./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/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_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/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_fb4ff3e4-2c8a-4043-b935-b9291a179a94/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 ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --- 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 21:20:58,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:20:58,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:20:58,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:20:58,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:20:58,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:20:58,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:20:58,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:20:58,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:20:58,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:20:58,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:20:58,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:20:58,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:20:58,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:20:58,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:20:58,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:20:58,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:20:58,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:20:58,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:20:58,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:20:58,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:20:58,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:20:58,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:20:58,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:20:58,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:20:58,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:20:58,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:20:58,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:20:58,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:20:58,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:20:58,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:20:58,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:20:58,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:20:58,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:20:58,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:20:58,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:20:58,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:20:58,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:20:58,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:20:58,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:20:58,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:20:58,155 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:20:58,179 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:20:58,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:20:58,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:20:58,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:20:58,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:20:58,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:20:58,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:20:58,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:20:58,182 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:20:58,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:20:58,182 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:20:58,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:20:58,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:20:58,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:20:58,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:20:58,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:20:58,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:20:58,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:20:58,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:20:58,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:20:58,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:20:58,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:20:58,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:20:58,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:20:58,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:20:58,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:20:58,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:20:58,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:20:58,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:20:58,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:20:58,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:20:58,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:20:58,186 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:20:58,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:20:58,187 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:20:58,187 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_fb4ff3e4-2c8a-4043-b935-b9291a179a94/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 [2022-12-13 21:20:58,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:20:58,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:20:58,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:20:58,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:20:58,411 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:20:58,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-12-13 21:21:01,037 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:21:01,168 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:21:01,168 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-12-13 21:21:01,173 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/data/355384f6a/993b0586fae84c0a85793c3b44e86c2a/FLAG6be16f8f5 [2022-12-13 21:21:01,183 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/data/355384f6a/993b0586fae84c0a85793c3b44e86c2a [2022-12-13 21:21:01,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:21:01,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:21:01,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:21:01,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:21:01,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:21:01,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187f9783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01, skipping insertion in model container [2022-12-13 21:21:01,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:21:01,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:21:01,331 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:21:01,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:21:01,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:21:01,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:21:01,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:21:01,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:21:01,338 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:21:01,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:21:01,345 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_fb4ff3e4-2c8a-4043-b935-b9291a179a94/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-12-13 21:21:01,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:21:01,357 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:21:01,367 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:21:01,368 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:21:01,368 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:21:01,369 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:21:01,369 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:21:01,370 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:21:01,370 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:21:01,371 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:21:01,375 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_fb4ff3e4-2c8a-4043-b935-b9291a179a94/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-12-13 21:21:01,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:21:01,388 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:21:01,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01 WrapperNode [2022-12-13 21:21:01,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:21:01,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:21:01,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:21:01,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:21:01,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,423 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-12-13 21:21:01,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:21:01,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:21:01,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:21:01,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:21:01,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,442 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:21:01,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:21:01,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:21:01,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:21:01,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (1/1) ... [2022-12-13 21:21:01,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:21:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:01,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:21:01,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:21:01,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:21:01,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 21:21:01,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 21:21:01,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 21:21:01,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 21:21:01,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 21:21:01,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 21:21:01,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 21:21:01,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 21:21:01,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:21:01,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:21:01,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:21:01,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 21:21:01,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 21:21:01,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:21:01,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:21:01,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:21:01,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:21:01,524 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 21:21:01,618 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:21:01,620 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:21:01,849 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:21:01,925 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:21:01,925 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 21:21:01,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:21:01 BoogieIcfgContainer [2022-12-13 21:21:01,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:21:01,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:21:01,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:21:01,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:21:01,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:21:01" (1/3) ... [2022-12-13 21:21:01,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddab119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:21:01, skipping insertion in model container [2022-12-13 21:21:01,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:21:01" (2/3) ... [2022-12-13 21:21:01,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddab119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:21:01, skipping insertion in model container [2022-12-13 21:21:01,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:21:01" (3/3) ... [2022-12-13 21:21:01,935 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-12-13 21:21:01,942 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 21:21:01,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:21:01,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:21:01,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:21:01,999 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 21:21:02,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 294 flow [2022-12-13 21:21:02,082 INFO L130 PetriNetUnfolder]: 10/127 cut-off events. [2022-12-13 21:21:02,082 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 21:21:02,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 127 events. 10/127 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2022-12-13 21:21:02,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 131 transitions, 294 flow [2022-12-13 21:21:02,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 114 transitions, 252 flow [2022-12-13 21:21:02,092 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:21:02,100 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 114 transitions, 252 flow [2022-12-13 21:21:02,102 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 114 transitions, 252 flow [2022-12-13 21:21:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 114 transitions, 252 flow [2022-12-13 21:21:02,127 INFO L130 PetriNetUnfolder]: 10/114 cut-off events. [2022-12-13 21:21:02,127 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 21:21:02,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 114 events. 10/114 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2022-12-13 21:21:02,129 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2022-12-13 21:21:05,807 INFO L134 LiptonReduction]: Checked pairs total: 1470 [2022-12-13 21:21:05,807 INFO L136 LiptonReduction]: Total number of compositions: 100 [2022-12-13 21:21:05,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:21:05,822 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;@33e77a86, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:21:05,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 21:21:05,829 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2022-12-13 21:21:05,829 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 21:21:05,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:05,830 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:05,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash 576351568, now seen corresponding path program 1 times [2022-12-13 21:21:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:05,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573814362] [2022-12-13 21:21:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:05,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:06,208 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 21:21:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:06,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573814362] [2022-12-13 21:21:06,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573814362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:21:06,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:21:06,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:21:06,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514860650] [2022-12-13 21:21:06,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:06,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:21:06,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:06,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:21:06,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:21:06,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 231 [2022-12-13 21:21:06,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:06,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 231 [2022-12-13 21:21:06,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:06,367 INFO L130 PetriNetUnfolder]: 431/611 cut-off events. [2022-12-13 21:21:06,367 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2022-12-13 21:21:06,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 611 events. 431/611 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1714 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 928. Up to 405 conditions per place. [2022-12-13 21:21:06,372 INFO L137 encePairwiseOnDemand]: 225/231 looper letters, 39 selfloop transitions, 3 changer transitions 3/45 dead transitions. [2022-12-13 21:21:06,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 225 flow [2022-12-13 21:21:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:21:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:21:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2022-12-13 21:21:06,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5497835497835498 [2022-12-13 21:21:06,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2022-12-13 21:21:06,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2022-12-13 21:21:06,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:06,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2022-12-13 21:21:06,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,403 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 381 transitions. [2022-12-13 21:21:06,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 225 flow [2022-12-13 21:21:06,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 195 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 21:21:06,408 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 81 flow [2022-12-13 21:21:06,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2022-12-13 21:21:06,413 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2022-12-13 21:21:06,414 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 81 flow [2022-12-13 21:21:06,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:06,414 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:06,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:21:06,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1779504650, now seen corresponding path program 1 times [2022-12-13 21:21:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:06,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197821831] [2022-12-13 21:21:06,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:06,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:06,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197821831] [2022-12-13 21:21:06,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197821831] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:21:06,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:21:06,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:21:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787674416] [2022-12-13 21:21:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:06,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:06,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:06,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:06,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:21:06,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2022-12-13 21:21:06,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:06,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2022-12-13 21:21:06,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:06,808 INFO L130 PetriNetUnfolder]: 487/709 cut-off events. [2022-12-13 21:21:06,808 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-12-13 21:21:06,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 709 events. 487/709 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2217 event pairs, 45 based on Foata normal form. 24/733 useless extension candidates. Maximal degree in co-relation 584. Up to 369 conditions per place. [2022-12-13 21:21:06,812 INFO L137 encePairwiseOnDemand]: 226/231 looper letters, 55 selfloop transitions, 5 changer transitions 14/74 dead transitions. [2022-12-13 21:21:06,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 74 transitions, 349 flow [2022-12-13 21:21:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:21:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:21:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 600 transitions. [2022-12-13 21:21:06,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2022-12-13 21:21:06,816 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 600 transitions. [2022-12-13 21:21:06,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 600 transitions. [2022-12-13 21:21:06,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:06,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 600 transitions. [2022-12-13 21:21:06,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,822 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,822 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 81 flow. Second operand 5 states and 600 transitions. [2022-12-13 21:21:06,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 74 transitions, 349 flow [2022-12-13 21:21:06,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 74 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:21:06,824 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 102 flow [2022-12-13 21:21:06,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2022-12-13 21:21:06,825 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2022-12-13 21:21:06,825 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 102 flow [2022-12-13 21:21:06,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:06,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:06,826 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:06,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:21:06,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1991102208, now seen corresponding path program 1 times [2022-12-13 21:21:06,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:06,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265070193] [2022-12-13 21:21:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:06,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:06,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:06,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265070193] [2022-12-13 21:21:06,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265070193] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:21:06,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:21:06,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:21:06,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362810633] [2022-12-13 21:21:06,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:06,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:21:06,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:06,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:21:06,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:21:07,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 231 [2022-12-13 21:21:07,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:07,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 231 [2022-12-13 21:21:07,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:07,172 INFO L130 PetriNetUnfolder]: 617/887 cut-off events. [2022-12-13 21:21:07,172 INFO L131 PetriNetUnfolder]: For 461/461 co-relation queries the response was YES. [2022-12-13 21:21:07,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2356 conditions, 887 events. 617/887 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2757 event pairs, 119 based on Foata normal form. 38/925 useless extension candidates. Maximal degree in co-relation 812. Up to 507 conditions per place. [2022-12-13 21:21:07,179 INFO L137 encePairwiseOnDemand]: 226/231 looper letters, 55 selfloop transitions, 7 changer transitions 1/63 dead transitions. [2022-12-13 21:21:07,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 63 transitions, 334 flow [2022-12-13 21:21:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2022-12-13 21:21:07,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5010822510822511 [2022-12-13 21:21:07,181 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2022-12-13 21:21:07,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2022-12-13 21:21:07,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:07,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2022-12-13 21:21:07,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,183 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 102 flow. Second operand 4 states and 463 transitions. [2022-12-13 21:21:07,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 63 transitions, 334 flow [2022-12-13 21:21:07,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 63 transitions, 325 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:21:07,185 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 144 flow [2022-12-13 21:21:07,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2022-12-13 21:21:07,185 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2022-12-13 21:21:07,186 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 144 flow [2022-12-13 21:21:07,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:07,186 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:07,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:21:07,186 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash 578225274, now seen corresponding path program 2 times [2022-12-13 21:21:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:07,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315050950] [2022-12-13 21:21:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:07,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:07,311 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 21:21:07,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:07,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315050950] [2022-12-13 21:21:07,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315050950] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:07,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709238321] [2022-12-13 21:21:07,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:21:07,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:07,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:07,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:07,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:21:07,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:21:07,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:07,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 21:21:07,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:07,516 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 21:21:07,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:07,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709238321] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:07,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:21:07,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-12-13 21:21:07,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624829111] [2022-12-13 21:21:07,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:07,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:07,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:07,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:07,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:21:07,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 231 [2022-12-13 21:21:07,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:07,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 231 [2022-12-13 21:21:07,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:07,789 INFO L130 PetriNetUnfolder]: 955/1369 cut-off events. [2022-12-13 21:21:07,789 INFO L131 PetriNetUnfolder]: For 1217/1217 co-relation queries the response was YES. [2022-12-13 21:21:07,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4206 conditions, 1369 events. 955/1369 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4873 event pairs, 173 based on Foata normal form. 36/1393 useless extension candidates. Maximal degree in co-relation 2265. Up to 631 conditions per place. [2022-12-13 21:21:07,794 INFO L137 encePairwiseOnDemand]: 226/231 looper letters, 65 selfloop transitions, 8 changer transitions 2/75 dead transitions. [2022-12-13 21:21:07,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 75 transitions, 444 flow [2022-12-13 21:21:07,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2022-12-13 21:21:07,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5140692640692641 [2022-12-13 21:21:07,796 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2022-12-13 21:21:07,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2022-12-13 21:21:07,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:07,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2022-12-13 21:21:07,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,798 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,798 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 144 flow. Second operand 4 states and 475 transitions. [2022-12-13 21:21:07,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 75 transitions, 444 flow [2022-12-13 21:21:07,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 75 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:21:07,801 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 184 flow [2022-12-13 21:21:07,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2022-12-13 21:21:07,802 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2022-12-13 21:21:07,802 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 184 flow [2022-12-13 21:21:07,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:07,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:07,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:07,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:21:08,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:08,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:08,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:08,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1882410432, now seen corresponding path program 3 times [2022-12-13 21:21:08,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:08,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034910211] [2022-12-13 21:21:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:08,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:08,145 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 21:21:08,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:08,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034910211] [2022-12-13 21:21:08,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034910211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:08,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786995901] [2022-12-13 21:21:08,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:21:08,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:08,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:08,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:08,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:21:08,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:21:08,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:08,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 21:21:08,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:08,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:21:08,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786995901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:21:08,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:21:08,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 21:21:08,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403759273] [2022-12-13 21:21:08,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:08,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:08,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:08,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:08,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:21:08,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 231 [2022-12-13 21:21:08,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:08,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:08,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 231 [2022-12-13 21:21:08,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:08,553 INFO L130 PetriNetUnfolder]: 921/1319 cut-off events. [2022-12-13 21:21:08,553 INFO L131 PetriNetUnfolder]: For 2211/2211 co-relation queries the response was YES. [2022-12-13 21:21:08,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4461 conditions, 1319 events. 921/1319 cut-off events. For 2211/2211 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4503 event pairs, 292 based on Foata normal form. 10/1329 useless extension candidates. Maximal degree in co-relation 2477. Up to 1243 conditions per place. [2022-12-13 21:21:08,561 INFO L137 encePairwiseOnDemand]: 227/231 looper letters, 46 selfloop transitions, 6 changer transitions 12/64 dead transitions. [2022-12-13 21:21:08,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 407 flow [2022-12-13 21:21:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2022-12-13 21:21:08,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5205627705627706 [2022-12-13 21:21:08,564 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2022-12-13 21:21:08,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2022-12-13 21:21:08,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:08,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2022-12-13 21:21:08,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:08,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:08,568 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:08,568 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 184 flow. Second operand 4 states and 481 transitions. [2022-12-13 21:21:08,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 407 flow [2022-12-13 21:21:08,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 407 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:21:08,572 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 213 flow [2022-12-13 21:21:08,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2022-12-13 21:21:08,573 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2022-12-13 21:21:08,573 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 213 flow [2022-12-13 21:21:08,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:08,573 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:08,573 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:08,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:21:08,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:08,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:08,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash 242159806, now seen corresponding path program 4 times [2022-12-13 21:21:08,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:08,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059585256] [2022-12-13 21:21:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:08,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:08,924 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 21:21:08,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059585256] [2022-12-13 21:21:08,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059585256] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558615534] [2022-12-13 21:21:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:21:08,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:08,926 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:08,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:21:08,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:21:08,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:08,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 21:21:08,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:09,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:21:09,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558615534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:21:09,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:21:09,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 21:21:09,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054500311] [2022-12-13 21:21:09,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:09,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:09,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:09,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:21:09,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 231 [2022-12-13 21:21:09,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:09,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 231 [2022-12-13 21:21:09,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:09,267 INFO L130 PetriNetUnfolder]: 837/1193 cut-off events. [2022-12-13 21:21:09,267 INFO L131 PetriNetUnfolder]: For 2082/2082 co-relation queries the response was YES. [2022-12-13 21:21:09,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4233 conditions, 1193 events. 837/1193 cut-off events. For 2082/2082 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3941 event pairs, 169 based on Foata normal form. 4/1197 useless extension candidates. Maximal degree in co-relation 2370. Up to 965 conditions per place. [2022-12-13 21:21:09,275 INFO L137 encePairwiseOnDemand]: 227/231 looper letters, 45 selfloop transitions, 4 changer transitions 14/63 dead transitions. [2022-12-13 21:21:09,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 63 transitions, 421 flow [2022-12-13 21:21:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 478 transitions. [2022-12-13 21:21:09,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5173160173160173 [2022-12-13 21:21:09,277 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 478 transitions. [2022-12-13 21:21:09,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 478 transitions. [2022-12-13 21:21:09,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:09,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 478 transitions. [2022-12-13 21:21:09,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,281 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,281 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 213 flow. Second operand 4 states and 478 transitions. [2022-12-13 21:21:09,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 63 transitions, 421 flow [2022-12-13 21:21:09,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:21:09,285 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 199 flow [2022-12-13 21:21:09,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2022-12-13 21:21:09,286 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2022-12-13 21:21:09,286 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 199 flow [2022-12-13 21:21:09,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:09,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:09,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:21:09,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:09,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash 897820548, now seen corresponding path program 2 times [2022-12-13 21:21:09,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:09,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099636661] [2022-12-13 21:21:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:09,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:09,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:09,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099636661] [2022-12-13 21:21:09,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099636661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:21:09,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:21:09,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:21:09,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675573519] [2022-12-13 21:21:09,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:09,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:09,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:21:09,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2022-12-13 21:21:09,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:09,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2022-12-13 21:21:09,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:09,795 INFO L130 PetriNetUnfolder]: 915/1290 cut-off events. [2022-12-13 21:21:09,796 INFO L131 PetriNetUnfolder]: For 3014/3014 co-relation queries the response was YES. [2022-12-13 21:21:09,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4630 conditions, 1290 events. 915/1290 cut-off events. For 3014/3014 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4332 event pairs, 215 based on Foata normal form. 26/1316 useless extension candidates. Maximal degree in co-relation 2682. Up to 1131 conditions per place. [2022-12-13 21:21:09,800 INFO L137 encePairwiseOnDemand]: 227/231 looper letters, 44 selfloop transitions, 4 changer transitions 16/64 dead transitions. [2022-12-13 21:21:09,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 64 transitions, 441 flow [2022-12-13 21:21:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 473 transitions. [2022-12-13 21:21:09,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2022-12-13 21:21:09,802 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 473 transitions. [2022-12-13 21:21:09,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 473 transitions. [2022-12-13 21:21:09,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:09,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 473 transitions. [2022-12-13 21:21:09,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,804 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,804 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 199 flow. Second operand 4 states and 473 transitions. [2022-12-13 21:21:09,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 64 transitions, 441 flow [2022-12-13 21:21:09,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 428 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 21:21:09,806 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 204 flow [2022-12-13 21:21:09,807 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2022-12-13 21:21:09,807 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2022-12-13 21:21:09,807 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 204 flow [2022-12-13 21:21:09,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:09,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:09,807 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:09,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 21:21:09,808 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1204332286, now seen corresponding path program 3 times [2022-12-13 21:21:09,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:09,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36458106] [2022-12-13 21:21:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:09,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:09,913 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 21:21:09,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:09,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36458106] [2022-12-13 21:21:09,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36458106] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:09,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045996763] [2022-12-13 21:21:09,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:21:09,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:09,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:09,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:09,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:21:09,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:21:09,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 21:21:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:10,064 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 21:21:10,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:10,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045996763] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:10,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:21:10,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-12-13 21:21:10,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637362730] [2022-12-13 21:21:10,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:10,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:21:10,126 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 231 [2022-12-13 21:21:10,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:10,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:10,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 231 [2022-12-13 21:21:10,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:10,260 INFO L130 PetriNetUnfolder]: 767/1060 cut-off events. [2022-12-13 21:21:10,260 INFO L131 PetriNetUnfolder]: For 2893/2893 co-relation queries the response was YES. [2022-12-13 21:21:10,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4231 conditions, 1060 events. 767/1060 cut-off events. For 2893/2893 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3262 event pairs, 155 based on Foata normal form. 40/1100 useless extension candidates. Maximal degree in co-relation 3967. Up to 667 conditions per place. [2022-12-13 21:21:10,267 INFO L137 encePairwiseOnDemand]: 226/231 looper letters, 58 selfloop transitions, 7 changer transitions 2/67 dead transitions. [2022-12-13 21:21:10,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 462 flow [2022-12-13 21:21:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2022-12-13 21:21:10,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5043290043290043 [2022-12-13 21:21:10,269 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2022-12-13 21:21:10,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2022-12-13 21:21:10,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:10,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2022-12-13 21:21:10,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:10,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:10,273 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:10,273 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 204 flow. Second operand 4 states and 466 transitions. [2022-12-13 21:21:10,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 462 flow [2022-12-13 21:21:10,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 67 transitions, 447 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 21:21:10,280 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 227 flow [2022-12-13 21:21:10,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2022-12-13 21:21:10,281 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2022-12-13 21:21:10,281 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 227 flow [2022-12-13 21:21:10,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:10,281 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:10,281 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:10,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:21:10,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:10,483 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1412444088, now seen corresponding path program 1 times [2022-12-13 21:21:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:10,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30552609] [2022-12-13 21:21:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:10,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:10,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30552609] [2022-12-13 21:21:10,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30552609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987060331] [2022-12-13 21:21:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:10,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:10,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:10,703 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:10,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:21:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:10,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 21:21:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:10,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:21:10,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987060331] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:10,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:21:10,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-12-13 21:21:10,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732557244] [2022-12-13 21:21:10,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:10,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:10,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:10,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:21:10,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 231 [2022-12-13 21:21:10,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:10,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:10,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 231 [2022-12-13 21:21:10,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:11,159 INFO L130 PetriNetUnfolder]: 1568/2223 cut-off events. [2022-12-13 21:21:11,159 INFO L131 PetriNetUnfolder]: For 5659/5659 co-relation queries the response was YES. [2022-12-13 21:21:11,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8892 conditions, 2223 events. 1568/2223 cut-off events. For 5659/5659 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8522 event pairs, 280 based on Foata normal form. 68/2291 useless extension candidates. Maximal degree in co-relation 6879. Up to 1033 conditions per place. [2022-12-13 21:21:11,174 INFO L137 encePairwiseOnDemand]: 226/231 looper letters, 78 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2022-12-13 21:21:11,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 87 transitions, 640 flow [2022-12-13 21:21:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2022-12-13 21:21:11,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2022-12-13 21:21:11,176 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2022-12-13 21:21:11,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2022-12-13 21:21:11,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:11,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2022-12-13 21:21:11,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:11,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:11,179 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:11,180 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 227 flow. Second operand 4 states and 476 transitions. [2022-12-13 21:21:11,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 87 transitions, 640 flow [2022-12-13 21:21:11,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 87 transitions, 610 flow, removed 15 selfloop flow, removed 1 redundant places. [2022-12-13 21:21:11,199 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 308 flow [2022-12-13 21:21:11,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2022-12-13 21:21:11,199 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2022-12-13 21:21:11,200 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 308 flow [2022-12-13 21:21:11,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:11,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:11,200 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:11,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 21:21:11,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 21:21:11,401 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash 470928364, now seen corresponding path program 2 times [2022-12-13 21:21:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190161076] [2022-12-13 21:21:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:11,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:11,505 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 21:21:11,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:11,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190161076] [2022-12-13 21:21:11,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190161076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:11,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961684118] [2022-12-13 21:21:11,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:21:11,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:11,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:11,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:11,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:21:11,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:21:11,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:11,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 21:21:11,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:21:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:21:11,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961684118] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:11,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:21:11,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-12-13 21:21:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494999807] [2022-12-13 21:21:11,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:11,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:21:11,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 231 [2022-12-13 21:21:11,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 308 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:11,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:11,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 231 [2022-12-13 21:21:11,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:12,072 INFO L130 PetriNetUnfolder]: 2952/4231 cut-off events. [2022-12-13 21:21:12,072 INFO L131 PetriNetUnfolder]: For 12301/12301 co-relation queries the response was YES. [2022-12-13 21:21:12,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17214 conditions, 4231 events. 2952/4231 cut-off events. For 12301/12301 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18883 event pairs, 374 based on Foata normal form. 222/4453 useless extension candidates. Maximal degree in co-relation 7685. Up to 2061 conditions per place. [2022-12-13 21:21:12,095 INFO L137 encePairwiseOnDemand]: 226/231 looper letters, 84 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2022-12-13 21:21:12,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 95 transitions, 813 flow [2022-12-13 21:21:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2022-12-13 21:21:12,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5086580086580087 [2022-12-13 21:21:12,097 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2022-12-13 21:21:12,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2022-12-13 21:21:12,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:12,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2022-12-13 21:21:12,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:12,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:12,099 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:12,099 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 308 flow. Second operand 4 states and 470 transitions. [2022-12-13 21:21:12,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 95 transitions, 813 flow [2022-12-13 21:21:12,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 95 transitions, 813 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:21:12,104 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 416 flow [2022-12-13 21:21:12,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2022-12-13 21:21:12,104 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2022-12-13 21:21:12,105 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 416 flow [2022-12-13 21:21:12,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:12,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:12,105 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:12,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:21:12,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:12,307 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash -347793366, now seen corresponding path program 1 times [2022-12-13 21:21:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:12,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862771226] [2022-12-13 21:21:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:12,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:21:12,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:12,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862771226] [2022-12-13 21:21:12,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862771226] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:21:12,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:21:12,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:21:12,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700255443] [2022-12-13 21:21:12,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:21:12,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:21:12,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2022-12-13 21:21:12,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 416 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:12,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:12,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2022-12-13 21:21:12,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:12,885 INFO L130 PetriNetUnfolder]: 2580/3633 cut-off events. [2022-12-13 21:21:12,885 INFO L131 PetriNetUnfolder]: For 15196/15196 co-relation queries the response was YES. [2022-12-13 21:21:12,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16232 conditions, 3633 events. 2580/3633 cut-off events. For 15196/15196 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14820 event pairs, 1022 based on Foata normal form. 16/3649 useless extension candidates. Maximal degree in co-relation 8267. Up to 3529 conditions per place. [2022-12-13 21:21:12,899 INFO L137 encePairwiseOnDemand]: 227/231 looper letters, 57 selfloop transitions, 5 changer transitions 9/71 dead transitions. [2022-12-13 21:21:12,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 668 flow [2022-12-13 21:21:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 467 transitions. [2022-12-13 21:21:12,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5054112554112554 [2022-12-13 21:21:12,900 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 467 transitions. [2022-12-13 21:21:12,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 467 transitions. [2022-12-13 21:21:12,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:12,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 467 transitions. [2022-12-13 21:21:12,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:12,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:12,902 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:12,902 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 416 flow. Second operand 4 states and 467 transitions. [2022-12-13 21:21:12,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 668 flow [2022-12-13 21:21:12,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 668 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:21:12,907 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 445 flow [2022-12-13 21:21:12,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=445, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2022-12-13 21:21:12,908 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2022-12-13 21:21:12,908 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 445 flow [2022-12-13 21:21:12,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:12,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:12,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:12,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 21:21:12,908 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:12,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1808365815, now seen corresponding path program 1 times [2022-12-13 21:21:12,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:12,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937827203] [2022-12-13 21:21:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:12,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:13,039 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 21:21:13,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:13,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937827203] [2022-12-13 21:21:13,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937827203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:13,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284020123] [2022-12-13 21:21:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:13,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:13,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:13,041 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:13,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:21:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:21:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:13,166 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 21:21:13,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:13,210 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 21:21:13,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284020123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:21:13,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:21:13,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-12-13 21:21:13,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103180440] [2022-12-13 21:21:13,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:21:13,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:21:13,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:21:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:21:13,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 231 [2022-12-13 21:21:13,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 445 flow. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:13,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:13,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 231 [2022-12-13 21:21:13,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:13,859 INFO L130 PetriNetUnfolder]: 5314/7732 cut-off events. [2022-12-13 21:21:13,859 INFO L131 PetriNetUnfolder]: For 38105/38105 co-relation queries the response was YES. [2022-12-13 21:21:13,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35251 conditions, 7732 events. 5314/7732 cut-off events. For 38105/38105 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39960 event pairs, 1668 based on Foata normal form. 779/8511 useless extension candidates. Maximal degree in co-relation 19284. Up to 3981 conditions per place. [2022-12-13 21:21:13,897 INFO L137 encePairwiseOnDemand]: 225/231 looper letters, 94 selfloop transitions, 31 changer transitions 3/128 dead transitions. [2022-12-13 21:21:13,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 128 transitions, 1312 flow [2022-12-13 21:21:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:21:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:21:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2022-12-13 21:21:13,899 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5573593073593074 [2022-12-13 21:21:13,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2022-12-13 21:21:13,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2022-12-13 21:21:13,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:13,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2022-12-13 21:21:13,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:13,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:13,901 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:13,901 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 445 flow. Second operand 4 states and 515 transitions. [2022-12-13 21:21:13,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 128 transitions, 1312 flow [2022-12-13 21:21:13,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 128 transitions, 1303 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:21:13,913 INFO L231 Difference]: Finished difference. Result has 61 places, 78 transitions, 890 flow [2022-12-13 21:21:13,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=890, PETRI_PLACES=61, PETRI_TRANSITIONS=78} [2022-12-13 21:21:13,913 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2022-12-13 21:21:13,913 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 78 transitions, 890 flow [2022-12-13 21:21:13,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:13,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:13,914 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:13,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 21:21:14,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:14,115 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash -966501367, now seen corresponding path program 2 times [2022-12-13 21:21:14,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:14,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679856649] [2022-12-13 21:21:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:14,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:14,275 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 21:21:14,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:14,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679856649] [2022-12-13 21:21:14,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679856649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:14,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499796568] [2022-12-13 21:21:14,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:21:14,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:14,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:14,277 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:14,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 21:21:14,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:21:14,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:14,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:21:14,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:14,426 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 21:21:14,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:14,472 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 21:21:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499796568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:21:14,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:21:14,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-12-13 21:21:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943216520] [2022-12-13 21:21:14,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:21:14,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:21:14,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:14,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:21:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:21:14,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 231 [2022-12-13 21:21:14,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 78 transitions, 890 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:14,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:14,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 231 [2022-12-13 21:21:14,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:15,914 INFO L130 PetriNetUnfolder]: 10470/15269 cut-off events. [2022-12-13 21:21:15,914 INFO L131 PetriNetUnfolder]: For 112147/112147 co-relation queries the response was YES. [2022-12-13 21:21:15,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79694 conditions, 15269 events. 10470/15269 cut-off events. For 112147/112147 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 89112 event pairs, 2502 based on Foata normal form. 857/16126 useless extension candidates. Maximal degree in co-relation 45050. Up to 6235 conditions per place. [2022-12-13 21:21:15,992 INFO L137 encePairwiseOnDemand]: 225/231 looper letters, 121 selfloop transitions, 77 changer transitions 3/201 dead transitions. [2022-12-13 21:21:15,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 201 transitions, 2392 flow [2022-12-13 21:21:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:21:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:21:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2022-12-13 21:21:15,993 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2022-12-13 21:21:15,994 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2022-12-13 21:21:15,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2022-12-13 21:21:15,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:15,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2022-12-13 21:21:15,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:15,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:15,996 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:15,996 INFO L175 Difference]: Start difference. First operand has 61 places, 78 transitions, 890 flow. Second operand 5 states and 649 transitions. [2022-12-13 21:21:15,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 201 transitions, 2392 flow [2022-12-13 21:21:16,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 201 transitions, 2354 flow, removed 19 selfloop flow, removed 0 redundant places. [2022-12-13 21:21:16,023 INFO L231 Difference]: Finished difference. Result has 67 places, 124 transitions, 1705 flow [2022-12-13 21:21:16,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1705, PETRI_PLACES=67, PETRI_TRANSITIONS=124} [2022-12-13 21:21:16,024 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2022-12-13 21:21:16,024 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 124 transitions, 1705 flow [2022-12-13 21:21:16,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:16,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:16,024 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:16,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 21:21:16,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 21:21:16,228 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:16,229 INFO L85 PathProgramCache]: Analyzing trace with hash 977431621, now seen corresponding path program 3 times [2022-12-13 21:21:16,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:16,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373904224] [2022-12-13 21:21:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:16,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:21:16,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373904224] [2022-12-13 21:21:16,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373904224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721520263] [2022-12-13 21:21:16,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:21:16,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:16,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:16,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:16,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 21:21:16,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 21:21:16,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:16,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 21:21:16,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:21:16,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:16,831 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 21:21:16,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721520263] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:21:16,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:21:16,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 18 [2022-12-13 21:21:16,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395519210] [2022-12-13 21:21:16,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:21:16,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 21:21:16,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 21:21:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-12-13 21:21:17,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 231 [2022-12-13 21:21:17,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 124 transitions, 1705 flow. Second operand has 19 states, 19 states have (on average 98.63157894736842) internal successors, (1874), 19 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:17,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:17,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 231 [2022-12-13 21:21:17,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:23,811 INFO L130 PetriNetUnfolder]: 39147/57108 cut-off events. [2022-12-13 21:21:23,811 INFO L131 PetriNetUnfolder]: For 459366/459366 co-relation queries the response was YES. [2022-12-13 21:21:23,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327498 conditions, 57108 events. 39147/57108 cut-off events. For 459366/459366 co-relation queries the response was YES. Maximal size of possible extension queue 2414. Compared 401271 event pairs, 3798 based on Foata normal form. 2936/60044 useless extension candidates. Maximal degree in co-relation 178879. Up to 19541 conditions per place. [2022-12-13 21:21:24,195 INFO L137 encePairwiseOnDemand]: 223/231 looper letters, 610 selfloop transitions, 646 changer transitions 6/1262 dead transitions. [2022-12-13 21:21:24,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 1262 transitions, 16669 flow [2022-12-13 21:21:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 21:21:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 21:21:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4047 transitions. [2022-12-13 21:21:24,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4734994734994735 [2022-12-13 21:21:24,203 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4047 transitions. [2022-12-13 21:21:24,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4047 transitions. [2022-12-13 21:21:24,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:24,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4047 transitions. [2022-12-13 21:21:24,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 109.37837837837837) internal successors, (4047), 37 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:24,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 231.0) internal successors, (8778), 38 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:24,222 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 231.0) internal successors, (8778), 38 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:24,222 INFO L175 Difference]: Start difference. First operand has 67 places, 124 transitions, 1705 flow. Second operand 37 states and 4047 transitions. [2022-12-13 21:21:24,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 1262 transitions, 16669 flow [2022-12-13 21:21:24,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 1262 transitions, 15567 flow, removed 551 selfloop flow, removed 0 redundant places. [2022-12-13 21:21:24,825 INFO L231 Difference]: Finished difference. Result has 123 places, 876 transitions, 13788 flow [2022-12-13 21:21:24,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=13788, PETRI_PLACES=123, PETRI_TRANSITIONS=876} [2022-12-13 21:21:24,826 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 89 predicate places. [2022-12-13 21:21:24,826 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 876 transitions, 13788 flow [2022-12-13 21:21:24,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 98.63157894736842) internal successors, (1874), 19 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:24,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:24,827 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:24,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 21:21:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:25,028 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:25,029 INFO L85 PathProgramCache]: Analyzing trace with hash -582143755, now seen corresponding path program 4 times [2022-12-13 21:21:25,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:25,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785844918] [2022-12-13 21:21:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:25,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:21:25,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:25,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785844918] [2022-12-13 21:21:25,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785844918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:25,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109042287] [2022-12-13 21:21:25,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:21:25,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:25,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:25,163 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:25,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 21:21:25,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:21:25,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:21:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:21:25,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:21:25,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109042287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:21:25,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:21:25,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 21:21:25,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949542433] [2022-12-13 21:21:25,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:21:25,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 21:21:25,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:25,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 21:21:25,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:21:25,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 231 [2022-12-13 21:21:25,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 876 transitions, 13788 flow. Second operand has 13 states, 13 states have (on average 106.84615384615384) internal successors, (1389), 13 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:25,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:25,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 231 [2022-12-13 21:21:25,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:21:40,711 INFO L130 PetriNetUnfolder]: 55386/80390 cut-off events. [2022-12-13 21:21:40,711 INFO L131 PetriNetUnfolder]: For 1539359/1539359 co-relation queries the response was YES. [2022-12-13 21:21:41,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566784 conditions, 80390 events. 55386/80390 cut-off events. For 1539359/1539359 co-relation queries the response was YES. Maximal size of possible extension queue 3393. Compared 585649 event pairs, 8160 based on Foata normal form. 2580/82970 useless extension candidates. Maximal degree in co-relation 472821. Up to 32030 conditions per place. [2022-12-13 21:21:41,299 INFO L137 encePairwiseOnDemand]: 226/231 looper letters, 1602 selfloop transitions, 360 changer transitions 208/2170 dead transitions. [2022-12-13 21:21:41,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 2170 transitions, 38297 flow [2022-12-13 21:21:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 21:21:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 21:21:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1829 transitions. [2022-12-13 21:21:41,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49485930735930733 [2022-12-13 21:21:41,305 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1829 transitions. [2022-12-13 21:21:41,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1829 transitions. [2022-12-13 21:21:41,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:21:41,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1829 transitions. [2022-12-13 21:21:41,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 114.3125) internal successors, (1829), 16 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:41,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 231.0) internal successors, (3927), 17 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:41,317 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 231.0) internal successors, (3927), 17 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:41,318 INFO L175 Difference]: Start difference. First operand has 123 places, 876 transitions, 13788 flow. Second operand 16 states and 1829 transitions. [2022-12-13 21:21:41,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 2170 transitions, 38297 flow [2022-12-13 21:21:53,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 2170 transitions, 36009 flow, removed 1086 selfloop flow, removed 3 redundant places. [2022-12-13 21:21:53,550 INFO L231 Difference]: Finished difference. Result has 144 places, 1179 transitions, 19218 flow [2022-12-13 21:21:53,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=12754, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19218, PETRI_PLACES=144, PETRI_TRANSITIONS=1179} [2022-12-13 21:21:53,551 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 110 predicate places. [2022-12-13 21:21:53,551 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 1179 transitions, 19218 flow [2022-12-13 21:21:53,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.84615384615384) internal successors, (1389), 13 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:53,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:21:53,552 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:21:53,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 21:21:53,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 21:21:53,753 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:21:53,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:21:53,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1052307497, now seen corresponding path program 5 times [2022-12-13 21:21:53,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:21:53,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013806507] [2022-12-13 21:21:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:21:53,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:21:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:21:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:21:53,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:21:53,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013806507] [2022-12-13 21:21:53,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013806507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:21:53,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446464272] [2022-12-13 21:21:53,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:21:53,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:21:53,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:21:53,881 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:21:53,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 21:21:53,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 21:21:53,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:21:53,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:21:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:21:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:21:54,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:21:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:21:54,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446464272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:21:54,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:21:54,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-13 21:21:54,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706996110] [2022-12-13 21:21:54,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:21:54,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 21:21:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:21:54,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 21:21:54,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:21:54,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 231 [2022-12-13 21:21:54,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 1179 transitions, 19218 flow. Second operand has 14 states, 14 states have (on average 101.42857142857143) internal successors, (1420), 14 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:21:54,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:21:54,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 231 [2022-12-13 21:21:54,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:33,742 INFO L130 PetriNetUnfolder]: 104122/152350 cut-off events. [2022-12-13 21:22:33,742 INFO L131 PetriNetUnfolder]: For 3266382/3266382 co-relation queries the response was YES. [2022-12-13 21:22:34,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1142763 conditions, 152350 events. 104122/152350 cut-off events. For 3266382/3266382 co-relation queries the response was YES. Maximal size of possible extension queue 6276. Compared 1202464 event pairs, 10990 based on Foata normal form. 15200/167550 useless extension candidates. Maximal degree in co-relation 1133850. Up to 49822 conditions per place. [2022-12-13 21:22:35,232 INFO L137 encePairwiseOnDemand]: 224/231 looper letters, 3622 selfloop transitions, 1864 changer transitions 41/5527 dead transitions. [2022-12-13 21:22:35,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 5527 transitions, 95734 flow [2022-12-13 21:22:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 21:22:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-13 21:22:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5925 transitions. [2022-12-13 21:22:35,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46635182998819363 [2022-12-13 21:22:35,239 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5925 transitions. [2022-12-13 21:22:35,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5925 transitions. [2022-12-13 21:22:35,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:35,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5925 transitions. [2022-12-13 21:22:35,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 107.72727272727273) internal successors, (5925), 55 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:22:35,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 231.0) internal successors, (12936), 56 states have internal predecessors, (12936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:22:35,257 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 231.0) internal successors, (12936), 56 states have internal predecessors, (12936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:22:35,258 INFO L175 Difference]: Start difference. First operand has 144 places, 1179 transitions, 19218 flow. Second operand 55 states and 5925 transitions. [2022-12-13 21:22:35,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 5527 transitions, 95734 flow [2022-12-13 21:23:26,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 5527 transitions, 92725 flow, removed 1170 selfloop flow, removed 3 redundant places. [2022-12-13 21:23:26,217 INFO L231 Difference]: Finished difference. Result has 240 places, 2993 transitions, 58043 flow [2022-12-13 21:23:26,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=17731, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=58043, PETRI_PLACES=240, PETRI_TRANSITIONS=2993} [2022-12-13 21:23:26,218 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 206 predicate places. [2022-12-13 21:23:26,218 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 2993 transitions, 58043 flow [2022-12-13 21:23:26,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 101.42857142857143) internal successors, (1420), 14 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:26,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:26,219 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:26,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 21:23:26,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 21:23:26,420 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 21:23:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:26,421 INFO L85 PathProgramCache]: Analyzing trace with hash 633462817, now seen corresponding path program 6 times [2022-12-13 21:23:26,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:26,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525513306] [2022-12-13 21:23:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:26,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:23:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525513306] [2022-12-13 21:23:26,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525513306] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:23:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290343434] [2022-12-13 21:23:26,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 21:23:26,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:26,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:23:26,572 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:23:26,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb4ff3e4-2c8a-4043-b935-b9291a179a94/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 21:23:26,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 21:23:26,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:23:26,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:23:26,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:23:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:23:26,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:23:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:23:26,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290343434] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:23:26,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:23:26,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-13 21:23:26,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293871588] [2022-12-13 21:23:26,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:23:26,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 21:23:26,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 21:23:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:23:26,882 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 231 [2022-12-13 21:23:26,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 2993 transitions, 58043 flow. Second operand has 14 states, 14 states have (on average 101.14285714285714) internal successors, (1416), 14 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:26,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:26,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 231 [2022-12-13 21:23:26,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:25:33,942 INFO L130 PetriNetUnfolder]: 176201/255209 cut-off events. [2022-12-13 21:25:33,943 INFO L131 PetriNetUnfolder]: For 21067826/21067826 co-relation queries the response was YES. [2022-12-13 21:25:36,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849104 conditions, 255209 events. 176201/255209 cut-off events. For 21067826/21067826 co-relation queries the response was YES. Maximal size of possible extension queue 10764. Compared 2112123 event pairs, 16226 based on Foata normal form. 6728/261937 useless extension candidates. Maximal degree in co-relation 2796402. Up to 81571 conditions per place. [2022-12-13 21:25:38,247 INFO L137 encePairwiseOnDemand]: 224/231 looper letters, 6190 selfloop transitions, 3460 changer transitions 757/10407 dead transitions. [2022-12-13 21:25:38,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 10407 transitions, 222534 flow [2022-12-13 21:25:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 21:25:38,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 21:25:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3847 transitions. [2022-12-13 21:25:38,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4758194186765615 [2022-12-13 21:25:38,252 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3847 transitions. [2022-12-13 21:25:38,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3847 transitions. [2022-12-13 21:25:38,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:25:38,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3847 transitions. [2022-12-13 21:25:38,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 109.91428571428571) internal successors, (3847), 35 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:38,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 231.0) internal successors, (8316), 36 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:38,263 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 231.0) internal successors, (8316), 36 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:38,263 INFO L175 Difference]: Start difference. First operand has 240 places, 2993 transitions, 58043 flow. Second operand 35 states and 3847 transitions. [2022-12-13 21:25:38,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 10407 transitions, 222534 flow