./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c --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_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/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_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/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_ceaf2136-80d3-4f54-9f81-43cf7a24f447/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 ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 --- 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 16:09:31,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:09:31,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:09:31,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:09:31,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:09:31,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:09:31,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:09:31,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:09:31,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:09:31,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:09:31,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:09:31,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:09:31,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:09:31,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:09:31,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:09:31,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:09:31,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:09:31,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:09:31,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:09:31,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:09:31,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:09:31,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:09:31,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:09:31,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:09:31,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:09:31,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:09:31,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:09:31,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:09:31,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:09:31,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:09:31,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:09:31,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:09:31,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:09:31,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:09:31,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:09:31,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:09:31,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:09:31,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:09:31,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:09:31,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:09:31,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:09:31,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:09:31,581 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:09:31,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:09:31,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:09:31,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:09:31,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:09:31,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:09:31,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:09:31,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:09:31,584 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:09:31,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:09:31,585 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:09:31,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:09:31,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:09:31,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:09:31,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:09:31,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:09:31,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:09:31,587 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:09:31,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:09:31,587 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:09:31,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:09:31,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:09:31,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:09:31,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:09:31,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:09:31,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:09:31,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:09:31,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:09:31,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:09:31,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:09:31,589 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:09:31,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:09:31,589 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:09:31,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:09:31,589 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:09:31,589 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_ceaf2136-80d3-4f54-9f81-43cf7a24f447/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 [2022-12-13 16:09:31,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:09:31,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:09:31,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:09:31,773 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:09:31,773 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:09:31,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-12-13 16:09:34,269 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:09:34,415 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:09:34,416 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-12-13 16:09:34,420 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/data/4d2cadf92/bceb722647b14580a2e80b962549df13/FLAG75c70d89c [2022-12-13 16:09:34,841 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/data/4d2cadf92/bceb722647b14580a2e80b962549df13 [2022-12-13 16:09:34,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:09:34,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:09:34,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:09:34,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:09:34,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:09:34,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:09:34" (1/1) ... [2022-12-13 16:09:34,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@785c5cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:34, skipping insertion in model container [2022-12-13 16:09:34,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:09:34" (1/1) ... [2022-12-13 16:09:34,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:09:34,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:09:34,983 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_ceaf2136-80d3-4f54-9f81-43cf7a24f447/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c[2237,2250] [2022-12-13 16:09:34,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:09:34,996 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:09:35,016 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_ceaf2136-80d3-4f54-9f81-43cf7a24f447/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c[2237,2250] [2022-12-13 16:09:35,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:09:35,028 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:09:35,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35 WrapperNode [2022-12-13 16:09:35,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:09:35,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:09:35,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:09:35,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:09:35,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,056 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-12-13 16:09:35,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:09:35,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:09:35,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:09:35,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:09:35,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,076 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:09:35,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:09:35,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:09:35,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:09:35,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (1/1) ... [2022-12-13 16:09:35,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:09:35,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:09:35,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:09:35,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:09:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:09:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:09:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:09:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:09:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:09:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 16:09:35,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 16:09:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 16:09:35,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 16:09:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:09:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:09:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:09:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:09:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:09:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:09:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:09:35,133 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 16:09:35,211 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:09:35,212 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:09:35,376 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:09:35,381 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:09:35,382 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 16:09:35,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:09:35 BoogieIcfgContainer [2022-12-13 16:09:35,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:09:35,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:09:35,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:09:35,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:09:35,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:09:34" (1/3) ... [2022-12-13 16:09:35,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe6d30f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:09:35, skipping insertion in model container [2022-12-13 16:09:35,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:35" (2/3) ... [2022-12-13 16:09:35,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe6d30f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:09:35, skipping insertion in model container [2022-12-13 16:09:35,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:09:35" (3/3) ... [2022-12-13 16:09:35,389 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2022-12-13 16:09:35,395 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:09:35,402 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:09:35,402 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:09:35,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:09:35,461 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 16:09:35,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 125 transitions, 282 flow [2022-12-13 16:09:35,533 INFO L130 PetriNetUnfolder]: 10/121 cut-off events. [2022-12-13 16:09:35,533 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 16:09:35,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 121 events. 10/121 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2022-12-13 16:09:35,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 125 transitions, 282 flow [2022-12-13 16:09:35,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 108 transitions, 240 flow [2022-12-13 16:09:35,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:09:35,551 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 108 transitions, 240 flow [2022-12-13 16:09:35,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 108 transitions, 240 flow [2022-12-13 16:09:35,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 108 transitions, 240 flow [2022-12-13 16:09:35,593 INFO L130 PetriNetUnfolder]: 10/108 cut-off events. [2022-12-13 16:09:35,594 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 16:09:35,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 108 events. 10/108 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2022-12-13 16:09:35,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2022-12-13 16:09:38,755 INFO L134 LiptonReduction]: Checked pairs total: 1522 [2022-12-13 16:09:38,755 INFO L136 LiptonReduction]: Total number of compositions: 99 [2022-12-13 16:09:38,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:09:38,776 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;@4ff9a930, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:09:38,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 16:09:38,783 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2022-12-13 16:09:38,783 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 16:09:38,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:38,784 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] [2022-12-13 16:09:38,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2080266702, now seen corresponding path program 1 times [2022-12-13 16:09:38,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:38,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990405858] [2022-12-13 16:09:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:38,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:39,361 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 16:09:39,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:39,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990405858] [2022-12-13 16:09:39,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990405858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:39,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:39,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:09:39,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975481067] [2022-12-13 16:09:39,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:39,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:09:39,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:09:39,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:39,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2022-12-13 16:09:39,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 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 16:09:39,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:39,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2022-12-13 16:09:39,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:39,595 INFO L130 PetriNetUnfolder]: 497/677 cut-off events. [2022-12-13 16:09:39,595 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-13 16:09:39,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 677 events. 497/677 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1777 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1016. Up to 471 conditions per place. [2022-12-13 16:09:39,599 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 41 selfloop transitions, 5 changer transitions 1/47 dead transitions. [2022-12-13 16:09:39,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 233 flow [2022-12-13 16:09:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:09:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:09:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2022-12-13 16:09:39,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2022-12-13 16:09:39,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2022-12-13 16:09:39,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2022-12-13 16:09:39,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:39,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2022-12-13 16:09:39,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 16:09:39,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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 16:09:39,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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 16:09:39,620 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 342 transitions. [2022-12-13 16:09:39,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 233 flow [2022-12-13 16:09:39,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 16:09:39,624 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 91 flow [2022-12-13 16:09:39,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2022-12-13 16:09:39,628 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2022-12-13 16:09:39,628 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 91 flow [2022-12-13 16:09:39,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 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 16:09:39,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:39,629 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:09:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:09:39,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1977049445, now seen corresponding path program 1 times [2022-12-13 16:09:39,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:39,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329101375] [2022-12-13 16:09:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:39,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:39,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329101375] [2022-12-13 16:09:39,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329101375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:39,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:39,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756380648] [2022-12-13 16:09:39,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:39,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:09:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:39,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:09:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:09:39,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2022-12-13 16:09:39,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:39,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:39,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2022-12-13 16:09:39,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:40,008 INFO L130 PetriNetUnfolder]: 693/951 cut-off events. [2022-12-13 16:09:40,009 INFO L131 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2022-12-13 16:09:40,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2416 conditions, 951 events. 693/951 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2812 event pairs, 67 based on Foata normal form. 32/983 useless extension candidates. Maximal degree in co-relation 766. Up to 371 conditions per place. [2022-12-13 16:09:40,012 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 68 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2022-12-13 16:09:40,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 78 transitions, 387 flow [2022-12-13 16:09:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2022-12-13 16:09:40,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5017857142857143 [2022-12-13 16:09:40,015 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2022-12-13 16:09:40,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2022-12-13 16:09:40,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:40,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2022-12-13 16:09:40,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 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 16:09:40,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:40,019 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:40,019 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 91 flow. Second operand 5 states and 562 transitions. [2022-12-13 16:09:40,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 78 transitions, 387 flow [2022-12-13 16:09:40,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 78 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:09:40,020 INFO L231 Difference]: Finished difference. Result has 34 places, 36 transitions, 151 flow [2022-12-13 16:09:40,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=34, PETRI_TRANSITIONS=36} [2022-12-13 16:09:40,021 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2022-12-13 16:09:40,021 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 36 transitions, 151 flow [2022-12-13 16:09:40,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:40,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:40,021 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] [2022-12-13 16:09:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:09:40,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:40,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2061911125, now seen corresponding path program 1 times [2022-12-13 16:09:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:40,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229551976] [2022-12-13 16:09:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:40,136 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 16:09:40,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:40,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229551976] [2022-12-13 16:09:40,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229551976] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:09:40,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813911558] [2022-12-13 16:09:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:40,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:09:40,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:09:40,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:09:40,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:09:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 16:09:40,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:09:40,486 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 16:09:40,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:09:40,530 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 16:09:40,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813911558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:09:40,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:09:40,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 16:09:40,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256201669] [2022-12-13 16:09:40,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:09:40,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:09:40,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:40,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:09:40,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:09:40,639 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2022-12-13 16:09:40,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 151 flow. Second operand has 6 states, 6 states have (on average 102.83333333333333) internal successors, (617), 6 states have internal predecessors, (617), 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 16:09:40,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:40,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2022-12-13 16:09:40,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:41,054 INFO L130 PetriNetUnfolder]: 1309/1809 cut-off events. [2022-12-13 16:09:41,054 INFO L131 PetriNetUnfolder]: For 1975/1975 co-relation queries the response was YES. [2022-12-13 16:09:41,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 1809 events. 1309/1809 cut-off events. For 1975/1975 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6333 event pairs, 291 based on Foata normal form. 68/1877 useless extension candidates. Maximal degree in co-relation 2898. Up to 757 conditions per place. [2022-12-13 16:09:41,062 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 98 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2022-12-13 16:09:41,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 106 transitions, 641 flow [2022-12-13 16:09:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 572 transitions. [2022-12-13 16:09:41,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2022-12-13 16:09:41,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 572 transitions. [2022-12-13 16:09:41,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 572 transitions. [2022-12-13 16:09:41,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:41,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 572 transitions. [2022-12-13 16:09:41,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 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 16:09:41,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:41,067 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:41,067 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 151 flow. Second operand 5 states and 572 transitions. [2022-12-13 16:09:41,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 106 transitions, 641 flow [2022-12-13 16:09:41,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 106 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:09:41,070 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 206 flow [2022-12-13 16:09:41,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2022-12-13 16:09:41,071 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2022-12-13 16:09:41,071 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 206 flow [2022-12-13 16:09:41,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 102.83333333333333) internal successors, (617), 6 states have internal predecessors, (617), 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 16:09:41,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:41,072 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] [2022-12-13 16:09:41,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:09:41,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:09:41,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1441525701, now seen corresponding path program 1 times [2022-12-13 16:09:41,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:41,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379907593] [2022-12-13 16:09:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:41,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:41,438 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 16:09:41,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379907593] [2022-12-13 16:09:41,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379907593] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:09:41,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159629296] [2022-12-13 16:09:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:41,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:09:41,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:09:41,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:09:41,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:09:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 16:09:41,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:09:41,602 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 16:09:41,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:09:41,652 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 16:09:41,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159629296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:09:41,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:09:41,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 16:09:41,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615574244] [2022-12-13 16:09:41,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:09:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:09:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:09:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:09:41,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2022-12-13 16:09:41,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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 16:09:41,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:41,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2022-12-13 16:09:41,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:42,055 INFO L130 PetriNetUnfolder]: 1735/2421 cut-off events. [2022-12-13 16:09:42,055 INFO L131 PetriNetUnfolder]: For 3838/3838 co-relation queries the response was YES. [2022-12-13 16:09:42,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8950 conditions, 2421 events. 1735/2421 cut-off events. For 3838/3838 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9189 event pairs, 383 based on Foata normal form. 90/2511 useless extension candidates. Maximal degree in co-relation 4319. Up to 1015 conditions per place. [2022-12-13 16:09:42,065 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 88 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2022-12-13 16:09:42,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 98 transitions, 660 flow [2022-12-13 16:09:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2022-12-13 16:09:42,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2022-12-13 16:09:42,067 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2022-12-13 16:09:42,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2022-12-13 16:09:42,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:42,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2022-12-13 16:09:42,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 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 16:09:42,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:42,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:42,070 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 206 flow. Second operand 5 states and 564 transitions. [2022-12-13 16:09:42,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 98 transitions, 660 flow [2022-12-13 16:09:42,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 98 transitions, 660 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:09:42,073 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 262 flow [2022-12-13 16:09:42,074 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-12-13 16:09:42,074 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2022-12-13 16:09:42,074 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 262 flow [2022-12-13 16:09:42,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 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 16:09:42,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:42,075 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] [2022-12-13 16:09:42,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:09:42,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:09:42,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash 388636193, now seen corresponding path program 2 times [2022-12-13 16:09:42,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:42,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151463048] [2022-12-13 16:09:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:42,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:42,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151463048] [2022-12-13 16:09:42,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151463048] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:42,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:42,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:42,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202589349] [2022-12-13 16:09:42,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:42,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:09:42,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:09:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:09:42,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2022-12-13 16:09:42,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:42,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:42,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2022-12-13 16:09:42,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:42,702 INFO L130 PetriNetUnfolder]: 1465/2017 cut-off events. [2022-12-13 16:09:42,703 INFO L131 PetriNetUnfolder]: For 5303/5303 co-relation queries the response was YES. [2022-12-13 16:09:42,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8243 conditions, 2017 events. 1465/2017 cut-off events. For 5303/5303 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7467 event pairs, 133 based on Foata normal form. 34/2051 useless extension candidates. Maximal degree in co-relation 5626. Up to 844 conditions per place. [2022-12-13 16:09:42,713 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 106 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2022-12-13 16:09:42,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 117 transitions, 907 flow [2022-12-13 16:09:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 566 transitions. [2022-12-13 16:09:42,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5053571428571428 [2022-12-13 16:09:42,715 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 566 transitions. [2022-12-13 16:09:42,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 566 transitions. [2022-12-13 16:09:42,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:42,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 566 transitions. [2022-12-13 16:09:42,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 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 16:09:42,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:42,720 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:42,720 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 262 flow. Second operand 5 states and 566 transitions. [2022-12-13 16:09:42,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 117 transitions, 907 flow [2022-12-13 16:09:42,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 117 transitions, 878 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 16:09:42,735 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 312 flow [2022-12-13 16:09:42,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2022-12-13 16:09:42,736 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2022-12-13 16:09:42,736 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 312 flow [2022-12-13 16:09:42,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:42,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:42,737 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] [2022-12-13 16:09:42,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:09:42,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:42,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1572683083, now seen corresponding path program 1 times [2022-12-13 16:09:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:42,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497937369] [2022-12-13 16:09:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:42,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:42,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:42,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497937369] [2022-12-13 16:09:42,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497937369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:42,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:42,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468089511] [2022-12-13 16:09:42,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:42,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:09:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:09:42,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:09:42,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2022-12-13 16:09:42,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:42,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:42,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2022-12-13 16:09:42,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:43,163 INFO L130 PetriNetUnfolder]: 1407/1959 cut-off events. [2022-12-13 16:09:43,163 INFO L131 PetriNetUnfolder]: For 6053/6053 co-relation queries the response was YES. [2022-12-13 16:09:43,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8447 conditions, 1959 events. 1407/1959 cut-off events. For 6053/6053 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7501 event pairs, 127 based on Foata normal form. 58/2017 useless extension candidates. Maximal degree in co-relation 5828. Up to 819 conditions per place. [2022-12-13 16:09:43,176 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 105 selfloop transitions, 8 changer transitions 2/115 dead transitions. [2022-12-13 16:09:43,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 115 transitions, 891 flow [2022-12-13 16:09:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 565 transitions. [2022-12-13 16:09:43,178 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5044642857142857 [2022-12-13 16:09:43,178 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 565 transitions. [2022-12-13 16:09:43,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 565 transitions. [2022-12-13 16:09:43,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:43,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 565 transitions. [2022-12-13 16:09:43,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 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 16:09:43,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:43,181 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:43,181 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 312 flow. Second operand 5 states and 565 transitions. [2022-12-13 16:09:43,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 115 transitions, 891 flow [2022-12-13 16:09:43,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 115 transitions, 880 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 16:09:43,187 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 315 flow [2022-12-13 16:09:43,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2022-12-13 16:09:43,187 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2022-12-13 16:09:43,188 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 315 flow [2022-12-13 16:09:43,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:43,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:43,188 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] [2022-12-13 16:09:43,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:09:43,188 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1057880491, now seen corresponding path program 2 times [2022-12-13 16:09:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:43,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693802123] [2022-12-13 16:09:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:43,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:43,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:43,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693802123] [2022-12-13 16:09:43,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693802123] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:43,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:43,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:43,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245037254] [2022-12-13 16:09:43,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:43,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:09:43,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:43,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:09:43,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:09:43,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2022-12-13 16:09:43,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:43,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:43,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2022-12-13 16:09:43,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:43,593 INFO L130 PetriNetUnfolder]: 1237/1713 cut-off events. [2022-12-13 16:09:43,593 INFO L131 PetriNetUnfolder]: For 4864/4864 co-relation queries the response was YES. [2022-12-13 16:09:43,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7609 conditions, 1713 events. 1237/1713 cut-off events. For 4864/4864 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6114 event pairs, 65 based on Foata normal form. 34/1747 useless extension candidates. Maximal degree in co-relation 5371. Up to 672 conditions per place. [2022-12-13 16:09:43,606 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 98 selfloop transitions, 9 changer transitions 4/111 dead transitions. [2022-12-13 16:09:43,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 899 flow [2022-12-13 16:09:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 561 transitions. [2022-12-13 16:09:43,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5008928571428571 [2022-12-13 16:09:43,609 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 561 transitions. [2022-12-13 16:09:43,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 561 transitions. [2022-12-13 16:09:43,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:43,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 561 transitions. [2022-12-13 16:09:43,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 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 16:09:43,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:43,613 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:43,613 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 315 flow. Second operand 5 states and 561 transitions. [2022-12-13 16:09:43,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 899 flow [2022-12-13 16:09:43,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 111 transitions, 866 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 16:09:43,620 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 319 flow [2022-12-13 16:09:43,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2022-12-13 16:09:43,621 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 25 predicate places. [2022-12-13 16:09:43,621 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 319 flow [2022-12-13 16:09:43,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:43,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:43,622 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] [2022-12-13 16:09:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:09:43,622 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash 390468395, now seen corresponding path program 2 times [2022-12-13 16:09:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:43,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443084339] [2022-12-13 16:09:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:43,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:43,752 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 16:09:43,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:43,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443084339] [2022-12-13 16:09:43,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443084339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:09:43,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898903407] [2022-12-13 16:09:43,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:09:43,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:09:43,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:09:43,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:09:43,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:09:43,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:09:43,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:09:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 16:09:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:09:43,976 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 16:09:43,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:09:44,030 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 16:09:44,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898903407] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:09:44,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:09:44,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 16:09:44,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199827250] [2022-12-13 16:09:44,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:09:44,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:09:44,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:09:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:09:44,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2022-12-13 16:09:44,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 319 flow. Second operand has 6 states, 6 states have (on average 104.66666666666667) internal successors, (628), 6 states have internal predecessors, (628), 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 16:09:44,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:44,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2022-12-13 16:09:44,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:44,431 INFO L130 PetriNetUnfolder]: 1441/1985 cut-off events. [2022-12-13 16:09:44,431 INFO L131 PetriNetUnfolder]: For 5398/5398 co-relation queries the response was YES. [2022-12-13 16:09:44,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9185 conditions, 1985 events. 1441/1985 cut-off events. For 5398/5398 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6959 event pairs, 257 based on Foata normal form. 68/2053 useless extension candidates. Maximal degree in co-relation 5914. Up to 1119 conditions per place. [2022-12-13 16:09:44,442 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 101 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2022-12-13 16:09:44,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 895 flow [2022-12-13 16:09:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2022-12-13 16:09:44,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4982142857142857 [2022-12-13 16:09:44,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2022-12-13 16:09:44,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2022-12-13 16:09:44,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:44,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2022-12-13 16:09:44,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 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 16:09:44,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:44,446 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:44,446 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 319 flow. Second operand 5 states and 558 transitions. [2022-12-13 16:09:44,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 895 flow [2022-12-13 16:09:44,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 888 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:09:44,451 INFO L231 Difference]: Finished difference. Result has 64 places, 50 transitions, 366 flow [2022-12-13 16:09:44,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=366, PETRI_PLACES=64, PETRI_TRANSITIONS=50} [2022-12-13 16:09:44,452 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2022-12-13 16:09:44,452 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 50 transitions, 366 flow [2022-12-13 16:09:44,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.66666666666667) internal successors, (628), 6 states have internal predecessors, (628), 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 16:09:44,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:44,452 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] [2022-12-13 16:09:44,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:09:44,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 16:09:44,653 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:44,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1277151903, now seen corresponding path program 2 times [2022-12-13 16:09:44,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:44,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591700119] [2022-12-13 16:09:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:44,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:44,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:44,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591700119] [2022-12-13 16:09:44,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591700119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:44,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:44,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:44,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29531220] [2022-12-13 16:09:44,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:44,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:09:44,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:09:44,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:09:44,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2022-12-13 16:09:44,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 50 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:44,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:44,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2022-12-13 16:09:44,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:45,110 INFO L130 PetriNetUnfolder]: 1657/2269 cut-off events. [2022-12-13 16:09:45,110 INFO L131 PetriNetUnfolder]: For 8452/8452 co-relation queries the response was YES. [2022-12-13 16:09:45,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11176 conditions, 2269 events. 1657/2269 cut-off events. For 8452/8452 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8138 event pairs, 481 based on Foata normal form. 68/2337 useless extension candidates. Maximal degree in co-relation 9708. Up to 1331 conditions per place. [2022-12-13 16:09:45,122 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 117 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2022-12-13 16:09:45,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 125 transitions, 1154 flow [2022-12-13 16:09:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2022-12-13 16:09:45,125 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5017857142857143 [2022-12-13 16:09:45,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2022-12-13 16:09:45,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2022-12-13 16:09:45,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:45,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2022-12-13 16:09:45,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 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 16:09:45,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:45,128 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 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 16:09:45,128 INFO L175 Difference]: Start difference. First operand has 64 places, 50 transitions, 366 flow. Second operand 5 states and 562 transitions. [2022-12-13 16:09:45,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 125 transitions, 1154 flow [2022-12-13 16:09:45,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 125 transitions, 1097 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-12-13 16:09:45,138 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 400 flow [2022-12-13 16:09:45,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=400, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2022-12-13 16:09:45,139 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 35 predicate places. [2022-12-13 16:09:45,139 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 400 flow [2022-12-13 16:09:45,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 16:09:45,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:45,139 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] [2022-12-13 16:09:45,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:09:45,140 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:09:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash -948844478, now seen corresponding path program 1 times [2022-12-13 16:09:45,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:45,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962786957] [2022-12-13 16:09:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:45,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:45,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:45,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962786957] [2022-12-13 16:09:45,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962786957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:09:45,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706700770] [2022-12-13 16:09:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:45,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:09:45,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:09:45,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:09:45,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:09:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:09:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:09:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:54,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:09:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:57,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706700770] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:09:57,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:09:57,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 16:09:57,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716616883] [2022-12-13 16:09:57,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:09:57,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:09:57,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:57,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:09:57,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=167, Unknown=1, NotChecked=0, Total=240 [2022-12-13 16:09:59,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:01,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:05,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:07,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:07,695 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 224 [2022-12-13 16:10:07,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 400 flow. Second operand has 16 states, 16 states have (on average 91.8125) internal successors, (1469), 16 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:07,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:10:07,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 224 [2022-12-13 16:10:07,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:10:10,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:12,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:13,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:16,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:18,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:20,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:23,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:25,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:27,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:29,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:31,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:33,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:34,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:43,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:45,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:48,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:49,680 INFO L130 PetriNetUnfolder]: 3591/4974 cut-off events. [2022-12-13 16:10:49,681 INFO L131 PetriNetUnfolder]: For 16080/16080 co-relation queries the response was YES. [2022-12-13 16:10:49,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24558 conditions, 4974 events. 3591/4974 cut-off events. For 16080/16080 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21956 event pairs, 195 based on Foata normal form. 3/4977 useless extension candidates. Maximal degree in co-relation 22585. Up to 2619 conditions per place. [2022-12-13 16:10:49,700 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 250 selfloop transitions, 101 changer transitions 10/361 dead transitions. [2022-12-13 16:10:49,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 361 transitions, 2915 flow [2022-12-13 16:10:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 16:10:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 16:10:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1670 transitions. [2022-12-13 16:10:49,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46595982142857145 [2022-12-13 16:10:49,704 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1670 transitions. [2022-12-13 16:10:49,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1670 transitions. [2022-12-13 16:10:49,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:10:49,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1670 transitions. [2022-12-13 16:10:49,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 104.375) internal successors, (1670), 16 states have internal predecessors, (1670), 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 16:10:49,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 224.0) internal successors, (3808), 17 states have internal predecessors, (3808), 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 16:10:49,710 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 224.0) internal successors, (3808), 17 states have internal predecessors, (3808), 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 16:10:49,710 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 400 flow. Second operand 16 states and 1670 transitions. [2022-12-13 16:10:49,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 361 transitions, 2915 flow [2022-12-13 16:10:49,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 361 transitions, 2859 flow, removed 23 selfloop flow, removed 2 redundant places. [2022-12-13 16:10:49,737 INFO L231 Difference]: Finished difference. Result has 92 places, 152 transitions, 1602 flow [2022-12-13 16:10:49,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1602, PETRI_PLACES=92, PETRI_TRANSITIONS=152} [2022-12-13 16:10:49,737 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 58 predicate places. [2022-12-13 16:10:49,737 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 152 transitions, 1602 flow [2022-12-13 16:10:49,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.8125) internal successors, (1469), 16 states have internal predecessors, (1469), 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 16:10:49,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:10:49,738 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] [2022-12-13 16:10:49,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:10:49,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:10:49,940 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:10:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:49,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1965449482, now seen corresponding path program 1 times [2022-12-13 16:10:49,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:49,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681613463] [2022-12-13 16:10:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:49,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:10:50,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:50,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681613463] [2022-12-13 16:10:50,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681613463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:10:50,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769535293] [2022-12-13 16:10:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:50,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:10:50,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:10:50,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:10:50,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:10:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 16:10:50,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:11:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:11:13,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:11:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:11:31,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769535293] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:11:31,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:11:31,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2022-12-13 16:11:31,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752489812] [2022-12-13 16:11:31,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:11:31,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 16:11:31,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:11:31,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 16:11:31,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=211, Unknown=6, NotChecked=0, Total=306 [2022-12-13 16:11:33,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:36,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:38,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:38,390 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 224 [2022-12-13 16:11:38,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 152 transitions, 1602 flow. Second operand has 18 states, 18 states have (on average 89.61111111111111) internal successors, (1613), 18 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:38,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:11:38,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 224 [2022-12-13 16:11:38,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:11:42,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:49,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:50,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:53,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:58,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:03,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:05,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:07,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:10,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:12,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:24,369 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 57 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:12:25,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:27,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:29,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:32,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:47,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:50,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:52,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:54,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:57,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:58,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:02,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:04,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:06,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:08,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:10,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:12,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:15,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:21,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:24,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:27,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:30,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:32,680 INFO L130 PetriNetUnfolder]: 6233/8877 cut-off events. [2022-12-13 16:13:32,681 INFO L131 PetriNetUnfolder]: For 45732/45732 co-relation queries the response was YES. [2022-12-13 16:13:32,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49229 conditions, 8877 events. 6233/8877 cut-off events. For 45732/45732 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45889 event pairs, 356 based on Foata normal form. 17/8894 useless extension candidates. Maximal degree in co-relation 46308. Up to 5119 conditions per place. [2022-12-13 16:13:32,724 INFO L137 encePairwiseOnDemand]: 209/224 looper letters, 375 selfloop transitions, 177 changer transitions 37/589 dead transitions. [2022-12-13 16:13:32,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 589 transitions, 5768 flow [2022-12-13 16:13:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 16:13:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 16:13:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2120 transitions. [2022-12-13 16:13:32,728 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45068027210884354 [2022-12-13 16:13:32,728 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2120 transitions. [2022-12-13 16:13:32,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2120 transitions. [2022-12-13 16:13:32,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:13:32,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2120 transitions. [2022-12-13 16:13:32,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 100.95238095238095) internal successors, (2120), 21 states have internal predecessors, (2120), 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 16:13:32,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 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 16:13:32,736 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 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 16:13:32,736 INFO L175 Difference]: Start difference. First operand has 92 places, 152 transitions, 1602 flow. Second operand 21 states and 2120 transitions. [2022-12-13 16:13:32,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 589 transitions, 5768 flow [2022-12-13 16:13:32,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 589 transitions, 5445 flow, removed 158 selfloop flow, removed 1 redundant places. [2022-12-13 16:13:32,856 INFO L231 Difference]: Finished difference. Result has 124 places, 327 transitions, 3790 flow [2022-12-13 16:13:32,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3790, PETRI_PLACES=124, PETRI_TRANSITIONS=327} [2022-12-13 16:13:32,857 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 90 predicate places. [2022-12-13 16:13:32,857 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 327 transitions, 3790 flow [2022-12-13 16:13:32,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.61111111111111) internal successors, (1613), 18 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:32,857 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:13:32,857 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] [2022-12-13 16:13:32,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:13:33,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:33,059 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:13:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:33,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1511158406, now seen corresponding path program 2 times [2022-12-13 16:13:33,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:33,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361596235] [2022-12-13 16:13:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:33,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:13:33,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:33,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361596235] [2022-12-13 16:13:33,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361596235] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:13:33,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985033950] [2022-12-13 16:13:33,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:13:33,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:33,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:13:33,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:13:33,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:13:33,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:13:33,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:13:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:13:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:13:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:13:50,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:13:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:13:55,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985033950] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:13:55,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:13:55,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 16:13:55,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558352121] [2022-12-13 16:13:55,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:13:55,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:13:55,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:13:55,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=169, Unknown=4, NotChecked=0, Total=240 [2022-12-13 16:13:58,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:00,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:02,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:03,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:05,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:06,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:08,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:09,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 224 [2022-12-13 16:14:09,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 327 transitions, 3790 flow. Second operand has 16 states, 16 states have (on average 90.0625) internal successors, (1441), 16 states have internal predecessors, (1441), 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 16:14:09,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:14:09,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 224 [2022-12-13 16:14:09,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:14:14,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:17,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:19,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:20,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:22,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:24,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:26,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:28,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:30,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:34,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:36,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:39,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:41,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:43,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:45,940 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x1~0 4294967296)) (.cse1 (mod (div (- c_~x3~0) (- 2)) 4294967296)) (.cse2 (mod c_~n~0 4294967296))) (and (< 0 .cse0) (= .cse0 (mod c_~x2~0 4294967296)) (= .cse1 (mod (div c_~x4~0 2) 4294967296)) (not (< (mod c_~x4~0 4294967296) .cse2)) (< .cse1 .cse2) (or (not (< (mod c_~x3~0 4294967296) .cse2)) (< (* 2 (mod c_~x3~0 2147483648)) .cse2) (let ((.cse5 (* c_~x3~0 2))) (let ((.cse4 (+ .cse5 (* (div c_~x4~0 4294967296) 4294967296))) (.cse3 (* (div .cse5 4294967296) 4294967296))) (and (<= (+ .cse3 c_~x4~0) .cse4) (< .cse4 (+ .cse3 c_~x4~0 1)) (= (+ c_~x1~0 (* (div c_~x2~0 4294967296) 4294967296)) (+ (* 4294967296 (div c_~x1~0 4294967296)) c_~x2~0)))))) (= (mod c_~x4~0 2) 0) (= (mod c_~x3~0 2) 0))) is different from false [2022-12-13 16:14:48,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:50,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:52,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:54,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:57,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:59,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:01,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:03,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:25,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:35,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:37,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:39,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:41,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:43,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:45,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:48,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:50,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:51,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:53,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:55,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:57,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:01,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:03,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:08,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:11,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:12,205 INFO L130 PetriNetUnfolder]: 7245/10415 cut-off events. [2022-12-13 16:16:12,205 INFO L131 PetriNetUnfolder]: For 76715/76715 co-relation queries the response was YES. [2022-12-13 16:16:12,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67331 conditions, 10415 events. 7245/10415 cut-off events. For 76715/76715 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 55776 event pairs, 413 based on Foata normal form. 21/10436 useless extension candidates. Maximal degree in co-relation 67096. Up to 5926 conditions per place. [2022-12-13 16:16:12,263 INFO L137 encePairwiseOnDemand]: 208/224 looper letters, 423 selfloop transitions, 256 changer transitions 47/726 dead transitions. [2022-12-13 16:16:12,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 726 transitions, 8799 flow [2022-12-13 16:16:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 16:16:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 16:16:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2091 transitions. [2022-12-13 16:16:12,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.444515306122449 [2022-12-13 16:16:12,274 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2091 transitions. [2022-12-13 16:16:12,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2091 transitions. [2022-12-13 16:16:12,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:16:12,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2091 transitions. [2022-12-13 16:16:12,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 99.57142857142857) internal successors, (2091), 21 states have internal predecessors, (2091), 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 16:16:12,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 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 16:16:12,280 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 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 16:16:12,281 INFO L175 Difference]: Start difference. First operand has 124 places, 327 transitions, 3790 flow. Second operand 21 states and 2091 transitions. [2022-12-13 16:16:12,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 726 transitions, 8799 flow [2022-12-13 16:16:12,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 726 transitions, 8116 flow, removed 337 selfloop flow, removed 2 redundant places. [2022-12-13 16:16:12,675 INFO L231 Difference]: Finished difference. Result has 156 places, 477 transitions, 6221 flow [2022-12-13 16:16:12,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6221, PETRI_PLACES=156, PETRI_TRANSITIONS=477} [2022-12-13 16:16:12,676 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 122 predicate places. [2022-12-13 16:16:12,676 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 477 transitions, 6221 flow [2022-12-13 16:16:12,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.0625) internal successors, (1441), 16 states have internal predecessors, (1441), 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 16:16:12,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:16:12,676 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] [2022-12-13 16:16:12,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:16:12,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:12,878 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:16:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:16:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1505541682, now seen corresponding path program 2 times [2022-12-13 16:16:12,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:16:12,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77893221] [2022-12-13 16:16:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:12,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:16:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:16:13,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:16:13,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77893221] [2022-12-13 16:16:13,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77893221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:13,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19609945] [2022-12-13 16:16:13,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:16:13,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:13,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:16:13,271 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:16:13,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:16:21,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:16:21,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:16:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 16:16:21,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:16:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:16:42,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:17:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:17:22,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19609945] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:17:22,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:17:22,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 16:17:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072242972] [2022-12-13 16:17:22,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:17:22,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:17:22,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:17:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:17:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=150, Unknown=4, NotChecked=0, Total=240 [2022-12-13 16:17:24,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:27,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:28,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:30,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:32,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:35,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:37,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:40,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:40,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 224 [2022-12-13 16:17:40,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 477 transitions, 6221 flow. Second operand has 16 states, 16 states have (on average 89.6875) internal successors, (1435), 16 states have internal predecessors, (1435), 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 16:17:40,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:17:40,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 224 [2022-12-13 16:17:40,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:17:42,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:43,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:46,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:48,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:50,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:52,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:54,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:56,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:59,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:02,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:04,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:06,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:08,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:11,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:13,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:15,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:17,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:20,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:22,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:25,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:26,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:28,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:30,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:34,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:36,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:38,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:41,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:43,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:45,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:47,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:49,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:51,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:53,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:55,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:18:58,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:00,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:02,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:04,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:05,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:23,718 WARN L233 SmtUtils]: Spent 14.03s on a formula simplification. DAG size of input: 70 DAG size of output: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:19:25,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:29,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:31,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:33,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:35,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:39,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:42,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:44,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:46,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:48,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:51,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:53,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:56,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:19:58,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:20:01,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:20:03,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:20:04,045 INFO L130 PetriNetUnfolder]: 11598/17020 cut-off events. [2022-12-13 16:20:04,045 INFO L131 PetriNetUnfolder]: For 196166/196166 co-relation queries the response was YES. [2022-12-13 16:20:04,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121930 conditions, 17020 events. 11598/17020 cut-off events. For 196166/196166 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 102472 event pairs, 793 based on Foata normal form. 58/17078 useless extension candidates. Maximal degree in co-relation 121271. Up to 9724 conditions per place. [2022-12-13 16:20:04,168 INFO L137 encePairwiseOnDemand]: 211/224 looper letters, 606 selfloop transitions, 338 changer transitions 18/962 dead transitions. [2022-12-13 16:20:04,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 962 transitions, 13538 flow [2022-12-13 16:20:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 16:20:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 16:20:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1550 transitions. [2022-12-13 16:20:04,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2022-12-13 16:20:04,173 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1550 transitions. [2022-12-13 16:20:04,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1550 transitions. [2022-12-13 16:20:04,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:20:04,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1550 transitions. [2022-12-13 16:20:04,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 103.33333333333333) internal successors, (1550), 15 states have internal predecessors, (1550), 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 16:20:04,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 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 16:20:04,184 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 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 16:20:04,185 INFO L175 Difference]: Start difference. First operand has 156 places, 477 transitions, 6221 flow. Second operand 15 states and 1550 transitions. [2022-12-13 16:20:04,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 962 transitions, 13538 flow [2022-12-13 16:20:05,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 962 transitions, 13024 flow, removed 252 selfloop flow, removed 4 redundant places. [2022-12-13 16:20:05,056 INFO L231 Difference]: Finished difference. Result has 176 places, 708 transitions, 10409 flow [2022-12-13 16:20:05,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5914, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10409, PETRI_PLACES=176, PETRI_TRANSITIONS=708} [2022-12-13 16:20:05,057 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 142 predicate places. [2022-12-13 16:20:05,057 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 708 transitions, 10409 flow [2022-12-13 16:20:05,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 89.6875) internal successors, (1435), 16 states have internal predecessors, (1435), 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 16:20:05,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:20:05,058 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] [2022-12-13 16:20:05,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:20:05,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:20:05,260 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:20:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:20:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1667180782, now seen corresponding path program 3 times [2022-12-13 16:20:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:20:05,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000956761] [2022-12-13 16:20:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:20:05,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:20:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:20:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:20:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:20:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000956761] [2022-12-13 16:20:05,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000956761] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:20:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096042204] [2022-12-13 16:20:05,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:20:05,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:20:05,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:20:05,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:20:05,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:20:05,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:20:05,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:20:05,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 16:20:05,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:20:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:20:19,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:21:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:21:04,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096042204] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:21:04,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:21:04,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 16:21:04,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748309431] [2022-12-13 16:21:04,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:21:04,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:21:04,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:21:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:21:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=160, Unknown=7, NotChecked=0, Total=240 [2022-12-13 16:21:05,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:08,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:12,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:13,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:16,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:18,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:18,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 224 [2022-12-13 16:21:18,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 708 transitions, 10409 flow. Second operand has 16 states, 16 states have (on average 89.8125) internal successors, (1437), 16 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:21:18,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:21:18,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 224 [2022-12-13 16:21:18,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:21:20,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:22,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:28,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:31,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:34,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:37,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:39,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:43,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:45,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:50,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:52,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:54,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:21:59,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:22:01,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:22:33,215 WARN L233 SmtUtils]: Spent 14.14s on a formula simplification. DAG size of input: 56 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:22:34,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:22:36,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:22:37,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:22:39,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:22:41,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:22:47,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:22:49,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:01,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:02,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:06,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:09,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:11,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:12,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:14,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:18,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:21,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:24,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:27,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:29,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:32,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:36,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:38,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:41,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:46,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:49,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:50,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:55,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:23:58,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:24:01,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:24:03,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 16:24:04,487 INFO L130 PetriNetUnfolder]: 14061/20744 cut-off events. [2022-12-13 16:24:04,487 INFO L131 PetriNetUnfolder]: For 343644/343644 co-relation queries the response was YES. [2022-12-13 16:24:04,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169817 conditions, 20744 events. 14061/20744 cut-off events. For 343644/343644 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 129913 event pairs, 1063 based on Foata normal form. 44/20788 useless extension candidates. Maximal degree in co-relation 168492. Up to 11896 conditions per place. [2022-12-13 16:24:04,648 INFO L137 encePairwiseOnDemand]: 211/224 looper letters, 702 selfloop transitions, 438 changer transitions 43/1183 dead transitions. [2022-12-13 16:24:04,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 1183 transitions, 18929 flow [2022-12-13 16:24:04,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 16:24:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 16:24:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1828 transitions. [2022-12-13 16:24:04,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45337301587301587 [2022-12-13 16:24:04,651 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1828 transitions. [2022-12-13 16:24:04,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1828 transitions. [2022-12-13 16:24:04,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:24:04,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1828 transitions. [2022-12-13 16:24:04,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 101.55555555555556) internal successors, (1828), 18 states have internal predecessors, (1828), 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 16:24:04,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 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 16:24:04,660 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 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 16:24:04,661 INFO L175 Difference]: Start difference. First operand has 176 places, 708 transitions, 10409 flow. Second operand 18 states and 1828 transitions. [2022-12-13 16:24:04,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 1183 transitions, 18929 flow [2022-12-13 16:24:06,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1183 transitions, 18330 flow, removed 294 selfloop flow, removed 1 redundant places. [2022-12-13 16:24:06,483 INFO L231 Difference]: Finished difference. Result has 200 places, 906 transitions, 14732 flow [2022-12-13 16:24:06,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=10030, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14732, PETRI_PLACES=200, PETRI_TRANSITIONS=906} [2022-12-13 16:24:06,483 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 166 predicate places. [2022-12-13 16:24:06,483 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 906 transitions, 14732 flow [2022-12-13 16:24:06,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 89.8125) internal successors, (1437), 16 states have internal predecessors, (1437), 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 16:24:06,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:24:06,484 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:24:06,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:24:06,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:24:06,685 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:24:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:24:06,686 INFO L85 PathProgramCache]: Analyzing trace with hash -219660661, now seen corresponding path program 4 times [2022-12-13 16:24:06,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:24:06,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45364339] [2022-12-13 16:24:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:24:06,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:24:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:24:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:24:06,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:24:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45364339] [2022-12-13 16:24:06,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45364339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:24:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171941961] [2022-12-13 16:24:06,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:24:06,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:24:06,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:24:06,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:24:06,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceaf2136-80d3-4f54-9f81-43cf7a24f447/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:24:08,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:24:08,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:24:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 16:24:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:24:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:24:19,862 INFO L328 TraceCheckSpWp]: Computing backward predicates...