./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN --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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --- 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-6b4ec56 [2022-11-20 11:33:49,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:33:49,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:33:49,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:33:49,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:33:49,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:33:49,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:33:49,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:33:49,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:33:50,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:33:50,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:33:50,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:33:50,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:33:50,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:33:50,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:33:50,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:33:50,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:33:50,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:33:50,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:33:50,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:33:50,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:33:50,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:33:50,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:33:50,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:33:50,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:33:50,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:33:50,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:33:50,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:33:50,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:33:50,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:33:50,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:33:50,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:33:50,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:33:50,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:33:50,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:33:50,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:33:50,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:33:50,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:33:50,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:33:50,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:33:50,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:33:50,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:33:50,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:33:50,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:33:50,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:33:50,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:33:50,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:33:50,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:33:50,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:33:50,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:33:50,116 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:33:50,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:33:50,118 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:33:50,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:33:50,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:33:50,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:33:50,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:33:50,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:33:50,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:33:50,120 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:33:50,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:33:50,120 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:33:50,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:33:50,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:33:50,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:33:50,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:33:50,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:33:50,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:33:50,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:33:50,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:33:50,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:33:50,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:33:50,123 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:33:50,123 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:33:50,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:33:50,124 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_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2022-11-20 11:33:50,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:33:50,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:33:50,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:33:50,514 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:33:50,515 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:33:50,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-11-20 11:33:53,756 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:33:54,046 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:33:54,046 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-11-20 11:33:54,055 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/data/a1912c568/082332c6003643c79fe7f9fef53b1eac/FLAGf98052b69 [2022-11-20 11:33:54,071 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/data/a1912c568/082332c6003643c79fe7f9fef53b1eac [2022-11-20 11:33:54,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:33:54,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:33:54,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:33:54,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:33:54,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:33:54,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7196f8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54, skipping insertion in model container [2022-11-20 11:33:54,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:33:54,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:33:54,303 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-11-20 11:33:54,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:33:54,325 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:33:54,350 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-11-20 11:33:54,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:33:54,371 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:33:54,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54 WrapperNode [2022-11-20 11:33:54,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:33:54,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:33:54,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:33:54,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:33:54,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,420 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-11-20 11:33:54,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:33:54,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:33:54,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:33:54,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:33:54,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,453 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:33:54,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:33:54,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:33:54,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:33:54,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (1/1) ... [2022-11-20 11:33:54,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:33:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:54,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:33:54,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:33:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:33:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:33:54,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:33:54,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:33:54,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:33:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:33:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:33:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:33:54,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:33:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:33:54,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:33:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:33:54,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:33:54,572 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:33:54,785 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:33:54,787 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:33:55,219 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:33:55,239 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:33:55,240 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:33:55,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:55 BoogieIcfgContainer [2022-11-20 11:33:55,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:33:55,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:33:55,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:33:55,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:33:55,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:33:54" (1/3) ... [2022-11-20 11:33:55,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3aac81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:33:55, skipping insertion in model container [2022-11-20 11:33:55,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:54" (2/3) ... [2022-11-20 11:33:55,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3aac81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:33:55, skipping insertion in model container [2022-11-20 11:33:55,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:55" (3/3) ... [2022-11-20 11:33:55,254 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2022-11-20 11:33:55,266 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:33:55,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:33:55,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:33:55,280 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:33:55,382 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:33:55,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 185 transitions, 386 flow [2022-11-20 11:33:55,520 INFO L130 PetriNetUnfolder]: 15/183 cut-off events. [2022-11-20 11:33:55,520 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:33:55,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 15/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-11-20 11:33:55,528 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 185 transitions, 386 flow [2022-11-20 11:33:55,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 174 transitions, 360 flow [2022-11-20 11:33:55,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:33:55,554 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;@7b491ae5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:33:55,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 11:33:55,624 INFO L130 PetriNetUnfolder]: 13/155 cut-off events. [2022-11-20 11:33:55,625 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:33:55,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:55,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:55,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:33:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2038883078, now seen corresponding path program 1 times [2022-11-20 11:33:55,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:55,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708519024] [2022-11-20 11:33:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:55,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:56,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708519024] [2022-11-20 11:33:56,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708519024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:56,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:56,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:33:56,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814545154] [2022-11-20 11:33:56,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:56,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:33:56,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:33:56,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:33:56,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 185 [2022-11-20 11:33:56,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 174 transitions, 360 flow. Second operand has 2 states, 2 states have (on average 171.5) internal successors, (343), 2 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:56,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:56,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 185 [2022-11-20 11:33:56,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:56,148 INFO L130 PetriNetUnfolder]: 3/162 cut-off events. [2022-11-20 11:33:56,148 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 11:33:56,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 162 events. 3/162 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 15/165 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-11-20 11:33:56,151 INFO L137 encePairwiseOnDemand]: 173/185 looper letters, 4 selfloop transitions, 0 changer transitions 5/162 dead transitions. [2022-11-20 11:33:56,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 162 transitions, 344 flow [2022-11-20 11:33:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:33:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:33:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 352 transitions. [2022-11-20 11:33:56,178 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9513513513513514 [2022-11-20 11:33:56,179 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 352 transitions. [2022-11-20 11:33:56,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 352 transitions. [2022-11-20 11:33:56,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:56,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 352 transitions. [2022-11-20 11:33:56,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 176.0) internal successors, (352), 2 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:56,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:56,206 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:56,209 INFO L175 Difference]: Start difference. First operand has 166 places, 174 transitions, 360 flow. Second operand 2 states and 352 transitions. [2022-11-20 11:33:56,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 162 transitions, 344 flow [2022-11-20 11:33:56,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 162 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:33:56,227 INFO L231 Difference]: Finished difference. Result has 163 places, 157 transitions, 318 flow [2022-11-20 11:33:56,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=318, PETRI_PLACES=163, PETRI_TRANSITIONS=157} [2022-11-20 11:33:56,238 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, -3 predicate places. [2022-11-20 11:33:56,238 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 157 transitions, 318 flow [2022-11-20 11:33:56,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 171.5) internal successors, (343), 2 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:56,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:56,241 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:56,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:33:56,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:33:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1921775615, now seen corresponding path program 1 times [2022-11-20 11:33:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:56,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516666317] [2022-11-20 11:33:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:56,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:56,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516666317] [2022-11-20 11:33:56,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516666317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:56,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:56,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:33:56,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001049280] [2022-11-20 11:33:56,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:56,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:33:56,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:56,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:33:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:33:56,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 185 [2022-11-20 11:33:56,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 157 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:56,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:56,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 185 [2022-11-20 11:33:56,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:57,260 INFO L130 PetriNetUnfolder]: 20/291 cut-off events. [2022-11-20 11:33:57,261 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 11:33:57,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 291 events. 20/291 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 666 event pairs, 7 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 362. Up to 56 conditions per place. [2022-11-20 11:33:57,264 INFO L137 encePairwiseOnDemand]: 177/185 looper letters, 37 selfloop transitions, 7 changer transitions 0/161 dead transitions. [2022-11-20 11:33:57,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 161 transitions, 414 flow [2022-11-20 11:33:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:33:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:33:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1061 transitions. [2022-11-20 11:33:57,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7168918918918918 [2022-11-20 11:33:57,270 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1061 transitions. [2022-11-20 11:33:57,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1061 transitions. [2022-11-20 11:33:57,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:57,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1061 transitions. [2022-11-20 11:33:57,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:57,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:57,283 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:57,283 INFO L175 Difference]: Start difference. First operand has 163 places, 157 transitions, 318 flow. Second operand 8 states and 1061 transitions. [2022-11-20 11:33:57,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 161 transitions, 414 flow [2022-11-20 11:33:57,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 161 transitions, 414 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:33:57,292 INFO L231 Difference]: Finished difference. Result has 166 places, 158 transitions, 340 flow [2022-11-20 11:33:57,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=166, PETRI_TRANSITIONS=158} [2022-11-20 11:33:57,293 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 0 predicate places. [2022-11-20 11:33:57,294 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 158 transitions, 340 flow [2022-11-20 11:33:57,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:57,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:57,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:57,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:33:57,297 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:33:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash 379398891, now seen corresponding path program 1 times [2022-11-20 11:33:57,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115059084] [2022-11-20 11:33:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:33:57,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:57,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115059084] [2022-11-20 11:33:57,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115059084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:57,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:57,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:33:57,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776072584] [2022-11-20 11:33:57,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:57,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:33:57,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:33:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:33:57,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 185 [2022-11-20 11:33:57,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 158 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 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) [2022-11-20 11:33:57,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:57,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 185 [2022-11-20 11:33:57,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:58,121 INFO L130 PetriNetUnfolder]: 97/659 cut-off events. [2022-11-20 11:33:58,121 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-20 11:33:58,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 659 events. 97/659 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3415 event pairs, 29 based on Foata normal form. 1/611 useless extension candidates. Maximal degree in co-relation 898. Up to 106 conditions per place. [2022-11-20 11:33:58,129 INFO L137 encePairwiseOnDemand]: 178/185 looper letters, 59 selfloop transitions, 5 changer transitions 4/188 dead transitions. [2022-11-20 11:33:58,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 188 transitions, 541 flow [2022-11-20 11:33:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:33:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:33:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 843 transitions. [2022-11-20 11:33:58,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7594594594594595 [2022-11-20 11:33:58,132 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 843 transitions. [2022-11-20 11:33:58,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 843 transitions. [2022-11-20 11:33:58,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:58,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 843 transitions. [2022-11-20 11:33:58,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.5) internal successors, (843), 6 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:58,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:58,139 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:58,140 INFO L175 Difference]: Start difference. First operand has 166 places, 158 transitions, 340 flow. Second operand 6 states and 843 transitions. [2022-11-20 11:33:58,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 188 transitions, 541 flow [2022-11-20 11:33:58,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 188 transitions, 529 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 11:33:58,149 INFO L231 Difference]: Finished difference. Result has 168 places, 161 transitions, 357 flow [2022-11-20 11:33:58,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=168, PETRI_TRANSITIONS=161} [2022-11-20 11:33:58,152 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 2 predicate places. [2022-11-20 11:33:58,152 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 161 transitions, 357 flow [2022-11-20 11:33:58,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 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) [2022-11-20 11:33:58,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:58,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:58,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:33:58,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:33:58,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1505088180, now seen corresponding path program 1 times [2022-11-20 11:33:58,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:58,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197522949] [2022-11-20 11:33:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:33:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:58,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197522949] [2022-11-20 11:33:58,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197522949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:58,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:58,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:33:58,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625152120] [2022-11-20 11:33:58,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:58,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:33:58,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:58,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:33:58,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:33:58,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2022-11-20 11:33:58,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 161 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:58,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:58,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2022-11-20 11:33:58,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:58,710 INFO L130 PetriNetUnfolder]: 86/732 cut-off events. [2022-11-20 11:33:58,711 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 11:33:58,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 732 events. 86/732 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3673 event pairs, 40 based on Foata normal form. 0/653 useless extension candidates. Maximal degree in co-relation 974. Up to 141 conditions per place. [2022-11-20 11:33:58,718 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 23 selfloop transitions, 5 changer transitions 0/171 dead transitions. [2022-11-20 11:33:58,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 171 transitions, 436 flow [2022-11-20 11:33:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:33:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:33:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2022-11-20 11:33:58,721 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8637837837837837 [2022-11-20 11:33:58,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2022-11-20 11:33:58,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2022-11-20 11:33:58,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:58,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2022-11-20 11:33:58,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:58,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:58,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:58,734 INFO L175 Difference]: Start difference. First operand has 168 places, 161 transitions, 357 flow. Second operand 5 states and 799 transitions. [2022-11-20 11:33:58,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 171 transitions, 436 flow [2022-11-20 11:33:58,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 171 transitions, 432 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-20 11:33:58,741 INFO L231 Difference]: Finished difference. Result has 170 places, 163 transitions, 377 flow [2022-11-20 11:33:58,741 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=170, PETRI_TRANSITIONS=163} [2022-11-20 11:33:58,743 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 4 predicate places. [2022-11-20 11:33:58,743 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 163 transitions, 377 flow [2022-11-20 11:33:58,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:58,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:58,747 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:58,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:33:58,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:33:58,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:58,750 INFO L85 PathProgramCache]: Analyzing trace with hash 575136040, now seen corresponding path program 2 times [2022-11-20 11:33:58,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:58,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306108328] [2022-11-20 11:33:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:58,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:33:59,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306108328] [2022-11-20 11:33:59,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306108328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:59,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260573113] [2022-11-20 11:33:59,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:33:59,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:59,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:59,149 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:59,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:33:59,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:33:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:59,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:33:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:33:59,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:33:59,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260573113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:59,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:33:59,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-20 11:33:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792190357] [2022-11-20 11:33:59,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:59,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:33:59,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:33:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:33:59,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2022-11-20 11:33:59,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 163 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:59,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:59,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2022-11-20 11:33:59,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:59,811 INFO L130 PetriNetUnfolder]: 98/820 cut-off events. [2022-11-20 11:33:59,811 INFO L131 PetriNetUnfolder]: For 99/100 co-relation queries the response was YES. [2022-11-20 11:33:59,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 820 events. 98/820 cut-off events. For 99/100 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4484 event pairs, 37 based on Foata normal form. 4/774 useless extension candidates. Maximal degree in co-relation 1183. Up to 175 conditions per place. [2022-11-20 11:33:59,821 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 28 selfloop transitions, 4 changer transitions 2/177 dead transitions. [2022-11-20 11:33:59,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 177 transitions, 491 flow [2022-11-20 11:33:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:33:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:33:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2022-11-20 11:33:59,848 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8770270270270271 [2022-11-20 11:33:59,848 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2022-11-20 11:33:59,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2022-11-20 11:33:59,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:59,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2022-11-20 11:33:59,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:59,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:59,854 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:59,854 INFO L175 Difference]: Start difference. First operand has 170 places, 163 transitions, 377 flow. Second operand 4 states and 649 transitions. [2022-11-20 11:33:59,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 177 transitions, 491 flow [2022-11-20 11:33:59,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 177 transitions, 483 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:33:59,860 INFO L231 Difference]: Finished difference. Result has 174 places, 167 transitions, 411 flow [2022-11-20 11:33:59,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=411, PETRI_PLACES=174, PETRI_TRANSITIONS=167} [2022-11-20 11:33:59,864 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 8 predicate places. [2022-11-20 11:33:59,864 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 167 transitions, 411 flow [2022-11-20 11:33:59,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:59,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:59,865 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:59,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:00,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:00,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:34:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:00,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2081269022, now seen corresponding path program 3 times [2022-11-20 11:34:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:00,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976349580] [2022-11-20 11:34:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:00,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:34:00,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:00,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976349580] [2022-11-20 11:34:00,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976349580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:00,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729727029] [2022-11-20 11:34:00,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:34:00,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:00,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:34:00,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:34:00,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:34:00,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:34:00,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:00,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:34:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:34:00,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:34:00,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729727029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:34:00,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:34:00,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-20 11:34:00,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166044792] [2022-11-20 11:34:00,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:34:00,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:34:00,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:34:00,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:34:00,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2022-11-20 11:34:00,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 167 transitions, 411 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:00,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:00,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2022-11-20 11:34:00,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:01,113 INFO L130 PetriNetUnfolder]: 121/842 cut-off events. [2022-11-20 11:34:01,113 INFO L131 PetriNetUnfolder]: For 253/256 co-relation queries the response was YES. [2022-11-20 11:34:01,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 842 events. 121/842 cut-off events. For 253/256 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4467 event pairs, 26 based on Foata normal form. 4/797 useless extension candidates. Maximal degree in co-relation 1311. Up to 163 conditions per place. [2022-11-20 11:34:01,121 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 25 selfloop transitions, 8 changer transitions 2/178 dead transitions. [2022-11-20 11:34:01,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 178 transitions, 524 flow [2022-11-20 11:34:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:34:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:34:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 647 transitions. [2022-11-20 11:34:01,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8743243243243243 [2022-11-20 11:34:01,124 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 647 transitions. [2022-11-20 11:34:01,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 647 transitions. [2022-11-20 11:34:01,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:01,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 647 transitions. [2022-11-20 11:34:01,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,130 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,130 INFO L175 Difference]: Start difference. First operand has 174 places, 167 transitions, 411 flow. Second operand 4 states and 647 transitions. [2022-11-20 11:34:01,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 178 transitions, 524 flow [2022-11-20 11:34:01,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 178 transitions, 518 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-20 11:34:01,140 INFO L231 Difference]: Finished difference. Result has 178 places, 169 transitions, 445 flow [2022-11-20 11:34:01,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=445, PETRI_PLACES=178, PETRI_TRANSITIONS=169} [2022-11-20 11:34:01,144 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 12 predicate places. [2022-11-20 11:34:01,144 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 169 transitions, 445 flow [2022-11-20 11:34:01,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:01,145 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:01,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:01,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:34:01,352 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:34:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash -759950446, now seen corresponding path program 1 times [2022-11-20 11:34:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:01,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472474555] [2022-11-20 11:34:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:34:01,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:01,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472474555] [2022-11-20 11:34:01,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472474555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:34:01,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:34:01,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:34:01,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396585591] [2022-11-20 11:34:01,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:34:01,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:34:01,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:01,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:34:01,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:34:01,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 185 [2022-11-20 11:34:01,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 169 transitions, 445 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:01,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 185 [2022-11-20 11:34:01,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:01,755 INFO L130 PetriNetUnfolder]: 64/693 cut-off events. [2022-11-20 11:34:01,755 INFO L131 PetriNetUnfolder]: For 235/266 co-relation queries the response was YES. [2022-11-20 11:34:01,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 693 events. 64/693 cut-off events. For 235/266 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3356 event pairs, 10 based on Foata normal form. 16/665 useless extension candidates. Maximal degree in co-relation 1045. Up to 85 conditions per place. [2022-11-20 11:34:01,762 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 26 selfloop transitions, 5 changer transitions 1/182 dead transitions. [2022-11-20 11:34:01,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 182 transitions, 563 flow [2022-11-20 11:34:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:34:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:34:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2022-11-20 11:34:01,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8821621621621621 [2022-11-20 11:34:01,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2022-11-20 11:34:01,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2022-11-20 11:34:01,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:01,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2022-11-20 11:34:01,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,772 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,772 INFO L175 Difference]: Start difference. First operand has 178 places, 169 transitions, 445 flow. Second operand 5 states and 816 transitions. [2022-11-20 11:34:01,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 182 transitions, 563 flow [2022-11-20 11:34:01,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 182 transitions, 549 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-20 11:34:01,778 INFO L231 Difference]: Finished difference. Result has 180 places, 171 transitions, 457 flow [2022-11-20 11:34:01,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=180, PETRI_TRANSITIONS=171} [2022-11-20 11:34:01,779 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 14 predicate places. [2022-11-20 11:34:01,780 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 171 transitions, 457 flow [2022-11-20 11:34:01,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:01,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:01,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:34:01,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:34:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1395465320, now seen corresponding path program 2 times [2022-11-20 11:34:01,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:01,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38556314] [2022-11-20 11:34:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:01,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:34:02,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:02,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38556314] [2022-11-20 11:34:02,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38556314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:02,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046467438] [2022-11-20 11:34:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:34:02,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:34:02,142 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:34:02,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:34:02,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:34:02,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:34:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:34:02,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:34:03,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046467438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:03,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:34:03,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-20 11:34:03,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378934703] [2022-11-20 11:34:03,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:03,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:34:03,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:03,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:34:03,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:34:03,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-11-20 11:34:03,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 171 transitions, 457 flow. Second operand has 9 states, 9 states have (on average 154.55555555555554) internal successors, (1391), 9 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:03,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:03,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-11-20 11:34:03,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:03,421 INFO L130 PetriNetUnfolder]: 191/1169 cut-off events. [2022-11-20 11:34:03,421 INFO L131 PetriNetUnfolder]: For 590/597 co-relation queries the response was YES. [2022-11-20 11:34:03,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2071 conditions, 1169 events. 191/1169 cut-off events. For 590/597 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7010 event pairs, 43 based on Foata normal form. 14/1111 useless extension candidates. Maximal degree in co-relation 2057. Up to 138 conditions per place. [2022-11-20 11:34:03,433 INFO L137 encePairwiseOnDemand]: 178/185 looper letters, 65 selfloop transitions, 17 changer transitions 2/224 dead transitions. [2022-11-20 11:34:03,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 224 transitions, 874 flow [2022-11-20 11:34:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:34:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:34:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1127 transitions. [2022-11-20 11:34:03,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8702702702702703 [2022-11-20 11:34:03,437 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1127 transitions. [2022-11-20 11:34:03,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1127 transitions. [2022-11-20 11:34:03,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:03,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1127 transitions. [2022-11-20 11:34:03,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 161.0) internal successors, (1127), 7 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:03,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:03,445 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:03,445 INFO L175 Difference]: Start difference. First operand has 180 places, 171 transitions, 457 flow. Second operand 7 states and 1127 transitions. [2022-11-20 11:34:03,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 224 transitions, 874 flow [2022-11-20 11:34:03,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 224 transitions, 867 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:34:03,453 INFO L231 Difference]: Finished difference. Result has 188 places, 182 transitions, 618 flow [2022-11-20 11:34:03,453 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=188, PETRI_TRANSITIONS=182} [2022-11-20 11:34:03,454 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 22 predicate places. [2022-11-20 11:34:03,454 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 182 transitions, 618 flow [2022-11-20 11:34:03,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 154.55555555555554) internal successors, (1391), 9 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:03,455 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:03,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:03,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:03,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:03,663 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:34:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1927071568, now seen corresponding path program 3 times [2022-11-20 11:34:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:03,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206718325] [2022-11-20 11:34:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:03,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:34:03,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:03,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206718325] [2022-11-20 11:34:03,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206718325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:34:03,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:34:03,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:34:03,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833919599] [2022-11-20 11:34:03,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:34:03,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:34:03,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:03,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:34:03,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:34:03,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-11-20 11:34:03,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 182 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:03,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:03,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-11-20 11:34:03,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:04,295 INFO L130 PetriNetUnfolder]: 224/1430 cut-off events. [2022-11-20 11:34:04,296 INFO L131 PetriNetUnfolder]: For 1494/1499 co-relation queries the response was YES. [2022-11-20 11:34:04,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2778 conditions, 1430 events. 224/1430 cut-off events. For 1494/1499 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 9238 event pairs, 80 based on Foata normal form. 10/1344 useless extension candidates. Maximal degree in co-relation 2761. Up to 264 conditions per place. [2022-11-20 11:34:04,310 INFO L137 encePairwiseOnDemand]: 178/185 looper letters, 57 selfloop transitions, 19 changer transitions 1/217 dead transitions. [2022-11-20 11:34:04,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 217 transitions, 977 flow [2022-11-20 11:34:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:34:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:34:04,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 961 transitions. [2022-11-20 11:34:04,314 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8657657657657658 [2022-11-20 11:34:04,314 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 961 transitions. [2022-11-20 11:34:04,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 961 transitions. [2022-11-20 11:34:04,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:04,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 961 transitions. [2022-11-20 11:34:04,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.16666666666666) internal successors, (961), 6 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:04,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:04,322 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:04,322 INFO L175 Difference]: Start difference. First operand has 188 places, 182 transitions, 618 flow. Second operand 6 states and 961 transitions. [2022-11-20 11:34:04,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 217 transitions, 977 flow [2022-11-20 11:34:04,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 217 transitions, 971 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-20 11:34:04,336 INFO L231 Difference]: Finished difference. Result has 196 places, 186 transitions, 714 flow [2022-11-20 11:34:04,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=714, PETRI_PLACES=196, PETRI_TRANSITIONS=186} [2022-11-20 11:34:04,337 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 30 predicate places. [2022-11-20 11:34:04,337 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 186 transitions, 714 flow [2022-11-20 11:34:04,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:04,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:04,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:04,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:34:04,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:34:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1439286922, now seen corresponding path program 4 times [2022-11-20 11:34:04,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:04,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446343340] [2022-11-20 11:34:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:04,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:34:04,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:04,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446343340] [2022-11-20 11:34:04,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446343340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:34:04,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:34:04,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:34:04,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378485109] [2022-11-20 11:34:04,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:34:04,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:34:04,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:34:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:34:04,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-11-20 11:34:04,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 186 transitions, 714 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:04,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:04,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-11-20 11:34:04,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:05,061 INFO L130 PetriNetUnfolder]: 234/1467 cut-off events. [2022-11-20 11:34:05,062 INFO L131 PetriNetUnfolder]: For 2030/2032 co-relation queries the response was YES. [2022-11-20 11:34:05,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3024 conditions, 1467 events. 234/1467 cut-off events. For 2030/2032 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9491 event pairs, 64 based on Foata normal form. 10/1378 useless extension candidates. Maximal degree in co-relation 3003. Up to 204 conditions per place. [2022-11-20 11:34:05,077 INFO L137 encePairwiseOnDemand]: 178/185 looper letters, 51 selfloop transitions, 20 changer transitions 4/215 dead transitions. [2022-11-20 11:34:05,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 215 transitions, 1030 flow [2022-11-20 11:34:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:34:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:34:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1115 transitions. [2022-11-20 11:34:05,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.861003861003861 [2022-11-20 11:34:05,081 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1115 transitions. [2022-11-20 11:34:05,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1115 transitions. [2022-11-20 11:34:05,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:05,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1115 transitions. [2022-11-20 11:34:05,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.28571428571428) internal successors, (1115), 7 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:05,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:05,087 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:05,088 INFO L175 Difference]: Start difference. First operand has 196 places, 186 transitions, 714 flow. Second operand 7 states and 1115 transitions. [2022-11-20 11:34:05,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 215 transitions, 1030 flow [2022-11-20 11:34:05,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 215 transitions, 986 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-20 11:34:05,100 INFO L231 Difference]: Finished difference. Result has 201 places, 187 transitions, 740 flow [2022-11-20 11:34:05,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=740, PETRI_PLACES=201, PETRI_TRANSITIONS=187} [2022-11-20 11:34:05,101 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 35 predicate places. [2022-11-20 11:34:05,102 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 187 transitions, 740 flow [2022-11-20 11:34:05,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:05,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:05,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:05,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:34:05,103 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:34:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:05,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1706357371, now seen corresponding path program 1 times [2022-11-20 11:34:05,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:05,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064713818] [2022-11-20 11:34:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:05,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:34:05,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:05,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064713818] [2022-11-20 11:34:05,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064713818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:05,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246975944] [2022-11-20 11:34:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:05,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:05,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:34:05,835 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:34:05,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:34:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:05,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:34:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:06,896 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 11:34:06,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-20 11:34:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:07,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:07,808 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 11:34:07,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 11:34:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:08,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246975944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:08,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:34:08,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 18] total 36 [2022-11-20 11:34:08,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662934740] [2022-11-20 11:34:08,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:08,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:34:08,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:08,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:34:08,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:34:09,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 185 [2022-11-20 11:34:09,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 187 transitions, 740 flow. Second operand has 36 states, 36 states have (on average 89.97222222222223) internal successors, (3239), 36 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:09,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:09,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 185 [2022-11-20 11:34:09,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:38,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:34:44,681 INFO L130 PetriNetUnfolder]: 14322/30951 cut-off events. [2022-11-20 11:34:44,681 INFO L131 PetriNetUnfolder]: For 33655/33833 co-relation queries the response was YES. [2022-11-20 11:34:44,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71479 conditions, 30951 events. 14322/30951 cut-off events. For 33655/33833 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 285463 event pairs, 630 based on Foata normal form. 448/29673 useless extension candidates. Maximal degree in co-relation 71456. Up to 4835 conditions per place. [2022-11-20 11:34:44,987 INFO L137 encePairwiseOnDemand]: 133/185 looper letters, 1220 selfloop transitions, 594 changer transitions 331/2227 dead transitions. [2022-11-20 11:34:44,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 2227 transitions, 11401 flow [2022-11-20 11:34:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-11-20 11:34:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2022-11-20 11:34:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 21998 transitions. [2022-11-20 11:34:45,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5017219751396966 [2022-11-20 11:34:45,044 INFO L72 ComplementDD]: Start complementDD. Operand 237 states and 21998 transitions. [2022-11-20 11:34:45,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 237 states and 21998 transitions. [2022-11-20 11:34:45,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:45,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 237 states and 21998 transitions. [2022-11-20 11:34:45,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 238 states, 237 states have (on average 92.81856540084388) internal successors, (21998), 237 states have internal predecessors, (21998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:45,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 238 states, 238 states have (on average 185.0) internal successors, (44030), 238 states have internal predecessors, (44030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:45,314 INFO L81 ComplementDD]: Finished complementDD. Result has 238 states, 238 states have (on average 185.0) internal successors, (44030), 238 states have internal predecessors, (44030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:45,315 INFO L175 Difference]: Start difference. First operand has 201 places, 187 transitions, 740 flow. Second operand 237 states and 21998 transitions. [2022-11-20 11:34:45,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 2227 transitions, 11401 flow [2022-11-20 11:34:45,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 2227 transitions, 11125 flow, removed 53 selfloop flow, removed 7 redundant places. [2022-11-20 11:34:45,473 INFO L231 Difference]: Finished difference. Result has 600 places, 801 transitions, 6061 flow [2022-11-20 11:34:45,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=237, PETRI_FLOW=6061, PETRI_PLACES=600, PETRI_TRANSITIONS=801} [2022-11-20 11:34:45,475 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, 434 predicate places. [2022-11-20 11:34:45,475 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 801 transitions, 6061 flow [2022-11-20 11:34:45,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 89.97222222222223) internal successors, (3239), 36 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:45,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:45,477 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:45,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:45,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d8398d-7002-478e-bc61-8ec726c58f77/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:45,685 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:34:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:45,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1866407086, now seen corresponding path program 2 times [2022-11-20 11:34:45,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:45,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247204050] [2022-11-20 11:34:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:45,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat