./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro --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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- 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-8393723 [2022-11-18 18:36:10,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:36:10,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:36:10,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:36:10,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:36:10,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:36:10,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:36:10,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:36:10,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:36:10,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:36:10,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:36:10,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:36:10,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:36:10,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:36:10,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:36:10,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:36:10,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:36:10,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:36:10,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:36:10,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:36:10,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:36:10,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:36:10,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:36:10,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:36:10,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:36:10,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:36:10,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:36:10,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:36:10,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:36:10,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:36:10,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:36:10,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:36:10,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:36:10,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:36:10,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:36:10,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:36:10,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:36:10,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:36:10,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:36:10,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:36:10,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:36:10,612 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:36:10,646 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:36:10,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:36:10,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:36:10,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:36:10,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:36:10,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:36:10,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:36:10,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:36:10,656 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:36:10,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:36:10,657 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:36:10,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:36:10,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:36:10,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:36:10,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:36:10,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:36:10,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:36:10,659 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:36:10,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:36:10,660 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:36:10,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:36:10,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:36:10,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:36:10,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:36:10,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:36:10,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:36:10,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:36:10,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:36:10,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:36:10,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:36:10,664 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:36:10,664 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:36:10,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:36:10,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2022-11-18 18:36:10,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:36:11,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:36:11,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:36:11,018 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:36:11,019 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:36:11,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-11-18 18:36:11,103 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/data/9da126d2e/a4ce5ff4abcf4198961e6fb0c488aa6c/FLAGee0ed2237 [2022-11-18 18:36:11,595 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:36:11,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-11-18 18:36:11,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/data/9da126d2e/a4ce5ff4abcf4198961e6fb0c488aa6c/FLAGee0ed2237 [2022-11-18 18:36:11,975 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/data/9da126d2e/a4ce5ff4abcf4198961e6fb0c488aa6c [2022-11-18 18:36:11,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:36:11,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:36:11,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:36:11,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:36:11,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:36:11,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:36:11" (1/1) ... [2022-11-18 18:36:11,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59989809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:11, skipping insertion in model container [2022-11-18 18:36:11,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:36:11" (1/1) ... [2022-11-18 18:36:12,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:36:12,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:36:12,230 WARN L234 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_633c6494-5250-48d4-b156-5aa15606b76c/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-11-18 18:36:12,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:36:12,246 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:36:12,269 WARN L234 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_633c6494-5250-48d4-b156-5aa15606b76c/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-11-18 18:36:12,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:36:12,289 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:36:12,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12 WrapperNode [2022-11-18 18:36:12,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:36:12,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:36:12,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:36:12,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:36:12,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,332 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-11-18 18:36:12,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:36:12,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:36:12,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:36:12,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:36:12,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,361 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:36:12,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:36:12,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:36:12,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:36:12,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (1/1) ... [2022-11-18 18:36:12,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:36:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:12,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:36:12,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:36:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:36:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 18:36:12,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 18:36:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 18:36:12,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 18:36:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:36:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:36:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:36:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:36:12,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:36:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:36:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:36:12,476 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:36:12,619 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:36:12,622 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:36:12,827 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:36:12,835 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:36:12,835 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:36:12,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:36:12 BoogieIcfgContainer [2022-11-18 18:36:12,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:36:12,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:36:12,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:36:12,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:36:12,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:36:11" (1/3) ... [2022-11-18 18:36:12,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb687b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:36:12, skipping insertion in model container [2022-11-18 18:36:12,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:36:12" (2/3) ... [2022-11-18 18:36:12,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb687b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:36:12, skipping insertion in model container [2022-11-18 18:36:12,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:36:12" (3/3) ... [2022-11-18 18:36:12,848 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-11-18 18:36:12,859 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:36:12,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:36:12,894 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:36:12,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:36:13,036 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:36:13,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2022-11-18 18:36:13,147 INFO L130 PetriNetUnfolder]: 5/78 cut-off events. [2022-11-18 18:36:13,148 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:36:13,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-11-18 18:36:13,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2022-11-18 18:36:13,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2022-11-18 18:36:13,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:36:13,181 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;@34450c79, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:36:13,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 18:36:13,220 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-11-18 18:36:13,221 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:36:13,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:13,222 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:13,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:13,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1776550383, now seen corresponding path program 1 times [2022-11-18 18:36:13,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:13,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223498219] [2022-11-18 18:36:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:13,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:13,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:13,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223498219] [2022-11-18 18:36:13,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223498219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:13,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:13,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:36:13,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262155085] [2022-11-18 18:36:13,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:13,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:36:13,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:13,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:36:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:36:13,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2022-11-18 18:36:13,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:13,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2022-11-18 18:36:13,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:13,664 INFO L130 PetriNetUnfolder]: 2/66 cut-off events. [2022-11-18 18:36:13,664 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 18:36:13,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2022-11-18 18:36:13,667 INFO L137 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2022-11-18 18:36:13,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2022-11-18 18:36:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:36:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:36:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2022-11-18 18:36:13,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.94375 [2022-11-18 18:36:13,684 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2022-11-18 18:36:13,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2022-11-18 18:36:13,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:13,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2022-11-18 18:36:13,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,699 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,701 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2022-11-18 18:36:13,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2022-11-18 18:36:13,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 18:36:13,710 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2022-11-18 18:36:13,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2022-11-18 18:36:13,717 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-11-18 18:36:13,717 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2022-11-18 18:36:13,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:13,719 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:13,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:36:13,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:13,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2022-11-18 18:36:13,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378167566] [2022-11-18 18:36:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:14,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:14,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378167566] [2022-11-18 18:36:14,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378167566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:14,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:14,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:36:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000315585] [2022-11-18 18:36:14,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:14,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:36:14,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:14,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:36:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:36:14,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2022-11-18 18:36:14,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:14,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:14,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2022-11-18 18:36:14,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:14,911 INFO L130 PetriNetUnfolder]: 11/127 cut-off events. [2022-11-18 18:36:14,912 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 18:36:14,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 127 events. 11/127 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 166. Up to 17 conditions per place. [2022-11-18 18:36:14,914 INFO L137 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-11-18 18:36:14,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2022-11-18 18:36:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:36:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:36:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2022-11-18 18:36:14,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2022-11-18 18:36:14,919 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2022-11-18 18:36:14,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2022-11-18 18:36:14,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:14,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2022-11-18 18:36:14,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:14,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:14,933 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:14,933 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2022-11-18 18:36:14,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2022-11-18 18:36:14,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:36:14,937 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2022-11-18 18:36:14,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-11-18 18:36:14,942 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-11-18 18:36:14,942 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2022-11-18 18:36:14,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:14,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:14,947 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:14,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:36:14,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash -919337767, now seen corresponding path program 1 times [2022-11-18 18:36:14,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:14,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790760481] [2022-11-18 18:36:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:14,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:15,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:15,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790760481] [2022-11-18 18:36:15,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790760481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:15,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009637883] [2022-11-18 18:36:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:15,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:15,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:15,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:15,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:36:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 18:36:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:16,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:16,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009637883] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:16,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:36:16,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 17 [2022-11-18 18:36:16,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559390806] [2022-11-18 18:36:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:36:16,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:36:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:36:16,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-11-18 18:36:16,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:16,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:16,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-11-18 18:36:16,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:17,380 INFO L130 PetriNetUnfolder]: 123/382 cut-off events. [2022-11-18 18:36:17,380 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-18 18:36:17,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 382 events. 123/382 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1722 event pairs, 15 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 721. Up to 98 conditions per place. [2022-11-18 18:36:17,385 INFO L137 encePairwiseOnDemand]: 70/80 looper letters, 59 selfloop transitions, 15 changer transitions 4/119 dead transitions. [2022-11-18 18:36:17,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 453 flow [2022-11-18 18:36:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:36:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 18:36:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 588 transitions. [2022-11-18 18:36:17,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.735 [2022-11-18 18:36:17,396 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 588 transitions. [2022-11-18 18:36:17,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 588 transitions. [2022-11-18 18:36:17,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:17,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 588 transitions. [2022-11-18 18:36:17,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.8) internal successors, (588), 10 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:17,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:17,411 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:17,411 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 10 states and 588 transitions. [2022-11-18 18:36:17,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 453 flow [2022-11-18 18:36:17,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 119 transitions, 443 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-18 18:36:17,419 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 263 flow [2022-11-18 18:36:17,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2022-11-18 18:36:17,422 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2022-11-18 18:36:17,423 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 263 flow [2022-11-18 18:36:17,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:17,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:17,425 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:17,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:17,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:17,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1688628123, now seen corresponding path program 1 times [2022-11-18 18:36:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:17,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211959511] [2022-11-18 18:36:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:17,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:18,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:18,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211959511] [2022-11-18 18:36:18,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211959511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:18,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529551810] [2022-11-18 18:36:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:18,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:18,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:18,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:36:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:36:18,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:18,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:19,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529551810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:19,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:19,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2022-11-18 18:36:19,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937747518] [2022-11-18 18:36:19,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:19,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:36:19,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:36:19,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:36:19,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-18 18:36:19,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 263 flow. Second operand has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:19,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:19,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-18 18:36:19,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:19,731 INFO L130 PetriNetUnfolder]: 53/291 cut-off events. [2022-11-18 18:36:19,731 INFO L131 PetriNetUnfolder]: For 250/262 co-relation queries the response was YES. [2022-11-18 18:36:19,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 291 events. 53/291 cut-off events. For 250/262 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1306 event pairs, 5 based on Foata normal form. 4/276 useless extension candidates. Maximal degree in co-relation 649. Up to 53 conditions per place. [2022-11-18 18:36:19,736 INFO L137 encePairwiseOnDemand]: 71/80 looper letters, 35 selfloop transitions, 8 changer transitions 11/104 dead transitions. [2022-11-18 18:36:19,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 476 flow [2022-11-18 18:36:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:36:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:36:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 554 transitions. [2022-11-18 18:36:19,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7694444444444445 [2022-11-18 18:36:19,739 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 554 transitions. [2022-11-18 18:36:19,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 554 transitions. [2022-11-18 18:36:19,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:19,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 554 transitions. [2022-11-18 18:36:19,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.55555555555556) internal successors, (554), 9 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:19,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:19,745 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:19,745 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 263 flow. Second operand 9 states and 554 transitions. [2022-11-18 18:36:19,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 476 flow [2022-11-18 18:36:19,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 104 transitions, 443 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-11-18 18:36:19,753 INFO L231 Difference]: Finished difference. Result has 93 places, 79 transitions, 282 flow [2022-11-18 18:36:19,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=93, PETRI_TRANSITIONS=79} [2022-11-18 18:36:19,754 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 22 predicate places. [2022-11-18 18:36:19,754 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 79 transitions, 282 flow [2022-11-18 18:36:19,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:19,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:19,756 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:19,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:19,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:19,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:19,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1272231241, now seen corresponding path program 2 times [2022-11-18 18:36:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:19,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186114219] [2022-11-18 18:36:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:19,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:20,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:20,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186114219] [2022-11-18 18:36:20,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186114219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:20,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609314488] [2022-11-18 18:36:20,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:36:20,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:20,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:20,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:20,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:36:20,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:36:20,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:36:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 18:36:20,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:20,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:21,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609314488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:21,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:21,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 18 [2022-11-18 18:36:21,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615964015] [2022-11-18 18:36:21,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:21,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:36:21,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:36:21,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:36:21,452 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-11-18 18:36:21,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 79 transitions, 282 flow. Second operand has 18 states, 18 states have (on average 53.55555555555556) internal successors, (964), 18 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:21,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:21,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-11-18 18:36:21,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:22,220 INFO L130 PetriNetUnfolder]: 156/562 cut-off events. [2022-11-18 18:36:22,220 INFO L131 PetriNetUnfolder]: For 551/551 co-relation queries the response was YES. [2022-11-18 18:36:22,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1393 conditions, 562 events. 156/562 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3005 event pairs, 26 based on Foata normal form. 3/560 useless extension candidates. Maximal degree in co-relation 1378. Up to 121 conditions per place. [2022-11-18 18:36:22,232 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 81 selfloop transitions, 29 changer transitions 18/169 dead transitions. [2022-11-18 18:36:22,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 169 transitions, 918 flow [2022-11-18 18:36:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:36:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 18:36:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1092 transitions. [2022-11-18 18:36:22,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.718421052631579 [2022-11-18 18:36:22,236 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1092 transitions. [2022-11-18 18:36:22,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1092 transitions. [2022-11-18 18:36:22,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:22,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1092 transitions. [2022-11-18 18:36:22,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.473684210526315) internal successors, (1092), 19 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:22,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:22,245 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:22,245 INFO L175 Difference]: Start difference. First operand has 93 places, 79 transitions, 282 flow. Second operand 19 states and 1092 transitions. [2022-11-18 18:36:22,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 169 transitions, 918 flow [2022-11-18 18:36:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 169 transitions, 832 flow, removed 32 selfloop flow, removed 6 redundant places. [2022-11-18 18:36:22,257 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 496 flow [2022-11-18 18:36:22,258 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=496, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2022-11-18 18:36:22,262 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 42 predicate places. [2022-11-18 18:36:22,262 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 496 flow [2022-11-18 18:36:22,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 53.55555555555556) internal successors, (964), 18 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:22,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:22,266 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:22,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 18:36:22,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:22,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1152496093, now seen corresponding path program 3 times [2022-11-18 18:36:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:22,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682710815] [2022-11-18 18:36:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:22,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:22,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682710815] [2022-11-18 18:36:22,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682710815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:22,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297017781] [2022-11-18 18:36:22,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:36:22,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:22,914 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:22,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:36:23,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:36:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:36:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:36:23,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:23,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:36:23,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297017781] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:23,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:36:23,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 13 [2022-11-18 18:36:23,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901722733] [2022-11-18 18:36:23,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:23,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:36:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:36:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:36:23,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-18 18:36:23,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 496 flow. Second operand has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 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) [2022-11-18 18:36:23,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:23,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-18 18:36:23,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:24,020 INFO L130 PetriNetUnfolder]: 60/387 cut-off events. [2022-11-18 18:36:24,021 INFO L131 PetriNetUnfolder]: For 730/792 co-relation queries the response was YES. [2022-11-18 18:36:24,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 387 events. 60/387 cut-off events. For 730/792 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2012 event pairs, 10 based on Foata normal form. 10/387 useless extension candidates. Maximal degree in co-relation 945. Up to 71 conditions per place. [2022-11-18 18:36:24,025 INFO L137 encePairwiseOnDemand]: 71/80 looper letters, 44 selfloop transitions, 14 changer transitions 9/115 dead transitions. [2022-11-18 18:36:24,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 115 transitions, 755 flow [2022-11-18 18:36:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:36:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 18:36:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 491 transitions. [2022-11-18 18:36:24,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7671875 [2022-11-18 18:36:24,028 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 491 transitions. [2022-11-18 18:36:24,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 491 transitions. [2022-11-18 18:36:24,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:24,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 491 transitions. [2022-11-18 18:36:24,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 61.375) internal successors, (491), 8 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:24,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 80.0) internal successors, (720), 9 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:24,033 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 80.0) internal successors, (720), 9 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:24,033 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 496 flow. Second operand 8 states and 491 transitions. [2022-11-18 18:36:24,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 115 transitions, 755 flow [2022-11-18 18:36:24,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 115 transitions, 671 flow, removed 34 selfloop flow, removed 10 redundant places. [2022-11-18 18:36:24,041 INFO L231 Difference]: Finished difference. Result has 108 places, 98 transitions, 488 flow [2022-11-18 18:36:24,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=488, PETRI_PLACES=108, PETRI_TRANSITIONS=98} [2022-11-18 18:36:24,043 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 37 predicate places. [2022-11-18 18:36:24,043 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 98 transitions, 488 flow [2022-11-18 18:36:24,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 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) [2022-11-18 18:36:24,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:24,044 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:24,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:24,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:36:24,250 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:24,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1852234681, now seen corresponding path program 2 times [2022-11-18 18:36:24,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:24,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915723812] [2022-11-18 18:36:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:24,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915723812] [2022-11-18 18:36:24,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915723812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139061859] [2022-11-18 18:36:24,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:36:24,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:24,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:24,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:24,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:36:24,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:36:24,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:36:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:36:24,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:25,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:26,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139061859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:26,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:26,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-11-18 18:36:26,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763335969] [2022-11-18 18:36:26,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:26,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:36:26,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:26,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:36:26,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:36:26,155 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-18 18:36:26,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 98 transitions, 488 flow. Second operand has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:26,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:26,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-18 18:36:26,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:27,172 INFO L130 PetriNetUnfolder]: 85/457 cut-off events. [2022-11-18 18:36:27,173 INFO L131 PetriNetUnfolder]: For 746/772 co-relation queries the response was YES. [2022-11-18 18:36:27,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1227 conditions, 457 events. 85/457 cut-off events. For 746/772 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2432 event pairs, 0 based on Foata normal form. 16/464 useless extension candidates. Maximal degree in co-relation 1205. Up to 83 conditions per place. [2022-11-18 18:36:27,178 INFO L137 encePairwiseOnDemand]: 70/80 looper letters, 42 selfloop transitions, 42 changer transitions 12/152 dead transitions. [2022-11-18 18:36:27,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 152 transitions, 957 flow [2022-11-18 18:36:27,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:36:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 18:36:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1027 transitions. [2022-11-18 18:36:27,183 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7551470588235294 [2022-11-18 18:36:27,183 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1027 transitions. [2022-11-18 18:36:27,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1027 transitions. [2022-11-18 18:36:27,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:27,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1027 transitions. [2022-11-18 18:36:27,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.411764705882355) internal successors, (1027), 17 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:27,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:27,191 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:27,191 INFO L175 Difference]: Start difference. First operand has 108 places, 98 transitions, 488 flow. Second operand 17 states and 1027 transitions. [2022-11-18 18:36:27,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 152 transitions, 957 flow [2022-11-18 18:36:27,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 152 transitions, 887 flow, removed 19 selfloop flow, removed 6 redundant places. [2022-11-18 18:36:27,201 INFO L231 Difference]: Finished difference. Result has 129 places, 117 transitions, 747 flow [2022-11-18 18:36:27,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=747, PETRI_PLACES=129, PETRI_TRANSITIONS=117} [2022-11-18 18:36:27,202 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 58 predicate places. [2022-11-18 18:36:27,202 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 747 flow [2022-11-18 18:36:27,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:27,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:27,204 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:27,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:27,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:36:27,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash -725373525, now seen corresponding path program 3 times [2022-11-18 18:36:27,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:27,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003720927] [2022-11-18 18:36:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:27,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:27,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:27,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003720927] [2022-11-18 18:36:27,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003720927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:27,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529031140] [2022-11-18 18:36:27,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:36:27,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:27,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:27,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:27,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:36:27,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:36:27,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:36:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:36:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:28,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:28,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529031140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:28,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:28,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-11-18 18:36:28,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201164897] [2022-11-18 18:36:28,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:28,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 18:36:28,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:28,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 18:36:28,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:36:28,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-18 18:36:28,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 117 transitions, 747 flow. Second operand has 15 states, 15 states have (on average 57.93333333333333) internal successors, (869), 15 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:28,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:28,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-18 18:36:28,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:29,333 INFO L130 PetriNetUnfolder]: 101/606 cut-off events. [2022-11-18 18:36:29,334 INFO L131 PetriNetUnfolder]: For 1496/1548 co-relation queries the response was YES. [2022-11-18 18:36:29,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 606 events. 101/606 cut-off events. For 1496/1548 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3733 event pairs, 1 based on Foata normal form. 38/638 useless extension candidates. Maximal degree in co-relation 1777. Up to 85 conditions per place. [2022-11-18 18:36:29,342 INFO L137 encePairwiseOnDemand]: 70/80 looper letters, 49 selfloop transitions, 60 changer transitions 12/177 dead transitions. [2022-11-18 18:36:29,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 177 transitions, 1388 flow [2022-11-18 18:36:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:36:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 18:36:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1150 transitions. [2022-11-18 18:36:29,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.756578947368421 [2022-11-18 18:36:29,347 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1150 transitions. [2022-11-18 18:36:29,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1150 transitions. [2022-11-18 18:36:29,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:29,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1150 transitions. [2022-11-18 18:36:29,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.526315789473685) internal successors, (1150), 19 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:29,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:29,356 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:29,356 INFO L175 Difference]: Start difference. First operand has 129 places, 117 transitions, 747 flow. Second operand 19 states and 1150 transitions. [2022-11-18 18:36:29,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 177 transitions, 1388 flow [2022-11-18 18:36:29,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 177 transitions, 1300 flow, removed 37 selfloop flow, removed 9 redundant places. [2022-11-18 18:36:29,372 INFO L231 Difference]: Finished difference. Result has 145 places, 134 transitions, 1071 flow [2022-11-18 18:36:29,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1071, PETRI_PLACES=145, PETRI_TRANSITIONS=134} [2022-11-18 18:36:29,373 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 74 predicate places. [2022-11-18 18:36:29,373 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 134 transitions, 1071 flow [2022-11-18 18:36:29,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.93333333333333) internal successors, (869), 15 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:29,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:29,375 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:29,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:29,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:29,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1957011613, now seen corresponding path program 4 times [2022-11-18 18:36:29,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:29,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076293267] [2022-11-18 18:36:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:29,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:30,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:30,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076293267] [2022-11-18 18:36:30,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076293267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:30,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601434010] [2022-11-18 18:36:30,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:36:30,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:30,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:30,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:30,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:36:30,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:36:30,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:36:30,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 18:36:30,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:30,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:31,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601434010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:31,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:31,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-11-18 18:36:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340970260] [2022-11-18 18:36:31,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:31,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:36:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:36:31,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:36:31,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-18 18:36:31,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 134 transitions, 1071 flow. Second operand has 17 states, 17 states have (on average 57.94117647058823) internal successors, (985), 17 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:31,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:31,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-18 18:36:31,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:32,134 INFO L130 PetriNetUnfolder]: 158/773 cut-off events. [2022-11-18 18:36:32,134 INFO L131 PetriNetUnfolder]: For 2708/2790 co-relation queries the response was YES. [2022-11-18 18:36:32,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2501 conditions, 773 events. 158/773 cut-off events. For 2708/2790 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5585 event pairs, 34 based on Foata normal form. 31/783 useless extension candidates. Maximal degree in co-relation 2464. Up to 227 conditions per place. [2022-11-18 18:36:32,142 INFO L137 encePairwiseOnDemand]: 70/80 looper letters, 49 selfloop transitions, 65 changer transitions 23/194 dead transitions. [2022-11-18 18:36:32,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 194 transitions, 1840 flow [2022-11-18 18:36:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 18:36:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 18:36:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1494 transitions. [2022-11-18 18:36:32,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.747 [2022-11-18 18:36:32,147 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1494 transitions. [2022-11-18 18:36:32,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1494 transitions. [2022-11-18 18:36:32,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:32,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1494 transitions. [2022-11-18 18:36:32,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 59.76) internal successors, (1494), 25 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:32,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 80.0) internal successors, (2080), 26 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:32,158 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 80.0) internal successors, (2080), 26 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:32,158 INFO L175 Difference]: Start difference. First operand has 145 places, 134 transitions, 1071 flow. Second operand 25 states and 1494 transitions. [2022-11-18 18:36:32,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 194 transitions, 1840 flow [2022-11-18 18:36:32,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 194 transitions, 1651 flow, removed 56 selfloop flow, removed 14 redundant places. [2022-11-18 18:36:32,184 INFO L231 Difference]: Finished difference. Result has 160 places, 148 transitions, 1326 flow [2022-11-18 18:36:32,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1326, PETRI_PLACES=160, PETRI_TRANSITIONS=148} [2022-11-18 18:36:32,186 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 89 predicate places. [2022-11-18 18:36:32,186 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 148 transitions, 1326 flow [2022-11-18 18:36:32,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.94117647058823) internal successors, (985), 17 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:32,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:32,187 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:32,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:32,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:32,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash -75381783, now seen corresponding path program 5 times [2022-11-18 18:36:32,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:32,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498631886] [2022-11-18 18:36:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:32,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:32,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:32,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498631886] [2022-11-18 18:36:32,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498631886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:32,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935970906] [2022-11-18 18:36:32,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:36:32,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:32,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:32,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:32,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:36:33,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 18:36:33,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:36:33,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 18:36:33,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:33,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:33,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935970906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:33,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:33,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-11-18 18:36:33,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543068392] [2022-11-18 18:36:33,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:33,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:36:33,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:36:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:36:33,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-11-18 18:36:33,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 148 transitions, 1326 flow. Second operand has 19 states, 19 states have (on average 53.8421052631579) internal successors, (1023), 19 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:33,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:33,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-11-18 18:36:33,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:35,229 INFO L130 PetriNetUnfolder]: 312/1130 cut-off events. [2022-11-18 18:36:35,230 INFO L131 PetriNetUnfolder]: For 4773/4773 co-relation queries the response was YES. [2022-11-18 18:36:35,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4118 conditions, 1130 events. 312/1130 cut-off events. For 4773/4773 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8114 event pairs, 71 based on Foata normal form. 2/1124 useless extension candidates. Maximal degree in co-relation 4079. Up to 349 conditions per place. [2022-11-18 18:36:35,242 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 117 selfloop transitions, 64 changer transitions 20/242 dead transitions. [2022-11-18 18:36:35,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 242 transitions, 2349 flow [2022-11-18 18:36:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:36:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 18:36:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1259 transitions. [2022-11-18 18:36:35,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7153409090909091 [2022-11-18 18:36:35,246 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1259 transitions. [2022-11-18 18:36:35,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1259 transitions. [2022-11-18 18:36:35,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:35,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1259 transitions. [2022-11-18 18:36:35,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 57.22727272727273) internal successors, (1259), 22 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:35,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 80.0) internal successors, (1840), 23 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:35,255 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 80.0) internal successors, (1840), 23 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:35,255 INFO L175 Difference]: Start difference. First operand has 160 places, 148 transitions, 1326 flow. Second operand 22 states and 1259 transitions. [2022-11-18 18:36:35,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 242 transitions, 2349 flow [2022-11-18 18:36:35,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 242 transitions, 2153 flow, removed 54 selfloop flow, removed 17 redundant places. [2022-11-18 18:36:35,308 INFO L231 Difference]: Finished difference. Result has 163 places, 153 transitions, 1467 flow [2022-11-18 18:36:35,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1467, PETRI_PLACES=163, PETRI_TRANSITIONS=153} [2022-11-18 18:36:35,309 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 92 predicate places. [2022-11-18 18:36:35,309 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 153 transitions, 1467 flow [2022-11-18 18:36:35,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.8421052631579) internal successors, (1023), 19 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:35,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:35,310 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:35,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:35,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:35,518 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:35,518 INFO L85 PathProgramCache]: Analyzing trace with hash 670871893, now seen corresponding path program 1 times [2022-11-18 18:36:35,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:35,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387347162] [2022-11-18 18:36:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:35,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:36,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387347162] [2022-11-18 18:36:36,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387347162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892492762] [2022-11-18 18:36:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:36,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:36,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:36,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:36:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:36:37,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:40,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:54,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892492762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:54,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:54,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 38 [2022-11-18 18:36:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049798654] [2022-11-18 18:36:54,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:54,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 18:36:54,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 18:36:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1203, Unknown=4, NotChecked=0, Total=1406 [2022-11-18 18:36:54,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:36:54,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 153 transitions, 1467 flow. Second operand has 38 states, 38 states have (on average 48.60526315789474) internal successors, (1847), 38 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:54,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:54,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:36:54,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:12,077 INFO L130 PetriNetUnfolder]: 416/1402 cut-off events. [2022-11-18 18:37:12,078 INFO L131 PetriNetUnfolder]: For 6228/6228 co-relation queries the response was YES. [2022-11-18 18:37:12,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5247 conditions, 1402 events. 416/1402 cut-off events. For 6228/6228 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10724 event pairs, 52 based on Foata normal form. 2/1402 useless extension candidates. Maximal degree in co-relation 5209. Up to 334 conditions per place. [2022-11-18 18:37:12,094 INFO L137 encePairwiseOnDemand]: 59/80 looper letters, 132 selfloop transitions, 178 changer transitions 26/373 dead transitions. [2022-11-18 18:37:12,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 373 transitions, 3718 flow [2022-11-18 18:37:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-18 18:37:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-18 18:37:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 2984 transitions. [2022-11-18 18:37:12,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6431034482758621 [2022-11-18 18:37:12,103 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 2984 transitions. [2022-11-18 18:37:12,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 2984 transitions. [2022-11-18 18:37:12,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:12,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 2984 transitions. [2022-11-18 18:37:12,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 51.44827586206897) internal successors, (2984), 58 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:12,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 80.0) internal successors, (4720), 59 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:12,124 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 80.0) internal successors, (4720), 59 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:12,125 INFO L175 Difference]: Start difference. First operand has 163 places, 153 transitions, 1467 flow. Second operand 58 states and 2984 transitions. [2022-11-18 18:37:12,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 373 transitions, 3718 flow [2022-11-18 18:37:12,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 373 transitions, 3490 flow, removed 32 selfloop flow, removed 18 redundant places. [2022-11-18 18:37:12,177 INFO L231 Difference]: Finished difference. Result has 236 places, 252 transitions, 2901 flow [2022-11-18 18:37:12,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=2901, PETRI_PLACES=236, PETRI_TRANSITIONS=252} [2022-11-18 18:37:12,178 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 165 predicate places. [2022-11-18 18:37:12,179 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 252 transitions, 2901 flow [2022-11-18 18:37:12,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.60526315789474) internal successors, (1847), 38 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:12,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:12,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:12,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 18:37:12,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:12,387 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1568120289, now seen corresponding path program 2 times [2022-11-18 18:37:12,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:12,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668737244] [2022-11-18 18:37:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:12,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:13,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668737244] [2022-11-18 18:37:13,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668737244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408225252] [2022-11-18 18:37:13,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:37:13,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:13,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:13,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:13,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:37:14,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:37:14,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:37:14,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:37:14,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:15,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:21,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408225252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:21,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:21,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-18 18:37:21,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637053422] [2022-11-18 18:37:21,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:21,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 18:37:21,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:21,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 18:37:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:37:21,981 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:37:21,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 252 transitions, 2901 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:21,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:21,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:37:21,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:36,540 INFO L130 PetriNetUnfolder]: 456/1575 cut-off events. [2022-11-18 18:37:36,540 INFO L131 PetriNetUnfolder]: For 11369/11369 co-relation queries the response was YES. [2022-11-18 18:37:36,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7546 conditions, 1575 events. 456/1575 cut-off events. For 11369/11369 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12460 event pairs, 62 based on Foata normal form. 1/1574 useless extension candidates. Maximal degree in co-relation 7473. Up to 389 conditions per place. [2022-11-18 18:37:36,559 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 133 selfloop transitions, 235 changer transitions 19/424 dead transitions. [2022-11-18 18:37:36,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 424 transitions, 5318 flow [2022-11-18 18:37:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 18:37:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-18 18:37:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3094 transitions. [2022-11-18 18:37:36,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6445833333333333 [2022-11-18 18:37:36,567 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3094 transitions. [2022-11-18 18:37:36,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3094 transitions. [2022-11-18 18:37:36,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:36,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3094 transitions. [2022-11-18 18:37:36,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 51.56666666666667) internal successors, (3094), 60 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:36,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 80.0) internal successors, (4880), 61 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:36,589 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 80.0) internal successors, (4880), 61 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:36,590 INFO L175 Difference]: Start difference. First operand has 236 places, 252 transitions, 2901 flow. Second operand 60 states and 3094 transitions. [2022-11-18 18:37:36,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 424 transitions, 5318 flow [2022-11-18 18:37:36,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 424 transitions, 4854 flow, removed 153 selfloop flow, removed 16 redundant places. [2022-11-18 18:37:36,717 INFO L231 Difference]: Finished difference. Result has 286 places, 318 transitions, 3950 flow [2022-11-18 18:37:36,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=3950, PETRI_PLACES=286, PETRI_TRANSITIONS=318} [2022-11-18 18:37:36,719 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 215 predicate places. [2022-11-18 18:37:36,719 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 318 transitions, 3950 flow [2022-11-18 18:37:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:36,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:36,721 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:36,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:37:36,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 18:37:36,928 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash 151084951, now seen corresponding path program 3 times [2022-11-18 18:37:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:36,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878174248] [2022-11-18 18:37:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:38,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878174248] [2022-11-18 18:37:38,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878174248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:38,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644299313] [2022-11-18 18:37:38,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:37:38,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:38,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:38,759 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:38,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:37:38,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:37:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:37:38,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:37:38,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:42,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:48,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644299313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:48,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:48,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-18 18:37:48,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107223916] [2022-11-18 18:37:48,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:48,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 18:37:48,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 18:37:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:37:48,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:37:48,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 318 transitions, 3950 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:48,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:48,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:37:48,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:07,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:38:19,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:38:24,638 INFO L130 PetriNetUnfolder]: 681/2205 cut-off events. [2022-11-18 18:38:24,638 INFO L131 PetriNetUnfolder]: For 18585/18585 co-relation queries the response was YES. [2022-11-18 18:38:24,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11389 conditions, 2205 events. 681/2205 cut-off events. For 18585/18585 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18648 event pairs, 51 based on Foata normal form. 2/2205 useless extension candidates. Maximal degree in co-relation 11312. Up to 435 conditions per place. [2022-11-18 18:38:24,666 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 191 selfloop transitions, 497 changer transitions 36/761 dead transitions. [2022-11-18 18:38:24,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 761 transitions, 10725 flow [2022-11-18 18:38:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-11-18 18:38:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2022-11-18 18:38:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 6777 transitions. [2022-11-18 18:38:24,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6321828358208955 [2022-11-18 18:38:24,734 INFO L72 ComplementDD]: Start complementDD. Operand 134 states and 6777 transitions. [2022-11-18 18:38:24,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 134 states and 6777 transitions. [2022-11-18 18:38:24,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:24,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 134 states and 6777 transitions. [2022-11-18 18:38:24,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 135 states, 134 states have (on average 50.57462686567164) internal successors, (6777), 134 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:24,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 135 states, 135 states have (on average 80.0) internal successors, (10800), 135 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:24,799 INFO L81 ComplementDD]: Finished complementDD. Result has 135 states, 135 states have (on average 80.0) internal successors, (10800), 135 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:24,800 INFO L175 Difference]: Start difference. First operand has 286 places, 318 transitions, 3950 flow. Second operand 134 states and 6777 transitions. [2022-11-18 18:38:24,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 761 transitions, 10725 flow [2022-11-18 18:38:25,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 761 transitions, 9925 flow, removed 229 selfloop flow, removed 31 redundant places. [2022-11-18 18:38:25,029 INFO L231 Difference]: Finished difference. Result has 415 places, 582 transitions, 8566 flow [2022-11-18 18:38:25,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=8566, PETRI_PLACES=415, PETRI_TRANSITIONS=582} [2022-11-18 18:38:25,031 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 344 predicate places. [2022-11-18 18:38:25,032 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 582 transitions, 8566 flow [2022-11-18 18:38:25,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:25,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:25,033 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:25,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:25,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:38:25,240 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1044905203, now seen corresponding path program 4 times [2022-11-18 18:38:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:25,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648818087] [2022-11-18 18:38:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:27,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:27,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648818087] [2022-11-18 18:38:27,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648818087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:27,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226699155] [2022-11-18 18:38:27,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:38:27,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:27,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:27,024 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:27,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:38:27,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:38:27,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:38:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:38:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:28,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:33,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226699155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:33,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:33,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-18 18:38:33,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288480779] [2022-11-18 18:38:33,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:33,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 18:38:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:33,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 18:38:33,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:38:33,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:38:33,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 582 transitions, 8566 flow. Second operand has 38 states, 38 states have (on average 48.60526315789474) internal successors, (1847), 38 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:33,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:38:33,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:38:33,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:56,720 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (mod c_~a~0 4294967296)) (.cse1 (* 4294967296 (div c_~x_1~0 4294967296)))) (let ((.cse4 (let ((.cse8 (+ c_~x_2~0 c_~b~0 .cse1)) (.cse7 (* (div (+ c_~x_2~0 c_~b~0) 4294967296) 4294967296))) (and (<= (+ .cse7 c_~x_1~0) .cse8) (< .cse8 (+ .cse7 c_~x_1~0 1))))) (.cse5 (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) (mod c_~b~0 4294967296))) (.cse3 (< 0 .cse6)) (.cse0 (* 4294967296 (div c_~b~0 4294967296))) (.cse2 (+ c_~x_1~0 (* (div (+ (- 1) c_~b~0) 4294967296) 4294967296)))) (and (<= (+ .cse0 .cse1 1) .cse2) (<= (+ .cse0 c_~a~0) .cse2) (<= c_~x_1~0 c_~a~0) (or (not .cse3) .cse4 .cse5 (< 1 .cse6)) (= c_thread2Thread1of1ForFork1_~i~1 1) (or (< (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296) .cse6) .cse4 .cse5) .cse3 (= c_thread1Thread1of1ForFork0_~i~0 1) (<= (+ .cse0 (* (div (+ (- 2) c_~x_1~0) 4294967296) 4294967296) 4294967296) .cse2) (= c_~x_2~0 c_~b~0)))) is different from false [2022-11-18 18:39:09,080 INFO L130 PetriNetUnfolder]: 995/2995 cut-off events. [2022-11-18 18:39:09,081 INFO L131 PetriNetUnfolder]: For 41896/41896 co-relation queries the response was YES. [2022-11-18 18:39:09,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18824 conditions, 2995 events. 995/2995 cut-off events. For 41896/41896 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 26550 event pairs, 72 based on Foata normal form. 3/2992 useless extension candidates. Maximal degree in co-relation 18727. Up to 683 conditions per place. [2022-11-18 18:39:09,137 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 320 selfloop transitions, 772 changer transitions 33/1162 dead transitions. [2022-11-18 18:39:09,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1162 transitions, 19637 flow [2022-11-18 18:39:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-18 18:39:09,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-11-18 18:39:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 5973 transitions. [2022-11-18 18:39:09,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6436422413793104 [2022-11-18 18:39:09,149 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 5973 transitions. [2022-11-18 18:39:09,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 5973 transitions. [2022-11-18 18:39:09,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:39:09,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 5973 transitions. [2022-11-18 18:39:09,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 51.491379310344826) internal successors, (5973), 116 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:09,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 80.0) internal successors, (9360), 117 states have internal predecessors, (9360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:09,184 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 80.0) internal successors, (9360), 117 states have internal predecessors, (9360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:09,184 INFO L175 Difference]: Start difference. First operand has 415 places, 582 transitions, 8566 flow. Second operand 116 states and 5973 transitions. [2022-11-18 18:39:09,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1162 transitions, 19637 flow [2022-11-18 18:39:09,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1162 transitions, 17099 flow, removed 1177 selfloop flow, removed 35 redundant places. [2022-11-18 18:39:09,784 INFO L231 Difference]: Finished difference. Result has 541 places, 944 transitions, 15249 flow [2022-11-18 18:39:09,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=7395, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=15249, PETRI_PLACES=541, PETRI_TRANSITIONS=944} [2022-11-18 18:39:09,787 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 470 predicate places. [2022-11-18 18:39:09,787 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 944 transitions, 15249 flow [2022-11-18 18:39:09,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.60526315789474) internal successors, (1847), 38 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:09,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:39:09,789 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:09,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:09,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:39:09,993 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:39:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1051892825, now seen corresponding path program 5 times [2022-11-18 18:39:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:09,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768837635] [2022-11-18 18:39:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:09,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:11,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:11,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768837635] [2022-11-18 18:39:11,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768837635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:11,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441451480] [2022-11-18 18:39:11,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:39:11,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:11,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:11,675 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:11,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:39:11,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:39:11,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:39:11,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:39:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:13,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:23,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441451480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:23,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:23,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-18 18:39:23,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108902397] [2022-11-18 18:39:23,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:23,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 18:39:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 18:39:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:39:23,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:39:23,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 944 transitions, 15249 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:23,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:39:23,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:39:23,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:02,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:40:14,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:40:32,242 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 76 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:40:44,106 INFO L130 PetriNetUnfolder]: 1264/3806 cut-off events. [2022-11-18 18:40:44,106 INFO L131 PetriNetUnfolder]: For 80857/80857 co-relation queries the response was YES. [2022-11-18 18:40:44,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26293 conditions, 3806 events. 1264/3806 cut-off events. For 80857/80857 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 35373 event pairs, 69 based on Foata normal form. 5/3806 useless extension candidates. Maximal degree in co-relation 26155. Up to 740 conditions per place. [2022-11-18 18:40:44,168 INFO L137 encePairwiseOnDemand]: 57/80 looper letters, 294 selfloop transitions, 1160 changer transitions 40/1531 dead transitions. [2022-11-18 18:40:44,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 1531 transitions, 28590 flow [2022-11-18 18:40:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-11-18 18:40:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2022-11-18 18:40:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 8364 transitions. [2022-11-18 18:40:44,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6375 [2022-11-18 18:40:44,184 INFO L72 ComplementDD]: Start complementDD. Operand 164 states and 8364 transitions. [2022-11-18 18:40:44,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 164 states and 8364 transitions. [2022-11-18 18:40:44,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:44,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 164 states and 8364 transitions. [2022-11-18 18:40:44,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 165 states, 164 states have (on average 51.0) internal successors, (8364), 164 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:44,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 165 states, 165 states have (on average 80.0) internal successors, (13200), 165 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:44,236 INFO L81 ComplementDD]: Finished complementDD. Result has 165 states, 165 states have (on average 80.0) internal successors, (13200), 165 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:44,236 INFO L175 Difference]: Start difference. First operand has 541 places, 944 transitions, 15249 flow. Second operand 164 states and 8364 transitions. [2022-11-18 18:40:44,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 1531 transitions, 28590 flow [2022-11-18 18:40:45,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 1531 transitions, 26137 flow, removed 846 selfloop flow, removed 34 redundant places. [2022-11-18 18:40:45,588 INFO L231 Difference]: Finished difference. Result has 709 places, 1307 transitions, 23730 flow [2022-11-18 18:40:45,589 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=13933, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=826, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=164, PETRI_FLOW=23730, PETRI_PLACES=709, PETRI_TRANSITIONS=1307} [2022-11-18 18:40:45,589 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 638 predicate places. [2022-11-18 18:40:45,590 INFO L495 AbstractCegarLoop]: Abstraction has has 709 places, 1307 transitions, 23730 flow [2022-11-18 18:40:45,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:45,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:45,590 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:40:45,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:45,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:40:45,792 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:45,792 INFO L85 PathProgramCache]: Analyzing trace with hash 480518359, now seen corresponding path program 6 times [2022-11-18 18:40:45,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:45,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813272193] [2022-11-18 18:40:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:45,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:47,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:47,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813272193] [2022-11-18 18:40:47,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813272193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:40:47,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94859214] [2022-11-18 18:40:47,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:40:47,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:47,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:47,551 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:47,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:40:47,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:40:47,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:40:47,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:40:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:49,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:41:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:41:03,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94859214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:41:03,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:41:03,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-11-18 18:41:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527342276] [2022-11-18 18:41:03,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:41:03,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 18:41:03,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 18:41:03,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1270, Unknown=3, NotChecked=0, Total=1482 [2022-11-18 18:41:03,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:41:03,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 1307 transitions, 23730 flow. Second operand has 39 states, 39 states have (on average 48.58974358974359) internal successors, (1895), 39 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:03,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:03,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:41:03,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:39,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:42:02,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:42:26,172 WARN L233 SmtUtils]: Spent 9.82s on a formula simplification. DAG size of input: 91 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:42:49,666 WARN L233 SmtUtils]: Spent 14.14s on a formula simplification. DAG size of input: 93 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:42:50,048 INFO L130 PetriNetUnfolder]: 1555/4875 cut-off events. [2022-11-18 18:42:50,048 INFO L131 PetriNetUnfolder]: For 127034/127034 co-relation queries the response was YES. [2022-11-18 18:42:50,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36482 conditions, 4875 events. 1555/4875 cut-off events. For 127034/127034 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 48807 event pairs, 141 based on Foata normal form. 2/4849 useless extension candidates. Maximal degree in co-relation 36305. Up to 1676 conditions per place. [2022-11-18 18:42:50,143 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 786 selfloop transitions, 1120 changer transitions 19/1962 dead transitions. [2022-11-18 18:42:50,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 1962 transitions, 40544 flow [2022-11-18 18:42:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-18 18:42:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2022-11-18 18:42:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 5573 transitions. [2022-11-18 18:42:50,153 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.639105504587156 [2022-11-18 18:42:50,153 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 5573 transitions. [2022-11-18 18:42:50,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 5573 transitions. [2022-11-18 18:42:50,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:42:50,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 5573 transitions. [2022-11-18 18:42:50,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 51.12844036697248) internal successors, (5573), 109 states have internal predecessors, (5573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:50,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 80.0) internal successors, (8800), 110 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:50,186 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 80.0) internal successors, (8800), 110 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:50,186 INFO L175 Difference]: Start difference. First operand has 709 places, 1307 transitions, 23730 flow. Second operand 109 states and 5573 transitions. [2022-11-18 18:42:50,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 805 places, 1962 transitions, 40544 flow [2022-11-18 18:42:52,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 1962 transitions, 35850 flow, removed 1782 selfloop flow, removed 81 redundant places. [2022-11-18 18:42:52,772 INFO L231 Difference]: Finished difference. Result has 769 places, 1714 transitions, 33918 flow [2022-11-18 18:42:52,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=21332, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=739, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=33918, PETRI_PLACES=769, PETRI_TRANSITIONS=1714} [2022-11-18 18:42:52,773 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 698 predicate places. [2022-11-18 18:42:52,774 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 1714 transitions, 33918 flow [2022-11-18 18:42:52,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 48.58974358974359) internal successors, (1895), 39 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:52,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:42:52,775 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:52,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-18 18:42:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:52,982 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:42:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash 91299857, now seen corresponding path program 7 times [2022-11-18 18:42:52,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:52,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702345219] [2022-11-18 18:42:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:52,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:54,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702345219] [2022-11-18 18:42:54,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702345219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:42:54,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114596282] [2022-11-18 18:42:54,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:42:54,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:54,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:54,643 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:54,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:42:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:54,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:42:54,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:43:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:01,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114596282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:43:01,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:43:01,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-18 18:43:01,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645368637] [2022-11-18 18:43:01,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:43:01,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 18:43:01,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:43:01,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 18:43:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:43:01,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:43:01,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 1714 transitions, 33918 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:01,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:43:01,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:43:01,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:43:12,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:43:24,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:43:34,303 INFO L130 PetriNetUnfolder]: 1604/5039 cut-off events. [2022-11-18 18:43:34,303 INFO L131 PetriNetUnfolder]: For 96878/96878 co-relation queries the response was YES. [2022-11-18 18:43:34,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37513 conditions, 5039 events. 1604/5039 cut-off events. For 96878/96878 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 50992 event pairs, 168 based on Foata normal form. 2/5016 useless extension candidates. Maximal degree in co-relation 37316. Up to 1862 conditions per place. [2022-11-18 18:43:34,437 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 696 selfloop transitions, 1173 changer transitions 19/1925 dead transitions. [2022-11-18 18:43:34,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 1925 transitions, 40564 flow [2022-11-18 18:43:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-18 18:43:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-18 18:43:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4116 transitions. [2022-11-18 18:43:34,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6351851851851852 [2022-11-18 18:43:34,660 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4116 transitions. [2022-11-18 18:43:34,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4116 transitions. [2022-11-18 18:43:34,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:43:34,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4116 transitions. [2022-11-18 18:43:34,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 50.81481481481482) internal successors, (4116), 81 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:34,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 80.0) internal successors, (6560), 82 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:34,691 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 80.0) internal successors, (6560), 82 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:34,691 INFO L175 Difference]: Start difference. First operand has 769 places, 1714 transitions, 33918 flow. Second operand 81 states and 4116 transitions. [2022-11-18 18:43:34,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 1925 transitions, 40564 flow [2022-11-18 18:43:37,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 822 places, 1925 transitions, 37681 flow, removed 1397 selfloop flow, removed 21 redundant places. [2022-11-18 18:43:37,630 INFO L231 Difference]: Finished difference. Result has 834 places, 1786 transitions, 35216 flow [2022-11-18 18:43:37,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=31415, PETRI_DIFFERENCE_MINUEND_PLACES=742, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=35216, PETRI_PLACES=834, PETRI_TRANSITIONS=1786} [2022-11-18 18:43:37,633 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 763 predicate places. [2022-11-18 18:43:37,633 INFO L495 AbstractCegarLoop]: Abstraction has has 834 places, 1786 transitions, 35216 flow [2022-11-18 18:43:37,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:37,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:43:37,634 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:37,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:37,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:37,840 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:43:37,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash 365804139, now seen corresponding path program 8 times [2022-11-18 18:43:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:37,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580098355] [2022-11-18 18:43:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:37,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:39,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:43:39,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580098355] [2022-11-18 18:43:39,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580098355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:43:39,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696357304] [2022-11-18 18:43:39,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:43:39,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:39,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:39,724 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:39,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:43:39,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:43:39,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:43:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:43:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:43:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:43:41,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:03,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696357304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:03,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:03,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-11-18 18:44:03,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386915947] [2022-11-18 18:44:03,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:03,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 18:44:03,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:03,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 18:44:03,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1273, Unknown=6, NotChecked=0, Total=1482 [2022-11-18 18:44:03,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:44:03,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 1786 transitions, 35216 flow. Second operand has 39 states, 39 states have (on average 48.56410256410256) internal successors, (1894), 39 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:03,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:03,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:44:03,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:35,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:38,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:51,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:44:54,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:07,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:45:30,557 INFO L130 PetriNetUnfolder]: 1830/5617 cut-off events. [2022-11-18 18:45:30,557 INFO L131 PetriNetUnfolder]: For 88819/88819 co-relation queries the response was YES. [2022-11-18 18:45:30,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42272 conditions, 5617 events. 1830/5617 cut-off events. For 88819/88819 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 57301 event pairs, 179 based on Foata normal form. 7/5599 useless extension candidates. Maximal degree in co-relation 42074. Up to 1948 conditions per place. [2022-11-18 18:45:30,645 INFO L137 encePairwiseOnDemand]: 59/80 looper letters, 725 selfloop transitions, 1517 changer transitions 27/2306 dead transitions. [2022-11-18 18:45:30,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 958 places, 2306 transitions, 49178 flow [2022-11-18 18:45:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-18 18:45:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2022-11-18 18:45:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 6657 transitions. [2022-11-18 18:45:30,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6352099236641221 [2022-11-18 18:45:30,656 INFO L72 ComplementDD]: Start complementDD. Operand 131 states and 6657 transitions. [2022-11-18 18:45:30,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 131 states and 6657 transitions. [2022-11-18 18:45:30,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:30,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 131 states and 6657 transitions. [2022-11-18 18:45:30,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 132 states, 131 states have (on average 50.81679389312977) internal successors, (6657), 131 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:30,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 132 states, 132 states have (on average 80.0) internal successors, (10560), 132 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:30,685 INFO L81 ComplementDD]: Finished complementDD. Result has 132 states, 132 states have (on average 80.0) internal successors, (10560), 132 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:30,685 INFO L175 Difference]: Start difference. First operand has 834 places, 1786 transitions, 35216 flow. Second operand 131 states and 6657 transitions. [2022-11-18 18:45:30,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 958 places, 2306 transitions, 49178 flow [2022-11-18 18:45:33,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 914 places, 2306 transitions, 48084 flow, removed 292 selfloop flow, removed 44 redundant places. [2022-11-18 18:45:33,476 INFO L231 Difference]: Finished difference. Result has 933 places, 2111 transitions, 45458 flow [2022-11-18 18:45:33,479 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=34372, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=45458, PETRI_PLACES=933, PETRI_TRANSITIONS=2111} [2022-11-18 18:45:33,479 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 862 predicate places. [2022-11-18 18:45:33,480 INFO L495 AbstractCegarLoop]: Abstraction has has 933 places, 2111 transitions, 45458 flow [2022-11-18 18:45:33,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 48.56410256410256) internal successors, (1894), 39 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:33,480 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:33,480 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:33,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:33,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:45:33,687 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:45:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1178022003, now seen corresponding path program 9 times [2022-11-18 18:45:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:33,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326458171] [2022-11-18 18:45:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:33,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:35,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:35,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326458171] [2022-11-18 18:45:35,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326458171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:45:35,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069529919] [2022-11-18 18:45:35,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:45:35,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:45:35,435 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:45:35,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:45:35,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:45:35,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:35,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:45:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:37,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:41,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069529919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:41,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:45:41,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-18 18:45:41,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392793248] [2022-11-18 18:45:41,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:41,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 18:45:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 18:45:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:45:42,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:45:42,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 933 places, 2111 transitions, 45458 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:42,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:42,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:45:42,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:55,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:15,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:17,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:23,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:46:32,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:16,474 INFO L130 PetriNetUnfolder]: 2126/6484 cut-off events. [2022-11-18 18:47:16,474 INFO L131 PetriNetUnfolder]: For 114139/114139 co-relation queries the response was YES. [2022-11-18 18:47:16,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52500 conditions, 6484 events. 2126/6484 cut-off events. For 114139/114139 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 67662 event pairs, 192 based on Foata normal form. 3/6461 useless extension candidates. Maximal degree in co-relation 52295. Up to 2382 conditions per place. [2022-11-18 18:47:16,580 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 895 selfloop transitions, 1818 changer transitions 24/2774 dead transitions. [2022-11-18 18:47:16,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 2774 transitions, 64329 flow [2022-11-18 18:47:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-18 18:47:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2022-11-18 18:47:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 6293 transitions. [2022-11-18 18:47:16,590 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6395325203252032 [2022-11-18 18:47:16,591 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 6293 transitions. [2022-11-18 18:47:16,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 6293 transitions. [2022-11-18 18:47:16,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:47:16,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 6293 transitions. [2022-11-18 18:47:16,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 51.16260162601626) internal successors, (6293), 123 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:16,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 80.0) internal successors, (9920), 124 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:16,619 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 80.0) internal successors, (9920), 124 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:16,620 INFO L175 Difference]: Start difference. First operand has 933 places, 2111 transitions, 45458 flow. Second operand 123 states and 6293 transitions. [2022-11-18 18:47:16,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 2774 transitions, 64329 flow [2022-11-18 18:47:19,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 978 places, 2774 transitions, 62957 flow, removed 517 selfloop flow, removed 67 redundant places. [2022-11-18 18:47:19,622 INFO L231 Difference]: Finished difference. Result has 1007 places, 2574 transitions, 61543 flow [2022-11-18 18:47:19,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=44591, PETRI_DIFFERENCE_MINUEND_PLACES=856, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=61543, PETRI_PLACES=1007, PETRI_TRANSITIONS=2574} [2022-11-18 18:47:19,625 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 936 predicate places. [2022-11-18 18:47:19,626 INFO L495 AbstractCegarLoop]: Abstraction has has 1007 places, 2574 transitions, 61543 flow [2022-11-18 18:47:19,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:19,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:47:19,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:19,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:19,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:19,832 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:47:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:19,833 INFO L85 PathProgramCache]: Analyzing trace with hash 279113271, now seen corresponding path program 10 times [2022-11-18 18:47:19,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:19,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046906442] [2022-11-18 18:47:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:19,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:21,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:21,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046906442] [2022-11-18 18:47:21,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046906442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:21,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269749999] [2022-11-18 18:47:21,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:47:21,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:21,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:21,521 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:21,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:47:21,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:47:21,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:21,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:47:21,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:23,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:27,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269749999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:27,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:27,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-18 18:47:27,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993829942] [2022-11-18 18:47:27,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:27,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 18:47:27,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:27,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 18:47:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 18:47:27,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:47:27,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1007 places, 2574 transitions, 61543 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:27,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:47:27,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:47:27,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:47:38,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:45,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:47:57,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:04,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:23,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:31,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:48:36,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:09,497 INFO L130 PetriNetUnfolder]: 2266/7048 cut-off events. [2022-11-18 18:49:09,497 INFO L131 PetriNetUnfolder]: For 139308/139308 co-relation queries the response was YES. [2022-11-18 18:49:09,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59762 conditions, 7048 events. 2266/7048 cut-off events. For 139308/139308 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 75114 event pairs, 186 based on Foata normal form. 6/7032 useless extension candidates. Maximal degree in co-relation 59545. Up to 2327 conditions per place. [2022-11-18 18:49:09,635 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 868 selfloop transitions, 2068 changer transitions 32/3005 dead transitions. [2022-11-18 18:49:09,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1126 places, 3005 transitions, 75348 flow [2022-11-18 18:49:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-18 18:49:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2022-11-18 18:49:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 6592 transitions. [2022-11-18 18:49:09,649 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6387596899224807 [2022-11-18 18:49:09,649 INFO L72 ComplementDD]: Start complementDD. Operand 129 states and 6592 transitions. [2022-11-18 18:49:09,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 6592 transitions. [2022-11-18 18:49:09,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:49:09,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 129 states and 6592 transitions. [2022-11-18 18:49:09,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 130 states, 129 states have (on average 51.10077519379845) internal successors, (6592), 129 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:09,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 130 states, 130 states have (on average 80.0) internal successors, (10400), 130 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:09,679 INFO L81 ComplementDD]: Finished complementDD. Result has 130 states, 130 states have (on average 80.0) internal successors, (10400), 130 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:09,679 INFO L175 Difference]: Start difference. First operand has 1007 places, 2574 transitions, 61543 flow. Second operand 129 states and 6592 transitions. [2022-11-18 18:49:09,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1126 places, 3005 transitions, 75348 flow [2022-11-18 18:49:13,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1074 places, 3005 transitions, 73887 flow, removed 342 selfloop flow, removed 52 redundant places. [2022-11-18 18:49:13,935 INFO L231 Difference]: Finished difference. Result has 1103 places, 2793 transitions, 72434 flow [2022-11-18 18:49:13,937 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=60376, PETRI_DIFFERENCE_MINUEND_PLACES=946, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=129, PETRI_FLOW=72434, PETRI_PLACES=1103, PETRI_TRANSITIONS=2793} [2022-11-18 18:49:13,938 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 1032 predicate places. [2022-11-18 18:49:13,938 INFO L495 AbstractCegarLoop]: Abstraction has has 1103 places, 2793 transitions, 72434 flow [2022-11-18 18:49:13,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:13,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:13,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:13,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:14,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:14,139 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:49:14,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:14,139 INFO L85 PathProgramCache]: Analyzing trace with hash -347127231, now seen corresponding path program 11 times [2022-11-18 18:49:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:14,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323337160] [2022-11-18 18:49:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:15,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:15,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323337160] [2022-11-18 18:49:15,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323337160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:15,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553249271] [2022-11-18 18:49:15,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:49:15,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:15,688 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:15,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_633c6494-5250-48d4-b156-5aa15606b76c/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:49:15,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 18:49:15,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:15,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 18:49:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:17,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:26,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553249271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:26,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:26,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-11-18 18:49:26,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410530764] [2022-11-18 18:49:26,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:26,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 18:49:26,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:26,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 18:49:26,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 18:49:26,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-18 18:49:26,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 2793 transitions, 72434 flow. Second operand has 39 states, 39 states have (on average 48.56410256410256) internal successors, (1894), 39 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:26,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:26,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-18 18:49:26,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:49:33,250 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 85 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:49:36,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:49:42,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:01,681 WARN L233 SmtUtils]: Spent 8.72s on a formula simplification. DAG size of input: 86 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:50:10,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:12,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:50:30,011 WARN L233 SmtUtils]: Spent 12.56s on a formula simplification. DAG size of input: 97 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:50:32,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []