./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-8393723 [2022-11-18 18:29:26,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:29:26,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:29:26,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:29:26,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:29:26,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:29:26,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:29:26,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:29:26,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:29:26,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:29:26,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:29:26,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:29:26,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:29:26,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:29:26,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:29:26,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:29:26,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:29:26,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:29:26,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:29:26,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:29:26,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:29:26,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:29:26,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:29:26,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:29:26,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:29:26,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:29:26,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:29:26,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:29:26,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:29:26,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:29:26,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:29:26,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:29:26,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:29:26,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:29:26,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:29:26,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:29:26,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:29:26,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:29:26,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:29:26,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:29:26,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:29:26,082 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:29:26,125 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:29:26,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:29:26,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:29:26,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:29:26,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:29:26,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:29:26,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:29:26,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:29:26,128 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:29:26,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:29:26,128 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:29:26,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:29:26,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:29:26,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:29:26,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:29:26,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:29:26,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:29:26,129 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:29:26,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:29:26,130 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:29:26,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:29:26,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:29:26,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:29:26,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:29:26,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:29:26,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:29:26,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:29:26,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:29:26,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:29:26,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:29:26,137 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:29:26,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:29:26,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:29:26,137 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_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2022-11-18 18:29:26,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:29:26,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:29:26,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:29:26,527 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:29:26,530 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:29:26,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-11-18 18:29:26,624 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/data/e083c9069/e84b3ff61da1474ca9c81810322bdd5e/FLAGb89915f54 [2022-11-18 18:29:27,249 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:29:27,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-11-18 18:29:27,271 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/data/e083c9069/e84b3ff61da1474ca9c81810322bdd5e/FLAGb89915f54 [2022-11-18 18:29:27,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/data/e083c9069/e84b3ff61da1474ca9c81810322bdd5e [2022-11-18 18:29:27,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:29:27,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:29:27,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:29:27,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:29:27,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:29:27,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:29:27" (1/1) ... [2022-11-18 18:29:27,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72442b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:27, skipping insertion in model container [2022-11-18 18:29:27,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:29:27" (1/1) ... [2022-11-18 18:29:27,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:29:27,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:29:27,975 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-11-18 18:29:27,992 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-11-18 18:29:28,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:29:28,024 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:29:28,097 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-11-18 18:29:28,105 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-11-18 18:29:28,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:29:28,155 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:29:28,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28 WrapperNode [2022-11-18 18:29:28,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:29:28,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:29:28,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:29:28,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:29:28,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,249 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2022-11-18 18:29:28,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:29:28,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:29:28,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:29:28,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:29:28,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,303 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:29:28,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:29:28,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:29:28,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:29:28,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (1/1) ... [2022-11-18 18:29:28,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:29:28,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:28,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:29:28,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:29:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:29:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 18:29:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 18:29:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 18:29:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 18:29:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:29:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 18:29:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:29:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:29:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:29:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-18 18:29:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:29:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:29:28,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:29:28,399 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:29:28,555 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:29:28,558 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:29:28,947 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:29:28,955 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:29:28,956 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:29:28,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:29:28 BoogieIcfgContainer [2022-11-18 18:29:28,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:29:28,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:29:28,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:29:28,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:29:28,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:29:27" (1/3) ... [2022-11-18 18:29:28,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1285b643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:29:28, skipping insertion in model container [2022-11-18 18:29:28,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:28" (2/3) ... [2022-11-18 18:29:28,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1285b643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:29:28, skipping insertion in model container [2022-11-18 18:29:28,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:29:28" (3/3) ... [2022-11-18 18:29:28,971 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2022-11-18 18:29:28,985 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:29:28,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:29:28,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:29:28,997 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:29:29,147 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:29:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 150 transitions, 316 flow [2022-11-18 18:29:29,310 INFO L130 PetriNetUnfolder]: 10/148 cut-off events. [2022-11-18 18:29:29,311 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:29:29,318 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. [2022-11-18 18:29:29,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 150 transitions, 316 flow [2022-11-18 18:29:29,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 138 transitions, 285 flow [2022-11-18 18:29:29,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:29:29,364 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;@530fa19d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:29:29,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 18:29:29,407 INFO L130 PetriNetUnfolder]: 5/109 cut-off events. [2022-11-18 18:29:29,407 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 18:29:29,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:29,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:29,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1292919319, now seen corresponding path program 1 times [2022-11-18 18:29:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:29,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166955170] [2022-11-18 18:29:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:29,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:29:29,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301679153] [2022-11-18 18:29:29,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:29,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:29,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:29,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:29,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:29:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:29,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:29:29,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:30,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166955170] [2022-11-18 18:29:30,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:29:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301679153] [2022-11-18 18:29:30,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301679153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:30,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:30,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:29:30,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268753877] [2022-11-18 18:29:30,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:30,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:29:30,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:29:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:29:30,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 150 [2022-11-18 18:29:30,226 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) [2022-11-18 18:29:30,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:30,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 150 [2022-11-18 18:29:30,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:29:30,374 INFO L130 PetriNetUnfolder]: 34/287 cut-off events. [2022-11-18 18:29:30,375 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 18:29:30,377 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. [2022-11-18 18:29:30,380 INFO L137 encePairwiseOnDemand]: 140/150 looper letters, 15 selfloop transitions, 7 changer transitions 0/137 dead transitions. [2022-11-18 18:29:30,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 137 transitions, 333 flow [2022-11-18 18:29:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:29:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 18:29:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 539 transitions. [2022-11-18 18:29:30,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8983333333333333 [2022-11-18 18:29:30,397 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 539 transitions. [2022-11-18 18:29:30,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 539 transitions. [2022-11-18 18:29:30,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:29:30,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 539 transitions. [2022-11-18 18:29:30,407 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) [2022-11-18 18:29:30,413 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) [2022-11-18 18:29:30,414 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) [2022-11-18 18:29:30,416 INFO L175 Difference]: Start difference. First operand has 135 places, 138 transitions, 285 flow. Second operand 4 states and 539 transitions. [2022-11-18 18:29:30,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 137 transitions, 333 flow [2022-11-18 18:29:30,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 137 transitions, 326 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:29:30,424 INFO L231 Difference]: Finished difference. Result has 132 places, 134 transitions, 299 flow [2022-11-18 18:29:30,426 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} [2022-11-18 18:29:30,430 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -3 predicate places. [2022-11-18 18:29:30,430 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 134 transitions, 299 flow [2022-11-18 18:29:30,431 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) [2022-11-18 18:29:30,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:30,431 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] [2022-11-18 18:29:30,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:30,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:30,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:30,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:30,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1782579319, now seen corresponding path program 1 times [2022-11-18 18:29:30,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:30,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390624426] [2022-11-18 18:29:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:30,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:31,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:31,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390624426] [2022-11-18 18:29:31,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390624426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:31,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:31,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:29:31,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485015593] [2022-11-18 18:29:31,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:31,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:29:31,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:29:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:29:31,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 150 [2022-11-18 18:29:31,186 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) [2022-11-18 18:29:31,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:31,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 150 [2022-11-18 18:29:31,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:29:31,308 INFO L130 PetriNetUnfolder]: 47/421 cut-off events. [2022-11-18 18:29:31,309 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-18 18:29:31,315 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. [2022-11-18 18:29:31,317 INFO L137 encePairwiseOnDemand]: 146/150 looper letters, 12 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2022-11-18 18:29:31,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 139 transitions, 349 flow [2022-11-18 18:29:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:29:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:29:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2022-11-18 18:29:31,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9244444444444444 [2022-11-18 18:29:31,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2022-11-18 18:29:31,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2022-11-18 18:29:31,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:29:31,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2022-11-18 18:29:31,328 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) [2022-11-18 18:29:31,331 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) [2022-11-18 18:29:31,339 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) [2022-11-18 18:29:31,339 INFO L175 Difference]: Start difference. First operand has 132 places, 134 transitions, 299 flow. Second operand 3 states and 416 transitions. [2022-11-18 18:29:31,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 139 transitions, 349 flow [2022-11-18 18:29:31,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 139 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:29:31,344 INFO L231 Difference]: Finished difference. Result has 134 places, 135 transitions, 311 flow [2022-11-18 18:29:31,344 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} [2022-11-18 18:29:31,345 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -1 predicate places. [2022-11-18 18:29:31,345 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 135 transitions, 311 flow [2022-11-18 18:29:31,346 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) [2022-11-18 18:29:31,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:31,346 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] [2022-11-18 18:29:31,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:29:31,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:31,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1817279563, now seen corresponding path program 1 times [2022-11-18 18:29:31,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:31,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899875331] [2022-11-18 18:29:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:31,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:31,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:31,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899875331] [2022-11-18 18:29:31,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899875331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:31,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:31,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:29:31,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709176197] [2022-11-18 18:29:31,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:31,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:29:31,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:31,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:29:31,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:29:31,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 150 [2022-11-18 18:29:31,619 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) [2022-11-18 18:29:31,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:31,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 150 [2022-11-18 18:29:31,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:29:31,743 INFO L130 PetriNetUnfolder]: 37/365 cut-off events. [2022-11-18 18:29:31,743 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-18 18:29:31,745 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. [2022-11-18 18:29:31,747 INFO L137 encePairwiseOnDemand]: 146/150 looper letters, 16 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2022-11-18 18:29:31,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 135 transitions, 350 flow [2022-11-18 18:29:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:29:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:29:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2022-11-18 18:29:31,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8866666666666667 [2022-11-18 18:29:31,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2022-11-18 18:29:31,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2022-11-18 18:29:31,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:29:31,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2022-11-18 18:29:31,751 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) [2022-11-18 18:29:31,752 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) [2022-11-18 18:29:31,753 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) [2022-11-18 18:29:31,753 INFO L175 Difference]: Start difference. First operand has 134 places, 135 transitions, 311 flow. Second operand 3 states and 399 transitions. [2022-11-18 18:29:31,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 135 transitions, 350 flow [2022-11-18 18:29:31,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 135 transitions, 343 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 18:29:31,760 INFO L231 Difference]: Finished difference. Result has 135 places, 133 transitions, 302 flow [2022-11-18 18:29:31,761 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} [2022-11-18 18:29:31,763 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2022-11-18 18:29:31,765 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 133 transitions, 302 flow [2022-11-18 18:29:31,766 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) [2022-11-18 18:29:31,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:31,766 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] [2022-11-18 18:29:31,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:29:31,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:31,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1397880998, now seen corresponding path program 1 times [2022-11-18 18:29:31,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852434424] [2022-11-18 18:29:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:32,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:32,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852434424] [2022-11-18 18:29:32,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852434424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:32,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:32,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:29:32,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140820058] [2022-11-18 18:29:32,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:32,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:29:32,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:32,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:29:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:29:32,298 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 150 [2022-11-18 18:29:32,299 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) [2022-11-18 18:29:32,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:32,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 150 [2022-11-18 18:29:32,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:29:32,458 INFO L130 PetriNetUnfolder]: 32/374 cut-off events. [2022-11-18 18:29:32,458 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-18 18:29:32,459 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. [2022-11-18 18:29:32,461 INFO L137 encePairwiseOnDemand]: 144/150 looper letters, 20 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2022-11-18 18:29:32,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 138 transitions, 371 flow [2022-11-18 18:29:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:29:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:29:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 768 transitions. [2022-11-18 18:29:32,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8533333333333334 [2022-11-18 18:29:32,469 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 768 transitions. [2022-11-18 18:29:32,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 768 transitions. [2022-11-18 18:29:32,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:29:32,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 768 transitions. [2022-11-18 18:29:32,472 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) [2022-11-18 18:29:32,474 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) [2022-11-18 18:29:32,475 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) [2022-11-18 18:29:32,475 INFO L175 Difference]: Start difference. First operand has 135 places, 133 transitions, 302 flow. Second operand 6 states and 768 transitions. [2022-11-18 18:29:32,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 138 transitions, 371 flow [2022-11-18 18:29:32,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:29:32,481 INFO L231 Difference]: Finished difference. Result has 140 places, 134 transitions, 319 flow [2022-11-18 18:29:32,481 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} [2022-11-18 18:29:32,483 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 5 predicate places. [2022-11-18 18:29:32,483 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 134 transitions, 319 flow [2022-11-18 18:29:32,484 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) [2022-11-18 18:29:32,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:32,484 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] [2022-11-18 18:29:32,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:29:32,484 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash 794893440, now seen corresponding path program 1 times [2022-11-18 18:29:32,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:32,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562471120] [2022-11-18 18:29:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:32,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:32,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:29:32,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567474112] [2022-11-18 18:29:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:32,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:32,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:32,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:32,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:29:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:32,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:29:32,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:33,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:33,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:33,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562471120] [2022-11-18 18:29:33,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:29:33,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567474112] [2022-11-18 18:29:33,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567474112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:33,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:33,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:29:33,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366105974] [2022-11-18 18:29:33,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:33,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:29:33,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:33,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:29:33,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:29:33,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 150 [2022-11-18 18:29:33,507 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) [2022-11-18 18:29:33,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:33,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 150 [2022-11-18 18:29:33,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:29:33,755 INFO L130 PetriNetUnfolder]: 45/469 cut-off events. [2022-11-18 18:29:33,756 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-11-18 18:29:33,757 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. [2022-11-18 18:29:33,760 INFO L137 encePairwiseOnDemand]: 141/150 looper letters, 32 selfloop transitions, 8 changer transitions 0/149 dead transitions. [2022-11-18 18:29:33,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 149 transitions, 454 flow [2022-11-18 18:29:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:29:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 18:29:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 998 transitions. [2022-11-18 18:29:33,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8316666666666667 [2022-11-18 18:29:33,764 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 998 transitions. [2022-11-18 18:29:33,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 998 transitions. [2022-11-18 18:29:33,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:29:33,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 998 transitions. [2022-11-18 18:29:33,770 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) [2022-11-18 18:29:33,773 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) [2022-11-18 18:29:33,774 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) [2022-11-18 18:29:33,774 INFO L175 Difference]: Start difference. First operand has 140 places, 134 transitions, 319 flow. Second operand 8 states and 998 transitions. [2022-11-18 18:29:33,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 149 transitions, 454 flow [2022-11-18 18:29:33,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 149 transitions, 446 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 18:29:33,780 INFO L231 Difference]: Finished difference. Result has 144 places, 136 transitions, 347 flow [2022-11-18 18:29:33,781 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} [2022-11-18 18:29:33,798 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 9 predicate places. [2022-11-18 18:29:33,798 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 136 transitions, 347 flow [2022-11-18 18:29:33,800 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) [2022-11-18 18:29:33,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:33,800 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] [2022-11-18 18:29:33,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:34,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:34,008 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash 791710752, now seen corresponding path program 1 times [2022-11-18 18:29:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:34,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681372651] [2022-11-18 18:29:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:34,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:34,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:29:34,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713148222] [2022-11-18 18:29:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:34,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:34,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:34,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:34,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:29:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:34,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:29:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:34,358 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 [2022-11-18 18:29:34,459 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:29:34,460 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 [2022-11-18 18:29:34,514 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-18 18:29:34,515 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 [2022-11-18 18:29:34,733 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 [2022-11-18 18:29:34,989 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 [2022-11-18 18:29:35,080 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 [2022-11-18 18:29:35,606 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 [2022-11-18 18:29:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:35,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:35,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:35,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681372651] [2022-11-18 18:29:35,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:29:35,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713148222] [2022-11-18 18:29:35,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713148222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:35,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:35,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-18 18:29:35,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817274594] [2022-11-18 18:29:35,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:35,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:29:35,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:29:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:29:35,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-18 18:29:35,962 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) [2022-11-18 18:29:35,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:35,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-18 18:29:35,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:29:37,314 INFO L130 PetriNetUnfolder]: 1824/4593 cut-off events. [2022-11-18 18:29:37,315 INFO L131 PetriNetUnfolder]: For 630/630 co-relation queries the response was YES. [2022-11-18 18:29:37,328 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. [2022-11-18 18:29:37,345 INFO L137 encePairwiseOnDemand]: 124/150 looper letters, 153 selfloop transitions, 64 changer transitions 20/316 dead transitions. [2022-11-18 18:29:37,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 316 transitions, 1219 flow [2022-11-18 18:29:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 18:29:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-18 18:29:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2147 transitions. [2022-11-18 18:29:37,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6223188405797101 [2022-11-18 18:29:37,353 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2147 transitions. [2022-11-18 18:29:37,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2147 transitions. [2022-11-18 18:29:37,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:29:37,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2147 transitions. [2022-11-18 18:29:37,360 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) [2022-11-18 18:29:37,367 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) [2022-11-18 18:29:37,369 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) [2022-11-18 18:29:37,369 INFO L175 Difference]: Start difference. First operand has 144 places, 136 transitions, 347 flow. Second operand 23 states and 2147 transitions. [2022-11-18 18:29:37,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 316 transitions, 1219 flow [2022-11-18 18:29:37,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 316 transitions, 1204 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-18 18:29:37,378 INFO L231 Difference]: Finished difference. Result has 175 places, 200 transitions, 764 flow [2022-11-18 18:29:37,378 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} [2022-11-18 18:29:37,379 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 40 predicate places. [2022-11-18 18:29:37,379 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 200 transitions, 764 flow [2022-11-18 18:29:37,380 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) [2022-11-18 18:29:37,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:37,381 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] [2022-11-18 18:29:37,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:37,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:29:37,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:37,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1295349294, now seen corresponding path program 2 times [2022-11-18 18:29:37,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:37,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968354030] [2022-11-18 18:29:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:37,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:37,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:29:37,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784251520] [2022-11-18 18:29:37,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:29:37,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:37,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:37,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:37,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:29:37,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:29:37,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:29:37,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:29:37,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:37,842 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 [2022-11-18 18:29:37,924 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:29:37,925 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 [2022-11-18 18:29:37,973 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-18 18:29:37,974 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 [2022-11-18 18:29:38,241 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 [2022-11-18 18:29:38,342 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 [2022-11-18 18:29:38,585 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 [2022-11-18 18:29:38,983 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 [2022-11-18 18:29:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:39,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:39,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:39,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968354030] [2022-11-18 18:29:39,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:29:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784251520] [2022-11-18 18:29:39,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784251520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:39,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:39,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-18 18:29:39,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124178599] [2022-11-18 18:29:39,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:39,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:29:39,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:39,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:29:39,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:29:39,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-18 18:29:39,294 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) [2022-11-18 18:29:39,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:39,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-18 18:29:39,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:29:41,822 INFO L130 PetriNetUnfolder]: 3189/8483 cut-off events. [2022-11-18 18:29:41,823 INFO L131 PetriNetUnfolder]: For 17952/18073 co-relation queries the response was YES. [2022-11-18 18:29:41,882 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. [2022-11-18 18:29:41,931 INFO L137 encePairwiseOnDemand]: 124/150 looper letters, 247 selfloop transitions, 69 changer transitions 0/395 dead transitions. [2022-11-18 18:29:41,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 395 transitions, 2329 flow [2022-11-18 18:29:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:29:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-18 18:29:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1524 transitions. [2022-11-18 18:29:41,937 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.635 [2022-11-18 18:29:41,937 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1524 transitions. [2022-11-18 18:29:41,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1524 transitions. [2022-11-18 18:29:41,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:29:41,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1524 transitions. [2022-11-18 18:29:41,944 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) [2022-11-18 18:29:41,949 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) [2022-11-18 18:29:41,950 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) [2022-11-18 18:29:41,951 INFO L175 Difference]: Start difference. First operand has 175 places, 200 transitions, 764 flow. Second operand 16 states and 1524 transitions. [2022-11-18 18:29:41,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 395 transitions, 2329 flow [2022-11-18 18:29:41,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 395 transitions, 2321 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 18:29:41,999 INFO L231 Difference]: Finished difference. Result has 196 places, 253 transitions, 1397 flow [2022-11-18 18:29:42,000 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} [2022-11-18 18:29:42,001 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 61 predicate places. [2022-11-18 18:29:42,001 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 253 transitions, 1397 flow [2022-11-18 18:29:42,002 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) [2022-11-18 18:29:42,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:42,002 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] [2022-11-18 18:29:42,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:42,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:29:42,209 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:42,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash 167897142, now seen corresponding path program 3 times [2022-11-18 18:29:42,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:42,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133493496] [2022-11-18 18:29:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:42,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:42,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:29:42,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564394204] [2022-11-18 18:29:42,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:29:42,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:42,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:42,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:42,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:29:42,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 18:29:42,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:29:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:29:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:42,526 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 [2022-11-18 18:29:42,608 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:29:42,608 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 [2022-11-18 18:29:42,656 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-18 18:29:42,656 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 [2022-11-18 18:29:42,841 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 [2022-11-18 18:29:42,939 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 [2022-11-18 18:29:43,140 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 [2022-11-18 18:29:43,556 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 [2022-11-18 18:29:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:43,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133493496] [2022-11-18 18:29:43,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:29:43,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564394204] [2022-11-18 18:29:43,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564394204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:43,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:43,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-18 18:29:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632399509] [2022-11-18 18:29:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:43,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:29:43,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:29:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:29:43,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-18 18:29:43,847 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) [2022-11-18 18:29:43,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:43,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-18 18:29:43,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:29:47,065 INFO L130 PetriNetUnfolder]: 4220/11178 cut-off events. [2022-11-18 18:29:47,065 INFO L131 PetriNetUnfolder]: For 67512/67866 co-relation queries the response was YES. [2022-11-18 18:29:47,152 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. [2022-11-18 18:29:47,230 INFO L137 encePairwiseOnDemand]: 128/150 looper letters, 279 selfloop transitions, 106 changer transitions 5/469 dead transitions. [2022-11-18 18:29:47,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 469 transitions, 3881 flow [2022-11-18 18:29:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 18:29:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-18 18:29:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1898 transitions. [2022-11-18 18:29:47,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6326666666666667 [2022-11-18 18:29:47,237 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1898 transitions. [2022-11-18 18:29:47,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1898 transitions. [2022-11-18 18:29:47,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:29:47,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1898 transitions. [2022-11-18 18:29:47,245 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) [2022-11-18 18:29:47,251 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) [2022-11-18 18:29:47,253 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) [2022-11-18 18:29:47,253 INFO L175 Difference]: Start difference. First operand has 196 places, 253 transitions, 1397 flow. Second operand 20 states and 1898 transitions. [2022-11-18 18:29:47,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 469 transitions, 3881 flow [2022-11-18 18:29:47,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 469 transitions, 3790 flow, removed 42 selfloop flow, removed 4 redundant places. [2022-11-18 18:29:47,405 INFO L231 Difference]: Finished difference. Result has 223 places, 308 transitions, 2191 flow [2022-11-18 18:29:47,406 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} [2022-11-18 18:29:47,406 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 88 predicate places. [2022-11-18 18:29:47,407 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 308 transitions, 2191 flow [2022-11-18 18:29:47,408 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) [2022-11-18 18:29:47,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:47,408 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] [2022-11-18 18:29:47,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:47,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:47,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:47,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:47,617 INFO L85 PathProgramCache]: Analyzing trace with hash 594756190, now seen corresponding path program 4 times [2022-11-18 18:29:47,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:47,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929870188] [2022-11-18 18:29:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:47,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:47,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:29:47,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435287407] [2022-11-18 18:29:47,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:29:47,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:47,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:47,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:47,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:29:47,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:29:47,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:29:47,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:29:47,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:47,975 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 [2022-11-18 18:29:48,058 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:29:48,058 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 [2022-11-18 18:29:48,086 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:29:48,087 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 [2022-11-18 18:29:48,238 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 [2022-11-18 18:29:48,340 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 [2022-11-18 18:29:48,553 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 [2022-11-18 18:29:49,013 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 [2022-11-18 18:29:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:49,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:49,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929870188] [2022-11-18 18:29:49,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:29:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435287407] [2022-11-18 18:29:49,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435287407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:49,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:49,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-18 18:29:49,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604176526] [2022-11-18 18:29:49,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:49,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:29:49,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:49,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:29:49,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:29:49,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-18 18:29:49,272 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) [2022-11-18 18:29:49,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:49,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-18 18:29:49,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:29:52,749 INFO L130 PetriNetUnfolder]: 5142/13679 cut-off events. [2022-11-18 18:29:52,749 INFO L131 PetriNetUnfolder]: For 129730/130224 co-relation queries the response was YES. [2022-11-18 18:29:52,835 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. [2022-11-18 18:29:52,914 INFO L137 encePairwiseOnDemand]: 128/150 looper letters, 322 selfloop transitions, 71 changer transitions 8/480 dead transitions. [2022-11-18 18:29:52,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 480 transitions, 4748 flow [2022-11-18 18:29:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:29:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 18:29:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1771 transitions. [2022-11-18 18:29:52,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6214035087719298 [2022-11-18 18:29:52,919 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1771 transitions. [2022-11-18 18:29:52,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1771 transitions. [2022-11-18 18:29:52,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:29:52,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1771 transitions. [2022-11-18 18:29:52,925 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) [2022-11-18 18:29:52,930 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) [2022-11-18 18:29:52,932 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) [2022-11-18 18:29:52,932 INFO L175 Difference]: Start difference. First operand has 223 places, 308 transitions, 2191 flow. Second operand 19 states and 1771 transitions. [2022-11-18 18:29:52,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 480 transitions, 4748 flow [2022-11-18 18:29:53,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 480 transitions, 4638 flow, removed 47 selfloop flow, removed 4 redundant places. [2022-11-18 18:29:53,189 INFO L231 Difference]: Finished difference. Result has 246 places, 356 transitions, 2977 flow [2022-11-18 18:29:53,189 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} [2022-11-18 18:29:53,190 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 111 predicate places. [2022-11-18 18:29:53,190 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 356 transitions, 2977 flow [2022-11-18 18:29:53,191 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) [2022-11-18 18:29:53,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:29:53,191 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] [2022-11-18 18:29:53,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:53,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:53,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:29:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1468702446, now seen corresponding path program 5 times [2022-11-18 18:29:53,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:53,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654466574] [2022-11-18 18:29:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:53,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:53,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:29:53,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207969479] [2022-11-18 18:29:53,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:29:53,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:53,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:53,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:53,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:29:53,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:29:53,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:29:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:29:53,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:53,658 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 [2022-11-18 18:29:53,744 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:29:53,744 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 [2022-11-18 18:29:53,787 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-18 18:29:53,787 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 [2022-11-18 18:29:53,948 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 [2022-11-18 18:29:54,092 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 [2022-11-18 18:29:54,300 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 [2022-11-18 18:29:54,659 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 [2022-11-18 18:29:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:54,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:54,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:54,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654466574] [2022-11-18 18:29:54,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:29:54,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207969479] [2022-11-18 18:29:54,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207969479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:54,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:54,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-18 18:29:54,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35543447] [2022-11-18 18:29:54,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:54,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:29:54,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:54,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:29:54,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:29:54,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-18 18:29:54,910 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) [2022-11-18 18:29:54,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:29:54,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-18 18:29:54,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:30:00,313 INFO L130 PetriNetUnfolder]: 7669/20609 cut-off events. [2022-11-18 18:30:00,313 INFO L131 PetriNetUnfolder]: For 236821/237489 co-relation queries the response was YES. [2022-11-18 18:30:00,692 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. [2022-11-18 18:30:00,803 INFO L137 encePairwiseOnDemand]: 127/150 looper letters, 407 selfloop transitions, 103 changer transitions 1/590 dead transitions. [2022-11-18 18:30:00,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 590 transitions, 6496 flow [2022-11-18 18:30:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:30:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 18:30:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1795 transitions. [2022-11-18 18:30:00,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6298245614035087 [2022-11-18 18:30:00,808 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1795 transitions. [2022-11-18 18:30:00,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1795 transitions. [2022-11-18 18:30:00,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:30:00,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1795 transitions. [2022-11-18 18:30:00,813 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) [2022-11-18 18:30:00,819 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) [2022-11-18 18:30:00,820 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) [2022-11-18 18:30:00,821 INFO L175 Difference]: Start difference. First operand has 246 places, 356 transitions, 2977 flow. Second operand 19 states and 1795 transitions. [2022-11-18 18:30:00,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 590 transitions, 6496 flow [2022-11-18 18:30:01,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 590 transitions, 6367 flow, removed 54 selfloop flow, removed 5 redundant places. [2022-11-18 18:30:01,206 INFO L231 Difference]: Finished difference. Result has 271 places, 431 transitions, 4390 flow [2022-11-18 18:30:01,206 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} [2022-11-18 18:30:01,207 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 136 predicate places. [2022-11-18 18:30:01,207 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 431 transitions, 4390 flow [2022-11-18 18:30:01,208 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) [2022-11-18 18:30:01,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:30:01,208 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] [2022-11-18 18:30:01,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:01,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:01,416 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:30:01,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:01,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1408508846, now seen corresponding path program 6 times [2022-11-18 18:30:01,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:01,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306487467] [2022-11-18 18:30:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:01,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:30:01,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239015826] [2022-11-18 18:30:01,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:30:01,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:01,439 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:01,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:30:01,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-18 18:30:01,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:30:01,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:01,655 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 [2022-11-18 18:30:01,732 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:30:01,732 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 [2022-11-18 18:30:01,778 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-18 18:30:01,779 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 [2022-11-18 18:30:01,936 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 [2022-11-18 18:30:01,988 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 [2022-11-18 18:30:02,208 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 [2022-11-18 18:30:02,380 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 [2022-11-18 18:30:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:02,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:30:02,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:02,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306487467] [2022-11-18 18:30:02,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:30:02,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239015826] [2022-11-18 18:30:02,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239015826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:02,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:02,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-18 18:30:02,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156151028] [2022-11-18 18:30:02,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:02,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:30:02,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:02,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:30:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:30:02,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-18 18:30:02,557 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) [2022-11-18 18:30:02,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:30:02,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-18 18:30:02,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:30:10,446 INFO L130 PetriNetUnfolder]: 10280/27185 cut-off events. [2022-11-18 18:30:10,446 INFO L131 PetriNetUnfolder]: For 471036/472093 co-relation queries the response was YES. [2022-11-18 18:30:10,740 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. [2022-11-18 18:30:10,886 INFO L137 encePairwiseOnDemand]: 127/150 looper letters, 488 selfloop transitions, 113 changer transitions 4/684 dead transitions. [2022-11-18 18:30:10,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 684 transitions, 9036 flow [2022-11-18 18:30:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 18:30:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 18:30:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2239 transitions. [2022-11-18 18:30:10,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6219444444444444 [2022-11-18 18:30:10,892 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2239 transitions. [2022-11-18 18:30:10,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2239 transitions. [2022-11-18 18:30:10,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:30:10,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2239 transitions. [2022-11-18 18:30:10,899 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) [2022-11-18 18:30:10,906 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) [2022-11-18 18:30:10,907 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) [2022-11-18 18:30:10,907 INFO L175 Difference]: Start difference. First operand has 271 places, 431 transitions, 4390 flow. Second operand 24 states and 2239 transitions. [2022-11-18 18:30:10,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 684 transitions, 9036 flow [2022-11-18 18:30:11,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 684 transitions, 8669 flow, removed 180 selfloop flow, removed 4 redundant places. [2022-11-18 18:30:11,782 INFO L231 Difference]: Finished difference. Result has 307 places, 508 transitions, 5869 flow [2022-11-18 18:30:11,783 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} [2022-11-18 18:30:11,783 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 172 predicate places. [2022-11-18 18:30:11,783 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 508 transitions, 5869 flow [2022-11-18 18:30:11,784 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) [2022-11-18 18:30:11,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:30:11,784 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] [2022-11-18 18:30:11,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:11,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:30:11,986 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:30:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1253082283, now seen corresponding path program 1 times [2022-11-18 18:30:11,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:11,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594527441] [2022-11-18 18:30:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:11,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:12,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:30:12,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760228831] [2022-11-18 18:30:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:12,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:12,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:12,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:12,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:30:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:30:12,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:12,232 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 [2022-11-18 18:30:12,296 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:30:12,297 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 [2022-11-18 18:30:12,336 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-18 18:30:12,336 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 [2022-11-18 18:30:12,504 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 [2022-11-18 18:30:12,557 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 [2022-11-18 18:30:12,792 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 [2022-11-18 18:30:13,323 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 [2022-11-18 18:30:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:13,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:30:13,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594527441] [2022-11-18 18:30:13,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:30:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760228831] [2022-11-18 18:30:13,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760228831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:13,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:13,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-18 18:30:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164205732] [2022-11-18 18:30:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:30:13,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:30:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:30:13,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-18 18:30:13,597 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) [2022-11-18 18:30:13,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:30:13,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-18 18:30:13,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:30:24,102 INFO L130 PetriNetUnfolder]: 12501/33331 cut-off events. [2022-11-18 18:30:24,102 INFO L131 PetriNetUnfolder]: For 706264/707673 co-relation queries the response was YES. [2022-11-18 18:30:24,572 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. [2022-11-18 18:30:24,723 INFO L137 encePairwiseOnDemand]: 126/150 looper letters, 612 selfloop transitions, 164 changer transitions 4/859 dead transitions. [2022-11-18 18:30:24,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 859 transitions, 11839 flow [2022-11-18 18:30:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:30:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 18:30:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1820 transitions. [2022-11-18 18:30:24,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6385964912280702 [2022-11-18 18:30:24,727 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1820 transitions. [2022-11-18 18:30:24,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1820 transitions. [2022-11-18 18:30:24,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:30:24,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1820 transitions. [2022-11-18 18:30:24,731 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) [2022-11-18 18:30:24,735 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) [2022-11-18 18:30:24,736 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) [2022-11-18 18:30:24,736 INFO L175 Difference]: Start difference. First operand has 307 places, 508 transitions, 5869 flow. Second operand 19 states and 1820 transitions. [2022-11-18 18:30:24,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 859 transitions, 11839 flow [2022-11-18 18:30:26,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 859 transitions, 11436 flow, removed 198 selfloop flow, removed 4 redundant places. [2022-11-18 18:30:26,306 INFO L231 Difference]: Finished difference. Result has 334 places, 628 transitions, 8148 flow [2022-11-18 18:30:26,307 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} [2022-11-18 18:30:26,307 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 199 predicate places. [2022-11-18 18:30:26,308 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 628 transitions, 8148 flow [2022-11-18 18:30:26,308 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) [2022-11-18 18:30:26,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:30:26,309 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, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:26,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:30:26,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 18:30:26,513 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:30:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1727769949, now seen corresponding path program 2 times [2022-11-18 18:30:26,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:26,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378765514] [2022-11-18 18:30:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:26,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:26,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:30:26,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900661629] [2022-11-18 18:30:26,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:30:26,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:26,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:26,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:26,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:30:26,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:30:26,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:26,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:30:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:26,763 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 [2022-11-18 18:30:26,825 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:30:26,825 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 [2022-11-18 18:30:26,874 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-18 18:30:26,874 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 [2022-11-18 18:30:27,044 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 [2022-11-18 18:30:27,148 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 [2022-11-18 18:30:27,338 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 [2022-11-18 18:30:27,723 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 [2022-11-18 18:30:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:28,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:30:28,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:28,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378765514] [2022-11-18 18:30:28,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:30:28,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900661629] [2022-11-18 18:30:28,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900661629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:28,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:28,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-18 18:30:28,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433963806] [2022-11-18 18:30:28,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:28,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 18:30:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:28,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 18:30:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:30:28,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 150 [2022-11-18 18:30:28,029 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) [2022-11-18 18:30:28,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:30:28,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 150 [2022-11-18 18:30:28,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:30:41,503 INFO L130 PetriNetUnfolder]: 14526/38534 cut-off events. [2022-11-18 18:30:41,503 INFO L131 PetriNetUnfolder]: For 1251159/1252977 co-relation queries the response was YES. [2022-11-18 18:30:42,157 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. [2022-11-18 18:30:42,779 INFO L137 encePairwiseOnDemand]: 126/150 looper letters, 592 selfloop transitions, 224 changer transitions 8/903 dead transitions. [2022-11-18 18:30:42,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 903 transitions, 14167 flow [2022-11-18 18:30:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:30:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 18:30:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1591 transitions. [2022-11-18 18:30:42,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.623921568627451 [2022-11-18 18:30:42,784 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1591 transitions. [2022-11-18 18:30:42,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1591 transitions. [2022-11-18 18:30:42,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:30:42,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1591 transitions. [2022-11-18 18:30:42,790 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) [2022-11-18 18:30:42,794 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) [2022-11-18 18:30:42,796 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) [2022-11-18 18:30:42,796 INFO L175 Difference]: Start difference. First operand has 334 places, 628 transitions, 8148 flow. Second operand 17 states and 1591 transitions. [2022-11-18 18:30:42,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 903 transitions, 14167 flow [2022-11-18 18:30:46,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 903 transitions, 13576 flow, removed 292 selfloop flow, removed 4 redundant places. [2022-11-18 18:30:46,525 INFO L231 Difference]: Finished difference. Result has 357 places, 764 transitions, 11091 flow [2022-11-18 18:30:46,526 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} [2022-11-18 18:30:46,526 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 222 predicate places. [2022-11-18 18:30:46,527 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 764 transitions, 11091 flow [2022-11-18 18:30:46,527 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) [2022-11-18 18:30:46,528 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:30:46,528 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] [2022-11-18 18:30:46,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 18:30:46,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:30:46,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 18:30:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1013742977, now seen corresponding path program 3 times [2022-11-18 18:30:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:46,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722818333] [2022-11-18 18:30:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:46,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:46,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:30:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541689647] [2022-11-18 18:30:46,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:30:46,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:46,758 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:46,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_185e8ae6-42e3-4736-b7bc-3300289e31ad/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process