./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R --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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- 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-38b53e6 [2022-11-25 16:58:55,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:58:55,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:58:55,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:58:55,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:58:55,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:58:55,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:58:55,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:58:55,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:58:55,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:58:55,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:58:55,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:58:55,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:58:55,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:58:55,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:58:55,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:58:55,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:58:55,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:58:55,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:58:55,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:58:55,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:58:55,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:58:55,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:58:55,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:58:55,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:58:55,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:58:55,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:58:55,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:58:55,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:58:55,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:58:55,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:58:55,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:58:55,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:58:55,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:58:55,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:58:55,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:58:55,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:58:55,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:58:55,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:58:55,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:58:55,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:58:55,397 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:58:55,432 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:58:55,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:58:55,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:58:55,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:58:55,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:58:55,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:58:55,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:58:55,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:58:55,443 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:58:55,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:58:55,445 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:58:55,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:58:55,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:58:55,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:58:55,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:58:55,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:58:55,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:58:55,447 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:58:55,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:58:55,448 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:58:55,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:58:55,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:58:55,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:58:55,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:58:55,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:58:55,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:58:55,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:58:55,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:58:55,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:58:55,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:58:55,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:58:55,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:58:55,452 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:58:55,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:58:55,453 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-11-25 16:58:55,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:58:55,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:58:55,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:58:55,743 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:58:55,745 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:58:55,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-25 16:58:58,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:58:59,332 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:58:59,333 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-25 16:58:59,360 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/data/e2d90ac45/c425dd9d7d7a4eb8a2f8122676e4e1cb/FLAG8a5c40c12 [2022-11-25 16:58:59,382 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/data/e2d90ac45/c425dd9d7d7a4eb8a2f8122676e4e1cb [2022-11-25 16:58:59,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:58:59,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:58:59,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:58:59,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:58:59,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:58:59,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:58:59" (1/1) ... [2022-11-25 16:58:59,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d5cbbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:58:59, skipping insertion in model container [2022-11-25 16:58:59,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:58:59" (1/1) ... [2022-11-25 16:58:59,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:58:59,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:59:00,086 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-25 16:59:00,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:59:00,136 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:59:00,178 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-25 16:59:00,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:59:00,321 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:59:00,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00 WrapperNode [2022-11-25 16:59:00,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:59:00,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:59:00,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:59:00,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:59:00,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,407 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-11-25 16:59:00,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:59:00,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:59:00,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:59:00,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:59:00,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,456 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:59:00,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:59:00,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:59:00,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:59:00,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (1/1) ... [2022-11-25 16:59:00,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:59:00,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:00,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:59:00,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:59:00,563 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 16:59:00,563 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 16:59:00,564 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 16:59:00,564 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 16:59:00,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:59:00,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:59:00,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:59:00,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:59:00,565 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 16:59:00,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:59:00,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:59:00,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:59:00,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:59:00,567 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 16:59:00,733 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:59:00,736 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:59:01,115 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:59:01,126 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:59:01,126 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 16:59:01,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:59:01 BoogieIcfgContainer [2022-11-25 16:59:01,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:59:01,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:59:01,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:59:01,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:59:01,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:58:59" (1/3) ... [2022-11-25 16:59:01,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62528399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:59:01, skipping insertion in model container [2022-11-25 16:59:01,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:59:00" (2/3) ... [2022-11-25 16:59:01,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62528399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:59:01, skipping insertion in model container [2022-11-25 16:59:01,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:59:01" (3/3) ... [2022-11-25 16:59:01,140 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-11-25 16:59:01,150 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 16:59:01,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:59:01,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 16:59:01,163 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:59:01,265 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 16:59:01,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2022-11-25 16:59:01,399 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2022-11-25 16:59:01,400 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:59:01,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 408 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-25 16:59:01,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2022-11-25 16:59:01,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2022-11-25 16:59:01,423 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:59:01,463 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 158 transitions, 325 flow [2022-11-25 16:59:01,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 158 transitions, 325 flow [2022-11-25 16:59:01,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 325 flow [2022-11-25 16:59:01,548 INFO L130 PetriNetUnfolder]: 10/158 cut-off events. [2022-11-25 16:59:01,548 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 16:59:01,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 158 events. 10/158 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 323 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-25 16:59:01,560 INFO L119 LiptonReduction]: Number of co-enabled transitions 8324 [2022-11-25 16:59:06,971 INFO L134 LiptonReduction]: Checked pairs total: 10315 [2022-11-25 16:59:06,971 INFO L136 LiptonReduction]: Total number of compositions: 151 [2022-11-25 16:59:06,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:59:06,996 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;@741551c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:59:06,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 16:59:07,002 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-11-25 16:59:07,002 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 16:59:07,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:07,003 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 16:59:07,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:07,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1233761464, now seen corresponding path program 1 times [2022-11-25 16:59:07,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:07,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197458718] [2022-11-25 16:59:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:07,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:07,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:07,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197458718] [2022-11-25 16:59:07,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197458718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:07,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:07,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:59:07,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232673602] [2022-11-25 16:59:07,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:07,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:07,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:07,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 321 [2022-11-25 16:59:07,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:07,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 321 [2022-11-25 16:59:07,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:07,803 INFO L130 PetriNetUnfolder]: 539/918 cut-off events. [2022-11-25 16:59:07,803 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-25 16:59:07,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 918 events. 539/918 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3445 event pairs, 227 based on Foata normal form. 20/748 useless extension candidates. Maximal degree in co-relation 1680. Up to 573 conditions per place. [2022-11-25 16:59:07,812 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2022-11-25 16:59:07,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 215 flow [2022-11-25 16:59:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2022-11-25 16:59:07,838 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5264797507788161 [2022-11-25 16:59:07,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2022-11-25 16:59:07,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2022-11-25 16:59:07,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:07,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2022-11-25 16:59:07,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,869 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 507 transitions. [2022-11-25 16:59:07,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 215 flow [2022-11-25 16:59:07,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 16:59:07,881 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2022-11-25 16:59:07,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2022-11-25 16:59:07,889 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2022-11-25 16:59:07,890 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2022-11-25 16:59:07,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,891 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:07,891 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:07,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:59:07,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:07,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2019811899, now seen corresponding path program 1 times [2022-11-25 16:59:07,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:07,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212662934] [2022-11-25 16:59:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:07,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:08,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212662934] [2022-11-25 16:59:08,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212662934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:08,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:08,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:59:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64168988] [2022-11-25 16:59:08,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:08,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:08,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:08,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:08,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:08,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 321 [2022-11-25 16:59:08,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:08,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:08,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 321 [2022-11-25 16:59:08,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:08,305 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2022-11-25 16:59:08,305 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-11-25 16:59:08,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1022 events. 593/1022 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4459 event pairs, 271 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1916. Up to 877 conditions per place. [2022-11-25 16:59:08,312 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2022-11-25 16:59:08,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2022-11-25 16:59:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:08,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2022-11-25 16:59:08,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5327102803738317 [2022-11-25 16:59:08,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2022-11-25 16:59:08,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2022-11-25 16:59:08,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:08,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2022-11-25 16:59:08,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:08,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:08,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:08,322 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 513 transitions. [2022-11-25 16:59:08,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2022-11-25 16:59:08,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:59:08,324 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2022-11-25 16:59:08,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2022-11-25 16:59:08,325 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2022-11-25 16:59:08,326 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2022-11-25 16:59:08,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:08,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:08,327 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:08,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:59:08,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:08,333 INFO L85 PathProgramCache]: Analyzing trace with hash 277526988, now seen corresponding path program 1 times [2022-11-25 16:59:08,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:08,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066484116] [2022-11-25 16:59:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:08,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:08,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:08,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066484116] [2022-11-25 16:59:08,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066484116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:08,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921540663] [2022-11-25 16:59:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:08,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:08,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:08,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:08,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:59:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:59:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:08,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:08,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921540663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:59:08,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:59:08,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-25 16:59:08,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285112439] [2022-11-25 16:59:08,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:59:08,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:59:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:59:08,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 321 [2022-11-25 16:59:08,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 151.4) internal successors, (1514), 10 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:08,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:08,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 321 [2022-11-25 16:59:08,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:09,680 INFO L130 PetriNetUnfolder]: 1619/2654 cut-off events. [2022-11-25 16:59:09,680 INFO L131 PetriNetUnfolder]: For 840/840 co-relation queries the response was YES. [2022-11-25 16:59:09,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6125 conditions, 2654 events. 1619/2654 cut-off events. For 840/840 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12082 event pairs, 246 based on Foata normal form. 82/2392 useless extension candidates. Maximal degree in co-relation 5686. Up to 795 conditions per place. [2022-11-25 16:59:09,698 INFO L137 encePairwiseOnDemand]: 313/321 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2022-11-25 16:59:09,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2022-11-25 16:59:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:59:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 16:59:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1963 transitions. [2022-11-25 16:59:09,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5096053997923157 [2022-11-25 16:59:09,706 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1963 transitions. [2022-11-25 16:59:09,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1963 transitions. [2022-11-25 16:59:09,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:09,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1963 transitions. [2022-11-25 16:59:09,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.58333333333334) internal successors, (1963), 12 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:09,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 321.0) internal successors, (4173), 13 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:09,725 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 321.0) internal successors, (4173), 13 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:09,725 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1963 transitions. [2022-11-25 16:59:09,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2022-11-25 16:59:09,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 184 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:59:09,739 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2022-11-25 16:59:09,739 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2022-11-25 16:59:09,741 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2022-11-25 16:59:09,741 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2022-11-25 16:59:09,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.4) internal successors, (1514), 10 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:09,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:09,744 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:09,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 16:59:09,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:09,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1094569775, now seen corresponding path program 1 times [2022-11-25 16:59:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571254190] [2022-11-25 16:59:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:09,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:10,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:10,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571254190] [2022-11-25 16:59:10,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571254190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:10,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:10,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:59:10,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630887312] [2022-11-25 16:59:10,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:10,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:10,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:10,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:10,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:10,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 321 [2022-11-25 16:59:10,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:10,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 321 [2022-11-25 16:59:10,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:10,396 INFO L130 PetriNetUnfolder]: 512/977 cut-off events. [2022-11-25 16:59:10,396 INFO L131 PetriNetUnfolder]: For 560/560 co-relation queries the response was YES. [2022-11-25 16:59:10,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 977 events. 512/977 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4144 event pairs, 98 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 2360. Up to 670 conditions per place. [2022-11-25 16:59:10,403 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2022-11-25 16:59:10,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 342 flow [2022-11-25 16:59:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2022-11-25 16:59:10,405 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5192107995846313 [2022-11-25 16:59:10,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2022-11-25 16:59:10,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2022-11-25 16:59:10,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:10,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2022-11-25 16:59:10,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,411 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 500 transitions. [2022-11-25 16:59:10,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 342 flow [2022-11-25 16:59:10,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 321 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-25 16:59:10,423 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2022-11-25 16:59:10,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2022-11-25 16:59:10,425 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2022-11-25 16:59:10,425 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2022-11-25 16:59:10,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:10,426 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:10,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:59:10,426 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash 289562230, now seen corresponding path program 1 times [2022-11-25 16:59:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:10,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766330923] [2022-11-25 16:59:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:10,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:10,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:10,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766330923] [2022-11-25 16:59:10,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766330923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:10,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:10,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:59:10,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540592063] [2022-11-25 16:59:10,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:10,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:10,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:10,522 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 321 [2022-11-25 16:59:10,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:10,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 321 [2022-11-25 16:59:10,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:10,743 INFO L130 PetriNetUnfolder]: 575/1096 cut-off events. [2022-11-25 16:59:10,743 INFO L131 PetriNetUnfolder]: For 445/445 co-relation queries the response was YES. [2022-11-25 16:59:10,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1096 events. 575/1096 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4617 event pairs, 353 based on Foata normal form. 24/1120 useless extension candidates. Maximal degree in co-relation 2270. Up to 773 conditions per place. [2022-11-25 16:59:10,750 INFO L137 encePairwiseOnDemand]: 315/321 looper letters, 50 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-11-25 16:59:10,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 367 flow [2022-11-25 16:59:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:59:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2022-11-25 16:59:10,753 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5244029075804777 [2022-11-25 16:59:10,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2022-11-25 16:59:10,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2022-11-25 16:59:10,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:10,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2022-11-25 16:59:10,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,758 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 505 transitions. [2022-11-25 16:59:10,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 367 flow [2022-11-25 16:59:10,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:59:10,763 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2022-11-25 16:59:10,763 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2022-11-25 16:59:10,764 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2022-11-25 16:59:10,764 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2022-11-25 16:59:10,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:10,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:10,765 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:10,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:59:10,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:10,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash 895018887, now seen corresponding path program 1 times [2022-11-25 16:59:10,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:10,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852753761] [2022-11-25 16:59:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:10,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:11,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:11,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852753761] [2022-11-25 16:59:11,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852753761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:11,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:11,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 16:59:11,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471327888] [2022-11-25 16:59:11,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:11,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:59:11,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:11,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:59:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:59:12,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 321 [2022-11-25 16:59:12,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:12,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:12,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 321 [2022-11-25 16:59:12,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:13,456 INFO L130 PetriNetUnfolder]: 844/1612 cut-off events. [2022-11-25 16:59:13,456 INFO L131 PetriNetUnfolder]: For 1177/1177 co-relation queries the response was YES. [2022-11-25 16:59:13,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4119 conditions, 1612 events. 844/1612 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7818 event pairs, 249 based on Foata normal form. 0/1589 useless extension candidates. Maximal degree in co-relation 2456. Up to 886 conditions per place. [2022-11-25 16:59:13,466 INFO L137 encePairwiseOnDemand]: 311/321 looper letters, 89 selfloop transitions, 11 changer transitions 13/122 dead transitions. [2022-11-25 16:59:13,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 717 flow [2022-11-25 16:59:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:59:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:59:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1343 transitions. [2022-11-25 16:59:13,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4648667358947733 [2022-11-25 16:59:13,472 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1343 transitions. [2022-11-25 16:59:13,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1343 transitions. [2022-11-25 16:59:13,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:13,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1343 transitions. [2022-11-25 16:59:13,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.22222222222223) internal successors, (1343), 9 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,485 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,485 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1343 transitions. [2022-11-25 16:59:13,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 717 flow [2022-11-25 16:59:13,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 122 transitions, 677 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-25 16:59:13,493 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 310 flow [2022-11-25 16:59:13,494 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2022-11-25 16:59:13,496 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2022-11-25 16:59:13,498 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 310 flow [2022-11-25 16:59:13,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,499 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:13,499 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:13,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:59:13,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:13,501 INFO L85 PathProgramCache]: Analyzing trace with hash -372561305, now seen corresponding path program 2 times [2022-11-25 16:59:13,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:13,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510943671] [2022-11-25 16:59:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:13,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:14,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:14,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510943671] [2022-11-25 16:59:14,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510943671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:14,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:14,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 16:59:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423929414] [2022-11-25 16:59:14,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:59:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:14,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:59:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:59:15,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 321 [2022-11-25 16:59:15,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 310 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:15,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:15,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 321 [2022-11-25 16:59:15,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:16,233 INFO L130 PetriNetUnfolder]: 1096/2088 cut-off events. [2022-11-25 16:59:16,234 INFO L131 PetriNetUnfolder]: For 1258/1258 co-relation queries the response was YES. [2022-11-25 16:59:16,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 2088 events. 1096/2088 cut-off events. For 1258/1258 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10747 event pairs, 301 based on Foata normal form. 0/2059 useless extension candidates. Maximal degree in co-relation 3995. Up to 839 conditions per place. [2022-11-25 16:59:16,248 INFO L137 encePairwiseOnDemand]: 312/321 looper letters, 89 selfloop transitions, 16 changer transitions 13/127 dead transitions. [2022-11-25 16:59:16,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 784 flow [2022-11-25 16:59:16,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:59:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 16:59:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1343 transitions. [2022-11-25 16:59:16,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4648667358947733 [2022-11-25 16:59:16,254 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1343 transitions. [2022-11-25 16:59:16,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1343 transitions. [2022-11-25 16:59:16,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:16,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1343 transitions. [2022-11-25 16:59:16,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.22222222222223) internal successors, (1343), 9 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,264 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,265 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 310 flow. Second operand 9 states and 1343 transitions. [2022-11-25 16:59:16,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 784 flow [2022-11-25 16:59:16,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:59:16,275 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 406 flow [2022-11-25 16:59:16,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2022-11-25 16:59:16,277 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2022-11-25 16:59:16,277 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 406 flow [2022-11-25 16:59:16,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:16,279 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:16,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:59:16,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:16,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1617108449, now seen corresponding path program 1 times [2022-11-25 16:59:16,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:16,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40043698] [2022-11-25 16:59:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:16,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:16,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:16,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40043698] [2022-11-25 16:59:16,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40043698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:16,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214686844] [2022-11-25 16:59:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:16,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:16,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:16,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:16,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:59:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:16,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:59:16,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:59:16,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:59:16,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214686844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:16,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:59:16,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-25 16:59:16,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593826644] [2022-11-25 16:59:16,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:16,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:59:16,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:16,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:59:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:59:16,695 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 321 [2022-11-25 16:59:16,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:16,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:16,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 321 [2022-11-25 16:59:16,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:17,139 INFO L130 PetriNetUnfolder]: 1190/2211 cut-off events. [2022-11-25 16:59:17,139 INFO L131 PetriNetUnfolder]: For 1984/1984 co-relation queries the response was YES. [2022-11-25 16:59:17,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 2211 events. 1190/2211 cut-off events. For 1984/1984 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10850 event pairs, 493 based on Foata normal form. 34/2225 useless extension candidates. Maximal degree in co-relation 4719. Up to 933 conditions per place. [2022-11-25 16:59:17,156 INFO L137 encePairwiseOnDemand]: 313/321 looper letters, 101 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2022-11-25 16:59:17,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 862 flow [2022-11-25 16:59:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:59:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 16:59:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 960 transitions. [2022-11-25 16:59:17,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4984423676012461 [2022-11-25 16:59:17,160 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 960 transitions. [2022-11-25 16:59:17,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 960 transitions. [2022-11-25 16:59:17,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:17,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 960 transitions. [2022-11-25 16:59:17,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:17,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:17,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:17,199 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 406 flow. Second operand 6 states and 960 transitions. [2022-11-25 16:59:17,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 862 flow [2022-11-25 16:59:17,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 834 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-11-25 16:59:17,213 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 507 flow [2022-11-25 16:59:17,213 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-11-25 16:59:17,216 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2022-11-25 16:59:17,217 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 507 flow [2022-11-25 16:59:17,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:17,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:17,218 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 16:59:17,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:17,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:17,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:17,425 INFO L85 PathProgramCache]: Analyzing trace with hash 221800012, now seen corresponding path program 2 times [2022-11-25 16:59:17,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:17,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552007469] [2022-11-25 16:59:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:17,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:17,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:17,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552007469] [2022-11-25 16:59:17,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552007469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191261649] [2022-11-25 16:59:17,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:59:17,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:17,733 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:17,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:59:17,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:59:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:59:17,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:59:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:17,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:18,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191261649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:59:18,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:59:18,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-11-25 16:59:18,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904680419] [2022-11-25 16:59:18,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:18,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 16:59:18,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:18,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 16:59:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-11-25 16:59:18,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 321 [2022-11-25 16:59:18,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 507 flow. Second operand has 20 states, 20 states have (on average 148.3) internal successors, (2966), 20 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:18,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:18,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 321 [2022-11-25 16:59:18,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:19,241 INFO L130 PetriNetUnfolder]: 1638/3035 cut-off events. [2022-11-25 16:59:19,241 INFO L131 PetriNetUnfolder]: For 3939/3939 co-relation queries the response was YES. [2022-11-25 16:59:19,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9050 conditions, 3035 events. 1638/3035 cut-off events. For 3939/3939 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 13961 event pairs, 352 based on Foata normal form. 32/3047 useless extension candidates. Maximal degree in co-relation 7670. Up to 936 conditions per place. [2022-11-25 16:59:19,266 INFO L137 encePairwiseOnDemand]: 313/321 looper letters, 214 selfloop transitions, 45 changer transitions 6/265 dead transitions. [2022-11-25 16:59:19,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 265 transitions, 1820 flow [2022-11-25 16:59:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 16:59:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 16:59:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3285 transitions. [2022-11-25 16:59:19,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48731642189586116 [2022-11-25 16:59:19,277 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3285 transitions. [2022-11-25 16:59:19,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3285 transitions. [2022-11-25 16:59:19,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:19,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3285 transitions. [2022-11-25 16:59:19,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 156.42857142857142) internal successors, (3285), 21 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:19,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:19,300 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:19,300 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 507 flow. Second operand 21 states and 3285 transitions. [2022-11-25 16:59:19,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 265 transitions, 1820 flow [2022-11-25 16:59:19,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 265 transitions, 1816 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-25 16:59:19,323 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 888 flow [2022-11-25 16:59:19,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=888, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2022-11-25 16:59:19,324 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2022-11-25 16:59:19,324 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 888 flow [2022-11-25 16:59:19,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 148.3) internal successors, (2966), 20 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:19,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:19,326 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:19,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 16:59:19,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:19,533 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1206111711, now seen corresponding path program 3 times [2022-11-25 16:59:19,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:19,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677032521] [2022-11-25 16:59:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:19,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:59:20,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:20,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677032521] [2022-11-25 16:59:20,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677032521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:20,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:20,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 16:59:20,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378650277] [2022-11-25 16:59:20,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:20,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:59:20,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:59:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:59:21,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 321 [2022-11-25 16:59:21,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 888 flow. Second operand has 15 states, 15 states have (on average 131.86666666666667) internal successors, (1978), 15 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:21,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:21,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 321 [2022-11-25 16:59:21,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:24,555 INFO L130 PetriNetUnfolder]: 2655/4959 cut-off events. [2022-11-25 16:59:24,556 INFO L131 PetriNetUnfolder]: For 9601/9601 co-relation queries the response was YES. [2022-11-25 16:59:24,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16702 conditions, 4959 events. 2655/4959 cut-off events. For 9601/9601 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 26222 event pairs, 670 based on Foata normal form. 0/4931 useless extension candidates. Maximal degree in co-relation 15140. Up to 1528 conditions per place. [2022-11-25 16:59:24,595 INFO L137 encePairwiseOnDemand]: 303/321 looper letters, 140 selfloop transitions, 131 changer transitions 4/285 dead transitions. [2022-11-25 16:59:24,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 285 transitions, 2535 flow [2022-11-25 16:59:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 16:59:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 16:59:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3669 transitions. [2022-11-25 16:59:24,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42332987192800275 [2022-11-25 16:59:24,607 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3669 transitions. [2022-11-25 16:59:24,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3669 transitions. [2022-11-25 16:59:24,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:24,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3669 transitions. [2022-11-25 16:59:24,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 135.88888888888889) internal successors, (3669), 27 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:24,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 321.0) internal successors, (8988), 28 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:24,637 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 321.0) internal successors, (8988), 28 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:24,637 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 888 flow. Second operand 27 states and 3669 transitions. [2022-11-25 16:59:24,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 285 transitions, 2535 flow [2022-11-25 16:59:24,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 285 transitions, 2320 flow, removed 78 selfloop flow, removed 8 redundant places. [2022-11-25 16:59:24,694 INFO L231 Difference]: Finished difference. Result has 135 places, 191 transitions, 1927 flow [2022-11-25 16:59:24,694 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1927, PETRI_PLACES=135, PETRI_TRANSITIONS=191} [2022-11-25 16:59:24,695 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2022-11-25 16:59:24,695 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 191 transitions, 1927 flow [2022-11-25 16:59:24,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.86666666666667) internal successors, (1978), 15 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:24,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:24,697 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:24,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:59:24,697 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1077365291, now seen corresponding path program 4 times [2022-11-25 16:59:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:24,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092020964] [2022-11-25 16:59:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:24,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:26,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:26,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092020964] [2022-11-25 16:59:26,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092020964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498318957] [2022-11-25 16:59:26,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:59:26,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:26,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:26,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:59:26,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:59:26,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:59:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-25 16:59:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:26,334 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-25 16:59:26,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-25 16:59:26,845 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 19 treesize of output 15 [2022-11-25 16:59:26,970 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 56 treesize of output 52 [2022-11-25 16:59:27,746 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 76 treesize of output 44 [2022-11-25 16:59:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:27,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:28,383 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_360 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_360) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-25 16:59:28,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:59:28,399 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-25 16:59:28,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:59:28,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-25 16:59:28,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 22 [2022-11-25 16:59:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:59:28,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498318957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:59:28,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:59:28,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 46 [2022-11-25 16:59:28,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784244476] [2022-11-25 16:59:28,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:28,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 16:59:28,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 16:59:28,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1993, Unknown=1, NotChecked=90, Total=2256 [2022-11-25 16:59:29,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 321 [2022-11-25 16:59:29,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 191 transitions, 1927 flow. Second operand has 48 states, 48 states have (on average 105.75) internal successors, (5076), 48 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:29,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:59:29,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 321 [2022-11-25 16:59:29,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:59:41,726 INFO L130 PetriNetUnfolder]: 3584/6680 cut-off events. [2022-11-25 16:59:41,726 INFO L131 PetriNetUnfolder]: For 16953/16953 co-relation queries the response was YES. [2022-11-25 16:59:41,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24776 conditions, 6680 events. 3584/6680 cut-off events. For 16953/16953 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 37989 event pairs, 534 based on Foata normal form. 54/6697 useless extension candidates. Maximal degree in co-relation 20420. Up to 1562 conditions per place. [2022-11-25 16:59:41,774 INFO L137 encePairwiseOnDemand]: 298/321 looper letters, 281 selfloop transitions, 299 changer transitions 15/595 dead transitions. [2022-11-25 16:59:41,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 595 transitions, 5237 flow [2022-11-25 16:59:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-25 16:59:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-25 16:59:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 7680 transitions. [2022-11-25 16:59:41,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3417890520694259 [2022-11-25 16:59:41,797 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 7680 transitions. [2022-11-25 16:59:41,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 7680 transitions. [2022-11-25 16:59:41,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:59:41,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 7680 transitions. [2022-11-25 16:59:41,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 109.71428571428571) internal successors, (7680), 70 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:41,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 321.0) internal successors, (22791), 71 states have internal predecessors, (22791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:41,862 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 321.0) internal successors, (22791), 71 states have internal predecessors, (22791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:41,862 INFO L175 Difference]: Start difference. First operand has 135 places, 191 transitions, 1927 flow. Second operand 70 states and 7680 transitions. [2022-11-25 16:59:41,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 595 transitions, 5237 flow [2022-11-25 16:59:41,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 595 transitions, 5016 flow, removed 60 selfloop flow, removed 6 redundant places. [2022-11-25 16:59:41,992 INFO L231 Difference]: Finished difference. Result has 216 places, 345 transitions, 3978 flow [2022-11-25 16:59:41,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=3978, PETRI_PLACES=216, PETRI_TRANSITIONS=345} [2022-11-25 16:59:41,993 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 182 predicate places. [2022-11-25 16:59:41,993 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 345 transitions, 3978 flow [2022-11-25 16:59:41,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 105.75) internal successors, (5076), 48 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:41,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:59:41,995 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:42,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:42,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 16:59:42,201 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 16:59:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:42,202 INFO L85 PathProgramCache]: Analyzing trace with hash 200563527, now seen corresponding path program 1 times [2022-11-25 16:59:42,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:42,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843565235] [2022-11-25 16:59:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:44,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843565235] [2022-11-25 16:59:44,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843565235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658463070] [2022-11-25 16:59:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:44,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:44,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:44,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:44,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:59:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:44,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-25 16:59:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:44,623 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 19 treesize of output 15 [2022-11-25 16:59:45,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:59:45,102 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 69 treesize of output 41 [2022-11-25 16:59:45,913 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 108 treesize of output 44 [2022-11-25 16:59:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:46,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:47,265 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 54 treesize of output 46 [2022-11-25 16:59:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:59:47,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658463070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:59:47,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:59:47,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 60 [2022-11-25 16:59:47,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702324590] [2022-11-25 16:59:47,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:47,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-25 16:59:47,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:47,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-25 16:59:47,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3444, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 17:00:00,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 321 [2022-11-25 17:00:00,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 345 transitions, 3978 flow. Second operand has 61 states, 61 states have (on average 125.77049180327869) internal successors, (7672), 61 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:00:00,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:00:00,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 321 [2022-11-25 17:00:00,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:18,502 INFO L130 PetriNetUnfolder]: 9446/17619 cut-off events. [2022-11-25 17:01:18,502 INFO L131 PetriNetUnfolder]: For 189387/189387 co-relation queries the response was YES. [2022-11-25 17:01:18,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111090 conditions, 17619 events. 9446/17619 cut-off events. For 189387/189387 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 123324 event pairs, 1284 based on Foata normal form. 44/17586 useless extension candidates. Maximal degree in co-relation 92578. Up to 6688 conditions per place. [2022-11-25 17:01:18,733 INFO L137 encePairwiseOnDemand]: 302/321 looper letters, 913 selfloop transitions, 861 changer transitions 146/1920 dead transitions. [2022-11-25 17:01:18,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1920 transitions, 24433 flow [2022-11-25 17:01:18,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-11-25 17:01:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2022-11-25 17:01:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 31381 transitions. [2022-11-25 17:01:19,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4023050395497609 [2022-11-25 17:01:19,076 INFO L72 ComplementDD]: Start complementDD. Operand 243 states and 31381 transitions. [2022-11-25 17:01:19,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 243 states and 31381 transitions. [2022-11-25 17:01:19,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:01:19,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 243 states and 31381 transitions. [2022-11-25 17:01:19,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 244 states, 243 states have (on average 129.13991769547326) internal successors, (31381), 243 states have internal predecessors, (31381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:19,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 244 states, 244 states have (on average 321.0) internal successors, (78324), 244 states have internal predecessors, (78324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:19,254 INFO L81 ComplementDD]: Finished complementDD. Result has 244 states, 244 states have (on average 321.0) internal successors, (78324), 244 states have internal predecessors, (78324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:19,254 INFO L175 Difference]: Start difference. First operand has 216 places, 345 transitions, 3978 flow. Second operand 243 states and 31381 transitions. [2022-11-25 17:01:19,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1920 transitions, 24433 flow [2022-11-25 17:01:19,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1920 transitions, 23141 flow, removed 437 selfloop flow, removed 12 redundant places. [2022-11-25 17:01:20,114 INFO L231 Difference]: Finished difference. Result has 464 places, 974 transitions, 12649 flow [2022-11-25 17:01:20,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=243, PETRI_FLOW=12649, PETRI_PLACES=464, PETRI_TRANSITIONS=974} [2022-11-25 17:01:20,115 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 430 predicate places. [2022-11-25 17:01:20,115 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 974 transitions, 12649 flow [2022-11-25 17:01:20,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 125.77049180327869) internal successors, (7672), 61 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:20,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:01:20,117 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:20,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:20,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:20,324 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:01:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:20,325 INFO L85 PathProgramCache]: Analyzing trace with hash 247371285, now seen corresponding path program 2 times [2022-11-25 17:01:20,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:20,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793220632] [2022-11-25 17:01:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:20,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:01:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:22,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:22,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793220632] [2022-11-25 17:01:22,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793220632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:22,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765259216] [2022-11-25 17:01:22,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:01:22,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:22,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:22,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:22,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:01:22,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:01:22,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:22,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-25 17:01:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:22,248 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-25 17:01:22,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-25 17:01:22,561 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 19 treesize of output 15 [2022-11-25 17:01:22,654 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 56 treesize of output 52 [2022-11-25 17:01:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:23,177 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 49 treesize of output 36 [2022-11-25 17:01:24,093 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 76 treesize of output 44 [2022-11-25 17:01:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:24,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:25,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:25,549 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-25 17:01:25,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:25,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-25 17:01:25,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 22 [2022-11-25 17:01:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:01:25,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765259216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:25,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:01:25,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 58 [2022-11-25 17:01:25,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286239192] [2022-11-25 17:01:25,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:25,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-25 17:01:25,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:25,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-25 17:01:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3256, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 17:01:30,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 321 [2022-11-25 17:01:30,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 974 transitions, 12649 flow. Second operand has 60 states, 60 states have (on average 112.8) internal successors, (6768), 60 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:01:30,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:01:30,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 321 [2022-11-25 17:01:30,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:01:56,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:01:58,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:02:03,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:02:29,512 INFO L130 PetriNetUnfolder]: 18655/34911 cut-off events. [2022-11-25 17:02:29,512 INFO L131 PetriNetUnfolder]: For 410074/410074 co-relation queries the response was YES. [2022-11-25 17:02:29,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227100 conditions, 34911 events. 18655/34911 cut-off events. For 410074/410074 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 274774 event pairs, 3878 based on Foata normal form. 206/34936 useless extension candidates. Maximal degree in co-relation 226936. Up to 12703 conditions per place. [2022-11-25 17:02:30,179 INFO L137 encePairwiseOnDemand]: 297/321 looper letters, 1362 selfloop transitions, 1142 changer transitions 94/2598 dead transitions. [2022-11-25 17:02:30,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 2598 transitions, 36652 flow [2022-11-25 17:02:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-11-25 17:02:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2022-11-25 17:02:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 15893 transitions. [2022-11-25 17:02:30,208 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36405076049111235 [2022-11-25 17:02:30,209 INFO L72 ComplementDD]: Start complementDD. Operand 136 states and 15893 transitions. [2022-11-25 17:02:30,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 136 states and 15893 transitions. [2022-11-25 17:02:30,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:02:30,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 136 states and 15893 transitions. [2022-11-25 17:02:30,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 137 states, 136 states have (on average 116.86029411764706) internal successors, (15893), 136 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:30,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 137 states, 137 states have (on average 321.0) internal successors, (43977), 137 states have internal predecessors, (43977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:30,290 INFO L81 ComplementDD]: Finished complementDD. Result has 137 states, 137 states have (on average 321.0) internal successors, (43977), 137 states have internal predecessors, (43977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:30,290 INFO L175 Difference]: Start difference. First operand has 464 places, 974 transitions, 12649 flow. Second operand 136 states and 15893 transitions. [2022-11-25 17:02:30,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 2598 transitions, 36652 flow [2022-11-25 17:02:32,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 2598 transitions, 33350 flow, removed 719 selfloop flow, removed 31 redundant places. [2022-11-25 17:02:32,509 INFO L231 Difference]: Finished difference. Result has 600 places, 1821 transitions, 25996 flow [2022-11-25 17:02:32,509 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=10208, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=136, PETRI_FLOW=25996, PETRI_PLACES=600, PETRI_TRANSITIONS=1821} [2022-11-25 17:02:32,510 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 566 predicate places. [2022-11-25 17:02:32,510 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 1821 transitions, 25996 flow [2022-11-25 17:02:32,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 112.8) internal successors, (6768), 60 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:32,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:02:32,511 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:02:32,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:02:32,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:02:32,712 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:02:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:02:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash 284266995, now seen corresponding path program 3 times [2022-11-25 17:02:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:02:32,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762921121] [2022-11-25 17:02:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:02:32,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:02:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:02:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:34,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:02:34,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762921121] [2022-11-25 17:02:34,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762921121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:02:34,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987990703] [2022-11-25 17:02:34,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:02:34,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:02:34,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:02:34,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:02:34,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:02:35,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:02:35,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:02:35,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-25 17:02:35,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:02:35,062 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-25 17:02:35,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 17:02:35,434 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 19 treesize of output 15 [2022-11-25 17:02:36,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:02:36,081 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 69 treesize of output 41 [2022-11-25 17:02:36,239 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 60 treesize of output 56 [2022-11-25 17:02:37,480 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 108 treesize of output 44 [2022-11-25 17:02:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:02:37,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:02:38,595 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_569 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_569) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294))) is different from false [2022-11-25 17:02:38,606 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_569 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_569) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296)))) is different from false [2022-11-25 17:02:38,618 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_569 (Array Int Int)) (v_ArrVal_567 Int)) (not (= (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base|) (+ (* |c_t1Thread1of1ForFork1_push_#t~ret34#1| 4) |c_t1Thread1of1ForFork1_push_~stack#1.offset|) v_ArrVal_567)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_569) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-25 17:02:40,490 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-25 17:02:40,490 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2022-11-25 17:02:40,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:02:40,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2022-11-25 17:02:40,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 22 [2022-11-25 17:02:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-25 17:02:45,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987990703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:02:45,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:02:45,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 66 [2022-11-25 17:02:45,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880262896] [2022-11-25 17:02:45,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:02:45,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-25 17:02:45,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:02:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-25 17:02:45,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3897, Unknown=17, NotChecked=384, Total=4556 [2022-11-25 17:02:45,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 321 [2022-11-25 17:02:45,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1821 transitions, 25996 flow. Second operand has 68 states, 68 states have (on average 105.58823529411765) internal successors, (7180), 68 states have internal predecessors, (7180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:02:45,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:02:45,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 321 [2022-11-25 17:02:45,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:03:55,474 INFO L130 PetriNetUnfolder]: 27455/51499 cut-off events. [2022-11-25 17:03:55,474 INFO L131 PetriNetUnfolder]: For 761751/761751 co-relation queries the response was YES. [2022-11-25 17:03:56,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373473 conditions, 51499 events. 27455/51499 cut-off events. For 761751/761751 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 413939 event pairs, 4241 based on Foata normal form. 6/51220 useless extension candidates. Maximal degree in co-relation 360977. Up to 18528 conditions per place. [2022-11-25 17:03:56,566 INFO L137 encePairwiseOnDemand]: 301/321 looper letters, 557 selfloop transitions, 2549 changer transitions 4/3110 dead transitions. [2022-11-25 17:03:56,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 3110 transitions, 50668 flow [2022-11-25 17:03:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-25 17:03:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-11-25 17:03:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 8953 transitions. [2022-11-25 17:03:56,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34013372844008816 [2022-11-25 17:03:56,579 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 8953 transitions. [2022-11-25 17:03:56,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 8953 transitions. [2022-11-25 17:03:56,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:03:56,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 8953 transitions. [2022-11-25 17:03:56,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 109.1829268292683) internal successors, (8953), 82 states have internal predecessors, (8953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:56,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 321.0) internal successors, (26643), 83 states have internal predecessors, (26643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:56,618 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 321.0) internal successors, (26643), 83 states have internal predecessors, (26643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:03:56,619 INFO L175 Difference]: Start difference. First operand has 600 places, 1821 transitions, 25996 flow. Second operand 82 states and 8953 transitions. [2022-11-25 17:03:56,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 3110 transitions, 50668 flow [2022-11-25 17:04:03,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 3110 transitions, 49719 flow, removed 418 selfloop flow, removed 6 redundant places. [2022-11-25 17:04:04,050 INFO L231 Difference]: Finished difference. Result has 690 places, 2786 transitions, 46625 flow [2022-11-25 17:04:04,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=25313, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=46625, PETRI_PLACES=690, PETRI_TRANSITIONS=2786} [2022-11-25 17:04:04,052 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 656 predicate places. [2022-11-25 17:04:04,052 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 2786 transitions, 46625 flow [2022-11-25 17:04:04,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 105.58823529411765) internal successors, (7180), 68 states have internal predecessors, (7180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:04,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:04:04,053 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:04,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:04,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:04:04,259 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 17:04:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:04,260 INFO L85 PathProgramCache]: Analyzing trace with hash -726264189, now seen corresponding path program 2 times [2022-11-25 17:04:04,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:04,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253935686] [2022-11-25 17:04:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:04,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:04:04,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:04,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253935686] [2022-11-25 17:04:04,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253935686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:04,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208062969] [2022-11-25 17:04:04,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:04:04,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:04,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:04,584 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:04,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ad2c98-648b-4ebb-845d-47131362489e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:04:04,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:04:04,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:04:04,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:04:04,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:04:04,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:04:05,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208062969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:05,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:05,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-11-25 17:04:05,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053513460] [2022-11-25 17:04:05,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:05,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:04:05,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:05,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:04:05,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:04:05,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 321 [2022-11-25 17:04:05,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 2786 transitions, 46625 flow. Second operand has 22 states, 22 states have (on average 145.04545454545453) internal successors, (3191), 22 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:04:05,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:04:05,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 321 [2022-11-25 17:04:05,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand