46,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-11-16 12:26:46,476 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-16 12:26:46,477 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:26:46,484 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 69 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. [2022-11-16 12:26:46,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-11-16 12:26:46,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-11-16 12:26:46,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:26:46,517 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;@4a7b4d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:26:46,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:26:46,551 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-16 12:26:46,551 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:26:46,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:26:46,552 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:46,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:26:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1370645073, now seen corresponding path program 1 times [2022-11-16 12:26:46,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:46,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139534424] [2022-11-16 12:26:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:46,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139534424] [2022-11-16 12:26:46,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139534424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:46,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:46,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:26:46,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68961449] [2022-11-16 12:26:46,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:46,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:26:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:46,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:26:46,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:26:46,864 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 101 [2022-11-16 12:26:46,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:46,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:26:46,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 101 [2022-11-16 12:26:46,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:26:46,901 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-16 12:26:46,901 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:26:46,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 94 events. 3/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 5/95 useless extension candidates. Maximal degree in co-relation 66. Up to 3 conditions per place. [2022-11-16 12:26:46,904 INFO L137 encePairwiseOnDemand]: 97/101 looper letters, 2 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2022-11-16 12:26:46,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 198 flow [2022-11-16 12:26:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:26:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:26:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2022-11-16 12:26:46,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9603960396039604 [2022-11-16 12:26:46,918 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 194 transitions. [2022-11-16 12:26:46,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 194 transitions. [2022-11-16 12:26:46,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:26:46,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 194 transitions. [2022-11-16 12:26:46,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:46,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:46,929 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:46,931 INFO L175 Difference]: Start difference. First operand has 99 places, 99 transitions, 204 flow. Second operand 2 states and 194 transitions. [2022-11-16 12:26:46,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 198 flow [2022-11-16 12:26:46,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:26:46,938 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 192 flow [2022-11-16 12:26:46,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2022-11-16 12:26:46,944 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -2 predicate places. [2022-11-16 12:26:46,944 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 192 flow [2022-11-16 12:26:46,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:46,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:26:46,946 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:46,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:26:46,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:26:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:46,948 INFO L85 PathProgramCache]: Analyzing trace with hash 865086448, now seen corresponding path program 1 times [2022-11-16 12:26:46,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:46,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467463588] [2022-11-16 12:26:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:46,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:47,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:47,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467463588] [2022-11-16 12:26:47,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467463588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:47,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:47,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:26:47,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443166664] [2022-11-16 12:26:47,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:47,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:47,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:47,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:47,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 101 [2022-11-16 12:26:47,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:47,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:26:47,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 101 [2022-11-16 12:26:47,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:26:47,244 INFO L130 PetriNetUnfolder]: 3/100 cut-off events. [2022-11-16 12:26:47,244 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:26:47,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 100 events. 3/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2022-11-16 12:26:47,249 INFO L137 encePairwiseOnDemand]: 98/101 looper letters, 9 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2022-11-16 12:26:47,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 97 transitions, 220 flow [2022-11-16 12:26:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:26:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2022-11-16 12:26:47,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9108910891089109 [2022-11-16 12:26:47,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2022-11-16 12:26:47,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2022-11-16 12:26:47,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:26:47,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2022-11-16 12:26:47,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:47,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:47,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:47,260 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 192 flow. Second operand 3 states and 276 transitions. [2022-11-16 12:26:47,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 97 transitions, 220 flow [2022-11-16 12:26:47,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:26:47,264 INFO L231 Difference]: Finished difference. Result has 100 places, 95 transitions, 204 flow [2022-11-16 12:26:47,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2022-11-16 12:26:47,265 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2022-11-16 12:26:47,265 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 204 flow [2022-11-16 12:26:47,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:47,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:26:47,266 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:47,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:26:47,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:26:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:47,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1310951925, now seen corresponding path program 1 times [2022-11-16 12:26:47,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:47,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861205316] [2022-11-16 12:26:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:47,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:47,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861205316] [2022-11-16 12:26:47,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861205316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:26:47,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924463301] [2022-11-16 12:26:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:47,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:47,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:26:47,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:26:47,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:26:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:47,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:26:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:47,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:47,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924463301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:47,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:26:47,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 12:26:47,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946557668] [2022-11-16 12:26:47,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:47,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:26:47,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:47,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:26:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:26:47,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-16 12:26:47,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 204 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:47,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:26:47,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-16 12:26:47,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:26:47,985 INFO L130 PetriNetUnfolder]: 3/109 cut-off events. [2022-11-16 12:26:47,985 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:26:47,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 109 events. 3/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2022-11-16 12:26:47,987 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 10 selfloop transitions, 9 changer transitions 0/103 dead transitions. [2022-11-16 12:26:47,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 260 flow [2022-11-16 12:26:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:26:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:26:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 795 transitions. [2022-11-16 12:26:47,993 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8745874587458746 [2022-11-16 12:26:47,993 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 795 transitions. [2022-11-16 12:26:47,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 795 transitions. [2022-11-16 12:26:47,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:26:47,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 795 transitions. [2022-11-16 12:26:47,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:48,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:48,003 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:48,003 INFO L175 Difference]: Start difference. First operand has 100 places, 95 transitions, 204 flow. Second operand 9 states and 795 transitions. [2022-11-16 12:26:48,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 260 flow [2022-11-16 12:26:48,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 103 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:26:48,009 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 252 flow [2022-11-16 12:26:48,009 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2022-11-16 12:26:48,012 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 11 predicate places. [2022-11-16 12:26:48,012 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 252 flow [2022-11-16 12:26:48,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:48,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:26:48,013 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:48,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:48,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-16 12:26:48,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:26:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1106224747, now seen corresponding path program 2 times [2022-11-16 12:26:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:48,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614290160] [2022-11-16 12:26:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:48,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:48,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614290160] [2022-11-16 12:26:48,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614290160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:26:48,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550622180] [2022-11-16 12:26:48,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:26:48,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:48,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:26:48,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:26:48,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:26:48,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:26:48,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:26:48,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:26:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:48,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:48,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550622180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:48,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:26:48,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 12:26:48,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068581167] [2022-11-16 12:26:48,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:48,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:26:48,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:26:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:26:48,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-16 12:26:48,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 252 flow. Second operand has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:48,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:26:48,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-16 12:26:48,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:26:49,170 INFO L130 PetriNetUnfolder]: 3/137 cut-off events. [2022-11-16 12:26:49,170 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 12:26:49,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 137 events. 3/137 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/138 useless extension candidates. Maximal degree in co-relation 229. Up to 11 conditions per place. [2022-11-16 12:26:49,173 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 14 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2022-11-16 12:26:49,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 418 flow [2022-11-16 12:26:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:26:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:26:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1845 transitions. [2022-11-16 12:26:49,178 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8698727015558698 [2022-11-16 12:26:49,178 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1845 transitions. [2022-11-16 12:26:49,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1845 transitions. [2022-11-16 12:26:49,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:26:49,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1845 transitions. [2022-11-16 12:26:49,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.85714285714286) internal successors, (1845), 21 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:49,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:49,190 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:49,190 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 252 flow. Second operand 21 states and 1845 transitions. [2022-11-16 12:26:49,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 418 flow [2022-11-16 12:26:49,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 404 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:26:49,196 INFO L231 Difference]: Finished difference. Result has 134 places, 114 transitions, 376 flow [2022-11-16 12:26:49,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=376, PETRI_PLACES=134, PETRI_TRANSITIONS=114} [2022-11-16 12:26:49,198 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 35 predicate places. [2022-11-16 12:26:49,198 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 114 transitions, 376 flow [2022-11-16 12:26:49,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:49,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:26:49,201 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:49,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:49,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:49,407 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:26:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:49,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1990750421, now seen corresponding path program 3 times [2022-11-16 12:26:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:49,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692392712] [2022-11-16 12:26:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:49,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:49,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:49,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692392712] [2022-11-16 12:26:49,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692392712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:26:49,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438399205] [2022-11-16 12:26:49,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:26:49,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:26:49,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:26:49,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:26:50,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 12:26:50,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:26:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:26:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:50,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:50,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438399205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:50,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:26:50,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 12:26:50,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416934490] [2022-11-16 12:26:50,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:50,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:26:50,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:50,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:26:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:26:50,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-16 12:26:50,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 114 transitions, 376 flow. Second operand has 34 states, 34 states have (on average 88.0) internal successors, (2992), 34 states have internal predecessors, (2992), 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) [2022-11-16 12:26:50,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:26:50,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-16 12:26:50,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:26:51,187 INFO L130 PetriNetUnfolder]: 3/193 cut-off events. [2022-11-16 12:26:51,187 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2022-11-16 12:26:51,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 193 events. 3/193 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 8/198 useless extension candidates. Maximal degree in co-relation 443. Up to 27 conditions per place. [2022-11-16 12:26:51,193 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 22 selfloop transitions, 45 changer transitions 0/151 dead transitions. [2022-11-16 12:26:51,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 151 transitions, 798 flow [2022-11-16 12:26:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 12:26:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-16 12:26:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3945 transitions. [2022-11-16 12:26:51,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8679867986798679 [2022-11-16 12:26:51,202 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3945 transitions. [2022-11-16 12:26:51,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3945 transitions. [2022-11-16 12:26:51,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:26:51,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3945 transitions. [2022-11-16 12:26:51,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 87.66666666666667) internal successors, (3945), 45 states have internal predecessors, (3945), 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) [2022-11-16 12:26:51,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 101.0) internal successors, (4646), 46 states have internal predecessors, (4646), 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) [2022-11-16 12:26:51,259 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 101.0) internal successors, (4646), 46 states have internal predecessors, (4646), 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) [2022-11-16 12:26:51,259 INFO L175 Difference]: Start difference. First operand has 134 places, 114 transitions, 376 flow. Second operand 45 states and 3945 transitions. [2022-11-16 12:26:51,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 151 transitions, 798 flow [2022-11-16 12:26:51,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 151 transitions, 758 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-16 12:26:51,268 INFO L231 Difference]: Finished difference. Result has 181 places, 139 transitions, 654 flow [2022-11-16 12:26:51,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=654, PETRI_PLACES=181, PETRI_TRANSITIONS=139} [2022-11-16 12:26:51,269 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 82 predicate places. [2022-11-16 12:26:51,269 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 139 transitions, 654 flow [2022-11-16 12:26:51,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 88.0) internal successors, (2992), 34 states have internal predecessors, (2992), 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) [2022-11-16 12:26:51,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:26:51,271 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:51,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:26:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:51,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:26:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash -522878805, now seen corresponding path program 4 times [2022-11-16 12:26:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:51,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120555424] [2022-11-16 12:26:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:51,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:52,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:52,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120555424] [2022-11-16 12:26:52,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120555424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:26:52,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123337915] [2022-11-16 12:26:52,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:26:52,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:52,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:26:52,627 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:26:52,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:26:52,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:26:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:26:52,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 12:26:52,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:53,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:53,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123337915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:53,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:26:53,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 51 [2022-11-16 12:26:53,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332278642] [2022-11-16 12:26:53,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:53,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 12:26:53,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:53,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 12:26:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 12:26:53,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-16 12:26:54,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 139 transitions, 654 flow. Second operand has 51 states, 51 states have (on average 88.03921568627452) internal successors, (4490), 51 states have internal predecessors, (4490), 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) [2022-11-16 12:26:54,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:26:54,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-16 12:26:54,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:26:55,487 INFO L130 PetriNetUnfolder]: 3/256 cut-off events. [2022-11-16 12:26:55,487 INFO L131 PetriNetUnfolder]: For 1354/1354 co-relation queries the response was YES. [2022-11-16 12:26:55,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 256 events. 3/256 cut-off events. For 1354/1354 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 9/262 useless extension candidates. Maximal degree in co-relation 748. Up to 44 conditions per place. [2022-11-16 12:26:55,490 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 31 selfloop transitions, 72 changer transitions 0/187 dead transitions. [2022-11-16 12:26:55,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 187 transitions, 1354 flow [2022-11-16 12:26:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 12:26:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-16 12:26:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 6304 transitions. [2022-11-16 12:26:55,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8668866886688669 [2022-11-16 12:26:55,501 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 6304 transitions. [2022-11-16 12:26:55,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 6304 transitions. [2022-11-16 12:26:55,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:26:55,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 6304 transitions. [2022-11-16 12:26:55,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 87.55555555555556) internal successors, (6304), 72 states have internal predecessors, (6304), 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) [2022-11-16 12:26:55,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 101.0) internal successors, (7373), 73 states have internal predecessors, (7373), 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) [2022-11-16 12:26:55,562 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 101.0) internal successors, (7373), 73 states have internal predecessors, (7373), 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) [2022-11-16 12:26:55,562 INFO L175 Difference]: Start difference. First operand has 181 places, 139 transitions, 654 flow. Second operand 72 states and 6304 transitions. [2022-11-16 12:26:55,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 187 transitions, 1354 flow [2022-11-16 12:26:55,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 187 transitions, 1280 flow, removed 19 selfloop flow, removed 18 redundant places. [2022-11-16 12:26:55,572 INFO L231 Difference]: Finished difference. Result has 244 places, 167 transitions, 1036 flow [2022-11-16 12:26:55,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=1036, PETRI_PLACES=244, PETRI_TRANSITIONS=167} [2022-11-16 12:26:55,575 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 145 predicate places. [2022-11-16 12:26:55,575 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 167 transitions, 1036 flow [2022-11-16 12:26:55,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 88.03921568627452) internal successors, (4490), 51 states have internal predecessors, (4490), 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) [2022-11-16 12:26:55,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:26:55,592 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:55,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:55,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 12:26:55,793 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:26:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1932937072, now seen corresponding path program 5 times [2022-11-16 12:26:55,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:55,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402691095] [2022-11-16 12:26:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:55,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402691095] [2022-11-16 12:27:02,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402691095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:27:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135617807] [2022-11-16 12:27:02,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:27:02,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:27:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:27:02,431 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:27:02,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87355503-7c81-4202-bcf4-6e22e45e3fbc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:27:02,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-11-16 12:27:02,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:27:02,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-16 12:27:02,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 1661 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:13,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:27:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:27:27,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135617807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:27:27,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:27:27,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 235 [2022-11-16 12:27:27,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002902255] [2022-11-16 12:27:27,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:27:27,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-11-16 12:27:27,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:27,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-11-16 12:27:27,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3171, Invalid=51819, Unknown=0, NotChecked=0, Total=54990 [2022-11-16 12:27:27,401 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 101 [2022-11-16 12:27:27,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 167 transitions, 1036 flow. Second operand has 235 states, 235 states have (on average 70.15744680851064) internal successors, (16487), 235 states have internal predecessors, (16487), 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) [2022-11-16 12:27:27,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:27:27,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 101 [2022-11-16 12:27:27,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand