./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8 --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 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 --- 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-2329fc7 [2022-12-13 15:27:47,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:27:47,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:27:47,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:27:47,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:27:47,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:27:47,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:27:47,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:27:47,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:27:47,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:27:47,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:27:47,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:27:47,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:27:47,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:27:47,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:27:47,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:27:47,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:27:47,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:27:47,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:27:47,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:27:47,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:27:47,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:27:47,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:27:47,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:27:47,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:27:47,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:27:47,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:27:47,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:27:47,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:27:47,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:27:47,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:27:47,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:27:47,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:27:47,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:27:47,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:27:47,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:27:47,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:27:47,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:27:47,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:27:47,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:27:47,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:27:47,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:27:47,747 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:27:47,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:27:47,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:27:47,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:27:47,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:27:47,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:27:47,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:27:47,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:27:47,749 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:27:47,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:27:47,749 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:27:47,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:27:47,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:27:47,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:27:47,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:27:47,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:27:47,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:27:47,750 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:27:47,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:27:47,750 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:27:47,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:27:47,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:27:47,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:27:47,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:27:47,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:27:47,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:27:47,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:27:47,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:27:47,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:27:47,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:27:47,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:27:47,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:27:47,752 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:27:47,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:27:47,752 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:27:47,752 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 [2022-12-13 15:27:47,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:27:47,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:27:47,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:27:47,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:27:47,935 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:27:47,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/fib_safe-10.i [2022-12-13 15:27:50,565 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:27:50,755 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:27:50,756 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/sv-benchmarks/c/pthread/fib_safe-10.i [2022-12-13 15:27:50,768 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/data/b5ae2ff5f/9c99f57fd96648088564284def238a0c/FLAGaf5257cf2 [2022-12-13 15:27:50,780 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/data/b5ae2ff5f/9c99f57fd96648088564284def238a0c [2022-12-13 15:27:50,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:27:50,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:27:50,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:27:50,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:27:50,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:27:50,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:27:50" (1/1) ... [2022-12-13 15:27:50,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6565665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:50, skipping insertion in model container [2022-12-13 15:27:50,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:27:50" (1/1) ... [2022-12-13 15:27:50,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:27:50,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:27:51,061 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/sv-benchmarks/c/pthread/fib_safe-10.i[30241,30254] [2022-12-13 15:27:51,068 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,069 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,071 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,072 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,079 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,080 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:27:51,088 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:27:51,120 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/sv-benchmarks/c/pthread/fib_safe-10.i[30241,30254] [2022-12-13 15:27:51,121 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,121 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,122 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,123 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,125 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,128 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:27:51,128 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:27:51,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:27:51,152 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:27:51,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51 WrapperNode [2022-12-13 15:27:51,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:27:51,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:27:51,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:27:51,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:27:51,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,190 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 15:27:51,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:27:51,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:27:51,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:27:51,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:27:51,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:27:51,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:27:51,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:27:51,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:27:51,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (1/1) ... [2022-12-13 15:27:51,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:27:51,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:27:51,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:27:51,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:27:51,270 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 15:27:51,270 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 15:27:51,270 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 15:27:51,270 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 15:27:51,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:27:51,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:27:51,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:27:51,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:27:51,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:27:51,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:27:51,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:27:51,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:27:51,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:27:51,273 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 15:27:51,382 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:27:51,385 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:27:51,538 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:27:51,545 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:27:51,545 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 15:27:51,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:27:51 BoogieIcfgContainer [2022-12-13 15:27:51,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:27:51,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:27:51,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:27:51,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:27:51,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:27:50" (1/3) ... [2022-12-13 15:27:51,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131891cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:27:51, skipping insertion in model container [2022-12-13 15:27:51,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:27:51" (2/3) ... [2022-12-13 15:27:51,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131891cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:27:51, skipping insertion in model container [2022-12-13 15:27:51,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:27:51" (3/3) ... [2022-12-13 15:27:51,557 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2022-12-13 15:27:51,565 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:27:51,574 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:27:51,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:27:51,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:27:51,634 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:27:51,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 15:27:51,722 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 15:27:51,722 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:27:51,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-12-13 15:27:51,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 15:27:51,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-12-13 15:27:51,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:27:51,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 15:27:51,750 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 15:27:51,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 204 flow [2022-12-13 15:27:51,777 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 15:27:51,778 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:27:51,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-12-13 15:27:51,781 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2022-12-13 15:27:53,929 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2022-12-13 15:27:53,929 INFO L136 LiptonReduction]: Total number of compositions: 97 [2022-12-13 15:27:53,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:27:53,944 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;@1a6cb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:27:53,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 15:27:53,947 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-12-13 15:27:53,947 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:27:53,947 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:27:53,947 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:27:53,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:27:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:27:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1641818498, now seen corresponding path program 1 times [2022-12-13 15:27:53,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:27:53,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116629023] [2022-12-13 15:27:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:27:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:27:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:27:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:54,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:27:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116629023] [2022-12-13 15:27:54,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116629023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:27:54,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:27:54,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:27:54,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419238660] [2022-12-13 15:27:54,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:27:54,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:27:54,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:27:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:27:54,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:27:54,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 198 [2022-12-13 15:27:54,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:54,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:27:54,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 198 [2022-12-13 15:27:54,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:27:54,211 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-13 15:27:54,211 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:27:54,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 331 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2022-12-13 15:27:54,212 INFO L137 encePairwiseOnDemand]: 194/198 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-12-13 15:27:54,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-12-13 15:27:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:27:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:27:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2022-12-13 15:27:54,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49326599326599324 [2022-12-13 15:27:54,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2022-12-13 15:27:54,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2022-12-13 15:27:54,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:27:54,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2022-12-13 15:27:54,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:54,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2022-12-13 15:27:54,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2022-12-13 15:27:54,234 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 293 transitions. [2022-12-13 15:27:54,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-12-13 15:27:54,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:27:54,237 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-12-13 15:27:54,239 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-12-13 15:27:54,241 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-12-13 15:27:54,242 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-12-13 15:27:54,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:54,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:27:54,242 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:27:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:27:54,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:27:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:27:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash 643234342, now seen corresponding path program 1 times [2022-12-13 15:27:54,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:27:54,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273347775] [2022-12-13 15:27:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:27:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:27:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:27:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:54,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:27:54,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273347775] [2022-12-13 15:27:54,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273347775] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:27:54,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3890815] [2022-12-13 15:27:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:27:54,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:27:54,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:27:54,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:27:54,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:27:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:27:54,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:27:54,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:27:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:54,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:27:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:54,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3890815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:27:54,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:27:54,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 15:27:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867820297] [2022-12-13 15:27:54,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:27:54,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:27:54,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:27:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:27:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:27:54,447 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 15:27:54,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:54,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:27:54,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 15:27:54,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:27:54,533 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-13 15:27:54,533 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 15:27:54,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 452 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2022-12-13 15:27:54,535 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-13 15:27:54,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-12-13 15:27:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:27:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:27:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-12-13 15:27:54,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48653198653198654 [2022-12-13 15:27:54,539 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-12-13 15:27:54,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-12-13 15:27:54,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:27:54,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-12-13 15:27:54,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:54,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 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) [2022-12-13 15:27:54,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 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) [2022-12-13 15:27:54,547 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 578 transitions. [2022-12-13 15:27:54,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-12-13 15:27:54,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:27:54,549 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-12-13 15:27:54,549 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2022-12-13 15:27:54,549 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-12-13 15:27:54,550 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-12-13 15:27:54,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:54,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:27:54,550 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 15:27:54,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:27:54,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:27:54,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:27:54,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:27:54,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1549565826, now seen corresponding path program 2 times [2022-12-13 15:27:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:27:54,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464372390] [2022-12-13 15:27:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:27:54,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:27:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:27:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:54,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:27:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464372390] [2022-12-13 15:27:54,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464372390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:27:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612642398] [2022-12-13 15:27:54,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:27:54,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:27:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:27:54,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:27:54,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:27:55,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:27:55,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:27:55,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:27:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:27:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:55,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:27:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:55,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612642398] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:27:55,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:27:55,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 15:27:55,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670283685] [2022-12-13 15:27:55,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:27:55,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:27:55,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:27:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:27:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:27:55,085 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 15:27:55,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:55,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:27:55,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 15:27:55,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:27:55,230 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-13 15:27:55,231 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-12-13 15:27:55,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 846 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2022-12-13 15:27:55,235 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-13 15:27:55,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-12-13 15:27:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:27:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:27:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1157 transitions. [2022-12-13 15:27:55,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48695286195286197 [2022-12-13 15:27:55,241 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1157 transitions. [2022-12-13 15:27:55,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1157 transitions. [2022-12-13 15:27:55,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:27:55,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1157 transitions. [2022-12-13 15:27:55,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:55,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 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) [2022-12-13 15:27:55,252 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 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) [2022-12-13 15:27:55,252 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1157 transitions. [2022-12-13 15:27:55,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-12-13 15:27:55,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 15:27:55,256 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-12-13 15:27:55,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2022-12-13 15:27:55,257 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-12-13 15:27:55,257 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-12-13 15:27:55,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:55,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:27:55,258 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 15:27:55,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:27:55,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:27:55,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:27:55,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:27:55,460 INFO L85 PathProgramCache]: Analyzing trace with hash -698507394, now seen corresponding path program 3 times [2022-12-13 15:27:55,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:27:55,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509767706] [2022-12-13 15:27:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:27:55,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:27:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:27:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:55,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:27:55,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509767706] [2022-12-13 15:27:55,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509767706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:27:55,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212571081] [2022-12-13 15:27:55,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:27:55,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:27:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:27:55,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:27:55,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:27:55,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 15:27:55,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:27:55,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 15:27:55,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:27:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:55,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:27:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:55,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212571081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:27:55,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:27:55,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 15:27:55,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922354843] [2022-12-13 15:27:55,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:27:55,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:27:55,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:27:55,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:27:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:27:55,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 15:27:55,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:55,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:27:55,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 15:27:55,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:27:56,226 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-12-13 15:27:56,227 INFO L131 PetriNetUnfolder]: For 4212/4212 co-relation queries the response was YES. [2022-12-13 15:27:56,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4212/4212 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1646 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2022-12-13 15:27:56,230 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-12-13 15:27:56,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2022-12-13 15:27:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:27:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:27:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2315 transitions. [2022-12-13 15:27:56,241 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4871632996632997 [2022-12-13 15:27:56,241 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2315 transitions. [2022-12-13 15:27:56,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2315 transitions. [2022-12-13 15:27:56,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:27:56,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2315 transitions. [2022-12-13 15:27:56,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.45833333333333) internal successors, (2315), 24 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:56,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 198.0) internal successors, (4950), 25 states have internal predecessors, (4950), 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) [2022-12-13 15:27:56,250 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 198.0) internal successors, (4950), 25 states have internal predecessors, (4950), 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) [2022-12-13 15:27:56,250 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2315 transitions. [2022-12-13 15:27:56,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2022-12-13 15:27:56,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-12-13 15:27:56,255 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2022-12-13 15:27:56,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2022-12-13 15:27:56,256 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2022-12-13 15:27:56,256 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2022-12-13 15:27:56,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:27:56,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:27:56,256 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 15:27:56,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 15:27:56,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:27:56,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:27:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:27:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1078467966, now seen corresponding path program 4 times [2022-12-13 15:27:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:27:56,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271214200] [2022-12-13 15:27:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:27:56,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:27:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:27:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:57,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:27:57,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271214200] [2022-12-13 15:27:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271214200] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:27:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058813114] [2022-12-13 15:27:57,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:27:57,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:27:57,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:27:57,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:27:57,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:27:57,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:27:57,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:27:57,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-13 15:27:57,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:27:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:58,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:27:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:27:59,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058813114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:27:59,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:27:59,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2022-12-13 15:27:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104873204] [2022-12-13 15:27:59,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:27:59,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 15:27:59,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:27:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 15:27:59,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=4066, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 15:28:01,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 15:28:01,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 71 states, 71 states have (on average 85.1830985915493) internal successors, (6048), 71 states have internal predecessors, (6048), 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) [2022-12-13 15:28:01,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:28:01,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 15:28:01,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:28:46,912 INFO L130 PetriNetUnfolder]: 68931/103414 cut-off events. [2022-12-13 15:28:46,913 INFO L131 PetriNetUnfolder]: For 594814/594814 co-relation queries the response was YES. [2022-12-13 15:28:47,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362188 conditions, 103414 events. 68931/103414 cut-off events. For 594814/594814 co-relation queries the response was YES. Maximal size of possible extension queue 2146. Compared 756034 event pairs, 97 based on Foata normal form. 193/77777 useless extension candidates. Maximal degree in co-relation 362154. Up to 26911 conditions per place. [2022-12-13 15:28:47,636 INFO L137 encePairwiseOnDemand]: 193/198 looper letters, 1504 selfloop transitions, 4625 changer transitions 0/6129 dead transitions. [2022-12-13 15:28:47,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 6129 transitions, 63083 flow [2022-12-13 15:28:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2022-12-13 15:28:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2022-12-13 15:28:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 27689 transitions. [2022-12-13 15:28:47,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46459612738682504 [2022-12-13 15:28:47,662 INFO L72 ComplementDD]: Start complementDD. Operand 301 states and 27689 transitions. [2022-12-13 15:28:47,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 301 states and 27689 transitions. [2022-12-13 15:28:47,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:28:47,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 301 states and 27689 transitions. [2022-12-13 15:28:47,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 302 states, 301 states have (on average 91.99003322259136) internal successors, (27689), 301 states have internal predecessors, (27689), 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) [2022-12-13 15:28:47,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 302 states, 302 states have (on average 198.0) internal successors, (59796), 302 states have internal predecessors, (59796), 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) [2022-12-13 15:28:47,756 INFO L81 ComplementDD]: Finished complementDD. Result has 302 states, 302 states have (on average 198.0) internal successors, (59796), 302 states have internal predecessors, (59796), 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) [2022-12-13 15:28:47,756 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 301 states and 27689 transitions. [2022-12-13 15:28:47,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 6129 transitions, 63083 flow [2022-12-13 15:28:53,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 6129 transitions, 43625 flow, removed 8787 selfloop flow, removed 11 redundant places. [2022-12-13 15:28:53,182 INFO L231 Difference]: Finished difference. Result has 386 places, 4660 transitions, 28100 flow [2022-12-13 15:28:53,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=301, PETRI_FLOW=28100, PETRI_PLACES=386, PETRI_TRANSITIONS=4660} [2022-12-13 15:28:53,183 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 368 predicate places. [2022-12-13 15:28:53,183 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 4660 transitions, 28100 flow [2022-12-13 15:28:53,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 85.1830985915493) internal successors, (6048), 71 states have internal predecessors, (6048), 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) [2022-12-13 15:28:53,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:28:53,185 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:28:53,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 15:28:53,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:28:53,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:28:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:28:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1647899346, now seen corresponding path program 1 times [2022-12-13 15:28:53,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:28:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035697722] [2022-12-13 15:28:53,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:28:53,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:28:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:28:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:28:54,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:28:54,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035697722] [2022-12-13 15:28:54,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035697722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:28:54,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149553332] [2022-12-13 15:28:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:28:54,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:28:54,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:28:54,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:28:54,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_423e6e84-0a37-4739-8945-d3ef45451d98/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:28:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:28:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-13 15:28:54,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:28:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 172 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:28:55,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:28:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:28:57,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149553332] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:28:57,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:28:57,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-13 15:28:57,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025018558] [2022-12-13 15:28:57,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:28:57,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 15:28:57,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:28:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 15:28:57,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=4900, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 15:28:58,655 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 15:28:58,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 4660 transitions, 28100 flow. Second operand has 77 states, 77 states have (on average 85.20779220779221) internal successors, (6561), 77 states have internal predecessors, (6561), 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) [2022-12-13 15:28:58,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:28:58,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 15:28:58,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand