./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/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_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/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_230096be-9c48-4f97-be6d-7e4f99da4838/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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- 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 16:25:52,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:25:52,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:25:52,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:25:52,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:25:52,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:25:52,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:25:52,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:25:52,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:25:52,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:25:52,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:25:52,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:25:52,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:25:52,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:25:52,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:25:52,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:25:52,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:25:52,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:25:52,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:25:52,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:25:52,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:25:52,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:25:52,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:25:52,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:25:52,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:25:52,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:25:52,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:25:52,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:25:52,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:25:52,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:25:52,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:25:52,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:25:52,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:25:52,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:25:52,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:25:52,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:25:52,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:25:52,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:25:52,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:25:52,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:25:52,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:25:52,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:25:52,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:25:52,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:25:52,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:25:52,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:25:52,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:25:52,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:25:52,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:25:52,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:25:52,393 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:25:52,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:25:52,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:25:52,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:25:52,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:25:52,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:25:52,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:25:52,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:25:52,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:25:52,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:25:52,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:25:52,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:25:52,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:25:52,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:25:52,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:25:52,395 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:25:52,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:25:52,395 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:25:52,395 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_230096be-9c48-4f97-be6d-7e4f99da4838/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-12-13 16:25:52,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:25:52,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:25:52,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:25:52,610 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:25:52,610 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:25:52,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-12-13 16:25:55,133 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:25:55,261 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:25:55,261 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-12-13 16:25:55,266 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/data/8d559e3da/e99f0773f48840198778552a727768c2/FLAGee3a9eb5a [2022-12-13 16:25:55,688 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/data/8d559e3da/e99f0773f48840198778552a727768c2 [2022-12-13 16:25:55,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:25:55,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:25:55,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:25:55,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:25:55,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:25:55,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ee13b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55, skipping insertion in model container [2022-12-13 16:25:55,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:25:55,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:25:55,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:25:55,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:25:55,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:25:55,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:25:55,820 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_230096be-9c48-4f97-be6d-7e4f99da4838/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-12-13 16:25:55,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:25:55,829 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:25:55,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:25:55,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:25:55,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:25:55,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:25:55,843 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_230096be-9c48-4f97-be6d-7e4f99da4838/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-12-13 16:25:55,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:25:55,854 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:25:55,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55 WrapperNode [2022-12-13 16:25:55,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:25:55,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:25:55,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:25:55,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:25:55,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,878 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-12-13 16:25:55,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:25:55,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:25:55,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:25:55,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:25:55,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,894 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:25:55,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:25:55,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:25:55,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:25:55,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (1/1) ... [2022-12-13 16:25:55,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:25:55,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:25:55,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:25:55,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:25:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:25:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:25:55,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:25:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:25:55,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:25:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:25:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:25:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:25:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 16:25:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 16:25:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:25:55,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:25:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:25:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:25:55,952 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 16:25:56,022 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:25:56,024 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:25:56,156 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:25:56,189 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:25:56,190 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 16:25:56,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:25:56 BoogieIcfgContainer [2022-12-13 16:25:56,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:25:56,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:25:56,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:25:56,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:25:56,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:25:55" (1/3) ... [2022-12-13 16:25:56,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4714c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:25:56, skipping insertion in model container [2022-12-13 16:25:56,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:25:55" (2/3) ... [2022-12-13 16:25:56,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4714c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:25:56, skipping insertion in model container [2022-12-13 16:25:56,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:25:56" (3/3) ... [2022-12-13 16:25:56,198 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-12-13 16:25:56,204 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:25:56,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:25:56,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:25:56,212 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:25:56,258 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:25:56,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-12-13 16:25:56,329 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-12-13 16:25:56,329 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:25:56,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-12-13 16:25:56,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-12-13 16:25:56,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-12-13 16:25:56,338 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:25:56,345 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 78 transitions, 168 flow [2022-12-13 16:25:56,347 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 78 transitions, 168 flow [2022-12-13 16:25:56,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 78 transitions, 168 flow [2022-12-13 16:25:56,363 INFO L130 PetriNetUnfolder]: 6/78 cut-off events. [2022-12-13 16:25:56,363 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:25:56,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 6/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-12-13 16:25:56,364 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2022-12-13 16:25:58,289 INFO L134 LiptonReduction]: Checked pairs total: 570 [2022-12-13 16:25:58,290 INFO L136 LiptonReduction]: Total number of compositions: 75 [2022-12-13 16:25:58,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:25:58,304 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;@3aab46b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:25:58,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 16:25:58,308 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-13 16:25:58,308 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:25:58,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:25:58,308 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:25:58,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:25:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:25:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1984581523, now seen corresponding path program 1 times [2022-12-13 16:25:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:25:58,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447140000] [2022-12-13 16:25:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:58,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:25:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:58,766 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 16:25:58,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:25:58,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447140000] [2022-12-13 16:25:58,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447140000] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:25:58,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:25:58,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:25:58,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34289394] [2022-12-13 16:25:58,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:25:58,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:25:58,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:25:58,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:25:58,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:25:58,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 164 [2022-12-13 16:25:58,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:25:58,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:25:58,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 164 [2022-12-13 16:25:58,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:25:58,993 INFO L130 PetriNetUnfolder]: 76/144 cut-off events. [2022-12-13 16:25:58,993 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 16:25:58,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 144 events. 76/144 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 414 event pairs, 6 based on Foata normal form. 1/111 useless extension candidates. Maximal degree in co-relation 232. Up to 81 conditions per place. [2022-12-13 16:25:58,997 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 33 selfloop transitions, 9 changer transitions 5/47 dead transitions. [2022-12-13 16:25:58,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 47 transitions, 221 flow [2022-12-13 16:25:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:25:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:25:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 517 transitions. [2022-12-13 16:25:59,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45034843205574915 [2022-12-13 16:25:59,014 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 517 transitions. [2022-12-13 16:25:59,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 517 transitions. [2022-12-13 16:25:59,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:25:59,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 517 transitions. [2022-12-13 16:25:59,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.85714285714286) internal successors, (517), 7 states have internal predecessors, (517), 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 16:25:59,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:25:59,029 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:25:59,030 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 517 transitions. [2022-12-13 16:25:59,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 47 transitions, 221 flow [2022-12-13 16:25:59,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 16:25:59,034 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 94 flow [2022-12-13 16:25:59,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=94, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2022-12-13 16:25:59,038 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2022-12-13 16:25:59,038 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 94 flow [2022-12-13 16:25:59,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:25:59,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:25:59,039 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:25:59,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:25:59,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:25:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:25:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1276314721, now seen corresponding path program 2 times [2022-12-13 16:25:59,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:25:59,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321809891] [2022-12-13 16:25:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:59,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:25:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:59,304 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 16:25:59,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:25:59,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321809891] [2022-12-13 16:25:59,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321809891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:25:59,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:25:59,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:25:59,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164610693] [2022-12-13 16:25:59,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:25:59,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:25:59,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:25:59,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:25:59,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:25:59,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 164 [2022-12-13 16:25:59,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:25:59,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:25:59,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 164 [2022-12-13 16:25:59,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:25:59,553 INFO L130 PetriNetUnfolder]: 81/153 cut-off events. [2022-12-13 16:25:59,554 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-13 16:25:59,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 153 events. 81/153 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 455 event pairs, 10 based on Foata normal form. 1/146 useless extension candidates. Maximal degree in co-relation 453. Up to 85 conditions per place. [2022-12-13 16:25:59,555 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 35 selfloop transitions, 13 changer transitions 5/53 dead transitions. [2022-12-13 16:25:59,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 53 transitions, 303 flow [2022-12-13 16:25:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:25:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:25:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 519 transitions. [2022-12-13 16:25:59,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4520905923344948 [2022-12-13 16:25:59,557 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 519 transitions. [2022-12-13 16:25:59,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 519 transitions. [2022-12-13 16:25:59,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:25:59,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 519 transitions. [2022-12-13 16:25:59,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 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 16:25:59,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:25:59,560 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:25:59,560 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 94 flow. Second operand 7 states and 519 transitions. [2022-12-13 16:25:59,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 53 transitions, 303 flow [2022-12-13 16:25:59,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 289 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-13 16:25:59,562 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 164 flow [2022-12-13 16:25:59,562 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=164, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2022-12-13 16:25:59,563 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2022-12-13 16:25:59,563 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 164 flow [2022-12-13 16:25:59,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:25:59,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:25:59,563 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:25:59,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:25:59,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:25:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:25:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash -603211531, now seen corresponding path program 3 times [2022-12-13 16:25:59,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:25:59,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394320273] [2022-12-13 16:25:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:59,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:25:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:59,761 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 16:25:59,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:25:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394320273] [2022-12-13 16:25:59,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394320273] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:25:59,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:25:59,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:25:59,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706440293] [2022-12-13 16:25:59,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:25:59,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:25:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:25:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:25:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:25:59,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 164 [2022-12-13 16:25:59,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:25:59,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:25:59,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 164 [2022-12-13 16:25:59,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:25:59,952 INFO L130 PetriNetUnfolder]: 93/179 cut-off events. [2022-12-13 16:25:59,952 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2022-12-13 16:25:59,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 179 events. 93/179 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 565 event pairs, 18 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 654. Up to 95 conditions per place. [2022-12-13 16:25:59,954 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 37 selfloop transitions, 18 changer transitions 5/60 dead transitions. [2022-12-13 16:25:59,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 409 flow [2022-12-13 16:25:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:25:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:25:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 522 transitions. [2022-12-13 16:25:59,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4547038327526132 [2022-12-13 16:25:59,957 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 522 transitions. [2022-12-13 16:25:59,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 522 transitions. [2022-12-13 16:25:59,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:25:59,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 522 transitions. [2022-12-13 16:25:59,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 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 16:25:59,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:25:59,961 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:25:59,961 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 164 flow. Second operand 7 states and 522 transitions. [2022-12-13 16:25:59,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 409 flow [2022-12-13 16:25:59,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 378 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-12-13 16:25:59,965 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 244 flow [2022-12-13 16:25:59,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=244, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2022-12-13 16:25:59,966 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2022-12-13 16:25:59,966 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 244 flow [2022-12-13 16:25:59,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:25:59,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:25:59,967 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:25:59,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:25:59,967 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:25:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:25:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1282965921, now seen corresponding path program 4 times [2022-12-13 16:25:59,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:25:59,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177784709] [2022-12-13 16:25:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:59,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:25:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:00,173 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 16:26:00,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:00,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177784709] [2022-12-13 16:26:00,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177784709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:00,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:00,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:26:00,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307703806] [2022-12-13 16:26:00,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:00,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:26:00,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:00,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:26:00,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:26:00,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 164 [2022-12-13 16:26:00,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:26:00,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:00,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 164 [2022-12-13 16:26:00,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:00,389 INFO L130 PetriNetUnfolder]: 107/207 cut-off events. [2022-12-13 16:26:00,389 INFO L131 PetriNetUnfolder]: For 414/414 co-relation queries the response was YES. [2022-12-13 16:26:00,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 207 events. 107/207 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 695 event pairs, 16 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 781. Up to 95 conditions per place. [2022-12-13 16:26:00,390 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 39 selfloop transitions, 21 changer transitions 5/65 dead transitions. [2022-12-13 16:26:00,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 488 flow [2022-12-13 16:26:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:26:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:26:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 522 transitions. [2022-12-13 16:26:00,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4547038327526132 [2022-12-13 16:26:00,392 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 522 transitions. [2022-12-13 16:26:00,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 522 transitions. [2022-12-13 16:26:00,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:00,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 522 transitions. [2022-12-13 16:26:00,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 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 16:26:00,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:26:00,394 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:26:00,394 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 244 flow. Second operand 7 states and 522 transitions. [2022-12-13 16:26:00,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 488 flow [2022-12-13 16:26:00,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 462 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 16:26:00,397 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 330 flow [2022-12-13 16:26:00,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2022-12-13 16:26:00,398 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2022-12-13 16:26:00,398 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 330 flow [2022-12-13 16:26:00,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:26:00,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:00,398 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:00,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:26:00,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:00,399 INFO L85 PathProgramCache]: Analyzing trace with hash -641906909, now seen corresponding path program 5 times [2022-12-13 16:26:00,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:00,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456852875] [2022-12-13 16:26:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:00,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:00,582 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 16:26:00,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:00,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456852875] [2022-12-13 16:26:00,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456852875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:00,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:00,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:26:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226474870] [2022-12-13 16:26:00,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:00,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:26:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:26:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:26:00,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 164 [2022-12-13 16:26:00,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 330 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:26:00,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:00,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 164 [2022-12-13 16:26:00,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:00,802 INFO L130 PetriNetUnfolder]: 106/200 cut-off events. [2022-12-13 16:26:00,802 INFO L131 PetriNetUnfolder]: For 631/631 co-relation queries the response was YES. [2022-12-13 16:26:00,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 200 events. 106/200 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 656 event pairs, 16 based on Foata normal form. 1/199 useless extension candidates. Maximal degree in co-relation 865. Up to 95 conditions per place. [2022-12-13 16:26:00,803 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 37 selfloop transitions, 21 changer transitions 5/63 dead transitions. [2022-12-13 16:26:00,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 540 flow [2022-12-13 16:26:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:26:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:26:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 520 transitions. [2022-12-13 16:26:00,805 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2022-12-13 16:26:00,805 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 520 transitions. [2022-12-13 16:26:00,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 520 transitions. [2022-12-13 16:26:00,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:00,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 520 transitions. [2022-12-13 16:26:00,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.28571428571429) internal successors, (520), 7 states have internal predecessors, (520), 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 16:26:00,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:26:00,807 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:26:00,807 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 330 flow. Second operand 7 states and 520 transitions. [2022-12-13 16:26:00,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 540 flow [2022-12-13 16:26:00,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 513 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 16:26:00,810 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 376 flow [2022-12-13 16:26:00,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=376, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2022-12-13 16:26:00,811 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2022-12-13 16:26:00,811 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 376 flow [2022-12-13 16:26:00,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:26:00,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:00,811 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:00,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:26:00,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1618691583, now seen corresponding path program 6 times [2022-12-13 16:26:00,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:00,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342073345] [2022-12-13 16:26:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:00,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:00,977 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 16:26:00,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:00,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342073345] [2022-12-13 16:26:00,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342073345] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:00,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:00,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:26:00,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35038154] [2022-12-13 16:26:00,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:00,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:26:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:26:00,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:26:01,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 164 [2022-12-13 16:26:01,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:26:01,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:01,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 164 [2022-12-13 16:26:01,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:01,191 INFO L130 PetriNetUnfolder]: 125/231 cut-off events. [2022-12-13 16:26:01,191 INFO L131 PetriNetUnfolder]: For 820/820 co-relation queries the response was YES. [2022-12-13 16:26:01,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 231 events. 125/231 cut-off events. For 820/820 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 771 event pairs, 32 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 993. Up to 99 conditions per place. [2022-12-13 16:26:01,194 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 37 selfloop transitions, 23 changer transitions 5/65 dead transitions. [2022-12-13 16:26:01,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 601 flow [2022-12-13 16:26:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:26:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:26:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 520 transitions. [2022-12-13 16:26:01,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2022-12-13 16:26:01,197 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 520 transitions. [2022-12-13 16:26:01,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 520 transitions. [2022-12-13 16:26:01,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:01,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 520 transitions. [2022-12-13 16:26:01,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.28571428571429) internal successors, (520), 7 states have internal predecessors, (520), 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 16:26:01,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:26:01,203 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 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 16:26:01,203 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 376 flow. Second operand 7 states and 520 transitions. [2022-12-13 16:26:01,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 601 flow [2022-12-13 16:26:01,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 556 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-13 16:26:01,210 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 439 flow [2022-12-13 16:26:01,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2022-12-13 16:26:01,211 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2022-12-13 16:26:01,211 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 439 flow [2022-12-13 16:26:01,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 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 16:26:01,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:01,211 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:01,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:26:01,212 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:01,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:01,212 INFO L85 PathProgramCache]: Analyzing trace with hash -213164807, now seen corresponding path program 1 times [2022-12-13 16:26:01,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:01,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216657284] [2022-12-13 16:26:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:01,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:01,367 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 16:26:01,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:01,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216657284] [2022-12-13 16:26:01,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216657284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575941913] [2022-12-13 16:26:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:01,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:01,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:01,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:01,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:26:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:01,603 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 16:26:01,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:01,767 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 16:26:01,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575941913] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:01,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:01,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 16:26:01,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436710467] [2022-12-13 16:26:01,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:01,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:01,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:01,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:01,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:01,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:01,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 439 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:01,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:01,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:01,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:02,537 INFO L130 PetriNetUnfolder]: 150/315 cut-off events. [2022-12-13 16:26:02,538 INFO L131 PetriNetUnfolder]: For 826/826 co-relation queries the response was YES. [2022-12-13 16:26:02,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1225 conditions, 315 events. 150/315 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1350 event pairs, 4 based on Foata normal form. 26/341 useless extension candidates. Maximal degree in co-relation 1183. Up to 85 conditions per place. [2022-12-13 16:26:02,540 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 75 selfloop transitions, 29 changer transitions 22/126 dead transitions. [2022-12-13 16:26:02,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 126 transitions, 891 flow [2022-12-13 16:26:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:26:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 16:26:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1357 transitions. [2022-12-13 16:26:02,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43549422336328625 [2022-12-13 16:26:02,543 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1357 transitions. [2022-12-13 16:26:02,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1357 transitions. [2022-12-13 16:26:02,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:02,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1357 transitions. [2022-12-13 16:26:02,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 71.42105263157895) internal successors, (1357), 19 states have internal predecessors, (1357), 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 16:26:02,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:02,549 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:02,549 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 439 flow. Second operand 19 states and 1357 transitions. [2022-12-13 16:26:02,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 126 transitions, 891 flow [2022-12-13 16:26:02,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 126 transitions, 846 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-12-13 16:26:02,553 INFO L231 Difference]: Finished difference. Result has 76 places, 46 transitions, 425 flow [2022-12-13 16:26:02,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=425, PETRI_PLACES=76, PETRI_TRANSITIONS=46} [2022-12-13 16:26:02,553 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2022-12-13 16:26:02,554 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 46 transitions, 425 flow [2022-12-13 16:26:02,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:02,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:02,554 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:02,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:02,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:02,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash 562730443, now seen corresponding path program 2 times [2022-12-13 16:26:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:02,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578318389] [2022-12-13 16:26:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:02,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:02,914 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 16:26:02,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:02,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578318389] [2022-12-13 16:26:02,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578318389] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:02,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927941307] [2022-12-13 16:26:02,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:26:02,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:02,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:02,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:02,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:26:02,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:02,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:02,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:02,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:03,119 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 16:26:03,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:03,290 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 16:26:03,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927941307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:03,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:03,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 16:26:03,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085149225] [2022-12-13 16:26:03,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:03,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:03,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:03,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:03,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:03,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:03,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 46 transitions, 425 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:03,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:03,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:03,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:04,042 INFO L130 PetriNetUnfolder]: 168/353 cut-off events. [2022-12-13 16:26:04,042 INFO L131 PetriNetUnfolder]: For 1049/1049 co-relation queries the response was YES. [2022-12-13 16:26:04,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1583 conditions, 353 events. 168/353 cut-off events. For 1049/1049 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1556 event pairs, 6 based on Foata normal form. 2/355 useless extension candidates. Maximal degree in co-relation 1525. Up to 105 conditions per place. [2022-12-13 16:26:04,044 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 82 selfloop transitions, 43 changer transitions 10/135 dead transitions. [2022-12-13 16:26:04,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 135 transitions, 1087 flow [2022-12-13 16:26:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 16:26:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 16:26:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1490 transitions. [2022-12-13 16:26:04,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326364692218351 [2022-12-13 16:26:04,047 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1490 transitions. [2022-12-13 16:26:04,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1490 transitions. [2022-12-13 16:26:04,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:04,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1490 transitions. [2022-12-13 16:26:04,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 70.95238095238095) internal successors, (1490), 21 states have internal predecessors, (1490), 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 16:26:04,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 164.0) internal successors, (3608), 22 states have internal predecessors, (3608), 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 16:26:04,053 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 164.0) internal successors, (3608), 22 states have internal predecessors, (3608), 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 16:26:04,054 INFO L175 Difference]: Start difference. First operand has 76 places, 46 transitions, 425 flow. Second operand 21 states and 1490 transitions. [2022-12-13 16:26:04,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 135 transitions, 1087 flow [2022-12-13 16:26:04,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 135 transitions, 878 flow, removed 80 selfloop flow, removed 16 redundant places. [2022-12-13 16:26:04,058 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 506 flow [2022-12-13 16:26:04,058 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=506, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2022-12-13 16:26:04,059 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2022-12-13 16:26:04,059 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 506 flow [2022-12-13 16:26:04,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:04,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:04,059 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:04,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:26:04,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:04,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:04,262 INFO L85 PathProgramCache]: Analyzing trace with hash 487167013, now seen corresponding path program 3 times [2022-12-13 16:26:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:04,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388703601] [2022-12-13 16:26:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:04,592 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 16:26:04,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:04,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388703601] [2022-12-13 16:26:04,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388703601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:04,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643998112] [2022-12-13 16:26:04,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:26:04,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:04,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:04,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:26:04,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:26:04,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:04,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:04,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:04,783 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 16:26:04,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:04,911 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 16:26:04,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643998112] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:04,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:04,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2022-12-13 16:26:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359611485] [2022-12-13 16:26:04,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:04,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:26:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:26:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:26:05,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 164 [2022-12-13 16:26:05,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 506 flow. Second operand has 20 states, 20 states have (on average 64.0) internal successors, (1280), 20 states have internal predecessors, (1280), 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 16:26:05,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:05,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 164 [2022-12-13 16:26:05,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:05,711 INFO L130 PetriNetUnfolder]: 168/351 cut-off events. [2022-12-13 16:26:05,711 INFO L131 PetriNetUnfolder]: For 1231/1231 co-relation queries the response was YES. [2022-12-13 16:26:05,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 351 events. 168/351 cut-off events. For 1231/1231 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1536 event pairs, 2 based on Foata normal form. 2/353 useless extension candidates. Maximal degree in co-relation 1570. Up to 101 conditions per place. [2022-12-13 16:26:05,714 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 80 selfloop transitions, 39 changer transitions 10/129 dead transitions. [2022-12-13 16:26:05,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1027 flow [2022-12-13 16:26:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:26:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 16:26:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1297 transitions. [2022-12-13 16:26:05,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4162387676508344 [2022-12-13 16:26:05,717 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1297 transitions. [2022-12-13 16:26:05,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1297 transitions. [2022-12-13 16:26:05,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:05,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1297 transitions. [2022-12-13 16:26:05,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 68.26315789473684) internal successors, (1297), 19 states have internal predecessors, (1297), 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 16:26:05,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:05,726 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:05,726 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 506 flow. Second operand 19 states and 1297 transitions. [2022-12-13 16:26:05,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1027 flow [2022-12-13 16:26:05,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 925 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-12-13 16:26:05,733 INFO L231 Difference]: Finished difference. Result has 88 places, 60 transitions, 493 flow [2022-12-13 16:26:05,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=493, PETRI_PLACES=88, PETRI_TRANSITIONS=60} [2022-12-13 16:26:05,739 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 68 predicate places. [2022-12-13 16:26:05,740 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 60 transitions, 493 flow [2022-12-13 16:26:05,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.0) internal successors, (1280), 20 states have internal predecessors, (1280), 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 16:26:05,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:05,740 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:05,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:26:05,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:05,942 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash -14876529, now seen corresponding path program 4 times [2022-12-13 16:26:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:05,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768101698] [2022-12-13 16:26:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:05,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:06,174 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 16:26:06,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:06,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768101698] [2022-12-13 16:26:06,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768101698] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:06,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093248500] [2022-12-13 16:26:06,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:26:06,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:06,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:06,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:06,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:26:06,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:26:06,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:06,370 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 16:26:06,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:06,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093248500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:06,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:06,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 16:26:06,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364745677] [2022-12-13 16:26:06,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:06,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:06,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:06,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:06,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 60 transitions, 493 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:06,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:06,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:06,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:06,996 INFO L130 PetriNetUnfolder]: 177/370 cut-off events. [2022-12-13 16:26:06,996 INFO L131 PetriNetUnfolder]: For 1331/1331 co-relation queries the response was YES. [2022-12-13 16:26:06,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1669 conditions, 370 events. 177/370 cut-off events. For 1331/1331 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1629 event pairs, 8 based on Foata normal form. 2/370 useless extension candidates. Maximal degree in co-relation 1639. Up to 163 conditions per place. [2022-12-13 16:26:06,998 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 53 selfloop transitions, 40 changer transitions 10/103 dead transitions. [2022-12-13 16:26:06,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 103 transitions, 901 flow [2022-12-13 16:26:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:26:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 16:26:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 917 transitions. [2022-12-13 16:26:07,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4301125703564728 [2022-12-13 16:26:07,003 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 917 transitions. [2022-12-13 16:26:07,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 917 transitions. [2022-12-13 16:26:07,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:07,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 917 transitions. [2022-12-13 16:26:07,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 70.53846153846153) internal successors, (917), 13 states have internal predecessors, (917), 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 16:26:07,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 164.0) internal successors, (2296), 14 states have internal predecessors, (2296), 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 16:26:07,006 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 164.0) internal successors, (2296), 14 states have internal predecessors, (2296), 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 16:26:07,006 INFO L175 Difference]: Start difference. First operand has 88 places, 60 transitions, 493 flow. Second operand 13 states and 917 transitions. [2022-12-13 16:26:07,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 103 transitions, 901 flow [2022-12-13 16:26:07,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 103 transitions, 789 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-12-13 16:26:07,011 INFO L231 Difference]: Finished difference. Result has 87 places, 69 transitions, 572 flow [2022-12-13 16:26:07,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=572, PETRI_PLACES=87, PETRI_TRANSITIONS=69} [2022-12-13 16:26:07,012 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 67 predicate places. [2022-12-13 16:26:07,012 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 69 transitions, 572 flow [2022-12-13 16:26:07,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:07,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:07,013 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:07,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:26:07,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:26:07,214 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash -90245411, now seen corresponding path program 5 times [2022-12-13 16:26:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:07,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909004366] [2022-12-13 16:26:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:07,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:07,376 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 16:26:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:07,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909004366] [2022-12-13 16:26:07,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909004366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:07,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123833669] [2022-12-13 16:26:07,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:26:07,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:07,378 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:07,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:26:07,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:07,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:07,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:07,537 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 16:26:07,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:07,673 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 16:26:07,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123833669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:07,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:07,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 16:26:07,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64637168] [2022-12-13 16:26:07,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:07,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:07,810 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:07,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 69 transitions, 572 flow. Second operand has 19 states, 19 states have (on average 67.05263157894737) internal successors, (1274), 19 states have internal predecessors, (1274), 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 16:26:07,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:07,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:07,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:08,513 INFO L130 PetriNetUnfolder]: 226/491 cut-off events. [2022-12-13 16:26:08,513 INFO L131 PetriNetUnfolder]: For 1507/1507 co-relation queries the response was YES. [2022-12-13 16:26:08,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 491 events. 226/491 cut-off events. For 1507/1507 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2515 event pairs, 6 based on Foata normal form. 4/491 useless extension candidates. Maximal degree in co-relation 2108. Up to 181 conditions per place. [2022-12-13 16:26:08,518 INFO L137 encePairwiseOnDemand]: 155/164 looper letters, 73 selfloop transitions, 52 changer transitions 25/150 dead transitions. [2022-12-13 16:26:08,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 150 transitions, 1256 flow [2022-12-13 16:26:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:26:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 16:26:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1344 transitions. [2022-12-13 16:26:08,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4313222079589217 [2022-12-13 16:26:08,521 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1344 transitions. [2022-12-13 16:26:08,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1344 transitions. [2022-12-13 16:26:08,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:08,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1344 transitions. [2022-12-13 16:26:08,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 70.73684210526316) internal successors, (1344), 19 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 16:26:08,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:08,526 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:08,526 INFO L175 Difference]: Start difference. First operand has 87 places, 69 transitions, 572 flow. Second operand 19 states and 1344 transitions. [2022-12-13 16:26:08,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 150 transitions, 1256 flow [2022-12-13 16:26:08,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 150 transitions, 1204 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-12-13 16:26:08,533 INFO L231 Difference]: Finished difference. Result has 106 places, 84 transitions, 827 flow [2022-12-13 16:26:08,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=827, PETRI_PLACES=106, PETRI_TRANSITIONS=84} [2022-12-13 16:26:08,533 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 86 predicate places. [2022-12-13 16:26:08,533 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 84 transitions, 827 flow [2022-12-13 16:26:08,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.05263157894737) internal successors, (1274), 19 states have internal predecessors, (1274), 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 16:26:08,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:08,534 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:08,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:08,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 16:26:08,736 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash -16065821, now seen corresponding path program 6 times [2022-12-13 16:26:08,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:08,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716567893] [2022-12-13 16:26:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:08,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:08,903 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 16:26:08,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:08,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716567893] [2022-12-13 16:26:08,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716567893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:08,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165069538] [2022-12-13 16:26:08,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:26:08,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:08,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:08,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:08,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:26:08,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 16:26:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:08,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:08,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:09,097 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 16:26:09,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:09,272 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 16:26:09,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165069538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:09,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:09,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 16:26:09,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498531533] [2022-12-13 16:26:09,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:09,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:09,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:09,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:09,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:09,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:09,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 84 transitions, 827 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:09,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:09,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:09,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:10,044 INFO L130 PetriNetUnfolder]: 211/447 cut-off events. [2022-12-13 16:26:10,045 INFO L131 PetriNetUnfolder]: For 2945/2945 co-relation queries the response was YES. [2022-12-13 16:26:10,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 447 events. 211/447 cut-off events. For 2945/2945 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2173 event pairs, 6 based on Foata normal form. 3/446 useless extension candidates. Maximal degree in co-relation 2362. Up to 183 conditions per place. [2022-12-13 16:26:10,047 INFO L137 encePairwiseOnDemand]: 155/164 looper letters, 61 selfloop transitions, 57 changer transitions 19/137 dead transitions. [2022-12-13 16:26:10,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 137 transitions, 1353 flow [2022-12-13 16:26:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:26:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 16:26:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1332 transitions. [2022-12-13 16:26:10,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4274711168164313 [2022-12-13 16:26:10,049 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1332 transitions. [2022-12-13 16:26:10,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1332 transitions. [2022-12-13 16:26:10,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:10,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1332 transitions. [2022-12-13 16:26:10,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 70.10526315789474) internal successors, (1332), 19 states have internal predecessors, (1332), 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 16:26:10,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:10,057 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:10,057 INFO L175 Difference]: Start difference. First operand has 106 places, 84 transitions, 827 flow. Second operand 19 states and 1332 transitions. [2022-12-13 16:26:10,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 137 transitions, 1353 flow [2022-12-13 16:26:10,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 137 transitions, 1264 flow, removed 24 selfloop flow, removed 10 redundant places. [2022-12-13 16:26:10,064 INFO L231 Difference]: Finished difference. Result has 112 places, 87 transitions, 927 flow [2022-12-13 16:26:10,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=927, PETRI_PLACES=112, PETRI_TRANSITIONS=87} [2022-12-13 16:26:10,065 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 92 predicate places. [2022-12-13 16:26:10,065 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 87 transitions, 927 flow [2022-12-13 16:26:10,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:10,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:10,065 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:10,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:26:10,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:10,267 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash -578989877, now seen corresponding path program 7 times [2022-12-13 16:26:10,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445973724] [2022-12-13 16:26:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:10,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:10,410 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 16:26:10,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445973724] [2022-12-13 16:26:10,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445973724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430627200] [2022-12-13 16:26:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:26:10,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:10,411 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:10,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:26:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:10,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:10,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:10,588 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 16:26:10,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:10,737 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 16:26:10,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430627200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:10,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:10,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 16:26:10,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455045582] [2022-12-13 16:26:10,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:10,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:10,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:10,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:10,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:10,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:10,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 87 transitions, 927 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:10,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:10,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:10,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:11,133 INFO L130 PetriNetUnfolder]: 211/442 cut-off events. [2022-12-13 16:26:11,133 INFO L131 PetriNetUnfolder]: For 2938/2938 co-relation queries the response was YES. [2022-12-13 16:26:11,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2498 conditions, 442 events. 211/442 cut-off events. For 2938/2938 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2109 event pairs, 7 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 2460. Up to 242 conditions per place. [2022-12-13 16:26:11,135 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 73 selfloop transitions, 32 changer transitions 10/115 dead transitions. [2022-12-13 16:26:11,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 115 transitions, 1292 flow [2022-12-13 16:26:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:26:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 16:26:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 770 transitions. [2022-12-13 16:26:11,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2022-12-13 16:26:11,137 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 770 transitions. [2022-12-13 16:26:11,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 770 transitions. [2022-12-13 16:26:11,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:11,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 770 transitions. [2022-12-13 16:26:11,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 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 16:26:11,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 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 16:26:11,139 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 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 16:26:11,139 INFO L175 Difference]: Start difference. First operand has 112 places, 87 transitions, 927 flow. Second operand 11 states and 770 transitions. [2022-12-13 16:26:11,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 115 transitions, 1292 flow [2022-12-13 16:26:11,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 115 transitions, 1113 flow, removed 22 selfloop flow, removed 16 redundant places. [2022-12-13 16:26:11,154 INFO L231 Difference]: Finished difference. Result has 104 places, 89 transitions, 850 flow [2022-12-13 16:26:11,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=850, PETRI_PLACES=104, PETRI_TRANSITIONS=89} [2022-12-13 16:26:11,155 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 84 predicate places. [2022-12-13 16:26:11,155 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 89 transitions, 850 flow [2022-12-13 16:26:11,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 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 16:26:11,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:11,156 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:11,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:26:11,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:11,358 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1157786141, now seen corresponding path program 8 times [2022-12-13 16:26:11,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:11,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928220201] [2022-12-13 16:26:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:11,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:11,533 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 16:26:11,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:11,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928220201] [2022-12-13 16:26:11,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928220201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:11,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130674442] [2022-12-13 16:26:11,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:26:11,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:11,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:11,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:11,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:26:11,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:11,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:11,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:11,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:11,721 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 16:26:11,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:11,830 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 16:26:11,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130674442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:11,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:11,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2022-12-13 16:26:11,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719748949] [2022-12-13 16:26:11,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:11,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:26:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:11,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:26:11,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:26:11,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 164 [2022-12-13 16:26:11,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 89 transitions, 850 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 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 16:26:11,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:11,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 164 [2022-12-13 16:26:11,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:12,195 INFO L130 PetriNetUnfolder]: 213/448 cut-off events. [2022-12-13 16:26:12,195 INFO L131 PetriNetUnfolder]: For 2452/2452 co-relation queries the response was YES. [2022-12-13 16:26:12,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 448 events. 213/448 cut-off events. For 2452/2452 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2154 event pairs, 9 based on Foata normal form. 2/446 useless extension candidates. Maximal degree in co-relation 2325. Up to 237 conditions per place. [2022-12-13 16:26:12,197 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 76 selfloop transitions, 37 changer transitions 10/123 dead transitions. [2022-12-13 16:26:12,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 123 transitions, 1291 flow [2022-12-13 16:26:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:26:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:26:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 806 transitions. [2022-12-13 16:26:12,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4095528455284553 [2022-12-13 16:26:12,198 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 806 transitions. [2022-12-13 16:26:12,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 806 transitions. [2022-12-13 16:26:12,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:12,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 806 transitions. [2022-12-13 16:26:12,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 67.16666666666667) internal successors, (806), 12 states have internal predecessors, (806), 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 16:26:12,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 164.0) internal successors, (2132), 13 states have internal predecessors, (2132), 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 16:26:12,201 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 164.0) internal successors, (2132), 13 states have internal predecessors, (2132), 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 16:26:12,201 INFO L175 Difference]: Start difference. First operand has 104 places, 89 transitions, 850 flow. Second operand 12 states and 806 transitions. [2022-12-13 16:26:12,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 123 transitions, 1291 flow [2022-12-13 16:26:12,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 123 transitions, 1245 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-12-13 16:26:12,211 INFO L231 Difference]: Finished difference. Result has 110 places, 96 transitions, 982 flow [2022-12-13 16:26:12,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=982, PETRI_PLACES=110, PETRI_TRANSITIONS=96} [2022-12-13 16:26:12,211 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 90 predicate places. [2022-12-13 16:26:12,211 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 96 transitions, 982 flow [2022-12-13 16:26:12,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 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 16:26:12,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:12,212 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:12,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:26:12,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:26:12,413 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:12,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1233155023, now seen corresponding path program 9 times [2022-12-13 16:26:12,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:12,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324724708] [2022-12-13 16:26:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:12,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:12,560 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 16:26:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324724708] [2022-12-13 16:26:12,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324724708] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:12,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71234007] [2022-12-13 16:26:12,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:26:12,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:12,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:12,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:12,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:26:12,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:26:12,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:12,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:12,736 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 16:26:12,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:12,903 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 16:26:12,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71234007] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:12,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:12,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 16:26:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442469825] [2022-12-13 16:26:12,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:12,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:12,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:13,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:13,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 96 transitions, 982 flow. Second operand has 19 states, 19 states have (on average 67.05263157894737) internal successors, (1274), 19 states have internal predecessors, (1274), 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 16:26:13,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:13,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:13,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:13,544 INFO L130 PetriNetUnfolder]: 227/496 cut-off events. [2022-12-13 16:26:13,544 INFO L131 PetriNetUnfolder]: For 3510/3510 co-relation queries the response was YES. [2022-12-13 16:26:13,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2754 conditions, 496 events. 227/496 cut-off events. For 3510/3510 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2533 event pairs, 7 based on Foata normal form. 2/494 useless extension candidates. Maximal degree in co-relation 2713. Up to 284 conditions per place. [2022-12-13 16:26:13,547 INFO L137 encePairwiseOnDemand]: 155/164 looper letters, 90 selfloop transitions, 46 changer transitions 10/146 dead transitions. [2022-12-13 16:26:13,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 146 transitions, 1570 flow [2022-12-13 16:26:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 16:26:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 16:26:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1058 transitions. [2022-12-13 16:26:13,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4300813008130081 [2022-12-13 16:26:13,548 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1058 transitions. [2022-12-13 16:26:13,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1058 transitions. [2022-12-13 16:26:13,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:13,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1058 transitions. [2022-12-13 16:26:13,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 70.53333333333333) internal successors, (1058), 15 states have internal predecessors, (1058), 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 16:26:13,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 164.0) internal successors, (2624), 16 states have internal predecessors, (2624), 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 16:26:13,550 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 164.0) internal successors, (2624), 16 states have internal predecessors, (2624), 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 16:26:13,550 INFO L175 Difference]: Start difference. First operand has 110 places, 96 transitions, 982 flow. Second operand 15 states and 1058 transitions. [2022-12-13 16:26:13,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 146 transitions, 1570 flow [2022-12-13 16:26:13,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 146 transitions, 1521 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-12-13 16:26:13,561 INFO L231 Difference]: Finished difference. Result has 121 places, 102 transitions, 1149 flow [2022-12-13 16:26:13,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1149, PETRI_PLACES=121, PETRI_TRANSITIONS=102} [2022-12-13 16:26:13,561 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 101 predicate places. [2022-12-13 16:26:13,561 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 102 transitions, 1149 flow [2022-12-13 16:26:13,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.05263157894737) internal successors, (1274), 19 states have internal predecessors, (1274), 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 16:26:13,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:13,562 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:13,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:26:13,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:13,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1158975433, now seen corresponding path program 10 times [2022-12-13 16:26:13,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:13,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579003982] [2022-12-13 16:26:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:13,913 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 16:26:13,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:13,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579003982] [2022-12-13 16:26:13,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579003982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:13,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877009452] [2022-12-13 16:26:13,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:26:13,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:13,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:13,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:13,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:26:13,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:26:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:13,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:13,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:14,083 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 16:26:14,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:14,206 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 16:26:14,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877009452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:14,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:14,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2022-12-13 16:26:14,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136658474] [2022-12-13 16:26:14,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:14,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:26:14,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:26:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:26:14,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 164 [2022-12-13 16:26:14,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 102 transitions, 1149 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 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 16:26:14,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:14,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 164 [2022-12-13 16:26:14,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:14,991 INFO L130 PetriNetUnfolder]: 221/485 cut-off events. [2022-12-13 16:26:14,991 INFO L131 PetriNetUnfolder]: For 4412/4412 co-relation queries the response was YES. [2022-12-13 16:26:14,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 485 events. 221/485 cut-off events. For 4412/4412 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2472 event pairs, 3 based on Foata normal form. 3/484 useless extension candidates. Maximal degree in co-relation 2801. Up to 286 conditions per place. [2022-12-13 16:26:14,994 INFO L137 encePairwiseOnDemand]: 155/164 looper letters, 93 selfloop transitions, 50 changer transitions 15/158 dead transitions. [2022-12-13 16:26:14,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 158 transitions, 1736 flow [2022-12-13 16:26:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:26:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 16:26:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1276 transitions. [2022-12-13 16:26:14,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40949935815147626 [2022-12-13 16:26:14,995 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1276 transitions. [2022-12-13 16:26:14,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1276 transitions. [2022-12-13 16:26:14,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:14,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1276 transitions. [2022-12-13 16:26:14,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 67.15789473684211) internal successors, (1276), 19 states have internal predecessors, (1276), 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 16:26:14,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:14,999 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:14,999 INFO L175 Difference]: Start difference. First operand has 121 places, 102 transitions, 1149 flow. Second operand 19 states and 1276 transitions. [2022-12-13 16:26:14,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 158 transitions, 1736 flow [2022-12-13 16:26:15,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 158 transitions, 1685 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-12-13 16:26:15,012 INFO L231 Difference]: Finished difference. Result has 129 places, 106 transitions, 1297 flow [2022-12-13 16:26:15,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1297, PETRI_PLACES=129, PETRI_TRANSITIONS=106} [2022-12-13 16:26:15,013 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 109 predicate places. [2022-12-13 16:26:15,013 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 106 transitions, 1297 flow [2022-12-13 16:26:15,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 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 16:26:15,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:15,013 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:15,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 16:26:15,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 16:26:15,214 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:15,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:15,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1414986171, now seen corresponding path program 1 times [2022-12-13 16:26:15,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:15,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226482634] [2022-12-13 16:26:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:15,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:15,351 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 16:26:15,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:15,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226482634] [2022-12-13 16:26:15,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226482634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:15,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317195879] [2022-12-13 16:26:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:15,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:15,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:15,352 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:15,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:26:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:15,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:15,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:15,485 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 16:26:15,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:15,595 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 16:26:15,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317195879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:15,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:15,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 16:26:15,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14911576] [2022-12-13 16:26:15,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:15,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 16:26:15,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 16:26:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:26:15,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:15,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 106 transitions, 1297 flow. Second operand has 18 states, 18 states have (on average 66.77777777777777) internal successors, (1202), 18 states have internal predecessors, (1202), 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 16:26:15,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:15,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:15,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:16,080 INFO L130 PetriNetUnfolder]: 246/526 cut-off events. [2022-12-13 16:26:16,081 INFO L131 PetriNetUnfolder]: For 5678/5678 co-relation queries the response was YES. [2022-12-13 16:26:16,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3342 conditions, 526 events. 246/526 cut-off events. For 5678/5678 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2688 event pairs, 18 based on Foata normal form. 3/525 useless extension candidates. Maximal degree in co-relation 3255. Up to 105 conditions per place. [2022-12-13 16:26:16,088 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 85 selfloop transitions, 49 changer transitions 32/166 dead transitions. [2022-12-13 16:26:16,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 166 transitions, 2012 flow [2022-12-13 16:26:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:26:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 16:26:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1002 transitions. [2022-12-13 16:26:16,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.436411149825784 [2022-12-13 16:26:16,091 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1002 transitions. [2022-12-13 16:26:16,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1002 transitions. [2022-12-13 16:26:16,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:16,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1002 transitions. [2022-12-13 16:26:16,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.57142857142857) internal successors, (1002), 14 states have internal predecessors, (1002), 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 16:26:16,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 164.0) internal successors, (2460), 15 states have internal predecessors, (2460), 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 16:26:16,095 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 164.0) internal successors, (2460), 15 states have internal predecessors, (2460), 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 16:26:16,095 INFO L175 Difference]: Start difference. First operand has 129 places, 106 transitions, 1297 flow. Second operand 14 states and 1002 transitions. [2022-12-13 16:26:16,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 166 transitions, 2012 flow [2022-12-13 16:26:16,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 166 transitions, 1668 flow, removed 99 selfloop flow, removed 16 redundant places. [2022-12-13 16:26:16,124 INFO L231 Difference]: Finished difference. Result has 129 places, 100 transitions, 1119 flow [2022-12-13 16:26:16,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1119, PETRI_PLACES=129, PETRI_TRANSITIONS=100} [2022-12-13 16:26:16,125 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 109 predicate places. [2022-12-13 16:26:16,125 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 100 transitions, 1119 flow [2022-12-13 16:26:16,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 66.77777777777777) internal successors, (1202), 18 states have internal predecessors, (1202), 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 16:26:16,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:16,126 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:16,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:26:16,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 16:26:16,327 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1815341729, now seen corresponding path program 2 times [2022-12-13 16:26:16,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:16,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461587451] [2022-12-13 16:26:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:16,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:16,487 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 16:26:16,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:16,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461587451] [2022-12-13 16:26:16,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461587451] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:16,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438481961] [2022-12-13 16:26:16,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:26:16,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:16,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:16,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:16,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:26:16,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:16,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:16,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:16,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:16,688 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 16:26:16,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:16,815 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 16:26:16,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438481961] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:16,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:16,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 16:26:16,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160394656] [2022-12-13 16:26:16,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:16,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:16,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:16,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:16,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:16,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 100 transitions, 1119 flow. Second operand has 19 states, 19 states have (on average 66.6842105263158) internal successors, (1267), 19 states have internal predecessors, (1267), 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 16:26:16,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:16,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:16,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:17,480 INFO L130 PetriNetUnfolder]: 260/557 cut-off events. [2022-12-13 16:26:17,481 INFO L131 PetriNetUnfolder]: For 4005/4005 co-relation queries the response was YES. [2022-12-13 16:26:17,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3145 conditions, 557 events. 260/557 cut-off events. For 4005/4005 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2875 event pairs, 16 based on Foata normal form. 2/559 useless extension candidates. Maximal degree in co-relation 3049. Up to 123 conditions per place. [2022-12-13 16:26:17,484 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 113 selfloop transitions, 64 changer transitions 11/188 dead transitions. [2022-12-13 16:26:17,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 188 transitions, 2009 flow [2022-12-13 16:26:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:26:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 16:26:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1353 transitions. [2022-12-13 16:26:17,486 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2022-12-13 16:26:17,486 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1353 transitions. [2022-12-13 16:26:17,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1353 transitions. [2022-12-13 16:26:17,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:17,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1353 transitions. [2022-12-13 16:26:17,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 71.21052631578948) internal successors, (1353), 19 states have internal predecessors, (1353), 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 16:26:17,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:17,489 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:17,489 INFO L175 Difference]: Start difference. First operand has 129 places, 100 transitions, 1119 flow. Second operand 19 states and 1353 transitions. [2022-12-13 16:26:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 188 transitions, 2009 flow [2022-12-13 16:26:17,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 188 transitions, 1827 flow, removed 40 selfloop flow, removed 13 redundant places. [2022-12-13 16:26:17,503 INFO L231 Difference]: Finished difference. Result has 135 places, 121 transitions, 1372 flow [2022-12-13 16:26:17,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1372, PETRI_PLACES=135, PETRI_TRANSITIONS=121} [2022-12-13 16:26:17,503 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 115 predicate places. [2022-12-13 16:26:17,503 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 121 transitions, 1372 flow [2022-12-13 16:26:17,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.6842105263158) internal successors, (1267), 19 states have internal predecessors, (1267), 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 16:26:17,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:17,504 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:17,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 16:26:17,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 16:26:17,705 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1225083399, now seen corresponding path program 3 times [2022-12-13 16:26:17,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:17,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421705550] [2022-12-13 16:26:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:17,861 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 16:26:17,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:17,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421705550] [2022-12-13 16:26:17,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421705550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:17,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975066404] [2022-12-13 16:26:17,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:26:17,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:17,862 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:17,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:26:17,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:26:17,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:18,027 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 16:26:18,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:18,123 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 16:26:18,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975066404] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:18,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:18,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-12-13 16:26:18,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890314913] [2022-12-13 16:26:18,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:18,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:26:18,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:18,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:26:18,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:26:18,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 164 [2022-12-13 16:26:18,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 121 transitions, 1372 flow. Second operand has 20 states, 20 states have (on average 63.85) internal successors, (1277), 20 states have internal predecessors, (1277), 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 16:26:18,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:18,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 164 [2022-12-13 16:26:18,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:18,788 INFO L130 PetriNetUnfolder]: 262/557 cut-off events. [2022-12-13 16:26:18,788 INFO L131 PetriNetUnfolder]: For 3924/3924 co-relation queries the response was YES. [2022-12-13 16:26:18,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3283 conditions, 557 events. 262/557 cut-off events. For 3924/3924 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2861 event pairs, 8 based on Foata normal form. 2/559 useless extension candidates. Maximal degree in co-relation 3183. Up to 127 conditions per place. [2022-12-13 16:26:18,791 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 114 selfloop transitions, 58 changer transitions 14/186 dead transitions. [2022-12-13 16:26:18,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 186 transitions, 2068 flow [2022-12-13 16:26:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 16:26:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 16:26:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1106 transitions. [2022-12-13 16:26:18,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4214939024390244 [2022-12-13 16:26:18,793 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1106 transitions. [2022-12-13 16:26:18,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1106 transitions. [2022-12-13 16:26:18,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:18,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1106 transitions. [2022-12-13 16:26:18,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 69.125) internal successors, (1106), 16 states have internal predecessors, (1106), 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 16:26:18,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 164.0) internal successors, (2788), 17 states have internal predecessors, (2788), 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 16:26:18,796 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 164.0) internal successors, (2788), 17 states have internal predecessors, (2788), 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 16:26:18,796 INFO L175 Difference]: Start difference. First operand has 135 places, 121 transitions, 1372 flow. Second operand 16 states and 1106 transitions. [2022-12-13 16:26:18,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 186 transitions, 2068 flow [2022-12-13 16:26:18,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 186 transitions, 1889 flow, removed 51 selfloop flow, removed 10 redundant places. [2022-12-13 16:26:18,813 INFO L231 Difference]: Finished difference. Result has 141 places, 120 transitions, 1351 flow [2022-12-13 16:26:18,813 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1351, PETRI_PLACES=141, PETRI_TRANSITIONS=120} [2022-12-13 16:26:18,813 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2022-12-13 16:26:18,813 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 120 transitions, 1351 flow [2022-12-13 16:26:18,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.85) internal successors, (1277), 20 states have internal predecessors, (1277), 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 16:26:18,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:18,814 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:18,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 16:26:19,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:19,015 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2077406257, now seen corresponding path program 4 times [2022-12-13 16:26:19,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:19,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828075914] [2022-12-13 16:26:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:19,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:19,128 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 16:26:19,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:19,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828075914] [2022-12-13 16:26:19,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828075914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:19,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824720226] [2022-12-13 16:26:19,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:26:19,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:19,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:19,129 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:19,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:26:19,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:26:19,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:19,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:19,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:19,298 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 16:26:19,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:19,407 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 16:26:19,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824720226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:19,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:19,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 16:26:19,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622105664] [2022-12-13 16:26:19,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:19,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:19,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:19,524 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:19,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 120 transitions, 1351 flow. Second operand has 19 states, 19 states have (on average 66.6842105263158) internal successors, (1267), 19 states have internal predecessors, (1267), 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 16:26:19,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:19,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:19,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:19,909 INFO L130 PetriNetUnfolder]: 255/531 cut-off events. [2022-12-13 16:26:19,909 INFO L131 PetriNetUnfolder]: For 3381/3381 co-relation queries the response was YES. [2022-12-13 16:26:19,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 531 events. 255/531 cut-off events. For 3381/3381 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2647 event pairs, 16 based on Foata normal form. 5/536 useless extension candidates. Maximal degree in co-relation 3001. Up to 125 conditions per place. [2022-12-13 16:26:19,912 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 95 selfloop transitions, 49 changer transitions 37/181 dead transitions. [2022-12-13 16:26:19,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 181 transitions, 1998 flow [2022-12-13 16:26:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 16:26:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 16:26:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1212 transitions. [2022-12-13 16:26:19,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4347202295552367 [2022-12-13 16:26:19,913 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1212 transitions. [2022-12-13 16:26:19,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1212 transitions. [2022-12-13 16:26:19,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:19,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1212 transitions. [2022-12-13 16:26:19,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 71.29411764705883) internal successors, (1212), 17 states have internal predecessors, (1212), 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 16:26:19,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 164.0) internal successors, (2952), 18 states have internal predecessors, (2952), 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 16:26:19,916 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 164.0) internal successors, (2952), 18 states have internal predecessors, (2952), 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 16:26:19,916 INFO L175 Difference]: Start difference. First operand has 141 places, 120 transitions, 1351 flow. Second operand 17 states and 1212 transitions. [2022-12-13 16:26:19,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 181 transitions, 1998 flow [2022-12-13 16:26:19,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 181 transitions, 1886 flow, removed 9 selfloop flow, removed 9 redundant places. [2022-12-13 16:26:19,930 INFO L231 Difference]: Finished difference. Result has 145 places, 106 transitions, 1155 flow [2022-12-13 16:26:19,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1155, PETRI_PLACES=145, PETRI_TRANSITIONS=106} [2022-12-13 16:26:19,930 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2022-12-13 16:26:19,931 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 106 transitions, 1155 flow [2022-12-13 16:26:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.6842105263158) internal successors, (1267), 19 states have internal predecessors, (1267), 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 16:26:19,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:19,931 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:19,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 16:26:20,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:20,132 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:20,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1284467093, now seen corresponding path program 5 times [2022-12-13 16:26:20,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:20,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623601238] [2022-12-13 16:26:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:20,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:20,260 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 16:26:20,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:20,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623601238] [2022-12-13 16:26:20,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623601238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:20,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874299717] [2022-12-13 16:26:20,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:26:20,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:20,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:20,262 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:20,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 16:26:20,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:20,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:20,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:20,449 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 16:26:20,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:20,567 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 16:26:20,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874299717] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:20,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:20,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 16:26:20,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071526116] [2022-12-13 16:26:20,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:20,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 16:26:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:20,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 16:26:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:26:20,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:20,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 106 transitions, 1155 flow. Second operand has 18 states, 18 states have (on average 66.61111111111111) internal successors, (1199), 18 states have internal predecessors, (1199), 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 16:26:20,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:20,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:20,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:21,159 INFO L130 PetriNetUnfolder]: 246/513 cut-off events. [2022-12-13 16:26:21,159 INFO L131 PetriNetUnfolder]: For 3938/3938 co-relation queries the response was YES. [2022-12-13 16:26:21,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2985 conditions, 513 events. 246/513 cut-off events. For 3938/3938 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2466 event pairs, 15 based on Foata normal form. 2/515 useless extension candidates. Maximal degree in co-relation 2938. Up to 293 conditions per place. [2022-12-13 16:26:21,164 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 119 selfloop transitions, 25 changer transitions 14/158 dead transitions. [2022-12-13 16:26:21,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 158 transitions, 1780 flow [2022-12-13 16:26:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:26:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 16:26:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 926 transitions. [2022-12-13 16:26:21,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4343339587242026 [2022-12-13 16:26:21,166 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 926 transitions. [2022-12-13 16:26:21,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 926 transitions. [2022-12-13 16:26:21,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:21,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 926 transitions. [2022-12-13 16:26:21,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.23076923076923) internal successors, (926), 13 states have internal predecessors, (926), 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 16:26:21,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 164.0) internal successors, (2296), 14 states have internal predecessors, (2296), 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 16:26:21,170 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 164.0) internal successors, (2296), 14 states have internal predecessors, (2296), 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 16:26:21,170 INFO L175 Difference]: Start difference. First operand has 145 places, 106 transitions, 1155 flow. Second operand 13 states and 926 transitions. [2022-12-13 16:26:21,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 158 transitions, 1780 flow [2022-12-13 16:26:21,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 158 transitions, 1548 flow, removed 39 selfloop flow, removed 18 redundant places. [2022-12-13 16:26:21,189 INFO L231 Difference]: Finished difference. Result has 135 places, 108 transitions, 1095 flow [2022-12-13 16:26:21,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1095, PETRI_PLACES=135, PETRI_TRANSITIONS=108} [2022-12-13 16:26:21,190 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 115 predicate places. [2022-12-13 16:26:21,190 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 108 transitions, 1095 flow [2022-12-13 16:26:21,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 66.61111111111111) internal successors, (1199), 18 states have internal predecessors, (1199), 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 16:26:21,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:21,190 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:21,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:21,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:21,391 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash 384286435, now seen corresponding path program 6 times [2022-12-13 16:26:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:21,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253513542] [2022-12-13 16:26:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:21,523 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 16:26:21,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:21,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253513542] [2022-12-13 16:26:21,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253513542] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:21,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122690795] [2022-12-13 16:26:21,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:26:21,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:21,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:21,524 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:21,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 16:26:21,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 16:26:21,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:26:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:21,700 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 16:26:21,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:21,803 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 16:26:21,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122690795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:21,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:21,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-12-13 16:26:21,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411074149] [2022-12-13 16:26:21,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:21,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:21,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:21,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:22,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 164 [2022-12-13 16:26:22,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 108 transitions, 1095 flow. Second operand has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 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 16:26:22,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:22,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 164 [2022-12-13 16:26:22,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:22,449 INFO L130 PetriNetUnfolder]: 239/489 cut-off events. [2022-12-13 16:26:22,449 INFO L131 PetriNetUnfolder]: For 3639/3639 co-relation queries the response was YES. [2022-12-13 16:26:22,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2718 conditions, 489 events. 239/489 cut-off events. For 3639/3639 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2278 event pairs, 15 based on Foata normal form. 3/492 useless extension candidates. Maximal degree in co-relation 2671. Up to 293 conditions per place. [2022-12-13 16:26:22,455 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 106 selfloop transitions, 22 changer transitions 27/155 dead transitions. [2022-12-13 16:26:22,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 155 transitions, 1639 flow [2022-12-13 16:26:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 16:26:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 16:26:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1073 transitions. [2022-12-13 16:26:22,457 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4089176829268293 [2022-12-13 16:26:22,457 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1073 transitions. [2022-12-13 16:26:22,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1073 transitions. [2022-12-13 16:26:22,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:22,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1073 transitions. [2022-12-13 16:26:22,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.0625) internal successors, (1073), 16 states have internal predecessors, (1073), 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 16:26:22,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 164.0) internal successors, (2788), 17 states have internal predecessors, (2788), 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 16:26:22,463 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 164.0) internal successors, (2788), 17 states have internal predecessors, (2788), 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 16:26:22,463 INFO L175 Difference]: Start difference. First operand has 135 places, 108 transitions, 1095 flow. Second operand 16 states and 1073 transitions. [2022-12-13 16:26:22,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 155 transitions, 1639 flow [2022-12-13 16:26:22,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 155 transitions, 1573 flow, removed 14 selfloop flow, removed 10 redundant places. [2022-12-13 16:26:22,482 INFO L231 Difference]: Finished difference. Result has 137 places, 103 transitions, 1036 flow [2022-12-13 16:26:22,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1036, PETRI_PLACES=137, PETRI_TRANSITIONS=103} [2022-12-13 16:26:22,483 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2022-12-13 16:26:22,483 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 103 transitions, 1036 flow [2022-12-13 16:26:22,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 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 16:26:22,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:22,483 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:22,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 16:26:22,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 16:26:22,684 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:22,685 INFO L85 PathProgramCache]: Analyzing trace with hash 112061231, now seen corresponding path program 11 times [2022-12-13 16:26:22,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:22,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761482627] [2022-12-13 16:26:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:22,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:22,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761482627] [2022-12-13 16:26:22,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761482627] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151847265] [2022-12-13 16:26:22,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:26:22,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:22,831 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:22,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 16:26:22,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:26:22,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:22,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:22,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:23,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:23,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151847265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:23,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:23,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 16:26:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015770954] [2022-12-13 16:26:23,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:23,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:26:23,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:23,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:26:23,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:26:23,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:23,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 103 transitions, 1036 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:23,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:23,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:23,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:24,203 INFO L130 PetriNetUnfolder]: 366/759 cut-off events. [2022-12-13 16:26:24,203 INFO L131 PetriNetUnfolder]: For 6906/6906 co-relation queries the response was YES. [2022-12-13 16:26:24,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4197 conditions, 759 events. 366/759 cut-off events. For 6906/6906 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4040 event pairs, 8 based on Foata normal form. 3/762 useless extension candidates. Maximal degree in co-relation 4149. Up to 183 conditions per place. [2022-12-13 16:26:24,207 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 98 selfloop transitions, 91 changer transitions 36/225 dead transitions. [2022-12-13 16:26:24,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 225 transitions, 2399 flow [2022-12-13 16:26:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 16:26:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 16:26:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1638 transitions. [2022-12-13 16:26:24,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4342523860021209 [2022-12-13 16:26:24,209 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1638 transitions. [2022-12-13 16:26:24,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1638 transitions. [2022-12-13 16:26:24,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:24,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1638 transitions. [2022-12-13 16:26:24,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 71.21739130434783) internal successors, (1638), 23 states have internal predecessors, (1638), 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 16:26:24,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 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 16:26:24,213 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 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 16:26:24,213 INFO L175 Difference]: Start difference. First operand has 137 places, 103 transitions, 1036 flow. Second operand 23 states and 1638 transitions. [2022-12-13 16:26:24,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 225 transitions, 2399 flow [2022-12-13 16:26:24,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 225 transitions, 2257 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-12-13 16:26:24,230 INFO L231 Difference]: Finished difference. Result has 146 places, 130 transitions, 1515 flow [2022-12-13 16:26:24,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1515, PETRI_PLACES=146, PETRI_TRANSITIONS=130} [2022-12-13 16:26:24,231 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 126 predicate places. [2022-12-13 16:26:24,231 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 130 transitions, 1515 flow [2022-12-13 16:26:24,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:24,231 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:24,231 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:24,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 16:26:24,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 16:26:24,432 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash -382403189, now seen corresponding path program 12 times [2022-12-13 16:26:24,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:24,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96035340] [2022-12-13 16:26:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:24,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:24,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96035340] [2022-12-13 16:26:24,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96035340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:24,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245974111] [2022-12-13 16:26:24,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:26:24,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:24,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:24,592 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:24,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 16:26:24,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:26:24,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:24,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:24,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:24,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245974111] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:24,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:24,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 16:26:24,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031228186] [2022-12-13 16:26:24,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:24,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:26:24,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:26:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:26:25,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:25,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 130 transitions, 1515 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:25,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:25,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:25,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:26,531 INFO L130 PetriNetUnfolder]: 462/1008 cut-off events. [2022-12-13 16:26:26,531 INFO L131 PetriNetUnfolder]: For 11045/11045 co-relation queries the response was YES. [2022-12-13 16:26:26,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5977 conditions, 1008 events. 462/1008 cut-off events. For 11045/11045 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6032 event pairs, 4 based on Foata normal form. 7/1015 useless extension candidates. Maximal degree in co-relation 5925. Up to 269 conditions per place. [2022-12-13 16:26:26,538 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 160 selfloop transitions, 147 changer transitions 26/333 dead transitions. [2022-12-13 16:26:26,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 333 transitions, 3785 flow [2022-12-13 16:26:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 16:26:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 16:26:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2902 transitions. [2022-12-13 16:26:26,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4315883402736466 [2022-12-13 16:26:26,543 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2902 transitions. [2022-12-13 16:26:26,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2902 transitions. [2022-12-13 16:26:26,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:26,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2902 transitions. [2022-12-13 16:26:26,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 70.78048780487805) internal successors, (2902), 41 states have internal predecessors, (2902), 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 16:26:26,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 164.0) internal successors, (6888), 42 states have internal predecessors, (6888), 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 16:26:26,551 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 164.0) internal successors, (6888), 42 states have internal predecessors, (6888), 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 16:26:26,551 INFO L175 Difference]: Start difference. First operand has 146 places, 130 transitions, 1515 flow. Second operand 41 states and 2902 transitions. [2022-12-13 16:26:26,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 333 transitions, 3785 flow [2022-12-13 16:26:26,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 333 transitions, 3204 flow, removed 156 selfloop flow, removed 18 redundant places. [2022-12-13 16:26:26,584 INFO L231 Difference]: Finished difference. Result has 172 places, 186 transitions, 2241 flow [2022-12-13 16:26:26,584 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2241, PETRI_PLACES=172, PETRI_TRANSITIONS=186} [2022-12-13 16:26:26,585 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 152 predicate places. [2022-12-13 16:26:26,585 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 186 transitions, 2241 flow [2022-12-13 16:26:26,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:26,585 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:26,585 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:26,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 16:26:26,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 16:26:26,786 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:26,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash -457966619, now seen corresponding path program 13 times [2022-12-13 16:26:26,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:26,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628288495] [2022-12-13 16:26:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:26,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:26,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628288495] [2022-12-13 16:26:26,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628288495] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548897785] [2022-12-13 16:26:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:26:26,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:26,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:26,954 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:26,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 16:26:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:27,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:27,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:27,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548897785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:27,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:27,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 16:26:27,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89018465] [2022-12-13 16:26:27,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:27,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:26:27,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:27,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:26:27,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:26:27,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:27,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 186 transitions, 2241 flow. Second operand has 24 states, 24 states have (on average 66.91666666666667) internal successors, (1606), 24 states have internal predecessors, (1606), 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 16:26:27,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:27,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:27,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:29,134 INFO L130 PetriNetUnfolder]: 543/1164 cut-off events. [2022-12-13 16:26:29,134 INFO L131 PetriNetUnfolder]: For 11987/11987 co-relation queries the response was YES. [2022-12-13 16:26:29,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6955 conditions, 1164 events. 543/1164 cut-off events. For 11987/11987 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7165 event pairs, 24 based on Foata normal form. 6/1170 useless extension candidates. Maximal degree in co-relation 6900. Up to 315 conditions per place. [2022-12-13 16:26:29,144 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 175 selfloop transitions, 141 changer transitions 46/362 dead transitions. [2022-12-13 16:26:29,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 362 transitions, 4146 flow [2022-12-13 16:26:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 16:26:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 16:26:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3095 transitions. [2022-12-13 16:26:29,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4289079822616408 [2022-12-13 16:26:29,147 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3095 transitions. [2022-12-13 16:26:29,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3095 transitions. [2022-12-13 16:26:29,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:29,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3095 transitions. [2022-12-13 16:26:29,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 70.3409090909091) internal successors, (3095), 44 states have internal predecessors, (3095), 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 16:26:29,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 164.0) internal successors, (7380), 45 states have internal predecessors, (7380), 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 16:26:29,154 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 164.0) internal successors, (7380), 45 states have internal predecessors, (7380), 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 16:26:29,154 INFO L175 Difference]: Start difference. First operand has 172 places, 186 transitions, 2241 flow. Second operand 44 states and 3095 transitions. [2022-12-13 16:26:29,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 362 transitions, 4146 flow [2022-12-13 16:26:29,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 362 transitions, 3608 flow, removed 216 selfloop flow, removed 16 redundant places. [2022-12-13 16:26:29,204 INFO L231 Difference]: Finished difference. Result has 212 places, 219 transitions, 2562 flow [2022-12-13 16:26:29,204 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2562, PETRI_PLACES=212, PETRI_TRANSITIONS=219} [2022-12-13 16:26:29,204 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2022-12-13 16:26:29,204 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 219 transitions, 2562 flow [2022-12-13 16:26:29,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.91666666666667) internal successors, (1606), 24 states have internal predecessors, (1606), 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 16:26:29,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:29,204 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:29,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 16:26:29,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 16:26:29,405 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:29,406 INFO L85 PathProgramCache]: Analyzing trace with hash -960010161, now seen corresponding path program 14 times [2022-12-13 16:26:29,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:29,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729851234] [2022-12-13 16:26:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:29,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:29,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:29,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729851234] [2022-12-13 16:26:29,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729851234] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:29,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076299098] [2022-12-13 16:26:29,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:26:29,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:29,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:29,559 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:29,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 16:26:29,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:29,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:29,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:29,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076299098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:29,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:29,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 16:26:29,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227457008] [2022-12-13 16:26:29,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:29,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:26:29,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:29,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:26:29,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:26:30,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:30,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 219 transitions, 2562 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:30,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:30,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:30,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:31,256 INFO L130 PetriNetUnfolder]: 610/1258 cut-off events. [2022-12-13 16:26:31,256 INFO L131 PetriNetUnfolder]: For 12288/12288 co-relation queries the response was YES. [2022-12-13 16:26:31,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7461 conditions, 1258 events. 610/1258 cut-off events. For 12288/12288 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7590 event pairs, 14 based on Foata normal form. 9/1267 useless extension candidates. Maximal degree in co-relation 7393. Up to 225 conditions per place. [2022-12-13 16:26:31,264 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 129 selfloop transitions, 158 changer transitions 81/368 dead transitions. [2022-12-13 16:26:31,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 368 transitions, 4422 flow [2022-12-13 16:26:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 16:26:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-13 16:26:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2658 transitions. [2022-12-13 16:26:31,266 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42650834403080873 [2022-12-13 16:26:31,267 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2658 transitions. [2022-12-13 16:26:31,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2658 transitions. [2022-12-13 16:26:31,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:31,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2658 transitions. [2022-12-13 16:26:31,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 69.94736842105263) internal successors, (2658), 38 states have internal predecessors, (2658), 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 16:26:31,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 164.0) internal successors, (6396), 39 states have internal predecessors, (6396), 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 16:26:31,280 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 164.0) internal successors, (6396), 39 states have internal predecessors, (6396), 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 16:26:31,280 INFO L175 Difference]: Start difference. First operand has 212 places, 219 transitions, 2562 flow. Second operand 38 states and 2658 transitions. [2022-12-13 16:26:31,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 368 transitions, 4422 flow [2022-12-13 16:26:31,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 368 transitions, 4182 flow, removed 51 selfloop flow, removed 20 redundant places. [2022-12-13 16:26:31,337 INFO L231 Difference]: Finished difference. Result has 224 places, 211 transitions, 2729 flow [2022-12-13 16:26:31,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2729, PETRI_PLACES=224, PETRI_TRANSITIONS=211} [2022-12-13 16:26:31,338 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 204 predicate places. [2022-12-13 16:26:31,338 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 211 transitions, 2729 flow [2022-12-13 16:26:31,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:31,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:31,338 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:31,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 16:26:31,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 16:26:31,539 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:31,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1799577883, now seen corresponding path program 15 times [2022-12-13 16:26:31,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:31,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063948994] [2022-12-13 16:26:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:31,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063948994] [2022-12-13 16:26:31,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063948994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830586512] [2022-12-13 16:26:31,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:26:31,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:31,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:31,757 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:31,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 16:26:31,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:26:31,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:31,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:31,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:31,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:32,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830586512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:32,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:32,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2022-12-13 16:26:32,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307422515] [2022-12-13 16:26:32,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:32,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 16:26:32,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 16:26:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-12-13 16:26:32,319 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 164 [2022-12-13 16:26:32,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 211 transitions, 2729 flow. Second operand has 25 states, 25 states have (on average 63.84) internal successors, (1596), 25 states have internal predecessors, (1596), 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 16:26:32,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:32,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 164 [2022-12-13 16:26:32,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:33,602 INFO L130 PetriNetUnfolder]: 642/1247 cut-off events. [2022-12-13 16:26:33,602 INFO L131 PetriNetUnfolder]: For 13939/13939 co-relation queries the response was YES. [2022-12-13 16:26:33,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8103 conditions, 1247 events. 642/1247 cut-off events. For 13939/13939 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7097 event pairs, 10 based on Foata normal form. 12/1259 useless extension candidates. Maximal degree in co-relation 8036. Up to 277 conditions per place. [2022-12-13 16:26:33,609 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 147 selfloop transitions, 176 changer transitions 31/354 dead transitions. [2022-12-13 16:26:33,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 354 transitions, 4524 flow [2022-12-13 16:26:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 16:26:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 16:26:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2483 transitions. [2022-12-13 16:26:33,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40919578114700067 [2022-12-13 16:26:33,611 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2483 transitions. [2022-12-13 16:26:33,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2483 transitions. [2022-12-13 16:26:33,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:33,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2483 transitions. [2022-12-13 16:26:33,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 67.10810810810811) internal successors, (2483), 37 states have internal predecessors, (2483), 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 16:26:33,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 164.0) internal successors, (6232), 38 states have internal predecessors, (6232), 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 16:26:33,617 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 164.0) internal successors, (6232), 38 states have internal predecessors, (6232), 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 16:26:33,617 INFO L175 Difference]: Start difference. First operand has 224 places, 211 transitions, 2729 flow. Second operand 37 states and 2483 transitions. [2022-12-13 16:26:33,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 354 transitions, 4524 flow [2022-12-13 16:26:33,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 354 transitions, 4013 flow, removed 124 selfloop flow, removed 26 redundant places. [2022-12-13 16:26:33,669 INFO L231 Difference]: Finished difference. Result has 221 places, 239 transitions, 3123 flow [2022-12-13 16:26:33,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3123, PETRI_PLACES=221, PETRI_TRANSITIONS=239} [2022-12-13 16:26:33,669 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 201 predicate places. [2022-12-13 16:26:33,669 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 239 transitions, 3123 flow [2022-12-13 16:26:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 63.84) internal successors, (1596), 25 states have internal predecessors, (1596), 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 16:26:33,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:33,670 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:33,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:33,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 16:26:33,871 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash -914667827, now seen corresponding path program 7 times [2022-12-13 16:26:33,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:33,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671217604] [2022-12-13 16:26:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:33,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:34,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:34,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671217604] [2022-12-13 16:26:34,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671217604] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:34,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025500595] [2022-12-13 16:26:34,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:26:34,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:34,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:34,029 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:34,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 16:26:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 16:26:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:34,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:34,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025500595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:34,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:34,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-12-13 16:26:34,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251849837] [2022-12-13 16:26:34,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:34,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:26:34,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:26:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:26:34,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:34,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 239 transitions, 3123 flow. Second operand has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 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 16:26:34,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:34,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:34,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:35,246 INFO L130 PetriNetUnfolder]: 673/1372 cut-off events. [2022-12-13 16:26:35,247 INFO L131 PetriNetUnfolder]: For 15527/15527 co-relation queries the response was YES. [2022-12-13 16:26:35,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9029 conditions, 1372 events. 673/1372 cut-off events. For 15527/15527 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8337 event pairs, 18 based on Foata normal form. 20/1392 useless extension candidates. Maximal degree in co-relation 8965. Up to 403 conditions per place. [2022-12-13 16:26:35,254 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 206 selfloop transitions, 118 changer transitions 29/353 dead transitions. [2022-12-13 16:26:35,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 353 transitions, 4841 flow [2022-12-13 16:26:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:26:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 16:26:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1421 transitions. [2022-12-13 16:26:35,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43323170731707317 [2022-12-13 16:26:35,256 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1421 transitions. [2022-12-13 16:26:35,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1421 transitions. [2022-12-13 16:26:35,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:35,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1421 transitions. [2022-12-13 16:26:35,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 71.05) internal successors, (1421), 20 states have internal predecessors, (1421), 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 16:26:35,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 164.0) internal successors, (3444), 21 states have internal predecessors, (3444), 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 16:26:35,266 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 164.0) internal successors, (3444), 21 states have internal predecessors, (3444), 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 16:26:35,266 INFO L175 Difference]: Start difference. First operand has 221 places, 239 transitions, 3123 flow. Second operand 20 states and 1421 transitions. [2022-12-13 16:26:35,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 353 transitions, 4841 flow [2022-12-13 16:26:35,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 353 transitions, 4544 flow, removed 69 selfloop flow, removed 29 redundant places. [2022-12-13 16:26:35,314 INFO L231 Difference]: Finished difference. Result has 210 places, 267 transitions, 3607 flow [2022-12-13 16:26:35,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3607, PETRI_PLACES=210, PETRI_TRANSITIONS=267} [2022-12-13 16:26:35,314 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 190 predicate places. [2022-12-13 16:26:35,314 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 267 transitions, 3607 flow [2022-12-13 16:26:35,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 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 16:26:35,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:35,315 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:35,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 16:26:35,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 16:26:35,516 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:35,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1990597969, now seen corresponding path program 8 times [2022-12-13 16:26:35,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:35,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784945293] [2022-12-13 16:26:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:35,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:35,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784945293] [2022-12-13 16:26:35,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784945293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632292800] [2022-12-13 16:26:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:26:35,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:35,693 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:35,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 16:26:35,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:35,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 16:26:35,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:35,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:35,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632292800] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:35,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:35,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-12-13 16:26:35,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25947542] [2022-12-13 16:26:35,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:35,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 16:26:35,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:35,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 16:26:35,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:26:36,113 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 164 [2022-12-13 16:26:36,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 267 transitions, 3607 flow. Second operand has 21 states, 21 states have (on average 63.857142857142854) internal successors, (1341), 21 states have internal predecessors, (1341), 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 16:26:36,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:36,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 164 [2022-12-13 16:26:36,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:36,850 INFO L130 PetriNetUnfolder]: 663/1321 cut-off events. [2022-12-13 16:26:36,850 INFO L131 PetriNetUnfolder]: For 18273/18273 co-relation queries the response was YES. [2022-12-13 16:26:36,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9283 conditions, 1321 events. 663/1321 cut-off events. For 18273/18273 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7760 event pairs, 16 based on Foata normal form. 13/1334 useless extension candidates. Maximal degree in co-relation 9220. Up to 436 conditions per place. [2022-12-13 16:26:36,858 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 195 selfloop transitions, 81 changer transitions 65/341 dead transitions. [2022-12-13 16:26:36,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 341 transitions, 4827 flow [2022-12-13 16:26:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:26:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 16:26:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1472 transitions. [2022-12-13 16:26:36,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2022-12-13 16:26:36,860 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1472 transitions. [2022-12-13 16:26:36,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1472 transitions. [2022-12-13 16:26:36,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:36,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1472 transitions. [2022-12-13 16:26:36,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.9090909090909) internal successors, (1472), 22 states have internal predecessors, (1472), 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 16:26:36,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 164.0) internal successors, (3772), 23 states have internal predecessors, (3772), 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 16:26:36,864 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 164.0) internal successors, (3772), 23 states have internal predecessors, (3772), 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 16:26:36,864 INFO L175 Difference]: Start difference. First operand has 210 places, 267 transitions, 3607 flow. Second operand 22 states and 1472 transitions. [2022-12-13 16:26:36,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 341 transitions, 4827 flow [2022-12-13 16:26:36,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 341 transitions, 4599 flow, removed 81 selfloop flow, removed 10 redundant places. [2022-12-13 16:26:36,935 INFO L231 Difference]: Finished difference. Result has 225 places, 241 transitions, 3177 flow [2022-12-13 16:26:36,935 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3177, PETRI_PLACES=225, PETRI_TRANSITIONS=241} [2022-12-13 16:26:36,936 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2022-12-13 16:26:36,936 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 241 transitions, 3177 flow [2022-12-13 16:26:36,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.857142857142854) internal successors, (1341), 21 states have internal predecessors, (1341), 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 16:26:36,936 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:36,936 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:36,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 16:26:37,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 16:26:37,137 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:37,137 INFO L85 PathProgramCache]: Analyzing trace with hash 632443147, now seen corresponding path program 16 times [2022-12-13 16:26:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:37,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728897135] [2022-12-13 16:26:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:37,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:37,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:37,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728897135] [2022-12-13 16:26:37,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728897135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:37,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758779530] [2022-12-13 16:26:37,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:26:37,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:37,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:37,241 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:37,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 16:26:37,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:26:37,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:37,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:37,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758779530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:37,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:37,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 16:26:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134032879] [2022-12-13 16:26:37,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:26:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:26:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:26:37,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:37,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 241 transitions, 3177 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:37,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:37,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:37,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:38,313 INFO L130 PetriNetUnfolder]: 531/1097 cut-off events. [2022-12-13 16:26:38,313 INFO L131 PetriNetUnfolder]: For 11212/11212 co-relation queries the response was YES. [2022-12-13 16:26:38,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7104 conditions, 1097 events. 531/1097 cut-off events. For 11212/11212 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6305 event pairs, 17 based on Foata normal form. 3/1100 useless extension candidates. Maximal degree in co-relation 7036. Up to 695 conditions per place. [2022-12-13 16:26:38,321 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 211 selfloop transitions, 31 changer transitions 29/271 dead transitions. [2022-12-13 16:26:38,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 271 transitions, 3835 flow [2022-12-13 16:26:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 16:26:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 16:26:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1034 transitions. [2022-12-13 16:26:38,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42032520325203254 [2022-12-13 16:26:38,329 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1034 transitions. [2022-12-13 16:26:38,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1034 transitions. [2022-12-13 16:26:38,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:38,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1034 transitions. [2022-12-13 16:26:38,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 68.93333333333334) internal successors, (1034), 15 states have internal predecessors, (1034), 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 16:26:38,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 164.0) internal successors, (2624), 16 states have internal predecessors, (2624), 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 16:26:38,333 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 164.0) internal successors, (2624), 16 states have internal predecessors, (2624), 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 16:26:38,333 INFO L175 Difference]: Start difference. First operand has 225 places, 241 transitions, 3177 flow. Second operand 15 states and 1034 transitions. [2022-12-13 16:26:38,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 271 transitions, 3835 flow [2022-12-13 16:26:38,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 271 transitions, 3628 flow, removed 34 selfloop flow, removed 23 redundant places. [2022-12-13 16:26:38,406 INFO L231 Difference]: Finished difference. Result has 207 places, 236 transitions, 2987 flow [2022-12-13 16:26:38,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2987, PETRI_PLACES=207, PETRI_TRANSITIONS=236} [2022-12-13 16:26:38,407 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 187 predicate places. [2022-12-13 16:26:38,407 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 236 transitions, 2987 flow [2022-12-13 16:26:38,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:38,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:38,407 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:38,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:38,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:38,609 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:38,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1539985373, now seen corresponding path program 17 times [2022-12-13 16:26:38,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:38,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658448310] [2022-12-13 16:26:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:38,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:38,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:38,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658448310] [2022-12-13 16:26:38,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658448310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:38,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963806623] [2022-12-13 16:26:38,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:26:38,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:38,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:38,804 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:38,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 16:26:38,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:26:38,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:38,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:39,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:39,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963806623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:39,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:39,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2022-12-13 16:26:39,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512788568] [2022-12-13 16:26:39,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:39,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 16:26:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:39,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 16:26:39,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-12-13 16:26:39,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:39,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 236 transitions, 2987 flow. Second operand has 25 states, 25 states have (on average 66.92) internal successors, (1673), 25 states have internal predecessors, (1673), 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 16:26:39,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:39,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:39,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:39,976 INFO L130 PetriNetUnfolder]: 530/1097 cut-off events. [2022-12-13 16:26:39,976 INFO L131 PetriNetUnfolder]: For 9232/9232 co-relation queries the response was YES. [2022-12-13 16:26:39,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6714 conditions, 1097 events. 530/1097 cut-off events. For 9232/9232 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6355 event pairs, 17 based on Foata normal form. 4/1101 useless extension candidates. Maximal degree in co-relation 6652. Up to 678 conditions per place. [2022-12-13 16:26:39,982 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 208 selfloop transitions, 38 changer transitions 33/279 dead transitions. [2022-12-13 16:26:39,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 279 transitions, 3740 flow [2022-12-13 16:26:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 16:26:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 16:26:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1442 transitions. [2022-12-13 16:26:39,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2022-12-13 16:26:39,991 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1442 transitions. [2022-12-13 16:26:39,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1442 transitions. [2022-12-13 16:26:39,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:39,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1442 transitions. [2022-12-13 16:26:39,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 68.66666666666667) internal successors, (1442), 21 states have internal predecessors, (1442), 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 16:26:39,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 164.0) internal successors, (3608), 22 states have internal predecessors, (3608), 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 16:26:39,996 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 164.0) internal successors, (3608), 22 states have internal predecessors, (3608), 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 16:26:39,996 INFO L175 Difference]: Start difference. First operand has 207 places, 236 transitions, 2987 flow. Second operand 21 states and 1442 transitions. [2022-12-13 16:26:39,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 279 transitions, 3740 flow [2022-12-13 16:26:40,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 279 transitions, 3654 flow, removed 14 selfloop flow, removed 16 redundant places. [2022-12-13 16:26:40,056 INFO L231 Difference]: Finished difference. Result has 207 places, 235 transitions, 3006 flow [2022-12-13 16:26:40,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3006, PETRI_PLACES=207, PETRI_TRANSITIONS=235} [2022-12-13 16:26:40,056 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 187 predicate places. [2022-12-13 16:26:40,057 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 235 transitions, 3006 flow [2022-12-13 16:26:40,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 66.92) internal successors, (1673), 25 states have internal predecessors, (1673), 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 16:26:40,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:40,057 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:40,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 16:26:40,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:40,258 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:40,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1612072311, now seen corresponding path program 18 times [2022-12-13 16:26:40,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:40,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910748512] [2022-12-13 16:26:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:40,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:40,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910748512] [2022-12-13 16:26:40,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910748512] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:40,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501525247] [2022-12-13 16:26:40,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:26:40,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:40,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:40,377 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:40,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 16:26:40,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:26:40,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:40,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:40,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:40,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:40,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501525247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:40,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:40,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 16:26:40,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726408784] [2022-12-13 16:26:40,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:40,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:26:40,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:26:40,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:26:41,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:41,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 235 transitions, 3006 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:41,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:41,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:41,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:41,855 INFO L130 PetriNetUnfolder]: 549/1139 cut-off events. [2022-12-13 16:26:41,856 INFO L131 PetriNetUnfolder]: For 10308/10308 co-relation queries the response was YES. [2022-12-13 16:26:41,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7183 conditions, 1139 events. 549/1139 cut-off events. For 10308/10308 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6709 event pairs, 17 based on Foata normal form. 5/1144 useless extension candidates. Maximal degree in co-relation 7123. Up to 632 conditions per place. [2022-12-13 16:26:41,861 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 222 selfloop transitions, 56 changer transitions 36/314 dead transitions. [2022-12-13 16:26:41,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 314 transitions, 4279 flow [2022-12-13 16:26:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 16:26:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 16:26:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1861 transitions. [2022-12-13 16:26:41,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4202800361336947 [2022-12-13 16:26:41,863 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1861 transitions. [2022-12-13 16:26:41,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1861 transitions. [2022-12-13 16:26:41,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:41,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1861 transitions. [2022-12-13 16:26:41,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 68.92592592592592) internal successors, (1861), 27 states have internal predecessors, (1861), 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 16:26:41,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 164.0) internal successors, (4592), 28 states have internal predecessors, (4592), 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 16:26:41,867 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 164.0) internal successors, (4592), 28 states have internal predecessors, (4592), 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 16:26:41,867 INFO L175 Difference]: Start difference. First operand has 207 places, 235 transitions, 3006 flow. Second operand 27 states and 1861 transitions. [2022-12-13 16:26:41,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 314 transitions, 4279 flow [2022-12-13 16:26:41,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 314 transitions, 4225 flow, removed 18 selfloop flow, removed 12 redundant places. [2022-12-13 16:26:41,923 INFO L231 Difference]: Finished difference. Result has 217 places, 245 transitions, 3377 flow [2022-12-13 16:26:41,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3377, PETRI_PLACES=217, PETRI_TRANSITIONS=245} [2022-12-13 16:26:41,924 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2022-12-13 16:26:41,924 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 245 transitions, 3377 flow [2022-12-13 16:26:41,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:41,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:41,924 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:41,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:42,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 16:26:42,125 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:42,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1574014967, now seen corresponding path program 19 times [2022-12-13 16:26:42,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:42,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107139308] [2022-12-13 16:26:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:42,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107139308] [2022-12-13 16:26:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107139308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614315363] [2022-12-13 16:26:42,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:26:42,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:42,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:42,288 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:42,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 16:26:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:42,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:42,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:42,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614315363] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:42,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:42,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-12-13 16:26:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386445605] [2022-12-13 16:26:42,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:42,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:26:42,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:26:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:26:42,893 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:42,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 245 transitions, 3377 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:42,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:42,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:42,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:44,156 INFO L130 PetriNetUnfolder]: 566/1178 cut-off events. [2022-12-13 16:26:44,156 INFO L131 PetriNetUnfolder]: For 14328/14328 co-relation queries the response was YES. [2022-12-13 16:26:44,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7925 conditions, 1178 events. 566/1178 cut-off events. For 14328/14328 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7039 event pairs, 17 based on Foata normal form. 5/1183 useless extension candidates. Maximal degree in co-relation 7862. Up to 644 conditions per place. [2022-12-13 16:26:44,162 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 240 selfloop transitions, 77 changer transitions 34/351 dead transitions. [2022-12-13 16:26:44,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 351 transitions, 4973 flow [2022-12-13 16:26:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 16:26:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 16:26:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2296 transitions. [2022-12-13 16:26:44,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2022-12-13 16:26:44,164 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2296 transitions. [2022-12-13 16:26:44,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2296 transitions. [2022-12-13 16:26:44,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:44,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2296 transitions. [2022-12-13 16:26:44,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 69.57575757575758) internal successors, (2296), 33 states have internal predecessors, (2296), 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 16:26:44,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 164.0) internal successors, (5576), 34 states have internal predecessors, (5576), 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 16:26:44,168 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 164.0) internal successors, (5576), 34 states have internal predecessors, (5576), 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 16:26:44,168 INFO L175 Difference]: Start difference. First operand has 217 places, 245 transitions, 3377 flow. Second operand 33 states and 2296 transitions. [2022-12-13 16:26:44,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 351 transitions, 4973 flow [2022-12-13 16:26:44,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 351 transitions, 4610 flow, removed 151 selfloop flow, removed 13 redundant places. [2022-12-13 16:26:44,228 INFO L231 Difference]: Finished difference. Result has 229 places, 265 transitions, 3665 flow [2022-12-13 16:26:44,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=3142, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3665, PETRI_PLACES=229, PETRI_TRANSITIONS=265} [2022-12-13 16:26:44,229 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 209 predicate places. [2022-12-13 16:26:44,229 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 265 transitions, 3665 flow [2022-12-13 16:26:44,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 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 16:26:44,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:44,229 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:44,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:44,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 16:26:44,430 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:44,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1498451537, now seen corresponding path program 20 times [2022-12-13 16:26:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:44,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501831296] [2022-12-13 16:26:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:44,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:44,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501831296] [2022-12-13 16:26:44,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501831296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:44,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19816194] [2022-12-13 16:26:44,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:26:44,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:44,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:44,599 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:44,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 16:26:44,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:44,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:44,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19816194] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:44,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:44,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2022-12-13 16:26:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004665306] [2022-12-13 16:26:44,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 16:26:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 16:26:44,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-12-13 16:26:45,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:45,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 265 transitions, 3665 flow. Second operand has 25 states, 25 states have (on average 66.92) internal successors, (1673), 25 states have internal predecessors, (1673), 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 16:26:45,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:45,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:45,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:46,485 INFO L130 PetriNetUnfolder]: 551/1125 cut-off events. [2022-12-13 16:26:46,486 INFO L131 PetriNetUnfolder]: For 12228/12228 co-relation queries the response was YES. [2022-12-13 16:26:46,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7553 conditions, 1125 events. 551/1125 cut-off events. For 12228/12228 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6501 event pairs, 17 based on Foata normal form. 3/1126 useless extension candidates. Maximal degree in co-relation 7490. Up to 644 conditions per place. [2022-12-13 16:26:46,492 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 217 selfloop transitions, 68 changer transitions 27/312 dead transitions. [2022-12-13 16:26:46,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 312 transitions, 4409 flow [2022-12-13 16:26:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:26:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 16:26:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1799 transitions. [2022-12-13 16:26:46,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4219043151969981 [2022-12-13 16:26:46,494 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1799 transitions. [2022-12-13 16:26:46,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1799 transitions. [2022-12-13 16:26:46,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:46,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1799 transitions. [2022-12-13 16:26:46,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 69.1923076923077) internal successors, (1799), 26 states have internal predecessors, (1799), 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 16:26:46,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 164.0) internal successors, (4428), 27 states have internal predecessors, (4428), 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 16:26:46,498 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 164.0) internal successors, (4428), 27 states have internal predecessors, (4428), 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 16:26:46,498 INFO L175 Difference]: Start difference. First operand has 229 places, 265 transitions, 3665 flow. Second operand 26 states and 1799 transitions. [2022-12-13 16:26:46,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 312 transitions, 4409 flow [2022-12-13 16:26:46,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 312 transitions, 4010 flow, removed 173 selfloop flow, removed 14 redundant places. [2022-12-13 16:26:46,546 INFO L231 Difference]: Finished difference. Result has 233 places, 258 transitions, 3335 flow [2022-12-13 16:26:46,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3335, PETRI_PLACES=233, PETRI_TRANSITIONS=258} [2022-12-13 16:26:46,547 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 213 predicate places. [2022-12-13 16:26:46,547 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 258 transitions, 3335 flow [2022-12-13 16:26:46,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 66.92) internal successors, (1673), 25 states have internal predecessors, (1673), 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 16:26:46,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:46,547 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:46,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:46,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 16:26:46,748 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:46,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1910416411, now seen corresponding path program 9 times [2022-12-13 16:26:46,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:46,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32827908] [2022-12-13 16:26:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:46,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:46,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:46,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32827908] [2022-12-13 16:26:46,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32827908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:46,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625628753] [2022-12-13 16:26:46,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:26:46,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:46,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:46,915 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:46,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 16:26:46,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:26:46,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:46,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 16:26:46,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:47,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:47,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625628753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:47,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:47,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2022-12-13 16:26:47,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453561409] [2022-12-13 16:26:47,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:47,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:26:47,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:26:47,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:26:47,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:47,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 258 transitions, 3335 flow. Second operand has 19 states, 19 states have (on average 66.6842105263158) internal successors, (1267), 19 states have internal predecessors, (1267), 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 16:26:47,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:47,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:47,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:47,861 INFO L130 PetriNetUnfolder]: 540/1098 cut-off events. [2022-12-13 16:26:47,862 INFO L131 PetriNetUnfolder]: For 10673/10673 co-relation queries the response was YES. [2022-12-13 16:26:47,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7123 conditions, 1098 events. 540/1098 cut-off events. For 10673/10673 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6256 event pairs, 17 based on Foata normal form. 3/1097 useless extension candidates. Maximal degree in co-relation 7062. Up to 870 conditions per place. [2022-12-13 16:26:47,867 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 237 selfloop transitions, 16 changer transitions 48/301 dead transitions. [2022-12-13 16:26:47,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 301 transitions, 4311 flow [2022-12-13 16:26:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 16:26:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 16:26:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1041 transitions. [2022-12-13 16:26:47,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42317073170731706 [2022-12-13 16:26:47,869 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1041 transitions. [2022-12-13 16:26:47,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1041 transitions. [2022-12-13 16:26:47,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:47,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1041 transitions. [2022-12-13 16:26:47,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 69.4) internal successors, (1041), 15 states have internal predecessors, (1041), 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 16:26:47,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 164.0) internal successors, (2624), 16 states have internal predecessors, (2624), 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 16:26:47,871 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 164.0) internal successors, (2624), 16 states have internal predecessors, (2624), 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 16:26:47,871 INFO L175 Difference]: Start difference. First operand has 233 places, 258 transitions, 3335 flow. Second operand 15 states and 1041 transitions. [2022-12-13 16:26:47,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 301 transitions, 4311 flow [2022-12-13 16:26:47,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 301 transitions, 4132 flow, removed 7 selfloop flow, removed 22 redundant places. [2022-12-13 16:26:47,908 INFO L231 Difference]: Finished difference. Result has 214 places, 237 transitions, 3046 flow [2022-12-13 16:26:47,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=3170, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3046, PETRI_PLACES=214, PETRI_TRANSITIONS=237} [2022-12-13 16:26:47,909 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 194 predicate places. [2022-12-13 16:26:47,909 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 237 transitions, 3046 flow [2022-12-13 16:26:47,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.6842105263158) internal successors, (1267), 19 states have internal predecessors, (1267), 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 16:26:47,909 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:47,909 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:47,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 16:26:48,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 16:26:48,110 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:48,111 INFO L85 PathProgramCache]: Analyzing trace with hash 656986573, now seen corresponding path program 10 times [2022-12-13 16:26:48,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:48,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388719691] [2022-12-13 16:26:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:48,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:48,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:48,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388719691] [2022-12-13 16:26:48,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388719691] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:48,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026032563] [2022-12-13 16:26:48,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:26:48,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:48,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:48,277 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:48,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 16:26:48,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:26:48,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:48,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:48,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:48,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:48,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026032563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:48,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:48,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-12-13 16:26:48,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368778475] [2022-12-13 16:26:48,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:48,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 16:26:48,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:48,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 16:26:48,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:26:48,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:48,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 237 transitions, 3046 flow. Second operand has 21 states, 21 states have (on average 66.71428571428571) internal successors, (1401), 21 states have internal predecessors, (1401), 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 16:26:48,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:48,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:48,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:49,539 INFO L130 PetriNetUnfolder]: 490/1003 cut-off events. [2022-12-13 16:26:49,539 INFO L131 PetriNetUnfolder]: For 8821/8821 co-relation queries the response was YES. [2022-12-13 16:26:49,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6435 conditions, 1003 events. 490/1003 cut-off events. For 8821/8821 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5622 event pairs, 2 based on Foata normal form. 14/1013 useless extension candidates. Maximal degree in co-relation 6374. Up to 294 conditions per place. [2022-12-13 16:26:49,544 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 161 selfloop transitions, 114 changer transitions 15/290 dead transitions. [2022-12-13 16:26:49,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 290 transitions, 3861 flow [2022-12-13 16:26:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:26:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 16:26:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1403 transitions. [2022-12-13 16:26:49,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277439024390244 [2022-12-13 16:26:49,546 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1403 transitions. [2022-12-13 16:26:49,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1403 transitions. [2022-12-13 16:26:49,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:49,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1403 transitions. [2022-12-13 16:26:49,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 70.15) internal successors, (1403), 20 states have internal predecessors, (1403), 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 16:26:49,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 164.0) internal successors, (3444), 21 states have internal predecessors, (3444), 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 16:26:49,549 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 164.0) internal successors, (3444), 21 states have internal predecessors, (3444), 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 16:26:49,549 INFO L175 Difference]: Start difference. First operand has 214 places, 237 transitions, 3046 flow. Second operand 20 states and 1403 transitions. [2022-12-13 16:26:49,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 290 transitions, 3861 flow [2022-12-13 16:26:49,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 290 transitions, 3781 flow, removed 27 selfloop flow, removed 11 redundant places. [2022-12-13 16:26:49,585 INFO L231 Difference]: Finished difference. Result has 209 places, 233 transitions, 3229 flow [2022-12-13 16:26:49,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3229, PETRI_PLACES=209, PETRI_TRANSITIONS=233} [2022-12-13 16:26:49,585 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2022-12-13 16:26:49,585 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 233 transitions, 3229 flow [2022-12-13 16:26:49,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 66.71428571428571) internal successors, (1401), 21 states have internal predecessors, (1401), 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 16:26:49,585 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:49,585 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:49,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 16:26:49,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:49,786 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2108838623, now seen corresponding path program 11 times [2022-12-13 16:26:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:49,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413656024] [2022-12-13 16:26:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:49,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:49,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413656024] [2022-12-13 16:26:49,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413656024] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316414203] [2022-12-13 16:26:49,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:26:49,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:49,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:49,924 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:49,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 16:26:49,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:26:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 16:26:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:50,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:50,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316414203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:50,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:50,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 22 [2022-12-13 16:26:50,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281098107] [2022-12-13 16:26:50,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:50,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:26:50,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:26:50,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-12-13 16:26:50,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:50,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 233 transitions, 3229 flow. Second operand has 24 states, 24 states have (on average 66.70833333333333) internal successors, (1601), 24 states have internal predecessors, (1601), 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 16:26:50,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:50,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:50,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:50,929 INFO L130 PetriNetUnfolder]: 476/960 cut-off events. [2022-12-13 16:26:50,929 INFO L131 PetriNetUnfolder]: For 10031/10031 co-relation queries the response was YES. [2022-12-13 16:26:50,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6608 conditions, 960 events. 476/960 cut-off events. For 10031/10031 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5261 event pairs, 1 based on Foata normal form. 9/959 useless extension candidates. Maximal degree in co-relation 6548. Up to 185 conditions per place. [2022-12-13 16:26:50,934 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 125 selfloop transitions, 83 changer transitions 107/315 dead transitions. [2022-12-13 16:26:50,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 315 transitions, 4847 flow [2022-12-13 16:26:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:26:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 16:26:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1387 transitions. [2022-12-13 16:26:50,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4228658536585366 [2022-12-13 16:26:50,935 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1387 transitions. [2022-12-13 16:26:50,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1387 transitions. [2022-12-13 16:26:50,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:50,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1387 transitions. [2022-12-13 16:26:50,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 69.35) internal successors, (1387), 20 states have internal predecessors, (1387), 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 16:26:50,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 164.0) internal successors, (3444), 21 states have internal predecessors, (3444), 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 16:26:50,940 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 164.0) internal successors, (3444), 21 states have internal predecessors, (3444), 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 16:26:50,940 INFO L175 Difference]: Start difference. First operand has 209 places, 233 transitions, 3229 flow. Second operand 20 states and 1387 transitions. [2022-12-13 16:26:50,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 315 transitions, 4847 flow [2022-12-13 16:26:50,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 315 transitions, 4633 flow, removed 22 selfloop flow, removed 16 redundant places. [2022-12-13 16:26:50,979 INFO L231 Difference]: Finished difference. Result has 215 places, 176 transitions, 2353 flow [2022-12-13 16:26:50,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2353, PETRI_PLACES=215, PETRI_TRANSITIONS=176} [2022-12-13 16:26:50,979 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 195 predicate places. [2022-12-13 16:26:50,979 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 176 transitions, 2353 flow [2022-12-13 16:26:50,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.70833333333333) internal successors, (1601), 24 states have internal predecessors, (1601), 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 16:26:50,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:50,980 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:50,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 16:26:51,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:51,181 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1135595767, now seen corresponding path program 12 times [2022-12-13 16:26:51,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:51,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115574909] [2022-12-13 16:26:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:51,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:51,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:51,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115574909] [2022-12-13 16:26:51,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115574909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:51,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266008224] [2022-12-13 16:26:51,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:26:51,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:51,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:51,348 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:51,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 16:26:51,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:26:51,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:51,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 16:26:51,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:51,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:51,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266008224] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:51,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:51,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-13 16:26:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542184405] [2022-12-13 16:26:51,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:51,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:26:51,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:51,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:26:51,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-12-13 16:26:51,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:51,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 176 transitions, 2353 flow. Second operand has 27 states, 27 states have (on average 66.55555555555556) internal successors, (1797), 27 states have internal predecessors, (1797), 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 16:26:51,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:51,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:51,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:52,824 INFO L130 PetriNetUnfolder]: 369/791 cut-off events. [2022-12-13 16:26:52,824 INFO L131 PetriNetUnfolder]: For 8397/8397 co-relation queries the response was YES. [2022-12-13 16:26:52,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 791 events. 369/791 cut-off events. For 8397/8397 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4310 event pairs, 1 based on Foata normal form. 7/788 useless extension candidates. Maximal degree in co-relation 5344. Up to 459 conditions per place. [2022-12-13 16:26:52,829 INFO L137 encePairwiseOnDemand]: 155/164 looper letters, 203 selfloop transitions, 61 changer transitions 27/291 dead transitions. [2022-12-13 16:26:52,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 291 transitions, 3990 flow [2022-12-13 16:26:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 16:26:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 16:26:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1755 transitions. [2022-12-13 16:26:52,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42804878048780487 [2022-12-13 16:26:52,831 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1755 transitions. [2022-12-13 16:26:52,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1755 transitions. [2022-12-13 16:26:52,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:52,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1755 transitions. [2022-12-13 16:26:52,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 70.2) internal successors, (1755), 25 states have internal predecessors, (1755), 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 16:26:52,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 164.0) internal successors, (4264), 26 states have internal predecessors, (4264), 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 16:26:52,834 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 164.0) internal successors, (4264), 26 states have internal predecessors, (4264), 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 16:26:52,834 INFO L175 Difference]: Start difference. First operand has 215 places, 176 transitions, 2353 flow. Second operand 25 states and 1755 transitions. [2022-12-13 16:26:52,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 291 transitions, 3990 flow [2022-12-13 16:26:52,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 291 transitions, 3463 flow, removed 152 selfloop flow, removed 29 redundant places. [2022-12-13 16:26:52,864 INFO L231 Difference]: Finished difference. Result has 202 places, 211 transitions, 2514 flow [2022-12-13 16:26:52,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2514, PETRI_PLACES=202, PETRI_TRANSITIONS=211} [2022-12-13 16:26:52,865 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2022-12-13 16:26:52,865 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 211 transitions, 2514 flow [2022-12-13 16:26:52,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 66.55555555555556) internal successors, (1797), 27 states have internal predecessors, (1797), 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 16:26:52,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:52,865 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:52,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:53,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 16:26:53,066 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:53,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1211159197, now seen corresponding path program 13 times [2022-12-13 16:26:53,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:53,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179438275] [2022-12-13 16:26:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:53,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179438275] [2022-12-13 16:26:53,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179438275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899714974] [2022-12-13 16:26:53,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:26:53,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:53,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:53,231 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:53,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 16:26:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:53,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:53,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:53,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:26:53,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899714974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:53,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:53,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2022-12-13 16:26:53,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701222630] [2022-12-13 16:26:53,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 16:26:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 16:26:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:26:53,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:53,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 211 transitions, 2514 flow. Second operand has 22 states, 22 states have (on average 66.68181818181819) internal successors, (1467), 22 states have internal predecessors, (1467), 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 16:26:53,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:53,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:53,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:54,134 INFO L130 PetriNetUnfolder]: 387/791 cut-off events. [2022-12-13 16:26:54,134 INFO L131 PetriNetUnfolder]: For 5681/5681 co-relation queries the response was YES. [2022-12-13 16:26:54,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5018 conditions, 791 events. 387/791 cut-off events. For 5681/5681 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4140 event pairs, 1 based on Foata normal form. 5/786 useless extension candidates. Maximal degree in co-relation 4964. Up to 303 conditions per place. [2022-12-13 16:26:54,138 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 180 selfloop transitions, 68 changer transitions 21/269 dead transitions. [2022-12-13 16:26:54,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 269 transitions, 3376 flow [2022-12-13 16:26:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:26:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 16:26:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1383 transitions. [2022-12-13 16:26:54,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4216463414634146 [2022-12-13 16:26:54,140 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1383 transitions. [2022-12-13 16:26:54,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1383 transitions. [2022-12-13 16:26:54,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:54,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1383 transitions. [2022-12-13 16:26:54,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 69.15) internal successors, (1383), 20 states have internal predecessors, (1383), 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 16:26:54,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 164.0) internal successors, (3444), 21 states have internal predecessors, (3444), 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 16:26:54,143 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 164.0) internal successors, (3444), 21 states have internal predecessors, (3444), 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 16:26:54,143 INFO L175 Difference]: Start difference. First operand has 202 places, 211 transitions, 2514 flow. Second operand 20 states and 1383 transitions. [2022-12-13 16:26:54,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 269 transitions, 3376 flow [2022-12-13 16:26:54,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 269 transitions, 3180 flow, removed 59 selfloop flow, removed 9 redundant places. [2022-12-13 16:26:54,166 INFO L231 Difference]: Finished difference. Result has 212 places, 212 transitions, 2417 flow [2022-12-13 16:26:54,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2417, PETRI_PLACES=212, PETRI_TRANSITIONS=212} [2022-12-13 16:26:54,166 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2022-12-13 16:26:54,166 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 212 transitions, 2417 flow [2022-12-13 16:26:54,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.68181818181819) internal successors, (1467), 22 states have internal predecessors, (1467), 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 16:26:54,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:54,167 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:54,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 16:26:54,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 16:26:54,368 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:54,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:54,369 INFO L85 PathProgramCache]: Analyzing trace with hash 944875829, now seen corresponding path program 14 times [2022-12-13 16:26:54,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:54,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472153768] [2022-12-13 16:26:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:54,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:54,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472153768] [2022-12-13 16:26:54,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472153768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521052842] [2022-12-13 16:26:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:26:54,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:54,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:54,483 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:54,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 16:26:54,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:54,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:26:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:54,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:26:54,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521052842] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:54,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:54,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2022-12-13 16:26:54,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946687507] [2022-12-13 16:26:54,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:54,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 16:26:54,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:54,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 16:26:54,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:26:54,946 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 164 [2022-12-13 16:26:54,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 212 transitions, 2417 flow. Second operand has 22 states, 22 states have (on average 66.5909090909091) internal successors, (1465), 22 states have internal predecessors, (1465), 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 16:26:54,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:54,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 164 [2022-12-13 16:26:54,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:55,485 INFO L130 PetriNetUnfolder]: 373/740 cut-off events. [2022-12-13 16:26:55,485 INFO L131 PetriNetUnfolder]: For 5548/5548 co-relation queries the response was YES. [2022-12-13 16:26:55,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4748 conditions, 740 events. 373/740 cut-off events. For 5548/5548 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3723 event pairs, 3 based on Foata normal form. 6/734 useless extension candidates. Maximal degree in co-relation 4694. Up to 586 conditions per place. [2022-12-13 16:26:55,490 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 179 selfloop transitions, 4 changer transitions 66/249 dead transitions. [2022-12-13 16:26:55,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 249 transitions, 3174 flow [2022-12-13 16:26:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 16:26:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 16:26:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1107 transitions. [2022-12-13 16:26:55,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.421875 [2022-12-13 16:26:55,491 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1107 transitions. [2022-12-13 16:26:55,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1107 transitions. [2022-12-13 16:26:55,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:55,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1107 transitions. [2022-12-13 16:26:55,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 69.1875) internal successors, (1107), 16 states have internal predecessors, (1107), 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 16:26:55,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 164.0) internal successors, (2788), 17 states have internal predecessors, (2788), 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 16:26:55,493 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 164.0) internal successors, (2788), 17 states have internal predecessors, (2788), 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 16:26:55,493 INFO L175 Difference]: Start difference. First operand has 212 places, 212 transitions, 2417 flow. Second operand 16 states and 1107 transitions. [2022-12-13 16:26:55,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 249 transitions, 3174 flow [2022-12-13 16:26:55,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 249 transitions, 2986 flow, removed 10 selfloop flow, removed 18 redundant places. [2022-12-13 16:26:55,513 INFO L231 Difference]: Finished difference. Result has 204 places, 179 transitions, 1900 flow [2022-12-13 16:26:55,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1900, PETRI_PLACES=204, PETRI_TRANSITIONS=179} [2022-12-13 16:26:55,513 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2022-12-13 16:26:55,514 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 179 transitions, 1900 flow [2022-12-13 16:26:55,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.5909090909091) internal successors, (1465), 22 states have internal predecessors, (1465), 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 16:26:55,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:55,514 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:55,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:55,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 16:26:55,715 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 16:26:55,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:55,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1187201755, now seen corresponding path program 15 times [2022-12-13 16:26:55,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:55,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959665274] [2022-12-13 16:26:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:55,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:55,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959665274] [2022-12-13 16:26:55,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959665274] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:55,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599932177] [2022-12-13 16:26:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:26:55,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:55,858 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:55,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 16:26:55,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:26:55,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:55,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:26:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:56,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:56,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599932177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:56,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:56,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 21 [2022-12-13 16:26:56,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738466556] [2022-12-13 16:26:56,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:56,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 16:26:56,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 16:26:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-12-13 16:26:56,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 164 [2022-12-13 16:26:56,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 179 transitions, 1900 flow. Second operand has 23 states, 23 states have (on average 64.04347826086956) internal successors, (1473), 23 states have internal predecessors, (1473), 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 16:26:56,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:56,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 164 [2022-12-13 16:26:56,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:56,933 INFO L130 PetriNetUnfolder]: 317/615 cut-off events. [2022-12-13 16:26:56,933 INFO L131 PetriNetUnfolder]: For 4321/4321 co-relation queries the response was YES. [2022-12-13 16:26:56,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3869 conditions, 615 events. 317/615 cut-off events. For 4321/4321 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2871 event pairs, 0 based on Foata normal form. 5/620 useless extension candidates. Maximal degree in co-relation 3816. Up to 372 conditions per place. [2022-12-13 16:26:56,936 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 0 selfloop transitions, 0 changer transitions 215/215 dead transitions. [2022-12-13 16:26:56,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 215 transitions, 2557 flow [2022-12-13 16:26:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:26:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 16:26:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1245 transitions. [2022-12-13 16:26:56,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3995507060333761 [2022-12-13 16:26:56,938 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1245 transitions. [2022-12-13 16:26:56,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1245 transitions. [2022-12-13 16:26:56,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:56,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1245 transitions. [2022-12-13 16:26:56,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.52631578947368) internal successors, (1245), 19 states have internal predecessors, (1245), 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 16:26:56,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:56,942 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 164.0) internal successors, (3280), 20 states have internal predecessors, (3280), 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 16:26:56,942 INFO L175 Difference]: Start difference. First operand has 204 places, 179 transitions, 1900 flow. Second operand 19 states and 1245 transitions. [2022-12-13 16:26:56,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 215 transitions, 2557 flow [2022-12-13 16:26:56,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 215 transitions, 2483 flow, removed 17 selfloop flow, removed 15 redundant places. [2022-12-13 16:26:56,964 INFO L231 Difference]: Finished difference. Result has 170 places, 0 transitions, 0 flow [2022-12-13 16:26:56,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=0, PETRI_PLACES=170, PETRI_TRANSITIONS=0} [2022-12-13 16:26:56,964 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 150 predicate places. [2022-12-13 16:26:56,965 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 0 transitions, 0 flow [2022-12-13 16:26:56,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.04347826086956) internal successors, (1473), 23 states have internal predecessors, (1473), 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 16:26:56,966 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-13 16:26:56,967 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-13 16:26:56,967 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-13 16:26:56,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:57,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 16:26:57,169 INFO L445 BasicCegarLoop]: Path program histogram: [20, 15, 6] [2022-12-13 16:26:57,179 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 16:26:57,179 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 16:26:57,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 04:26:57 BasicIcfg [2022-12-13 16:26:57,190 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 16:26:57,191 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 16:26:57,192 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 16:26:57,192 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 16:26:57,193 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:25:56" (3/4) ... [2022-12-13 16:26:57,200 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 16:26:57,208 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-12-13 16:26:57,208 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-12-13 16:26:57,214 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-12-13 16:26:57,214 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-13 16:26:57,214 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 16:26:57,214 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 16:26:57,240 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 16:26:57,240 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 16:26:57,241 INFO L158 Benchmark]: Toolchain (without parser) took 61550.22ms. Allocated memory was 119.5MB in the beginning and 371.2MB in the end (delta: 251.7MB). Free memory was 82.3MB in the beginning and 133.2MB in the end (delta: -50.9MB). Peak memory consumption was 201.5MB. Max. memory is 16.1GB. [2022-12-13 16:26:57,241 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 16:26:57,241 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.10ms. Allocated memory is still 119.5MB. Free memory was 82.3MB in the beginning and 71.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 16:26:57,241 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.52ms. Allocated memory is still 119.5MB. Free memory was 71.0MB in the beginning and 69.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:26:57,241 INFO L158 Benchmark]: Boogie Preprocessor took 17.10ms. Allocated memory is still 119.5MB. Free memory was 69.2MB in the beginning and 68.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:26:57,241 INFO L158 Benchmark]: RCFGBuilder took 294.99ms. Allocated memory is still 119.5MB. Free memory was 68.0MB in the beginning and 53.7MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 16:26:57,242 INFO L158 Benchmark]: TraceAbstraction took 60996.85ms. Allocated memory was 119.5MB in the beginning and 371.2MB in the end (delta: 251.7MB). Free memory was 52.9MB in the beginning and 135.9MB in the end (delta: -82.9MB). Peak memory consumption was 170.1MB. Max. memory is 16.1GB. [2022-12-13 16:26:57,242 INFO L158 Benchmark]: Witness Printer took 49.19ms. Allocated memory is still 371.2MB. Free memory was 135.9MB in the beginning and 133.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:26:57,243 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.10ms. Allocated memory is still 119.5MB. Free memory was 82.3MB in the beginning and 71.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.52ms. Allocated memory is still 119.5MB. Free memory was 71.0MB in the beginning and 69.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.10ms. Allocated memory is still 119.5MB. Free memory was 69.2MB in the beginning and 68.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 294.99ms. Allocated memory is still 119.5MB. Free memory was 68.0MB in the beginning and 53.7MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 60996.85ms. Allocated memory was 119.5MB in the beginning and 371.2MB in the end (delta: 251.7MB). Free memory was 52.9MB in the beginning and 135.9MB in the end (delta: -82.9MB). Peak memory consumption was 170.1MB. Max. memory is 16.1GB. * Witness Printer took 49.19ms. Allocated memory is still 371.2MB. Free memory was 135.9MB in the beginning and 133.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 79 PlacesBefore, 20 PlacesAfterwards, 78 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 75 TotalNumberOfCompositions, 570 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 552, independent: 548, independent conditional: 0, independent unconditional: 548, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 273, independent: 271, independent conditional: 0, independent unconditional: 271, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 552, independent: 277, independent conditional: 0, independent unconditional: 277, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 273, unknown conditional: 0, unknown unconditional: 273] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 104 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 60.9s, OverallIterations: 41, TraceHistogramMax: 3, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 32.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9782 SdHoareTripleChecker+Valid, 15.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9239 mSDsluCounter, 5765 SdHoareTripleChecker+Invalid, 13.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5539 mSDsCounter, 1062 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34676 IncrementalHoareTripleChecker+Invalid, 35738 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1062 mSolverCounterUnsat, 226 mSDtfsCounter, 34676 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1850 GetRequests, 550 SyntacticMatches, 53 SemanticMatches, 1247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12642 ImplicationChecksByTransitivity, 18.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3665occurred in iteration=33, InterpolantAutomatonStates: 786, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 15.8s InterpolantComputationTime, 1160 NumberOfCodeBlocks, 1160 NumberOfCodeBlocksAsserted, 113 NumberOfCheckSat, 1590 ConstructedInterpolants, 0 QuantifiedInterpolants, 21387 SizeOfPredicates, 144 NumberOfNonLiveVariables, 4410 ConjunctsInSsa, 883 ConjunctsInUnsatCore, 111 InterpolantComputations, 6 PerfectInterpolantSequences, 18/405 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 16:26:57,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230096be-9c48-4f97-be6d-7e4f99da4838/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE