./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8 --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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- 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-e04fb08 [2022-11-16 12:47:46,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:47:46,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:47:46,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:47:46,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:47:46,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:47:46,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:47:46,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:47:46,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:47:46,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:47:46,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:47:46,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:47:46,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:47:46,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:47:46,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:47:46,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:47:46,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:47:46,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:47:46,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:47:46,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:47:46,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:47:46,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:47:46,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:47:46,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:47:46,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:47:46,530 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:47:46,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:47:46,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:47:46,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:47:46,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:47:46,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:47:46,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:47:46,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:47:46,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:47:46,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:47:46,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:47:46,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:47:46,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:47:46,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:47:46,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:47:46,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:47:46,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:47:46,583 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:47:46,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:47:46,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:47:46,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:47:46,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:47:46,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:47:46,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:47:46,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:47:46,586 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:47:46,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:47:46,587 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:47:46,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:47:46,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:47:46,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:47:46,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:47:46,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:47:46,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:47:46,589 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:47:46,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:47:46,589 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:47:46,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:47:46,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:47:46,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:47:46,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:47:46,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:47:46,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:47:46,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:47:46,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:47:46,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:47:46,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:47:46,592 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:47:46,593 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:47:46,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:47:46,593 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_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2022-11-16 12:47:46,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:47:46,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:47:46,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:47:46,876 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:47:46,877 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:47:46,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-11-16 12:47:46,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/data/99609b7a8/2a9966a534ea4b7abef81dd758d06064/FLAG7008726f8 [2022-11-16 12:47:47,529 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:47:47,530 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-11-16 12:47:47,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/data/99609b7a8/2a9966a534ea4b7abef81dd758d06064/FLAG7008726f8 [2022-11-16 12:47:47,842 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/data/99609b7a8/2a9966a534ea4b7abef81dd758d06064 [2022-11-16 12:47:47,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:47:47,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:47:47,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:47:47,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:47:47,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:47:47,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:47:47" (1/1) ... [2022-11-16 12:47:47,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5b605b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:47, skipping insertion in model container [2022-11-16 12:47:47,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:47:47" (1/1) ... [2022-11-16 12:47:47,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:47:47,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:47:48,248 WARN L229 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_90102d19-ffe8-4e69-afff-7db159c9fc28/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-11-16 12:47:48,258 WARN L229 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_90102d19-ffe8-4e69-afff-7db159c9fc28/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-11-16 12:47:48,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:47:48,274 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:47:48,317 WARN L229 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_90102d19-ffe8-4e69-afff-7db159c9fc28/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-11-16 12:47:48,321 WARN L229 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_90102d19-ffe8-4e69-afff-7db159c9fc28/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-11-16 12:47:48,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:47:48,374 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:47:48,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48 WrapperNode [2022-11-16 12:47:48,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:47:48,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:47:48,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:47:48,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:47:48,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,460 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2022-11-16 12:47:48,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:47:48,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:47:48,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:47:48,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:47:48,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,514 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:47:48,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:47:48,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:47:48,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:47:48,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (1/1) ... [2022-11-16 12:47:48,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:47:48,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:48,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:48,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:47:48,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:47:48,645 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-16 12:47:48,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-16 12:47:48,645 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-16 12:47:48,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-16 12:47:48,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:47:48,646 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 12:47:48,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:47:48,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:47:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:47:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 12:47:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:47:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:47:48,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:47:48,649 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:47:48,856 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:47:48,858 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:47:49,159 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:47:49,167 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:47:49,168 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:47:49,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:47:49 BoogieIcfgContainer [2022-11-16 12:47:49,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:47:49,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:47:49,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:47:49,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:47:49,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:47:47" (1/3) ... [2022-11-16 12:47:49,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e24fc53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:47:49, skipping insertion in model container [2022-11-16 12:47:49,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:48" (2/3) ... [2022-11-16 12:47:49,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e24fc53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:47:49, skipping insertion in model container [2022-11-16 12:47:49,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:47:49" (3/3) ... [2022-11-16 12:47:49,180 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2022-11-16 12:47:49,189 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:47:49,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:47:49,200 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 12:47:49,200 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:47:49,353 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:47:49,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 150 transitions, 316 flow [2022-11-16 12:47:49,471 INFO L130 PetriNetUnfolder]: 10/148 cut-off events. [2022-11-16 12:47:49,471 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:47:49,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 10/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 254 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-11-16 12:47:49,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 150 transitions, 316 flow [2022-11-16 12:47:49,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 138 transitions, 285 flow [2022-11-16 12:47:49,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:47:49,518 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;@1d91992e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:47:49,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-16 12:47:49,560 INFO L130 PetriNetUnfolder]: 5/109 cut-off events. [2022-11-16 12:47:49,567 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:47:49,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:49,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:49,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:47:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:49,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1292919319, now seen corresponding path program 1 times [2022-11-16 12:47:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881899411] [2022-11-16 12:47:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:49,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:49,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:49,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886643927] [2022-11-16 12:47:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:49,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:49,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:49,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:49,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:47:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:50,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:47:50,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:50,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:50,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:50,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881899411] [2022-11-16 12:47:50,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:50,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886643927] [2022-11-16 12:47:50,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886643927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:50,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:50,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:47:50,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209931021] [2022-11-16 12:47:50,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:50,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:47:50,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:47:50,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:47:50,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 150 [2022-11-16 12:47:50,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 138 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:50,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:47:50,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 150 [2022-11-16 12:47:50,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:47:50,433 INFO L130 PetriNetUnfolder]: 34/287 cut-off events. [2022-11-16 12:47:50,433 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 12:47:50,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 287 events. 34/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1134 event pairs, 8 based on Foata normal form. 20/279 useless extension candidates. Maximal degree in co-relation 283. Up to 32 conditions per place. [2022-11-16 12:47:50,438 INFO L137 encePairwiseOnDemand]: 140/150 looper letters, 15 selfloop transitions, 7 changer transitions 0/137 dead transitions. [2022-11-16 12:47:50,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 137 transitions, 333 flow [2022-11-16 12:47:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:47:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:47:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 539 transitions. [2022-11-16 12:47:50,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8983333333333333 [2022-11-16 12:47:50,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 539 transitions. [2022-11-16 12:47:50,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 539 transitions. [2022-11-16 12:47:50,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:47:50,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 539 transitions. [2022-11-16 12:47:50,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:50,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:50,470 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:50,472 INFO L175 Difference]: Start difference. First operand has 135 places, 138 transitions, 285 flow. Second operand 4 states and 539 transitions. [2022-11-16 12:47:50,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 137 transitions, 333 flow [2022-11-16 12:47:50,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 137 transitions, 326 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 12:47:50,480 INFO L231 Difference]: Finished difference. Result has 132 places, 134 transitions, 299 flow [2022-11-16 12:47:50,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=299, PETRI_PLACES=132, PETRI_TRANSITIONS=134} [2022-11-16 12:47:50,485 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -3 predicate places. [2022-11-16 12:47:50,486 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 134 transitions, 299 flow [2022-11-16 12:47:50,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:50,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:50,487 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] [2022-11-16 12:47:50,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:50,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 12:47:50,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:47:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:50,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1782579319, now seen corresponding path program 1 times [2022-11-16 12:47:50,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:50,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122866792] [2022-11-16 12:47:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:50,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:51,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:51,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122866792] [2022-11-16 12:47:51,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122866792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:51,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:51,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:47:51,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676630104] [2022-11-16 12:47:51,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:51,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:51,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:51,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:51,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:51,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 150 [2022-11-16 12:47:51,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 134 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:47:51,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 150 [2022-11-16 12:47:51,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:47:51,244 INFO L130 PetriNetUnfolder]: 47/421 cut-off events. [2022-11-16 12:47:51,244 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-16 12:47:51,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 421 events. 47/421 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1545 event pairs, 5 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 333. Up to 27 conditions per place. [2022-11-16 12:47:51,251 INFO L137 encePairwiseOnDemand]: 146/150 looper letters, 12 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2022-11-16 12:47:51,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 139 transitions, 349 flow [2022-11-16 12:47:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:47:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2022-11-16 12:47:51,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9244444444444444 [2022-11-16 12:47:51,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2022-11-16 12:47:51,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2022-11-16 12:47:51,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:47:51,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2022-11-16 12:47:51,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,261 INFO L175 Difference]: Start difference. First operand has 132 places, 134 transitions, 299 flow. Second operand 3 states and 416 transitions. [2022-11-16 12:47:51,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 139 transitions, 349 flow [2022-11-16 12:47:51,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 139 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:47:51,268 INFO L231 Difference]: Finished difference. Result has 134 places, 135 transitions, 311 flow [2022-11-16 12:47:51,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=134, PETRI_TRANSITIONS=135} [2022-11-16 12:47:51,270 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -1 predicate places. [2022-11-16 12:47:51,270 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 135 transitions, 311 flow [2022-11-16 12:47:51,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:51,271 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] [2022-11-16 12:47:51,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:47:51,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:47:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1817279563, now seen corresponding path program 1 times [2022-11-16 12:47:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:51,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941591024] [2022-11-16 12:47:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:51,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941591024] [2022-11-16 12:47:51,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941591024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:51,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:51,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:47:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386943074] [2022-11-16 12:47:51,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:51,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:51,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 150 [2022-11-16 12:47:51,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 135 transitions, 311 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:47:51,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 150 [2022-11-16 12:47:51,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:47:51,699 INFO L130 PetriNetUnfolder]: 37/365 cut-off events. [2022-11-16 12:47:51,700 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-16 12:47:51,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 365 events. 37/365 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1371 event pairs, 6 based on Foata normal form. 7/347 useless extension candidates. Maximal degree in co-relation 280. Up to 32 conditions per place. [2022-11-16 12:47:51,702 INFO L137 encePairwiseOnDemand]: 146/150 looper letters, 16 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2022-11-16 12:47:51,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 135 transitions, 350 flow [2022-11-16 12:47:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:47:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2022-11-16 12:47:51,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8866666666666667 [2022-11-16 12:47:51,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2022-11-16 12:47:51,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2022-11-16 12:47:51,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:47:51,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2022-11-16 12:47:51,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,708 INFO L175 Difference]: Start difference. First operand has 134 places, 135 transitions, 311 flow. Second operand 3 states and 399 transitions. [2022-11-16 12:47:51,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 135 transitions, 350 flow [2022-11-16 12:47:51,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 135 transitions, 343 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-16 12:47:51,716 INFO L231 Difference]: Finished difference. Result has 135 places, 133 transitions, 302 flow [2022-11-16 12:47:51,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=135, PETRI_TRANSITIONS=133} [2022-11-16 12:47:51,718 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2022-11-16 12:47:51,718 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 133 transitions, 302 flow [2022-11-16 12:47:51,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:51,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:51,719 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:51,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:47:51,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:47:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:51,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1397880998, now seen corresponding path program 1 times [2022-11-16 12:47:51,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:51,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806307684] [2022-11-16 12:47:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:52,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806307684] [2022-11-16 12:47:52,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806307684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:52,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:52,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:47:52,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522573384] [2022-11-16 12:47:52,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:52,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:47:52,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:47:52,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:47:52,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 150 [2022-11-16 12:47:52,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 133 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:52,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:47:52,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 150 [2022-11-16 12:47:52,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:47:52,291 INFO L130 PetriNetUnfolder]: 32/374 cut-off events. [2022-11-16 12:47:52,291 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-16 12:47:52,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 374 events. 32/374 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1335 event pairs, 6 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 226. Up to 43 conditions per place. [2022-11-16 12:47:52,294 INFO L137 encePairwiseOnDemand]: 144/150 looper letters, 20 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2022-11-16 12:47:52,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 138 transitions, 371 flow [2022-11-16 12:47:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:47:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:47:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 768 transitions. [2022-11-16 12:47:52,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8533333333333334 [2022-11-16 12:47:52,297 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 768 transitions. [2022-11-16 12:47:52,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 768 transitions. [2022-11-16 12:47:52,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:47:52,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 768 transitions. [2022-11-16 12:47:52,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:52,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:52,303 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:52,303 INFO L175 Difference]: Start difference. First operand has 135 places, 133 transitions, 302 flow. Second operand 6 states and 768 transitions. [2022-11-16 12:47:52,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 138 transitions, 371 flow [2022-11-16 12:47:52,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:47:52,307 INFO L231 Difference]: Finished difference. Result has 140 places, 134 transitions, 319 flow [2022-11-16 12:47:52,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=140, PETRI_TRANSITIONS=134} [2022-11-16 12:47:52,308 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 5 predicate places. [2022-11-16 12:47:52,308 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 134 transitions, 319 flow [2022-11-16 12:47:52,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:52,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:52,309 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] [2022-11-16 12:47:52,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:47:52,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:47:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash 794893440, now seen corresponding path program 1 times [2022-11-16 12:47:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102466059] [2022-11-16 12:47:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:52,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:52,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941754605] [2022-11-16 12:47:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:52,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:52,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:52,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:47:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:52,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:47:52,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:53,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:53,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102466059] [2022-11-16 12:47:53,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941754605] [2022-11-16 12:47:53,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941754605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:53,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:53,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:47:53,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506434121] [2022-11-16 12:47:53,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:53,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:47:53,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:47:53,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:47:53,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 150 [2022-11-16 12:47:53,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 134 transitions, 319 flow. Second operand has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:53,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:47:53,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 150 [2022-11-16 12:47:53,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:47:53,471 INFO L130 PetriNetUnfolder]: 45/469 cut-off events. [2022-11-16 12:47:53,471 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-11-16 12:47:53,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 469 events. 45/469 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1911 event pairs, 10 based on Foata normal form. 3/441 useless extension candidates. Maximal degree in co-relation 260. Up to 49 conditions per place. [2022-11-16 12:47:53,475 INFO L137 encePairwiseOnDemand]: 141/150 looper letters, 32 selfloop transitions, 8 changer transitions 0/149 dead transitions. [2022-11-16 12:47:53,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 149 transitions, 454 flow [2022-11-16 12:47:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:47:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:47:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 998 transitions. [2022-11-16 12:47:53,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8316666666666667 [2022-11-16 12:47:53,478 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 998 transitions. [2022-11-16 12:47:53,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 998 transitions. [2022-11-16 12:47:53,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:47:53,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 998 transitions. [2022-11-16 12:47:53,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 124.75) internal successors, (998), 8 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:53,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:53,485 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:53,485 INFO L175 Difference]: Start difference. First operand has 140 places, 134 transitions, 319 flow. Second operand 8 states and 998 transitions. [2022-11-16 12:47:53,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 149 transitions, 454 flow [2022-11-16 12:47:53,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 149 transitions, 446 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:47:53,489 INFO L231 Difference]: Finished difference. Result has 144 places, 136 transitions, 347 flow [2022-11-16 12:47:53,489 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=347, PETRI_PLACES=144, PETRI_TRANSITIONS=136} [2022-11-16 12:47:53,490 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 9 predicate places. [2022-11-16 12:47:53,490 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 136 transitions, 347 flow [2022-11-16 12:47:53,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:53,491 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:53,491 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] [2022-11-16 12:47:53,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:53,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:53,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:47:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:53,699 INFO L85 PathProgramCache]: Analyzing trace with hash 791710752, now seen corresponding path program 1 times [2022-11-16 12:47:53,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:53,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609178921] [2022-11-16 12:47:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:53,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:53,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:53,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394009423] [2022-11-16 12:47:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:53,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:53,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:53,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:53,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:47:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:47:54,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:54,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:47:54,156 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:47:54,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:47:54,208 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:47:54,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:47:54,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:47:54,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:47:54,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 12:47:55,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-16 12:47:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:55,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:55,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:55,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609178921] [2022-11-16 12:47:55,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:55,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394009423] [2022-11-16 12:47:55,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394009423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:55,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:55,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-16 12:47:55,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727853231] [2022-11-16 12:47:55,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:55,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:47:55,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:47:55,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:47:55,551 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-16 12:47:55,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 136 transitions, 347 flow. Second operand has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:55,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:47:55,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-16 12:47:55,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:47:56,701 INFO L130 PetriNetUnfolder]: 1824/4593 cut-off events. [2022-11-16 12:47:56,701 INFO L131 PetriNetUnfolder]: For 630/630 co-relation queries the response was YES. [2022-11-16 12:47:56,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8258 conditions, 4593 events. 1824/4593 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 33394 event pairs, 322 based on Foata normal form. 0/4074 useless extension candidates. Maximal degree in co-relation 4179. Up to 1710 conditions per place. [2022-11-16 12:47:56,730 INFO L137 encePairwiseOnDemand]: 124/150 looper letters, 153 selfloop transitions, 64 changer transitions 20/316 dead transitions. [2022-11-16 12:47:56,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 316 transitions, 1219 flow [2022-11-16 12:47:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:47:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-16 12:47:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2147 transitions. [2022-11-16 12:47:56,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6223188405797101 [2022-11-16 12:47:56,736 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2147 transitions. [2022-11-16 12:47:56,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2147 transitions. [2022-11-16 12:47:56,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:47:56,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2147 transitions. [2022-11-16 12:47:56,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.34782608695652) internal successors, (2147), 23 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:56,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:56,749 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:56,749 INFO L175 Difference]: Start difference. First operand has 144 places, 136 transitions, 347 flow. Second operand 23 states and 2147 transitions. [2022-11-16 12:47:56,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 316 transitions, 1219 flow [2022-11-16 12:47:56,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 316 transitions, 1204 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-16 12:47:56,758 INFO L231 Difference]: Finished difference. Result has 175 places, 200 transitions, 764 flow [2022-11-16 12:47:56,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=764, PETRI_PLACES=175, PETRI_TRANSITIONS=200} [2022-11-16 12:47:56,759 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 40 predicate places. [2022-11-16 12:47:56,759 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 200 transitions, 764 flow [2022-11-16 12:47:56,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:56,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:56,760 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] [2022-11-16 12:47:56,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:56,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:56,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:47:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1295349294, now seen corresponding path program 2 times [2022-11-16 12:47:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:56,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275010799] [2022-11-16 12:47:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:57,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:47:57,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825648795] [2022-11-16 12:47:57,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:47:57,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:57,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:57,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:57,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:47:57,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:47:57,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:47:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:47:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:57,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:47:57,296 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:47:57,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:47:57,342 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:47:57,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:47:57,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:47:57,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:47:57,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 12:47:58,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-16 12:47:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:58,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:58,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:58,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275010799] [2022-11-16 12:47:58,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:47:58,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825648795] [2022-11-16 12:47:58,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825648795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:58,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:58,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-16 12:47:58,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569054554] [2022-11-16 12:47:58,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:58,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:47:58,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:58,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:47:58,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:47:58,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-16 12:47:58,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 200 transitions, 764 flow. Second operand has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:58,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:47:58,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-16 12:47:58,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:00,550 INFO L130 PetriNetUnfolder]: 3189/8483 cut-off events. [2022-11-16 12:48:00,550 INFO L131 PetriNetUnfolder]: For 17952/18073 co-relation queries the response was YES. [2022-11-16 12:48:00,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25031 conditions, 8483 events. 3189/8483 cut-off events. For 17952/18073 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 70425 event pairs, 1146 based on Foata normal form. 14/7952 useless extension candidates. Maximal degree in co-relation 20975. Up to 2085 conditions per place. [2022-11-16 12:48:00,640 INFO L137 encePairwiseOnDemand]: 124/150 looper letters, 247 selfloop transitions, 69 changer transitions 0/395 dead transitions. [2022-11-16 12:48:00,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 395 transitions, 2329 flow [2022-11-16 12:48:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:48:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-16 12:48:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1524 transitions. [2022-11-16 12:48:00,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.635 [2022-11-16 12:48:00,645 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1524 transitions. [2022-11-16 12:48:00,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1524 transitions. [2022-11-16 12:48:00,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:00,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1524 transitions. [2022-11-16 12:48:00,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 95.25) internal successors, (1524), 16 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:00,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 150.0) internal successors, (2550), 17 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:00,655 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 150.0) internal successors, (2550), 17 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:00,655 INFO L175 Difference]: Start difference. First operand has 175 places, 200 transitions, 764 flow. Second operand 16 states and 1524 transitions. [2022-11-16 12:48:00,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 395 transitions, 2329 flow [2022-11-16 12:48:00,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 395 transitions, 2321 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:48:00,755 INFO L231 Difference]: Finished difference. Result has 196 places, 253 transitions, 1397 flow [2022-11-16 12:48:00,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1397, PETRI_PLACES=196, PETRI_TRANSITIONS=253} [2022-11-16 12:48:00,756 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 61 predicate places. [2022-11-16 12:48:00,757 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 253 transitions, 1397 flow [2022-11-16 12:48:00,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:00,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:00,758 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] [2022-11-16 12:48:00,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:00,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:00,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:48:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash 167897142, now seen corresponding path program 3 times [2022-11-16 12:48:00,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:00,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521023543] [2022-11-16 12:48:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:00,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:00,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:00,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995118761] [2022-11-16 12:48:00,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:48:00,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:00,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:01,006 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:01,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:48:01,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:48:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:48:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:01,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:48:01,280 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:48:01,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:48:01,325 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:48:01,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:48:01,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:01,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:01,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 12:48:02,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-16 12:48:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:02,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:02,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521023543] [2022-11-16 12:48:02,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995118761] [2022-11-16 12:48:02,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995118761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:02,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:02,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-16 12:48:02,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64006545] [2022-11-16 12:48:02,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:02,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:48:02,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:48:02,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:48:02,473 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-16 12:48:02,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 253 transitions, 1397 flow. Second operand has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:02,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:02,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-16 12:48:02,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:05,287 INFO L130 PetriNetUnfolder]: 4220/11178 cut-off events. [2022-11-16 12:48:05,287 INFO L131 PetriNetUnfolder]: For 67512/67866 co-relation queries the response was YES. [2022-11-16 12:48:05,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43667 conditions, 11178 events. 4220/11178 cut-off events. For 67512/67866 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 99334 event pairs, 845 based on Foata normal form. 53/10568 useless extension candidates. Maximal degree in co-relation 37901. Up to 2583 conditions per place. [2022-11-16 12:48:05,406 INFO L137 encePairwiseOnDemand]: 128/150 looper letters, 279 selfloop transitions, 106 changer transitions 5/469 dead transitions. [2022-11-16 12:48:05,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 469 transitions, 3881 flow [2022-11-16 12:48:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:48:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-16 12:48:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1898 transitions. [2022-11-16 12:48:05,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6326666666666667 [2022-11-16 12:48:05,413 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1898 transitions. [2022-11-16 12:48:05,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1898 transitions. [2022-11-16 12:48:05,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:05,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1898 transitions. [2022-11-16 12:48:05,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.9) internal successors, (1898), 20 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:05,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:05,426 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:05,426 INFO L175 Difference]: Start difference. First operand has 196 places, 253 transitions, 1397 flow. Second operand 20 states and 1898 transitions. [2022-11-16 12:48:05,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 469 transitions, 3881 flow [2022-11-16 12:48:05,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 469 transitions, 3790 flow, removed 42 selfloop flow, removed 4 redundant places. [2022-11-16 12:48:05,499 INFO L231 Difference]: Finished difference. Result has 223 places, 308 transitions, 2191 flow [2022-11-16 12:48:05,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2191, PETRI_PLACES=223, PETRI_TRANSITIONS=308} [2022-11-16 12:48:05,501 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 88 predicate places. [2022-11-16 12:48:05,501 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 308 transitions, 2191 flow [2022-11-16 12:48:05,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:05,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:05,502 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] [2022-11-16 12:48:05,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:05,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:48:05,708 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:48:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash 594756190, now seen corresponding path program 4 times [2022-11-16 12:48:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:05,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734371376] [2022-11-16 12:48:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:05,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:05,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092096084] [2022-11-16 12:48:05,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:48:05,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:05,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:05,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:05,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:48:06,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:48:06,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 12:48:06,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:06,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:48:06,172 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:48:06,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:48:06,197 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:48:06,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-16 12:48:06,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:06,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:06,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 12:48:07,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-16 12:48:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:07,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:07,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:07,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734371376] [2022-11-16 12:48:07,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:07,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092096084] [2022-11-16 12:48:07,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092096084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:07,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:07,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-16 12:48:07,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922268707] [2022-11-16 12:48:07,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:07,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:48:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:07,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:48:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:48:07,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-16 12:48:07,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 308 transitions, 2191 flow. Second operand has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:07,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:07,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-16 12:48:07,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:10,557 INFO L130 PetriNetUnfolder]: 5142/13679 cut-off events. [2022-11-16 12:48:10,557 INFO L131 PetriNetUnfolder]: For 129730/130224 co-relation queries the response was YES. [2022-11-16 12:48:10,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61974 conditions, 13679 events. 5142/13679 cut-off events. For 129730/130224 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 129742 event pairs, 1508 based on Foata normal form. 12/12868 useless extension candidates. Maximal degree in co-relation 54302. Up to 6110 conditions per place. [2022-11-16 12:48:10,700 INFO L137 encePairwiseOnDemand]: 128/150 looper letters, 322 selfloop transitions, 71 changer transitions 8/480 dead transitions. [2022-11-16 12:48:10,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 480 transitions, 4748 flow [2022-11-16 12:48:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:48:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 12:48:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1771 transitions. [2022-11-16 12:48:10,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6214035087719298 [2022-11-16 12:48:10,706 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1771 transitions. [2022-11-16 12:48:10,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1771 transitions. [2022-11-16 12:48:10,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:10,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1771 transitions. [2022-11-16 12:48:10,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.21052631578948) internal successors, (1771), 19 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:10,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:10,718 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:10,719 INFO L175 Difference]: Start difference. First operand has 223 places, 308 transitions, 2191 flow. Second operand 19 states and 1771 transitions. [2022-11-16 12:48:10,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 480 transitions, 4748 flow [2022-11-16 12:48:10,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 480 transitions, 4638 flow, removed 47 selfloop flow, removed 4 redundant places. [2022-11-16 12:48:10,962 INFO L231 Difference]: Finished difference. Result has 246 places, 356 transitions, 2977 flow [2022-11-16 12:48:10,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2977, PETRI_PLACES=246, PETRI_TRANSITIONS=356} [2022-11-16 12:48:10,964 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 111 predicate places. [2022-11-16 12:48:10,964 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 356 transitions, 2977 flow [2022-11-16 12:48:10,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:10,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:10,965 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] [2022-11-16 12:48:10,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:11,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:11,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:48:11,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:11,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1468702446, now seen corresponding path program 5 times [2022-11-16 12:48:11,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:11,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209477484] [2022-11-16 12:48:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:11,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:11,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594418256] [2022-11-16 12:48:11,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:48:11,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:11,210 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:11,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:48:11,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:48:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:11,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:48:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:11,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:48:11,474 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:48:11,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:48:11,509 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:48:11,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:48:11,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:11,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:11,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 12:48:12,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-16 12:48:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:12,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:12,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209477484] [2022-11-16 12:48:12,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594418256] [2022-11-16 12:48:12,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594418256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:12,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:12,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-16 12:48:12,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376488497] [2022-11-16 12:48:12,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:12,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:48:12,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:48:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:48:12,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-16 12:48:12,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 356 transitions, 2977 flow. Second operand has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:12,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:12,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-16 12:48:12,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:17,756 INFO L130 PetriNetUnfolder]: 7669/20609 cut-off events. [2022-11-16 12:48:17,756 INFO L131 PetriNetUnfolder]: For 236821/237489 co-relation queries the response was YES. [2022-11-16 12:48:17,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99508 conditions, 20609 events. 7669/20609 cut-off events. For 236821/237489 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 206997 event pairs, 2689 based on Foata normal form. 31/19462 useless extension candidates. Maximal degree in co-relation 90618. Up to 7719 conditions per place. [2022-11-16 12:48:18,165 INFO L137 encePairwiseOnDemand]: 127/150 looper letters, 407 selfloop transitions, 103 changer transitions 1/590 dead transitions. [2022-11-16 12:48:18,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 590 transitions, 6496 flow [2022-11-16 12:48:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:48:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 12:48:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1795 transitions. [2022-11-16 12:48:18,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6298245614035087 [2022-11-16 12:48:18,171 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1795 transitions. [2022-11-16 12:48:18,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1795 transitions. [2022-11-16 12:48:18,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:18,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1795 transitions. [2022-11-16 12:48:18,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 94.47368421052632) internal successors, (1795), 19 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:18,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:18,183 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:18,184 INFO L175 Difference]: Start difference. First operand has 246 places, 356 transitions, 2977 flow. Second operand 19 states and 1795 transitions. [2022-11-16 12:48:18,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 590 transitions, 6496 flow [2022-11-16 12:48:18,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 590 transitions, 6367 flow, removed 54 selfloop flow, removed 5 redundant places. [2022-11-16 12:48:18,506 INFO L231 Difference]: Finished difference. Result has 271 places, 431 transitions, 4390 flow [2022-11-16 12:48:18,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4390, PETRI_PLACES=271, PETRI_TRANSITIONS=431} [2022-11-16 12:48:18,507 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 136 predicate places. [2022-11-16 12:48:18,507 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 431 transitions, 4390 flow [2022-11-16 12:48:18,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:18,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:18,508 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] [2022-11-16 12:48:18,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:18,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:48:18,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:48:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1408508846, now seen corresponding path program 6 times [2022-11-16 12:48:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268759677] [2022-11-16 12:48:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:18,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:18,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:18,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110167084] [2022-11-16 12:48:18,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:48:18,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:18,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:18,745 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:18,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:48:18,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 12:48:18,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:48:18,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:18,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:48:19,001 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:48:19,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:48:19,038 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:48:19,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:48:19,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:19,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:19,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 12:48:19,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2022-11-16 12:48:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:19,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:19,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:19,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268759677] [2022-11-16 12:48:19,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:19,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110167084] [2022-11-16 12:48:19,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110167084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:19,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:19,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:48:19,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51273251] [2022-11-16 12:48:19,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:19,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:48:19,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:48:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:48:19,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-16 12:48:19,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 431 transitions, 4390 flow. Second operand has 16 states, 16 states have (on average 85.75) internal successors, (1372), 16 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:19,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:19,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-16 12:48:19,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:27,300 INFO L130 PetriNetUnfolder]: 10280/27185 cut-off events. [2022-11-16 12:48:27,300 INFO L131 PetriNetUnfolder]: For 471036/472093 co-relation queries the response was YES. [2022-11-16 12:48:27,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151852 conditions, 27185 events. 10280/27185 cut-off events. For 471036/472093 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 287274 event pairs, 3983 based on Foata normal form. 41/25608 useless extension candidates. Maximal degree in co-relation 147451. Up to 11371 conditions per place. [2022-11-16 12:48:27,632 INFO L137 encePairwiseOnDemand]: 127/150 looper letters, 488 selfloop transitions, 113 changer transitions 4/684 dead transitions. [2022-11-16 12:48:27,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 684 transitions, 9036 flow [2022-11-16 12:48:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:48:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:48:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2239 transitions. [2022-11-16 12:48:27,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6219444444444444 [2022-11-16 12:48:27,637 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2239 transitions. [2022-11-16 12:48:27,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2239 transitions. [2022-11-16 12:48:27,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:27,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2239 transitions. [2022-11-16 12:48:27,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 93.29166666666667) internal successors, (2239), 24 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 150.0) internal successors, (3750), 25 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,650 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 150.0) internal successors, (3750), 25 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,650 INFO L175 Difference]: Start difference. First operand has 271 places, 431 transitions, 4390 flow. Second operand 24 states and 2239 transitions. [2022-11-16 12:48:27,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 684 transitions, 9036 flow [2022-11-16 12:48:28,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 684 transitions, 8669 flow, removed 180 selfloop flow, removed 4 redundant places. [2022-11-16 12:48:28,523 INFO L231 Difference]: Finished difference. Result has 307 places, 508 transitions, 5869 flow [2022-11-16 12:48:28,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5869, PETRI_PLACES=307, PETRI_TRANSITIONS=508} [2022-11-16 12:48:28,524 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 172 predicate places. [2022-11-16 12:48:28,524 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 508 transitions, 5869 flow [2022-11-16 12:48:28,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.75) internal successors, (1372), 16 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:28,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:28,526 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] [2022-11-16 12:48:28,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:28,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:48:28,732 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:48:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:28,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1253082283, now seen corresponding path program 1 times [2022-11-16 12:48:28,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:28,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985304308] [2022-11-16 12:48:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:28,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:28,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:28,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156119556] [2022-11-16 12:48:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:28,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:28,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:28,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:28,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:48:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:28,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:48:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:29,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:48:29,078 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:48:29,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:48:29,122 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:48:29,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:48:29,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:29,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:29,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 12:48:29,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-16 12:48:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:30,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:30,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985304308] [2022-11-16 12:48:30,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156119556] [2022-11-16 12:48:30,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156119556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:30,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:30,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-16 12:48:30,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439556125] [2022-11-16 12:48:30,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:30,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:48:30,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:48:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:48:30,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-16 12:48:30,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 508 transitions, 5869 flow. Second operand has 17 states, 17 states have (on average 85.6470588235294) internal successors, (1456), 17 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:30,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:30,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-16 12:48:30,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:40,081 INFO L130 PetriNetUnfolder]: 12501/33331 cut-off events. [2022-11-16 12:48:40,081 INFO L131 PetriNetUnfolder]: For 706264/707673 co-relation queries the response was YES. [2022-11-16 12:48:40,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197925 conditions, 33331 events. 12501/33331 cut-off events. For 706264/707673 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 361605 event pairs, 4732 based on Foata normal form. 46/31413 useless extension candidates. Maximal degree in co-relation 193512. Up to 15599 conditions per place. [2022-11-16 12:48:40,589 INFO L137 encePairwiseOnDemand]: 126/150 looper letters, 612 selfloop transitions, 164 changer transitions 4/859 dead transitions. [2022-11-16 12:48:40,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 859 transitions, 11839 flow [2022-11-16 12:48:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:48:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 12:48:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1820 transitions. [2022-11-16 12:48:40,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6385964912280702 [2022-11-16 12:48:40,593 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1820 transitions. [2022-11-16 12:48:40,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1820 transitions. [2022-11-16 12:48:40,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:40,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1820 transitions. [2022-11-16 12:48:40,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 95.78947368421052) internal successors, (1820), 19 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:40,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:40,603 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:40,603 INFO L175 Difference]: Start difference. First operand has 307 places, 508 transitions, 5869 flow. Second operand 19 states and 1820 transitions. [2022-11-16 12:48:40,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 859 transitions, 11839 flow [2022-11-16 12:48:41,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 859 transitions, 11436 flow, removed 198 selfloop flow, removed 4 redundant places. [2022-11-16 12:48:41,628 INFO L231 Difference]: Finished difference. Result has 334 places, 628 transitions, 8148 flow [2022-11-16 12:48:41,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=5470, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8148, PETRI_PLACES=334, PETRI_TRANSITIONS=628} [2022-11-16 12:48:41,630 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 199 predicate places. [2022-11-16 12:48:41,630 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 628 transitions, 8148 flow [2022-11-16 12:48:41,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.6470588235294) internal successors, (1456), 17 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:41,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:41,631 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] [2022-11-16 12:48:41,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:41,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:48:41,837 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:48:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:41,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1727769949, now seen corresponding path program 2 times [2022-11-16 12:48:41,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:41,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778672144] [2022-11-16 12:48:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:41,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:41,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:48:41,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671031240] [2022-11-16 12:48:41,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:48:41,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:41,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:41,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:48:42,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:48:42,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:42,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:48:42,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:42,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:48:42,144 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:48:42,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:48:42,180 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:48:42,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:48:42,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:42,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:48:42,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 12:48:42,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-16 12:48:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:43,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:43,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778672144] [2022-11-16 12:48:43,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:48:43,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671031240] [2022-11-16 12:48:43,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671031240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:43,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:43,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-16 12:48:43,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797251672] [2022-11-16 12:48:43,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:43,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:48:43,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:43,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:48:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:48:43,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-16 12:48:43,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 628 transitions, 8148 flow. Second operand has 17 states, 17 states have (on average 85.6470588235294) internal successors, (1456), 17 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:43,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:43,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-16 12:48:43,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:56,063 INFO L130 PetriNetUnfolder]: 14526/38534 cut-off events. [2022-11-16 12:48:56,063 INFO L131 PetriNetUnfolder]: For 1251159/1252977 co-relation queries the response was YES. [2022-11-16 12:48:56,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259512 conditions, 38534 events. 14526/38534 cut-off events. For 1251159/1252977 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 430342 event pairs, 5006 based on Foata normal form. 119/36425 useless extension candidates. Maximal degree in co-relation 254786. Up to 18735 conditions per place. [2022-11-16 12:48:56,837 INFO L137 encePairwiseOnDemand]: 126/150 looper letters, 592 selfloop transitions, 224 changer transitions 8/903 dead transitions. [2022-11-16 12:48:56,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 903 transitions, 14167 flow [2022-11-16 12:48:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:48:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 12:48:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1591 transitions. [2022-11-16 12:48:56,841 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.623921568627451 [2022-11-16 12:48:56,841 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1591 transitions. [2022-11-16 12:48:56,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1591 transitions. [2022-11-16 12:48:56,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:56,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1591 transitions. [2022-11-16 12:48:56,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 93.58823529411765) internal successors, (1591), 17 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,849 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:56,849 INFO L175 Difference]: Start difference. First operand has 334 places, 628 transitions, 8148 flow. Second operand 17 states and 1591 transitions. [2022-11-16 12:48:56,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 903 transitions, 14167 flow [2022-11-16 12:48:59,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 903 transitions, 13576 flow, removed 292 selfloop flow, removed 4 redundant places. [2022-11-16 12:49:00,008 INFO L231 Difference]: Finished difference. Result has 357 places, 764 transitions, 11091 flow [2022-11-16 12:49:00,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=7849, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11091, PETRI_PLACES=357, PETRI_TRANSITIONS=764} [2022-11-16 12:49:00,009 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 222 predicate places. [2022-11-16 12:49:00,009 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 764 transitions, 11091 flow [2022-11-16 12:49:00,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.6470588235294) internal successors, (1456), 17 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:00,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:00,010 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] [2022-11-16 12:49:00,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:00,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:49:00,210 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-16 12:49:00,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:00,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1013742977, now seen corresponding path program 3 times [2022-11-16 12:49:00,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:00,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331368377] [2022-11-16 12:49:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:00,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:00,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:49:00,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109208850] [2022-11-16 12:49:00,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:49:00,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:00,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:00,231 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:00,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90102d19-ffe8-4e69-afff-7db159c9fc28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:49:00,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:49:00,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:49:00,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:49:00,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:00,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:49:00,503 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:49:00,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:49:00,540 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:49:00,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:49:00,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:49:00,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 12:49:00,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 12:49:01,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-16 12:49:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:01,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:49:01,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:01,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331368377] [2022-11-16 12:49:01,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:49:01,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109208850] [2022-11-16 12:49:01,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109208850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:01,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:01,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-16 12:49:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574409167] [2022-11-16 12:49:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:01,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:49:01,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:49:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:49:01,498 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-16 12:49:01,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 764 transitions, 11091 flow. Second operand has 17 states, 17 states have (on average 85.6470588235294) internal successors, (1456), 17 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:01,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:01,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-16 12:49:01,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand