./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa --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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:33:44,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:33:44,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:33:44,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:33:44,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:33:44,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:33:44,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:33:44,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:33:44,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:33:44,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:33:44,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:33:44,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:33:44,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:33:44,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:33:44,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:33:44,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:33:44,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:33:44,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:33:44,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:33:44,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:33:44,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:33:44,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:33:44,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:33:44,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:33:44,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:33:44,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:33:44,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:33:44,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:33:44,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:33:44,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:33:44,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:33:44,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:33:44,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:33:44,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:33:44,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:33:44,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:33:44,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:33:44,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:33:44,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:33:44,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:33:44,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:33:44,454 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:33:44,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:33:44,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:33:44,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:33:44,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:33:44,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:33:44,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:33:44,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:33:44,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:33:44,473 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:33:44,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:33:44,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:33:44,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:33:44,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:33:44,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:33:44,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:33:44,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:33:44,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:33:44,474 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:33:44,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:33:44,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:33:44,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:33:44,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:33:44,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:33:44,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:33:44,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:33:44,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:33:44,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:33:44,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:33:44,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:33:44,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:33:44,476 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:33:44,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:33:44,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:33:44,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:33:44,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2021-12-06 22:33:44,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:33:44,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:33:44,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:33:44,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:33:44,684 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:33:44,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2021-12-06 22:33:44,725 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/data/5dbffbb3c/87699d8814af478fa175f523779da0cc/FLAG6112a65c6 [2021-12-06 22:33:45,105 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:33:45,106 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2021-12-06 22:33:45,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/data/5dbffbb3c/87699d8814af478fa175f523779da0cc/FLAG6112a65c6 [2021-12-06 22:33:45,123 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/data/5dbffbb3c/87699d8814af478fa175f523779da0cc [2021-12-06 22:33:45,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:33:45,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:33:45,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:33:45,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:33:45,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:33:45,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ef88a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45, skipping insertion in model container [2021-12-06 22:33:45,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:33:45,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:33:45,292 WARN L230 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_8fc483c9-25b3-416e-b7aa-2e4fba81048b/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2021-12-06 22:33:45,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:33:45,304 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:33:45,326 WARN L230 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_8fc483c9-25b3-416e-b7aa-2e4fba81048b/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2021-12-06 22:33:45,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:33:45,339 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:33:45,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45 WrapperNode [2021-12-06 22:33:45,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:33:45,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:33:45,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:33:45,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:33:45,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,387 INFO L137 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 336 [2021-12-06 22:33:45,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:33:45,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:33:45,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:33:45,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:33:45,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:33:45,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:33:45,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:33:45,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:33:45,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (1/1) ... [2021-12-06 22:33:45,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:33:45,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:33:45,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:33:45,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:33:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:33:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:33:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:33:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:33:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 22:33:45,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 22:33:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 22:33:45,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 22:33:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-06 22:33:45,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-06 22:33:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:33:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 22:33:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 22:33:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:33:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:33:45,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:33:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:33:45,487 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 22:33:45,561 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:33:45,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:33:45,857 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:33:45,946 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:33:45,946 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-06 22:33:45,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:33:45 BoogieIcfgContainer [2021-12-06 22:33:45,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:33:45,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:33:45,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:33:45,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:33:45,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:33:45" (1/3) ... [2021-12-06 22:33:45,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348da87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:33:45, skipping insertion in model container [2021-12-06 22:33:45,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:33:45" (2/3) ... [2021-12-06 22:33:45,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348da87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:33:45, skipping insertion in model container [2021-12-06 22:33:45,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:33:45" (3/3) ... [2021-12-06 22:33:45,961 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2021-12-06 22:33:45,965 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 22:33:45,965 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:33:45,966 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:33:45,966 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 22:33:45,991 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,992 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,992 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,992 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,992 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,992 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,992 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,992 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,993 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,993 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,993 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,993 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,993 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,993 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,993 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,993 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,994 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,994 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,994 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,994 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,994 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,994 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,994 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,994 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,995 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,995 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,995 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,995 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,995 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,995 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,995 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,995 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,996 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,996 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,996 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,996 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,996 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,996 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,996 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,996 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,997 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,997 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,997 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,997 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:45,999 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,001 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,001 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,001 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,001 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,001 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,001 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,002 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,002 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,002 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,002 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,002 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,002 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,002 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,002 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,006 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,006 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,007 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,007 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,007 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,007 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,007 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,007 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,007 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,008 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,010 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,011 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:33:46,012 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-06 22:33:46,048 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:33:46,053 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:33:46,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-06 22:33:46,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 256 places, 273 transitions, 570 flow [2021-12-06 22:33:46,128 INFO L129 PetriNetUnfolder]: 27/270 cut-off events. [2021-12-06 22:33:46,128 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-06 22:33:46,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 270 events. 27/270 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 229. Up to 6 conditions per place. [2021-12-06 22:33:46,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 273 transitions, 570 flow [2021-12-06 22:33:46,141 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 259 transitions, 536 flow [2021-12-06 22:33:46,184 INFO L129 PetriNetUnfolder]: 27/258 cut-off events. [2021-12-06 22:33:46,184 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-06 22:33:46,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:46,185 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:46,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1083007965, now seen corresponding path program 1 times [2021-12-06 22:33:46,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:46,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378256342] [2021-12-06 22:33:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:46,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:46,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:46,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378256342] [2021-12-06 22:33:46,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378256342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:46,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:46,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:33:46,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170742823] [2021-12-06 22:33:46,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:46,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:33:46,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:46,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:33:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:33:46,463 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 273 [2021-12-06 22:33:46,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 259 transitions, 536 flow. Second operand has 2 states, 2 states have (on average 250.0) internal successors, (500), 2 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) [2021-12-06 22:33:46,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:46,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 273 [2021-12-06 22:33:46,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:46,523 INFO L129 PetriNetUnfolder]: 30/262 cut-off events. [2021-12-06 22:33:46,523 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-12-06 22:33:46,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 262 events. 30/262 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 175 event pairs, 0 based on Foata normal form. 19/259 useless extension candidates. Maximal degree in co-relation 234. Up to 31 conditions per place. [2021-12-06 22:33:46,527 INFO L132 encePairwiseOnDemand]: 260/273 looper letters, 14 selfloop transitions, 0 changer transitions 7/246 dead transitions. [2021-12-06 22:33:46,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 246 transitions, 538 flow [2021-12-06 22:33:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:33:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 22:33:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 517 transitions. [2021-12-06 22:33:46,538 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9468864468864469 [2021-12-06 22:33:46,539 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 517 transitions. [2021-12-06 22:33:46,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 517 transitions. [2021-12-06 22:33:46,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:46,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 517 transitions. [2021-12-06 22:33:46,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 258.5) internal successors, (517), 2 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:46,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:46,557 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:46,559 INFO L186 Difference]: Start difference. First operand has 242 places, 259 transitions, 536 flow. Second operand 2 states and 517 transitions. [2021-12-06 22:33:46,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 246 transitions, 538 flow [2021-12-06 22:33:46,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 246 transitions, 526 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-06 22:33:46,572 INFO L242 Difference]: Finished difference. Result has 237 places, 239 transitions, 484 flow [2021-12-06 22:33:46,574 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=484, PETRI_PLACES=237, PETRI_TRANSITIONS=239} [2021-12-06 22:33:46,577 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -5 predicate places. [2021-12-06 22:33:46,578 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 239 transitions, 484 flow [2021-12-06 22:33:46,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 250.0) internal successors, (500), 2 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) [2021-12-06 22:33:46,578 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:46,579 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:46,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:33:46,579 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:46,580 INFO L85 PathProgramCache]: Analyzing trace with hash -742529873, now seen corresponding path program 1 times [2021-12-06 22:33:46,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:46,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531612838] [2021-12-06 22:33:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:46,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:46,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531612838] [2021-12-06 22:33:46,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531612838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:46,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:46,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:33:46,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320079815] [2021-12-06 22:33:46,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:46,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:33:46,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:33:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:33:46,823 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 273 [2021-12-06 22:33:46,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 239 transitions, 484 flow. Second operand has 5 states, 5 states have (on average 215.2) internal successors, (1076), 5 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:46,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:46,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 273 [2021-12-06 22:33:46,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:46,956 INFO L129 PetriNetUnfolder]: 56/335 cut-off events. [2021-12-06 22:33:46,956 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-06 22:33:46,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 335 events. 56/335 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 457 event pairs, 0 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 432. Up to 47 conditions per place. [2021-12-06 22:33:46,959 INFO L132 encePairwiseOnDemand]: 265/273 looper letters, 51 selfloop transitions, 5 changer transitions 4/255 dead transitions. [2021-12-06 22:33:46,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 255 transitions, 641 flow [2021-12-06 22:33:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:33:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 22:33:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1101 transitions. [2021-12-06 22:33:46,964 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8065934065934066 [2021-12-06 22:33:46,964 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1101 transitions. [2021-12-06 22:33:46,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1101 transitions. [2021-12-06 22:33:46,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:46,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1101 transitions. [2021-12-06 22:33:46,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.2) internal successors, (1101), 5 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:46,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:46,974 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:46,974 INFO L186 Difference]: Start difference. First operand has 237 places, 239 transitions, 484 flow. Second operand 5 states and 1101 transitions. [2021-12-06 22:33:46,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 255 transitions, 641 flow [2021-12-06 22:33:46,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 255 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 22:33:46,980 INFO L242 Difference]: Finished difference. Result has 237 places, 243 transitions, 521 flow [2021-12-06 22:33:46,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=237, PETRI_TRANSITIONS=243} [2021-12-06 22:33:46,981 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -5 predicate places. [2021-12-06 22:33:46,981 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 243 transitions, 521 flow [2021-12-06 22:33:46,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.2) internal successors, (1076), 5 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:46,982 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:46,982 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:46,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:33:46,983 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1856785592, now seen corresponding path program 1 times [2021-12-06 22:33:46,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:46,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744261929] [2021-12-06 22:33:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:46,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:47,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744261929] [2021-12-06 22:33:47,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744261929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:47,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:47,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:33:47,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050393527] [2021-12-06 22:33:47,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:47,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:33:47,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:47,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:33:47,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:33:47,171 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 273 [2021-12-06 22:33:47,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 243 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:47,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 273 [2021-12-06 22:33:47,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:47,279 INFO L129 PetriNetUnfolder]: 86/433 cut-off events. [2021-12-06 22:33:47,280 INFO L130 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2021-12-06 22:33:47,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 433 events. 86/433 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 912 event pairs, 2 based on Foata normal form. 10/395 useless extension candidates. Maximal degree in co-relation 593. Up to 64 conditions per place. [2021-12-06 22:33:47,284 INFO L132 encePairwiseOnDemand]: 264/273 looper letters, 30 selfloop transitions, 7 changer transitions 0/255 dead transitions. [2021-12-06 22:33:47,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 255 transitions, 633 flow [2021-12-06 22:33:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:33:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:33:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2021-12-06 22:33:47,287 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9120879120879121 [2021-12-06 22:33:47,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2021-12-06 22:33:47,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2021-12-06 22:33:47,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:47,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2021-12-06 22:33:47,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,295 INFO L186 Difference]: Start difference. First operand has 237 places, 243 transitions, 521 flow. Second operand 3 states and 747 transitions. [2021-12-06 22:33:47,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 255 transitions, 633 flow [2021-12-06 22:33:47,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 255 transitions, 622 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-06 22:33:47,303 INFO L242 Difference]: Finished difference. Result has 235 places, 245 transitions, 549 flow [2021-12-06 22:33:47,304 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=549, PETRI_PLACES=235, PETRI_TRANSITIONS=245} [2021-12-06 22:33:47,305 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -7 predicate places. [2021-12-06 22:33:47,305 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 245 transitions, 549 flow [2021-12-06 22:33:47,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,306 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:47,306 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:47,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:33:47,307 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:47,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash -472069804, now seen corresponding path program 1 times [2021-12-06 22:33:47,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:47,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557044542] [2021-12-06 22:33:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:47,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:47,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:47,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557044542] [2021-12-06 22:33:47,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557044542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:47,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:47,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:33:47,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827786689] [2021-12-06 22:33:47,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:47,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:33:47,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:33:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:33:47,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 273 [2021-12-06 22:33:47,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 245 transitions, 549 flow. Second operand has 4 states, 4 states have (on average 241.5) internal successors, (966), 4 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:47,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 273 [2021-12-06 22:33:47,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:47,587 INFO L129 PetriNetUnfolder]: 149/652 cut-off events. [2021-12-06 22:33:47,587 INFO L130 PetriNetUnfolder]: For 151/155 co-relation queries the response was YES. [2021-12-06 22:33:47,592 INFO L84 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 652 events. 149/652 cut-off events. For 151/155 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2233 event pairs, 6 based on Foata normal form. 11/576 useless extension candidates. Maximal degree in co-relation 986. Up to 102 conditions per place. [2021-12-06 22:33:47,598 INFO L132 encePairwiseOnDemand]: 266/273 looper letters, 38 selfloop transitions, 6 changer transitions 0/262 dead transitions. [2021-12-06 22:33:47,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 262 transitions, 706 flow [2021-12-06 22:33:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:33:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 22:33:47,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 986 transitions. [2021-12-06 22:33:47,602 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9029304029304029 [2021-12-06 22:33:47,602 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 986 transitions. [2021-12-06 22:33:47,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 986 transitions. [2021-12-06 22:33:47,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:47,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 986 transitions. [2021-12-06 22:33:47,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 246.5) internal successors, (986), 4 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,611 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,611 INFO L186 Difference]: Start difference. First operand has 235 places, 245 transitions, 549 flow. Second operand 4 states and 986 transitions. [2021-12-06 22:33:47,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 262 transitions, 706 flow [2021-12-06 22:33:47,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 262 transitions, 697 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-06 22:33:47,619 INFO L242 Difference]: Finished difference. Result has 238 places, 246 transitions, 564 flow [2021-12-06 22:33:47,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=564, PETRI_PLACES=238, PETRI_TRANSITIONS=246} [2021-12-06 22:33:47,621 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -4 predicate places. [2021-12-06 22:33:47,621 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 246 transitions, 564 flow [2021-12-06 22:33:47,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 241.5) internal successors, (966), 4 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,622 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:47,622 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:47,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:33:47,622 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash -640136691, now seen corresponding path program 1 times [2021-12-06 22:33:47,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:47,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325730813] [2021-12-06 22:33:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:47,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:47,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:47,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325730813] [2021-12-06 22:33:47,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325730813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:47,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:47,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:33:47,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611997951] [2021-12-06 22:33:47,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:47,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:33:47,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:47,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:33:47,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:33:47,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 273 [2021-12-06 22:33:47,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 246 transitions, 564 flow. Second operand has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:47,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 273 [2021-12-06 22:33:47,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:47,872 INFO L129 PetriNetUnfolder]: 315/1025 cut-off events. [2021-12-06 22:33:47,872 INFO L130 PetriNetUnfolder]: For 371/383 co-relation queries the response was YES. [2021-12-06 22:33:47,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 1025 events. 315/1025 cut-off events. For 371/383 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4772 event pairs, 42 based on Foata normal form. 3/862 useless extension candidates. Maximal degree in co-relation 1739. Up to 216 conditions per place. [2021-12-06 22:33:47,884 INFO L132 encePairwiseOnDemand]: 268/273 looper letters, 34 selfloop transitions, 6 changer transitions 0/260 dead transitions. [2021-12-06 22:33:47,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 260 transitions, 706 flow [2021-12-06 22:33:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:33:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:33:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2021-12-06 22:33:47,886 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9157509157509157 [2021-12-06 22:33:47,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2021-12-06 22:33:47,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2021-12-06 22:33:47,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:47,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2021-12-06 22:33:47,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,891 INFO L186 Difference]: Start difference. First operand has 238 places, 246 transitions, 564 flow. Second operand 3 states and 750 transitions. [2021-12-06 22:33:47,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 260 transitions, 706 flow [2021-12-06 22:33:47,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 260 transitions, 695 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 22:33:47,897 INFO L242 Difference]: Finished difference. Result has 240 places, 247 transitions, 584 flow [2021-12-06 22:33:47,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=584, PETRI_PLACES=240, PETRI_TRANSITIONS=247} [2021-12-06 22:33:47,898 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -2 predicate places. [2021-12-06 22:33:47,898 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 247 transitions, 584 flow [2021-12-06 22:33:47,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,899 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:47,899 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:47,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:33:47,899 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash 841652493, now seen corresponding path program 1 times [2021-12-06 22:33:47,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:47,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280896097] [2021-12-06 22:33:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:47,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:47,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:47,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280896097] [2021-12-06 22:33:47,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280896097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:47,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:47,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:33:47,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776446387] [2021-12-06 22:33:47,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:47,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:33:47,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:33:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:33:47,984 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 273 [2021-12-06 22:33:47,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 247 transitions, 584 flow. Second operand has 6 states, 6 states have (on average 212.66666666666666) internal successors, (1276), 6 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:47,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:47,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 273 [2021-12-06 22:33:47,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:48,223 INFO L129 PetriNetUnfolder]: 201/1035 cut-off events. [2021-12-06 22:33:48,223 INFO L130 PetriNetUnfolder]: For 517/559 co-relation queries the response was YES. [2021-12-06 22:33:48,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1671 conditions, 1035 events. 201/1035 cut-off events. For 517/559 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4559 event pairs, 25 based on Foata normal form. 18/909 useless extension candidates. Maximal degree in co-relation 1663. Up to 222 conditions per place. [2021-12-06 22:33:48,233 INFO L132 encePairwiseOnDemand]: 262/273 looper letters, 88 selfloop transitions, 11 changer transitions 0/287 dead transitions. [2021-12-06 22:33:48,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 287 transitions, 880 flow [2021-12-06 22:33:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:33:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 22:33:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1955 transitions. [2021-12-06 22:33:48,238 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7956857956857957 [2021-12-06 22:33:48,238 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1955 transitions. [2021-12-06 22:33:48,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1955 transitions. [2021-12-06 22:33:48,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:48,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1955 transitions. [2021-12-06 22:33:48,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.22222222222223) internal successors, (1955), 9 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:48,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:48,249 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:48,249 INFO L186 Difference]: Start difference. First operand has 240 places, 247 transitions, 584 flow. Second operand 9 states and 1955 transitions. [2021-12-06 22:33:48,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 287 transitions, 880 flow [2021-12-06 22:33:48,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 287 transitions, 868 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 22:33:48,256 INFO L242 Difference]: Finished difference. Result has 248 places, 251 transitions, 616 flow [2021-12-06 22:33:48,256 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=616, PETRI_PLACES=248, PETRI_TRANSITIONS=251} [2021-12-06 22:33:48,257 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 6 predicate places. [2021-12-06 22:33:48,257 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 251 transitions, 616 flow [2021-12-06 22:33:48,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 212.66666666666666) internal successors, (1276), 6 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:48,258 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:48,258 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:48,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:33:48,259 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:48,259 INFO L85 PathProgramCache]: Analyzing trace with hash 194028026, now seen corresponding path program 1 times [2021-12-06 22:33:48,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:48,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30844073] [2021-12-06 22:33:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:48,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:33:48,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:48,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30844073] [2021-12-06 22:33:48,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30844073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:48,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:48,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:33:48,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352943262] [2021-12-06 22:33:48,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:48,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:33:48,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:48,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:33:48,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:33:48,313 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 273 [2021-12-06 22:33:48,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 251 transitions, 616 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:48,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:48,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 273 [2021-12-06 22:33:48,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:48,465 INFO L129 PetriNetUnfolder]: 265/981 cut-off events. [2021-12-06 22:33:48,465 INFO L130 PetriNetUnfolder]: For 504/567 co-relation queries the response was YES. [2021-12-06 22:33:48,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1789 conditions, 981 events. 265/981 cut-off events. For 504/567 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3521 event pairs, 19 based on Foata normal form. 2/891 useless extension candidates. Maximal degree in co-relation 1779. Up to 213 conditions per place. [2021-12-06 22:33:48,474 INFO L132 encePairwiseOnDemand]: 268/273 looper letters, 32 selfloop transitions, 5 changer transitions 3/258 dead transitions. [2021-12-06 22:33:48,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 258 transitions, 714 flow [2021-12-06 22:33:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:33:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:33:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 741 transitions. [2021-12-06 22:33:48,476 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-12-06 22:33:48,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 741 transitions. [2021-12-06 22:33:48,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 741 transitions. [2021-12-06 22:33:48,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:48,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 741 transitions. [2021-12-06 22:33:48,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:48,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:48,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:48,481 INFO L186 Difference]: Start difference. First operand has 248 places, 251 transitions, 616 flow. Second operand 3 states and 741 transitions. [2021-12-06 22:33:48,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 258 transitions, 714 flow [2021-12-06 22:33:48,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 258 transitions, 705 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-06 22:33:48,487 INFO L242 Difference]: Finished difference. Result has 249 places, 247 transitions, 608 flow [2021-12-06 22:33:48,487 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=608, PETRI_PLACES=249, PETRI_TRANSITIONS=247} [2021-12-06 22:33:48,488 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 7 predicate places. [2021-12-06 22:33:48,488 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 247 transitions, 608 flow [2021-12-06 22:33:48,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:48,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:48,489 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:48,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:33:48,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1360050348, now seen corresponding path program 1 times [2021-12-06 22:33:48,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:48,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401100163] [2021-12-06 22:33:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:48,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:48,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:48,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401100163] [2021-12-06 22:33:48,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401100163] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:33:48,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563789031] [2021-12-06 22:33:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:48,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:33:48,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:33:48,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:33:48,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:33:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:49,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 22:33:49,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:33:49,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 11 [2021-12-06 22:33:50,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2021-12-06 22:33:50,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2021-12-06 22:33:50,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2021-12-06 22:33:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:50,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:33:52,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:33:52,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 61 treesize of output 50 [2021-12-06 22:33:52,186 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:33:52,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 398 treesize of output 373 [2021-12-06 22:33:52,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:33:52,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 135 [2021-12-06 22:33:52,203 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 22:33:52,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 318 treesize of output 222 [2021-12-06 22:33:52,211 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 22:33:52,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 198 [2021-12-06 22:33:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:52,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563789031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:33:52,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:33:52,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 20] total 54 [2021-12-06 22:33:52,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042342434] [2021-12-06 22:33:52,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:33:52,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 22:33:52,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 22:33:52,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=2336, Unknown=64, NotChecked=0, Total=2862 [2021-12-06 22:33:52,760 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 273 [2021-12-06 22:33:52,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 247 transitions, 608 flow. Second operand has 54 states, 54 states have (on average 134.96296296296296) internal successors, (7288), 54 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:52,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:52,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 273 [2021-12-06 22:33:52,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:55,222 INFO L129 PetriNetUnfolder]: 927/3222 cut-off events. [2021-12-06 22:33:55,222 INFO L130 PetriNetUnfolder]: For 2190/2435 co-relation queries the response was YES. [2021-12-06 22:33:55,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6539 conditions, 3222 events. 927/3222 cut-off events. For 2190/2435 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 23028 event pairs, 9 based on Foata normal form. 18/2854 useless extension candidates. Maximal degree in co-relation 6528. Up to 629 conditions per place. [2021-12-06 22:33:55,263 INFO L132 encePairwiseOnDemand]: 228/273 looper letters, 288 selfloop transitions, 81 changer transitions 11/505 dead transitions. [2021-12-06 22:33:55,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 505 transitions, 2191 flow [2021-12-06 22:33:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 22:33:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-06 22:33:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 6218 transitions. [2021-12-06 22:33:55,298 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5061457061457062 [2021-12-06 22:33:55,298 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 6218 transitions. [2021-12-06 22:33:55,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 6218 transitions. [2021-12-06 22:33:55,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:55,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 6218 transitions. [2021-12-06 22:33:55,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 138.17777777777778) internal successors, (6218), 45 states have internal predecessors, (6218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:55,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 273.0) internal successors, (12558), 46 states have internal predecessors, (12558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:55,335 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 273.0) internal successors, (12558), 46 states have internal predecessors, (12558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:55,336 INFO L186 Difference]: Start difference. First operand has 249 places, 247 transitions, 608 flow. Second operand 45 states and 6218 transitions. [2021-12-06 22:33:55,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 505 transitions, 2191 flow [2021-12-06 22:33:55,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 505 transitions, 2141 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 22:33:55,346 INFO L242 Difference]: Finished difference. Result has 305 places, 319 transitions, 1271 flow [2021-12-06 22:33:55,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1271, PETRI_PLACES=305, PETRI_TRANSITIONS=319} [2021-12-06 22:33:55,347 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 63 predicate places. [2021-12-06 22:33:55,347 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 319 transitions, 1271 flow [2021-12-06 22:33:55,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 134.96296296296296) internal successors, (7288), 54 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:55,349 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:55,349 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:55,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:33:55,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 22:33:55,551 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1544081966, now seen corresponding path program 1 times [2021-12-06 22:33:55,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981103633] [2021-12-06 22:33:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:55,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:33:55,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981103633] [2021-12-06 22:33:55,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981103633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:55,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:55,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:33:55,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707980896] [2021-12-06 22:33:55,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:55,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:33:55,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:33:55,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:33:55,712 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 273 [2021-12-06 22:33:55,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 319 transitions, 1271 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:55,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:55,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 273 [2021-12-06 22:33:55,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:56,329 INFO L129 PetriNetUnfolder]: 1076/3795 cut-off events. [2021-12-06 22:33:56,329 INFO L130 PetriNetUnfolder]: For 7833/8350 co-relation queries the response was YES. [2021-12-06 22:33:56,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9368 conditions, 3795 events. 1076/3795 cut-off events. For 7833/8350 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 30220 event pairs, 159 based on Foata normal form. 45/3265 useless extension candidates. Maximal degree in co-relation 9339. Up to 945 conditions per place. [2021-12-06 22:33:56,364 INFO L132 encePairwiseOnDemand]: 268/273 looper letters, 68 selfloop transitions, 8 changer transitions 0/326 dead transitions. [2021-12-06 22:33:56,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 326 transitions, 1466 flow [2021-12-06 22:33:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:33:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:33:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2021-12-06 22:33:56,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9157509157509157 [2021-12-06 22:33:56,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2021-12-06 22:33:56,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2021-12-06 22:33:56,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:56,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2021-12-06 22:33:56,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,370 INFO L186 Difference]: Start difference. First operand has 305 places, 319 transitions, 1271 flow. Second operand 3 states and 750 transitions. [2021-12-06 22:33:56,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 326 transitions, 1466 flow [2021-12-06 22:33:56,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 326 transitions, 1380 flow, removed 31 selfloop flow, removed 14 redundant places. [2021-12-06 22:33:56,398 INFO L242 Difference]: Finished difference. Result has 293 places, 311 transitions, 1153 flow [2021-12-06 22:33:56,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1153, PETRI_PLACES=293, PETRI_TRANSITIONS=311} [2021-12-06 22:33:56,399 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 51 predicate places. [2021-12-06 22:33:56,399 INFO L470 AbstractCegarLoop]: Abstraction has has 293 places, 311 transitions, 1153 flow [2021-12-06 22:33:56,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:56,400 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:56,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 22:33:56,400 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:56,401 INFO L85 PathProgramCache]: Analyzing trace with hash -615263491, now seen corresponding path program 1 times [2021-12-06 22:33:56,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:56,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207007600] [2021-12-06 22:33:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:56,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:33:56,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207007600] [2021-12-06 22:33:56,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207007600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:56,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:56,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:33:56,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984397829] [2021-12-06 22:33:56,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:56,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:33:56,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:33:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:33:56,488 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 273 [2021-12-06 22:33:56,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 311 transitions, 1153 flow. Second operand has 4 states, 4 states have (on average 241.75) internal successors, (967), 4 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:56,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 273 [2021-12-06 22:33:56,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:56,792 INFO L129 PetriNetUnfolder]: 317/1836 cut-off events. [2021-12-06 22:33:56,792 INFO L130 PetriNetUnfolder]: For 3425/3608 co-relation queries the response was YES. [2021-12-06 22:33:56,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3976 conditions, 1836 events. 317/1836 cut-off events. For 3425/3608 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11526 event pairs, 24 based on Foata normal form. 55/1698 useless extension candidates. Maximal degree in co-relation 3948. Up to 241 conditions per place. [2021-12-06 22:33:56,810 INFO L132 encePairwiseOnDemand]: 266/273 looper letters, 69 selfloop transitions, 7 changer transitions 3/326 dead transitions. [2021-12-06 22:33:56,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 326 transitions, 1431 flow [2021-12-06 22:33:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:33:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 22:33:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 984 transitions. [2021-12-06 22:33:56,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9010989010989011 [2021-12-06 22:33:56,812 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 984 transitions. [2021-12-06 22:33:56,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 984 transitions. [2021-12-06 22:33:56,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:56,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 984 transitions. [2021-12-06 22:33:56,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,817 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,817 INFO L186 Difference]: Start difference. First operand has 293 places, 311 transitions, 1153 flow. Second operand 4 states and 984 transitions. [2021-12-06 22:33:56,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 326 transitions, 1431 flow [2021-12-06 22:33:56,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 326 transitions, 1403 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 22:33:56,828 INFO L242 Difference]: Finished difference. Result has 295 places, 301 transitions, 1079 flow [2021-12-06 22:33:56,829 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1079, PETRI_PLACES=295, PETRI_TRANSITIONS=301} [2021-12-06 22:33:56,829 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 53 predicate places. [2021-12-06 22:33:56,830 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 301 transitions, 1079 flow [2021-12-06 22:33:56,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 241.75) internal successors, (967), 4 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,830 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:56,830 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:56,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:33:56,831 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash 909690777, now seen corresponding path program 2 times [2021-12-06 22:33:56,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:56,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418328710] [2021-12-06 22:33:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:56,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:33:56,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418328710] [2021-12-06 22:33:56,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418328710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:56,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:56,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:33:56,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709173591] [2021-12-06 22:33:56,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:56,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:33:56,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:56,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:33:56,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:33:56,876 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 273 [2021-12-06 22:33:56,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 301 transitions, 1079 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:56,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:56,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 273 [2021-12-06 22:33:56,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:57,241 INFO L129 PetriNetUnfolder]: 534/2146 cut-off events. [2021-12-06 22:33:57,241 INFO L130 PetriNetUnfolder]: For 5969/6212 co-relation queries the response was YES. [2021-12-06 22:33:57,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5675 conditions, 2146 events. 534/2146 cut-off events. For 5969/6212 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 12990 event pairs, 62 based on Foata normal form. 8/1923 useless extension candidates. Maximal degree in co-relation 5646. Up to 550 conditions per place. [2021-12-06 22:33:57,261 INFO L132 encePairwiseOnDemand]: 268/273 looper letters, 57 selfloop transitions, 14 changer transitions 0/315 dead transitions. [2021-12-06 22:33:57,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 315 transitions, 1335 flow [2021-12-06 22:33:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:33:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:33:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2021-12-06 22:33:57,263 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.905982905982906 [2021-12-06 22:33:57,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2021-12-06 22:33:57,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2021-12-06 22:33:57,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:57,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2021-12-06 22:33:57,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,266 INFO L186 Difference]: Start difference. First operand has 295 places, 301 transitions, 1079 flow. Second operand 3 states and 742 transitions. [2021-12-06 22:33:57,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 315 transitions, 1335 flow [2021-12-06 22:33:57,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 315 transitions, 1318 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-12-06 22:33:57,276 INFO L242 Difference]: Finished difference. Result has 297 places, 300 transitions, 1112 flow [2021-12-06 22:33:57,277 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1112, PETRI_PLACES=297, PETRI_TRANSITIONS=300} [2021-12-06 22:33:57,277 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 55 predicate places. [2021-12-06 22:33:57,278 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 300 transitions, 1112 flow [2021-12-06 22:33:57,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,278 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:57,278 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:57,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:33:57,278 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:57,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1493040361, now seen corresponding path program 1 times [2021-12-06 22:33:57,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:57,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455106954] [2021-12-06 22:33:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:57,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:33:57,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:57,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455106954] [2021-12-06 22:33:57,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455106954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:57,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:57,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:33:57,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161422409] [2021-12-06 22:33:57,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:57,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:33:57,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:33:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:33:57,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 273 [2021-12-06 22:33:57,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 300 transitions, 1112 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:57,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 273 [2021-12-06 22:33:57,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:57,704 INFO L129 PetriNetUnfolder]: 506/2073 cut-off events. [2021-12-06 22:33:57,704 INFO L130 PetriNetUnfolder]: For 6800/7049 co-relation queries the response was YES. [2021-12-06 22:33:57,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5619 conditions, 2073 events. 506/2073 cut-off events. For 6800/7049 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11942 event pairs, 66 based on Foata normal form. 20/1914 useless extension candidates. Maximal degree in co-relation 5589. Up to 529 conditions per place. [2021-12-06 22:33:57,726 INFO L132 encePairwiseOnDemand]: 267/273 looper letters, 56 selfloop transitions, 8 changer transitions 0/308 dead transitions. [2021-12-06 22:33:57,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 308 transitions, 1281 flow [2021-12-06 22:33:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:33:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:33:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 744 transitions. [2021-12-06 22:33:57,729 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9084249084249084 [2021-12-06 22:33:57,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 744 transitions. [2021-12-06 22:33:57,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 744 transitions. [2021-12-06 22:33:57,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:57,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 744 transitions. [2021-12-06 22:33:57,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,733 INFO L186 Difference]: Start difference. First operand has 297 places, 300 transitions, 1112 flow. Second operand 3 states and 744 transitions. [2021-12-06 22:33:57,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 308 transitions, 1281 flow [2021-12-06 22:33:57,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 308 transitions, 1257 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 22:33:57,745 INFO L242 Difference]: Finished difference. Result has 299 places, 296 transitions, 1076 flow [2021-12-06 22:33:57,745 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1076, PETRI_PLACES=299, PETRI_TRANSITIONS=296} [2021-12-06 22:33:57,746 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 57 predicate places. [2021-12-06 22:33:57,746 INFO L470 AbstractCegarLoop]: Abstraction has has 299 places, 296 transitions, 1076 flow [2021-12-06 22:33:57,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:57,746 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:57,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 22:33:57,747 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:57,747 INFO L85 PathProgramCache]: Analyzing trace with hash -398903463, now seen corresponding path program 1 times [2021-12-06 22:33:57,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:57,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803418909] [2021-12-06 22:33:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:57,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:33:57,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:57,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803418909] [2021-12-06 22:33:57,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803418909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:33:57,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:33:57,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:33:57,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865490299] [2021-12-06 22:33:57,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:33:57,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:33:57,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:33:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:33:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:33:57,811 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 273 [2021-12-06 22:33:57,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 296 transitions, 1076 flow. Second operand has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:57,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:33:57,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 273 [2021-12-06 22:33:57,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:33:58,233 INFO L129 PetriNetUnfolder]: 314/2163 cut-off events. [2021-12-06 22:33:58,234 INFO L130 PetriNetUnfolder]: For 4072/4244 co-relation queries the response was YES. [2021-12-06 22:33:58,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4755 conditions, 2163 events. 314/2163 cut-off events. For 4072/4244 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13786 event pairs, 43 based on Foata normal form. 3/1968 useless extension candidates. Maximal degree in co-relation 4724. Up to 385 conditions per place. [2021-12-06 22:33:58,250 INFO L132 encePairwiseOnDemand]: 265/273 looper letters, 93 selfloop transitions, 7 changer transitions 14/317 dead transitions. [2021-12-06 22:33:58,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 317 transitions, 1436 flow [2021-12-06 22:33:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:33:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 22:33:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1515 transitions. [2021-12-06 22:33:58,254 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.792778649921507 [2021-12-06 22:33:58,254 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1515 transitions. [2021-12-06 22:33:58,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1515 transitions. [2021-12-06 22:33:58,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:33:58,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1515 transitions. [2021-12-06 22:33:58,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 216.42857142857142) internal successors, (1515), 7 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:58,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:58,259 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:58,259 INFO L186 Difference]: Start difference. First operand has 299 places, 296 transitions, 1076 flow. Second operand 7 states and 1515 transitions. [2021-12-06 22:33:58,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 317 transitions, 1436 flow [2021-12-06 22:33:58,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 317 transitions, 1420 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 22:33:58,270 INFO L242 Difference]: Finished difference. Result has 305 places, 291 transitions, 1030 flow [2021-12-06 22:33:58,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1030, PETRI_PLACES=305, PETRI_TRANSITIONS=291} [2021-12-06 22:33:58,270 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 63 predicate places. [2021-12-06 22:33:58,270 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 291 transitions, 1030 flow [2021-12-06 22:33:58,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:33:58,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:33:58,271 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:33:58,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:33:58,271 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:33:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:33:58,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1434323194, now seen corresponding path program 3 times [2021-12-06 22:33:58,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:33:58,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739862881] [2021-12-06 22:33:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:33:58,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:33:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:33:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:33:59,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:33:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739862881] [2021-12-06 22:33:59,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739862881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:33:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866249275] [2021-12-06 22:33:59,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:33:59,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:33:59,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:33:59,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:33:59,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:33:59,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 22:33:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:33:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 22:33:59,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:33:59,702 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 22:33:59,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 20 [2021-12-06 22:33:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 22:33:59,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:33:59,818 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:33:59,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 22:34:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 22:34:00,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866249275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:34:00,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:34:00,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7, 7] total 26 [2021-12-06 22:34:00,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784509459] [2021-12-06 22:34:00,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:34:00,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:34:00,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:00,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:34:00,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:34:00,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 273 [2021-12-06 22:34:00,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 291 transitions, 1030 flow. Second operand has 26 states, 26 states have (on average 147.5) internal successors, (3835), 26 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:00,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:00,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 273 [2021-12-06 22:34:00,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:02,897 INFO L129 PetriNetUnfolder]: 630/3159 cut-off events. [2021-12-06 22:34:02,898 INFO L130 PetriNetUnfolder]: For 7486/7732 co-relation queries the response was YES. [2021-12-06 22:34:02,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8084 conditions, 3159 events. 630/3159 cut-off events. For 7486/7732 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 22115 event pairs, 64 based on Foata normal form. 9/2860 useless extension candidates. Maximal degree in co-relation 8051. Up to 662 conditions per place. [2021-12-06 22:34:02,923 INFO L132 encePairwiseOnDemand]: 247/273 looper letters, 199 selfloop transitions, 58 changer transitions 21/410 dead transitions. [2021-12-06 22:34:02,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 410 transitions, 2040 flow [2021-12-06 22:34:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 22:34:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-06 22:34:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 6691 transitions. [2021-12-06 22:34:02,931 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5328077719382067 [2021-12-06 22:34:02,931 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 6691 transitions. [2021-12-06 22:34:02,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 6691 transitions. [2021-12-06 22:34:02,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:02,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 6691 transitions. [2021-12-06 22:34:02,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 145.45652173913044) internal successors, (6691), 46 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:02,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 273.0) internal successors, (12831), 47 states have internal predecessors, (12831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:02,954 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 273.0) internal successors, (12831), 47 states have internal predecessors, (12831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:02,954 INFO L186 Difference]: Start difference. First operand has 305 places, 291 transitions, 1030 flow. Second operand 46 states and 6691 transitions. [2021-12-06 22:34:02,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 410 transitions, 2040 flow [2021-12-06 22:34:02,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 410 transitions, 2006 flow, removed 9 selfloop flow, removed 7 redundant places. [2021-12-06 22:34:02,967 INFO L242 Difference]: Finished difference. Result has 348 places, 311 transitions, 1290 flow [2021-12-06 22:34:02,968 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1290, PETRI_PLACES=348, PETRI_TRANSITIONS=311} [2021-12-06 22:34:02,968 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 106 predicate places. [2021-12-06 22:34:02,968 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 311 transitions, 1290 flow [2021-12-06 22:34:02,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 147.5) internal successors, (3835), 26 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:02,969 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:02,969 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:02,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:34:03,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 22:34:03,170 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:03,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1506337083, now seen corresponding path program 1 times [2021-12-06 22:34:03,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:03,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598475883] [2021-12-06 22:34:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:03,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:34:03,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:03,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598475883] [2021-12-06 22:34:03,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598475883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:34:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100600597] [2021-12-06 22:34:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:03,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:03,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:03,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:03,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:34:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:03,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 22:34:03,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:34:04,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:34:04,413 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:34:04,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 22:34:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:34:04,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100600597] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:34:04,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:34:04,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 13] total 40 [2021-12-06 22:34:04,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985478985] [2021-12-06 22:34:04,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:34:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 22:34:04,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 22:34:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 22:34:04,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2021-12-06 22:34:04,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 311 transitions, 1290 flow. Second operand has 40 states, 40 states have (on average 136.025) internal successors, (5441), 40 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:04,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:04,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2021-12-06 22:34:04,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:10,092 INFO L129 PetriNetUnfolder]: 6481/18842 cut-off events. [2021-12-06 22:34:10,092 INFO L130 PetriNetUnfolder]: For 68741/70817 co-relation queries the response was YES. [2021-12-06 22:34:10,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59120 conditions, 18842 events. 6481/18842 cut-off events. For 68741/70817 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 194843 event pairs, 320 based on Foata normal form. 86/17004 useless extension candidates. Maximal degree in co-relation 59080. Up to 3229 conditions per place. [2021-12-06 22:34:10,358 INFO L132 encePairwiseOnDemand]: 240/273 looper letters, 506 selfloop transitions, 96 changer transitions 24/752 dead transitions. [2021-12-06 22:34:10,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 752 transitions, 5319 flow [2021-12-06 22:34:10,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 22:34:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-06 22:34:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 6665 transitions. [2021-12-06 22:34:10,363 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5194450939131791 [2021-12-06 22:34:10,363 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 6665 transitions. [2021-12-06 22:34:10,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 6665 transitions. [2021-12-06 22:34:10,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:10,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 6665 transitions. [2021-12-06 22:34:10,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 141.80851063829786) internal successors, (6665), 47 states have internal predecessors, (6665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:10,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 273.0) internal successors, (13104), 48 states have internal predecessors, (13104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:10,382 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 273.0) internal successors, (13104), 48 states have internal predecessors, (13104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:10,382 INFO L186 Difference]: Start difference. First operand has 348 places, 311 transitions, 1290 flow. Second operand 47 states and 6665 transitions. [2021-12-06 22:34:10,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 752 transitions, 5319 flow [2021-12-06 22:34:10,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 752 transitions, 5098 flow, removed 66 selfloop flow, removed 29 redundant places. [2021-12-06 22:34:10,445 INFO L242 Difference]: Finished difference. Result has 387 places, 381 transitions, 2253 flow [2021-12-06 22:34:10,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2253, PETRI_PLACES=387, PETRI_TRANSITIONS=381} [2021-12-06 22:34:10,445 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 145 predicate places. [2021-12-06 22:34:10,445 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 381 transitions, 2253 flow [2021-12-06 22:34:10,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 136.025) internal successors, (5441), 40 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:10,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:10,446 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:10,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:34:10,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 22:34:10,648 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:10,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1333290306, now seen corresponding path program 1 times [2021-12-06 22:34:10,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:10,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745559890] [2021-12-06 22:34:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:10,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:34:10,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:10,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745559890] [2021-12-06 22:34:10,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745559890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:34:10,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151389101] [2021-12-06 22:34:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:10,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:10,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:10,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:10,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:34:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:10,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 22:34:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:34:11,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:34:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 22:34:12,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151389101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:34:12,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:34:12,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2021-12-06 22:34:12,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358149809] [2021-12-06 22:34:12,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:34:12,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:34:12,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:34:12,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:34:12,126 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 273 [2021-12-06 22:34:12,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 381 transitions, 2253 flow. Second operand has 22 states, 22 states have (on average 206.04545454545453) internal successors, (4533), 22 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:12,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:12,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 273 [2021-12-06 22:34:12,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:16,795 INFO L129 PetriNetUnfolder]: 4334/20971 cut-off events. [2021-12-06 22:34:16,795 INFO L130 PetriNetUnfolder]: For 95163/98109 co-relation queries the response was YES. [2021-12-06 22:34:16,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61817 conditions, 20971 events. 4334/20971 cut-off events. For 95163/98109 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 265545 event pairs, 375 based on Foata normal form. 134/18804 useless extension candidates. Maximal degree in co-relation 61759. Up to 2612 conditions per place. [2021-12-06 22:34:17,060 INFO L132 encePairwiseOnDemand]: 250/273 looper letters, 253 selfloop transitions, 62 changer transitions 4/526 dead transitions. [2021-12-06 22:34:17,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 526 transitions, 4428 flow [2021-12-06 22:34:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 22:34:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-06 22:34:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4337 transitions. [2021-12-06 22:34:17,064 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7564974707831851 [2021-12-06 22:34:17,064 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4337 transitions. [2021-12-06 22:34:17,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4337 transitions. [2021-12-06 22:34:17,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:17,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4337 transitions. [2021-12-06 22:34:17,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 206.52380952380952) internal successors, (4337), 21 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:17,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:17,073 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:17,073 INFO L186 Difference]: Start difference. First operand has 387 places, 381 transitions, 2253 flow. Second operand 21 states and 4337 transitions. [2021-12-06 22:34:17,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 526 transitions, 4428 flow [2021-12-06 22:34:17,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 526 transitions, 3939 flow, removed 210 selfloop flow, removed 22 redundant places. [2021-12-06 22:34:17,328 INFO L242 Difference]: Finished difference. Result has 380 places, 395 transitions, 2478 flow [2021-12-06 22:34:17,328 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2478, PETRI_PLACES=380, PETRI_TRANSITIONS=395} [2021-12-06 22:34:17,329 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 138 predicate places. [2021-12-06 22:34:17,329 INFO L470 AbstractCegarLoop]: Abstraction has has 380 places, 395 transitions, 2478 flow [2021-12-06 22:34:17,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 206.04545454545453) internal successors, (4533), 22 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:17,329 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:17,329 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:17,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:34:17,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:17,531 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:17,533 INFO L85 PathProgramCache]: Analyzing trace with hash 347758304, now seen corresponding path program 2 times [2021-12-06 22:34:17,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:17,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203629623] [2021-12-06 22:34:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:17,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 22:34:17,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203629623] [2021-12-06 22:34:17,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203629623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:34:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893641200] [2021-12-06 22:34:17,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:34:17,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:17,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:17,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:17,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:34:17,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:34:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:34:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:34:17,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 22:34:17,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:34:17,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893641200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:34:17,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:34:17,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 22:34:17,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837567789] [2021-12-06 22:34:17,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:34:17,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:34:17,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:17,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:34:17,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:34:17,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 273 [2021-12-06 22:34:17,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 395 transitions, 2478 flow. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:17,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:17,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 273 [2021-12-06 22:34:17,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:24,256 INFO L129 PetriNetUnfolder]: 7938/30418 cut-off events. [2021-12-06 22:34:24,256 INFO L130 PetriNetUnfolder]: For 171200/176227 co-relation queries the response was YES. [2021-12-06 22:34:24,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94697 conditions, 30418 events. 7938/30418 cut-off events. For 171200/176227 co-relation queries the response was YES. Maximal size of possible extension queue 1075. Compared 393777 event pairs, 1891 based on Foata normal form. 216/27093 useless extension candidates. Maximal degree in co-relation 94645. Up to 6222 conditions per place. [2021-12-06 22:34:24,742 INFO L132 encePairwiseOnDemand]: 270/273 looper letters, 131 selfloop transitions, 25 changer transitions 0/438 dead transitions. [2021-12-06 22:34:24,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 438 transitions, 3408 flow [2021-12-06 22:34:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:34:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:34:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2021-12-06 22:34:24,744 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-12-06 22:34:24,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2021-12-06 22:34:24,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2021-12-06 22:34:24,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:24,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2021-12-06 22:34:24,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:24,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:24,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:24,746 INFO L186 Difference]: Start difference. First operand has 380 places, 395 transitions, 2478 flow. Second operand 3 states and 749 transitions. [2021-12-06 22:34:24,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 438 transitions, 3408 flow [2021-12-06 22:34:24,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 438 transitions, 3288 flow, removed 39 selfloop flow, removed 14 redundant places. [2021-12-06 22:34:24,892 INFO L242 Difference]: Finished difference. Result has 368 places, 392 transitions, 2413 flow [2021-12-06 22:34:24,892 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2413, PETRI_PLACES=368, PETRI_TRANSITIONS=392} [2021-12-06 22:34:24,893 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 126 predicate places. [2021-12-06 22:34:24,893 INFO L470 AbstractCegarLoop]: Abstraction has has 368 places, 392 transitions, 2413 flow [2021-12-06 22:34:24,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:24,893 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:24,893 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:24,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:34:25,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:25,095 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1015200431, now seen corresponding path program 1 times [2021-12-06 22:34:25,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:25,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135221823] [2021-12-06 22:34:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:25,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 22:34:25,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:25,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135221823] [2021-12-06 22:34:25,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135221823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:34:25,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526182069] [2021-12-06 22:34:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:25,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:25,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:25,222 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:25,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:34:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:25,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:34:25,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 22:34:25,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:34:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 22:34:25,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526182069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:34:25,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:34:25,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 22:34:25,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219504019] [2021-12-06 22:34:25,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:34:25,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:34:25,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:25,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:34:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:34:25,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2021-12-06 22:34:25,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 392 transitions, 2413 flow. Second operand has 19 states, 19 states have (on average 206.31578947368422) internal successors, (3920), 19 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:25,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:25,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2021-12-06 22:34:25,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:30,089 INFO L129 PetriNetUnfolder]: 3541/18978 cut-off events. [2021-12-06 22:34:30,090 INFO L130 PetriNetUnfolder]: For 90872/93917 co-relation queries the response was YES. [2021-12-06 22:34:30,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52858 conditions, 18978 events. 3541/18978 cut-off events. For 90872/93917 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 243469 event pairs, 830 based on Foata normal form. 82/17254 useless extension candidates. Maximal degree in co-relation 52806. Up to 5094 conditions per place. [2021-12-06 22:34:30,333 INFO L132 encePairwiseOnDemand]: 254/273 looper letters, 136 selfloop transitions, 26 changer transitions 57/421 dead transitions. [2021-12-06 22:34:30,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 421 transitions, 2889 flow [2021-12-06 22:34:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:34:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 22:34:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3542 transitions. [2021-12-06 22:34:30,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7631975867269984 [2021-12-06 22:34:30,336 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3542 transitions. [2021-12-06 22:34:30,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3542 transitions. [2021-12-06 22:34:30,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:30,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3542 transitions. [2021-12-06 22:34:30,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 208.35294117647058) internal successors, (3542), 17 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:30,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 273.0) internal successors, (4914), 18 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:30,343 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 273.0) internal successors, (4914), 18 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:30,343 INFO L186 Difference]: Start difference. First operand has 368 places, 392 transitions, 2413 flow. Second operand 17 states and 3542 transitions. [2021-12-06 22:34:30,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 421 transitions, 2889 flow [2021-12-06 22:34:30,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 421 transitions, 2827 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-12-06 22:34:30,450 INFO L242 Difference]: Finished difference. Result has 379 places, 361 transitions, 2123 flow [2021-12-06 22:34:30,450 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2123, PETRI_PLACES=379, PETRI_TRANSITIONS=361} [2021-12-06 22:34:30,451 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 137 predicate places. [2021-12-06 22:34:30,451 INFO L470 AbstractCegarLoop]: Abstraction has has 379 places, 361 transitions, 2123 flow [2021-12-06 22:34:30,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 206.31578947368422) internal successors, (3920), 19 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:30,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:30,451 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:30,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:34:30,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 22:34:30,653 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:30,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash 311427636, now seen corresponding path program 2 times [2021-12-06 22:34:30,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:30,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670770802] [2021-12-06 22:34:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:30,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 22:34:30,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670770802] [2021-12-06 22:34:30,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670770802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:34:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768814497] [2021-12-06 22:34:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:34:30,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:30,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:30,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:34:30,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:34:30,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:34:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:34:30,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 22:34:30,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:34:30,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768814497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:34:30,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:34:30,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-06 22:34:30,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264661294] [2021-12-06 22:34:30,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:34:30,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:34:30,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:30,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:34:30,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:34:30,972 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 273 [2021-12-06 22:34:30,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 361 transitions, 2123 flow. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:30,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:30,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 273 [2021-12-06 22:34:30,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:35,197 INFO L129 PetriNetUnfolder]: 4947/20565 cut-off events. [2021-12-06 22:34:35,197 INFO L130 PetriNetUnfolder]: For 78478/81804 co-relation queries the response was YES. [2021-12-06 22:34:35,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53997 conditions, 20565 events. 4947/20565 cut-off events. For 78478/81804 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 251192 event pairs, 1811 based on Foata normal form. 33/18433 useless extension candidates. Maximal degree in co-relation 53946. Up to 5321 conditions per place. [2021-12-06 22:34:35,448 INFO L132 encePairwiseOnDemand]: 270/273 looper letters, 85 selfloop transitions, 7 changer transitions 0/357 dead transitions. [2021-12-06 22:34:35,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 357 transitions, 2229 flow [2021-12-06 22:34:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:34:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:34:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2021-12-06 22:34:35,450 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-12-06 22:34:35,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2021-12-06 22:34:35,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2021-12-06 22:34:35,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:35,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2021-12-06 22:34:35,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:35,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:35,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:35,452 INFO L186 Difference]: Start difference. First operand has 379 places, 361 transitions, 2123 flow. Second operand 3 states and 749 transitions. [2021-12-06 22:34:35,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 357 transitions, 2229 flow [2021-12-06 22:34:35,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 357 transitions, 2073 flow, removed 41 selfloop flow, removed 22 redundant places. [2021-12-06 22:34:35,538 INFO L242 Difference]: Finished difference. Result has 339 places, 325 transitions, 1508 flow [2021-12-06 22:34:35,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1508, PETRI_PLACES=339, PETRI_TRANSITIONS=325} [2021-12-06 22:34:35,538 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 97 predicate places. [2021-12-06 22:34:35,538 INFO L470 AbstractCegarLoop]: Abstraction has has 339 places, 325 transitions, 1508 flow [2021-12-06 22:34:35,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:35,539 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:35,539 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:35,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:34:35,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:35,741 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:35,742 INFO L85 PathProgramCache]: Analyzing trace with hash 197102292, now seen corresponding path program 2 times [2021-12-06 22:34:35,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:35,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744091503] [2021-12-06 22:34:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:35,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:34:35,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:35,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744091503] [2021-12-06 22:34:35,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744091503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:34:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263759672] [2021-12-06 22:34:35,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:34:35,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:35,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:35,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:35,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:34:36,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:34:36,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:34:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:34:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:34:36,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:34:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:34:36,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263759672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:34:36,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:34:36,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 5] total 16 [2021-12-06 22:34:36,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466838686] [2021-12-06 22:34:36,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:34:36,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:34:36,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:34:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:34:36,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 273 [2021-12-06 22:34:36,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 325 transitions, 1508 flow. Second operand has 16 states, 16 states have (on average 206.375) internal successors, (3302), 16 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:36,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:36,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 273 [2021-12-06 22:34:36,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:38,749 INFO L129 PetriNetUnfolder]: 1048/7414 cut-off events. [2021-12-06 22:34:38,749 INFO L130 PetriNetUnfolder]: For 29144/30171 co-relation queries the response was YES. [2021-12-06 22:34:38,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17858 conditions, 7414 events. 1048/7414 cut-off events. For 29144/30171 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 73319 event pairs, 265 based on Foata normal form. 160/7001 useless extension candidates. Maximal degree in co-relation 17815. Up to 673 conditions per place. [2021-12-06 22:34:38,832 INFO L132 encePairwiseOnDemand]: 260/273 looper letters, 151 selfloop transitions, 20 changer transitions 2/371 dead transitions. [2021-12-06 22:34:38,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 371 transitions, 2375 flow [2021-12-06 22:34:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:34:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:34:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3315 transitions. [2021-12-06 22:34:38,836 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7589285714285714 [2021-12-06 22:34:38,836 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3315 transitions. [2021-12-06 22:34:38,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3315 transitions. [2021-12-06 22:34:38,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:38,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3315 transitions. [2021-12-06 22:34:38,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 207.1875) internal successors, (3315), 16 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:38,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 273.0) internal successors, (4641), 17 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:38,844 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 273.0) internal successors, (4641), 17 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:38,844 INFO L186 Difference]: Start difference. First operand has 339 places, 325 transitions, 1508 flow. Second operand 16 states and 3315 transitions. [2021-12-06 22:34:38,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 371 transitions, 2375 flow [2021-12-06 22:34:38,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 371 transitions, 2249 flow, removed 43 selfloop flow, removed 4 redundant places. [2021-12-06 22:34:38,863 INFO L242 Difference]: Finished difference. Result has 349 places, 311 transitions, 1375 flow [2021-12-06 22:34:38,863 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1375, PETRI_PLACES=349, PETRI_TRANSITIONS=311} [2021-12-06 22:34:38,864 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 107 predicate places. [2021-12-06 22:34:38,864 INFO L470 AbstractCegarLoop]: Abstraction has has 349 places, 311 transitions, 1375 flow [2021-12-06 22:34:38,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 206.375) internal successors, (3302), 16 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:38,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:38,865 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:38,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:34:39,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:39,067 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2125942751, now seen corresponding path program 1 times [2021-12-06 22:34:39,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:39,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706760736] [2021-12-06 22:34:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:39,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:34:39,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:39,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706760736] [2021-12-06 22:34:39,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706760736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:34:39,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537540530] [2021-12-06 22:34:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:39,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:39,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:39,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:39,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:34:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:39,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 22:34:39,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:34:40,508 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 22:34:40,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 20 [2021-12-06 22:34:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:34:40,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:34:40,621 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:34:40,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 22:34:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:34:42,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537540530] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:34:42,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:34:42,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 46 [2021-12-06 22:34:42,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794746536] [2021-12-06 22:34:42,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:34:42,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 22:34:42,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 22:34:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1813, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 22:34:42,188 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 273 [2021-12-06 22:34:42,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 311 transitions, 1375 flow. Second operand has 46 states, 46 states have (on average 146.34782608695653) internal successors, (6732), 46 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:42,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:42,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 273 [2021-12-06 22:34:42,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:49,927 INFO L129 PetriNetUnfolder]: 4810/23846 cut-off events. [2021-12-06 22:34:49,928 INFO L130 PetriNetUnfolder]: For 77792/81354 co-relation queries the response was YES. [2021-12-06 22:34:50,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61031 conditions, 23846 events. 4810/23846 cut-off events. For 77792/81354 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 282938 event pairs, 372 based on Foata normal form. 179/21611 useless extension candidates. Maximal degree in co-relation 60988. Up to 2700 conditions per place. [2021-12-06 22:34:50,166 INFO L132 encePairwiseOnDemand]: 237/273 looper letters, 346 selfloop transitions, 95 changer transitions 40/614 dead transitions. [2021-12-06 22:34:50,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 614 transitions, 4416 flow [2021-12-06 22:34:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 22:34:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-12-06 22:34:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8243 transitions. [2021-12-06 22:34:50,172 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5391810570381999 [2021-12-06 22:34:50,172 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8243 transitions. [2021-12-06 22:34:50,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8243 transitions. [2021-12-06 22:34:50,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:50,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8243 transitions. [2021-12-06 22:34:50,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 147.19642857142858) internal successors, (8243), 56 states have internal predecessors, (8243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:50,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:50,191 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:50,191 INFO L186 Difference]: Start difference. First operand has 349 places, 311 transitions, 1375 flow. Second operand 56 states and 8243 transitions. [2021-12-06 22:34:50,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 614 transitions, 4416 flow [2021-12-06 22:34:50,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 614 transitions, 4376 flow, removed 0 selfloop flow, removed 11 redundant places. [2021-12-06 22:34:50,219 INFO L242 Difference]: Finished difference. Result has 414 places, 367 transitions, 2494 flow [2021-12-06 22:34:50,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2494, PETRI_PLACES=414, PETRI_TRANSITIONS=367} [2021-12-06 22:34:50,219 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 172 predicate places. [2021-12-06 22:34:50,219 INFO L470 AbstractCegarLoop]: Abstraction has has 414 places, 367 transitions, 2494 flow [2021-12-06 22:34:50,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 146.34782608695653) internal successors, (6732), 46 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:50,220 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:50,220 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:50,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 22:34:50,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 22:34:50,422 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1397394878, now seen corresponding path program 1 times [2021-12-06 22:34:50,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:50,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145896352] [2021-12-06 22:34:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:50,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 22:34:50,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:50,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145896352] [2021-12-06 22:34:50,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145896352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:34:50,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:34:50,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:34:50,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26594313] [2021-12-06 22:34:50,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:34:50,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:34:50,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:34:50,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:34:50,494 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 273 [2021-12-06 22:34:50,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 367 transitions, 2494 flow. Second operand has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:50,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:50,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 273 [2021-12-06 22:34:50,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:54,227 INFO L129 PetriNetUnfolder]: 2286/15711 cut-off events. [2021-12-06 22:34:54,227 INFO L130 PetriNetUnfolder]: For 71501/73319 co-relation queries the response was YES. [2021-12-06 22:34:54,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42510 conditions, 15711 events. 2286/15711 cut-off events. For 71501/73319 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 179041 event pairs, 655 based on Foata normal form. 7/14298 useless extension candidates. Maximal degree in co-relation 42446. Up to 3504 conditions per place. [2021-12-06 22:34:54,469 INFO L132 encePairwiseOnDemand]: 263/273 looper letters, 192 selfloop transitions, 15 changer transitions 9/425 dead transitions. [2021-12-06 22:34:54,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 425 transitions, 3488 flow [2021-12-06 22:34:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:34:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 22:34:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1945 transitions. [2021-12-06 22:34:54,471 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7916157916157917 [2021-12-06 22:34:54,472 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1945 transitions. [2021-12-06 22:34:54,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1945 transitions. [2021-12-06 22:34:54,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:54,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1945 transitions. [2021-12-06 22:34:54,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.11111111111111) internal successors, (1945), 9 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:54,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:54,475 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:54,475 INFO L186 Difference]: Start difference. First operand has 414 places, 367 transitions, 2494 flow. Second operand 9 states and 1945 transitions. [2021-12-06 22:34:54,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 425 transitions, 3488 flow [2021-12-06 22:34:54,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 425 transitions, 3146 flow, removed 119 selfloop flow, removed 37 redundant places. [2021-12-06 22:34:54,674 INFO L242 Difference]: Finished difference. Result has 375 places, 372 transitions, 2251 flow [2021-12-06 22:34:54,674 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2251, PETRI_PLACES=375, PETRI_TRANSITIONS=372} [2021-12-06 22:34:54,674 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 133 predicate places. [2021-12-06 22:34:54,674 INFO L470 AbstractCegarLoop]: Abstraction has has 375 places, 372 transitions, 2251 flow [2021-12-06 22:34:54,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:54,675 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:54,675 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:54,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 22:34:54,675 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:54,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1690464654, now seen corresponding path program 2 times [2021-12-06 22:34:54,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:54,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682182451] [2021-12-06 22:34:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:54,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 22:34:54,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682182451] [2021-12-06 22:34:54,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682182451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:34:54,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:34:54,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:34:54,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213763825] [2021-12-06 22:34:54,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:34:54,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:34:54,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:54,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:34:54,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:34:54,714 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 273 [2021-12-06 22:34:54,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 372 transitions, 2251 flow. Second operand has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:54,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:34:54,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 273 [2021-12-06 22:34:54,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:34:59,234 INFO L129 PetriNetUnfolder]: 3771/19664 cut-off events. [2021-12-06 22:34:59,234 INFO L130 PetriNetUnfolder]: For 83557/86124 co-relation queries the response was YES. [2021-12-06 22:34:59,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51286 conditions, 19664 events. 3771/19664 cut-off events. For 83557/86124 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 213168 event pairs, 1088 based on Foata normal form. 260/17938 useless extension candidates. Maximal degree in co-relation 51232. Up to 3844 conditions per place. [2021-12-06 22:34:59,427 INFO L132 encePairwiseOnDemand]: 268/273 looper letters, 127 selfloop transitions, 10 changer transitions 4/406 dead transitions. [2021-12-06 22:34:59,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 406 transitions, 2965 flow [2021-12-06 22:34:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:34:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:34:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2021-12-06 22:34:59,429 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9072039072039072 [2021-12-06 22:34:59,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2021-12-06 22:34:59,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2021-12-06 22:34:59,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:34:59,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2021-12-06 22:34:59,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:59,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:59,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:59,430 INFO L186 Difference]: Start difference. First operand has 375 places, 372 transitions, 2251 flow. Second operand 3 states and 743 transitions. [2021-12-06 22:34:59,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 406 transitions, 2965 flow [2021-12-06 22:34:59,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 406 transitions, 2915 flow, removed 18 selfloop flow, removed 3 redundant places. [2021-12-06 22:34:59,522 INFO L242 Difference]: Finished difference. Result has 374 places, 359 transitions, 2129 flow [2021-12-06 22:34:59,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2129, PETRI_PLACES=374, PETRI_TRANSITIONS=359} [2021-12-06 22:34:59,523 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 132 predicate places. [2021-12-06 22:34:59,523 INFO L470 AbstractCegarLoop]: Abstraction has has 374 places, 359 transitions, 2129 flow [2021-12-06 22:34:59,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:34:59,523 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:34:59,524 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:59,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 22:34:59,524 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:34:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1979852549, now seen corresponding path program 1 times [2021-12-06 22:34:59,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:59,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203476314] [2021-12-06 22:34:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:59,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:34:59,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:59,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203476314] [2021-12-06 22:34:59,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203476314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:34:59,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531193996] [2021-12-06 22:34:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:59,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:34:59,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:34:59,636 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:34:59,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:34:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:59,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 22:34:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:35:00,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:35:00,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531193996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:35:00,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:35:00,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 22:35:00,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507537857] [2021-12-06 22:35:00,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:35:00,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:35:00,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:00,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:35:00,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:35:00,301 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 273 [2021-12-06 22:35:00,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 359 transitions, 2129 flow. Second operand has 19 states, 19 states have (on average 204.57894736842104) internal successors, (3887), 19 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:00,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:35:00,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 273 [2021-12-06 22:35:00,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:35:03,729 INFO L129 PetriNetUnfolder]: 1948/14366 cut-off events. [2021-12-06 22:35:03,730 INFO L130 PetriNetUnfolder]: For 49996/51433 co-relation queries the response was YES. [2021-12-06 22:35:03,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33803 conditions, 14366 events. 1948/14366 cut-off events. For 49996/51433 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 153097 event pairs, 624 based on Foata normal form. 14/13117 useless extension candidates. Maximal degree in co-relation 33749. Up to 3122 conditions per place. [2021-12-06 22:35:03,869 INFO L132 encePairwiseOnDemand]: 255/273 looper letters, 140 selfloop transitions, 36 changer transitions 52/422 dead transitions. [2021-12-06 22:35:03,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 422 transitions, 3101 flow [2021-12-06 22:35:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:35:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:35:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3299 transitions. [2021-12-06 22:35:03,872 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7552655677655677 [2021-12-06 22:35:03,872 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3299 transitions. [2021-12-06 22:35:03,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3299 transitions. [2021-12-06 22:35:03,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:35:03,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3299 transitions. [2021-12-06 22:35:03,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 206.1875) internal successors, (3299), 16 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:03,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 273.0) internal successors, (4641), 17 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:03,877 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 273.0) internal successors, (4641), 17 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:03,877 INFO L186 Difference]: Start difference. First operand has 374 places, 359 transitions, 2129 flow. Second operand 16 states and 3299 transitions. [2021-12-06 22:35:03,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 422 transitions, 3101 flow [2021-12-06 22:35:03,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 422 transitions, 3050 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-06 22:35:03,939 INFO L242 Difference]: Finished difference. Result has 388 places, 365 transitions, 2247 flow [2021-12-06 22:35:03,939 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2247, PETRI_PLACES=388, PETRI_TRANSITIONS=365} [2021-12-06 22:35:03,939 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 146 predicate places. [2021-12-06 22:35:03,939 INFO L470 AbstractCegarLoop]: Abstraction has has 388 places, 365 transitions, 2247 flow [2021-12-06 22:35:03,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 204.57894736842104) internal successors, (3887), 19 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:03,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:35:03,940 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:03,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 22:35:04,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 22:35:04,142 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:35:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash -348158944, now seen corresponding path program 2 times [2021-12-06 22:35:04,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:04,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006376328] [2021-12-06 22:35:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:04,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 22:35:04,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:04,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006376328] [2021-12-06 22:35:04,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006376328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:35:04,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594784549] [2021-12-06 22:35:04,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:35:04,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:04,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:04,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:04,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:35:04,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:35:04,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:35:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 22:35:04,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:35:05,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:05,564 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:35:05,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 22:35:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:35:06,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594784549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:35:06,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:35:06,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 14] total 42 [2021-12-06 22:35:06,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275234540] [2021-12-06 22:35:06,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:35:06,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 22:35:06,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 22:35:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 22:35:06,775 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 273 [2021-12-06 22:35:06,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 365 transitions, 2247 flow. Second operand has 42 states, 42 states have (on average 146.54761904761904) internal successors, (6155), 42 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:06,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:35:06,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 273 [2021-12-06 22:35:06,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:35:13,799 INFO L129 PetriNetUnfolder]: 4289/23150 cut-off events. [2021-12-06 22:35:13,799 INFO L130 PetriNetUnfolder]: For 91732/94824 co-relation queries the response was YES. [2021-12-06 22:35:14,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60268 conditions, 23150 events. 4289/23150 cut-off events. For 91732/94824 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 256932 event pairs, 1240 based on Foata normal form. 104/20938 useless extension candidates. Maximal degree in co-relation 60209. Up to 6786 conditions per place. [2021-12-06 22:35:14,071 INFO L132 encePairwiseOnDemand]: 242/273 looper letters, 273 selfloop transitions, 56 changer transitions 53/513 dead transitions. [2021-12-06 22:35:14,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 513 transitions, 4029 flow [2021-12-06 22:35:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 22:35:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-06 22:35:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5557 transitions. [2021-12-06 22:35:14,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5356660882976673 [2021-12-06 22:35:14,076 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5557 transitions. [2021-12-06 22:35:14,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5557 transitions. [2021-12-06 22:35:14,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:35:14,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5557 transitions. [2021-12-06 22:35:14,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 146.23684210526315) internal successors, (5557), 38 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:14,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 273.0) internal successors, (10647), 39 states have internal predecessors, (10647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:14,087 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 273.0) internal successors, (10647), 39 states have internal predecessors, (10647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:14,087 INFO L186 Difference]: Start difference. First operand has 388 places, 365 transitions, 2247 flow. Second operand 38 states and 5557 transitions. [2021-12-06 22:35:14,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 513 transitions, 4029 flow [2021-12-06 22:35:14,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 513 transitions, 3924 flow, removed 13 selfloop flow, removed 9 redundant places. [2021-12-06 22:35:14,190 INFO L242 Difference]: Finished difference. Result has 428 places, 362 transitions, 2374 flow [2021-12-06 22:35:14,190 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2374, PETRI_PLACES=428, PETRI_TRANSITIONS=362} [2021-12-06 22:35:14,190 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 186 predicate places. [2021-12-06 22:35:14,190 INFO L470 AbstractCegarLoop]: Abstraction has has 428 places, 362 transitions, 2374 flow [2021-12-06 22:35:14,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 146.54761904761904) internal successors, (6155), 42 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:14,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:35:14,191 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:14,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 22:35:14,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 22:35:14,394 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:35:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:14,395 INFO L85 PathProgramCache]: Analyzing trace with hash 488533059, now seen corresponding path program 3 times [2021-12-06 22:35:14,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:14,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980430131] [2021-12-06 22:35:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:14,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 67 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 22:35:14,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:14,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980430131] [2021-12-06 22:35:14,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980430131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:35:14,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617043359] [2021-12-06 22:35:14,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:35:14,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:14,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:14,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:14,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:35:15,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 22:35:15,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:35:15,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 22:35:15,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:15,756 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 22:35:15,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 20 [2021-12-06 22:35:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 22:35:15,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:15,869 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:35:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 22:35:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 22:35:16,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617043359] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:35:16,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:35:16,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11, 8] total 34 [2021-12-06 22:35:16,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869992071] [2021-12-06 22:35:16,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:35:16,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 22:35:16,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 22:35:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 22:35:16,355 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 273 [2021-12-06 22:35:16,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 362 transitions, 2374 flow. Second operand has 34 states, 34 states have (on average 146.97058823529412) internal successors, (4997), 34 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:16,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:35:16,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 273 [2021-12-06 22:35:16,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:35:37,742 INFO L129 PetriNetUnfolder]: 13442/67975 cut-off events. [2021-12-06 22:35:37,743 INFO L130 PetriNetUnfolder]: For 342212/351650 co-relation queries the response was YES. [2021-12-06 22:35:38,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190691 conditions, 67975 events. 13442/67975 cut-off events. For 342212/351650 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 955391 event pairs, 493 based on Foata normal form. 369/61288 useless extension candidates. Maximal degree in co-relation 190619. Up to 8368 conditions per place. [2021-12-06 22:35:38,978 INFO L132 encePairwiseOnDemand]: 225/273 looper letters, 584 selfloop transitions, 211 changer transitions 60/986 dead transitions. [2021-12-06 22:35:38,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 986 transitions, 10206 flow [2021-12-06 22:35:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 22:35:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-12-06 22:35:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 12788 transitions. [2021-12-06 22:35:38,987 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5384194349711591 [2021-12-06 22:35:38,987 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 12788 transitions. [2021-12-06 22:35:38,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 12788 transitions. [2021-12-06 22:35:38,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:35:38,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 12788 transitions. [2021-12-06 22:35:38,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 146.98850574712642) internal successors, (12788), 87 states have internal predecessors, (12788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:39,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 273.0) internal successors, (24024), 88 states have internal predecessors, (24024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:39,012 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 273.0) internal successors, (24024), 88 states have internal predecessors, (24024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:39,012 INFO L186 Difference]: Start difference. First operand has 428 places, 362 transitions, 2374 flow. Second operand 87 states and 12788 transitions. [2021-12-06 22:35:39,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 986 transitions, 10206 flow [2021-12-06 22:35:39,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 986 transitions, 9686 flow, removed 149 selfloop flow, removed 25 redundant places. [2021-12-06 22:35:39,868 INFO L242 Difference]: Finished difference. Result has 511 places, 502 transitions, 5034 flow [2021-12-06 22:35:39,868 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=5034, PETRI_PLACES=511, PETRI_TRANSITIONS=502} [2021-12-06 22:35:39,868 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 269 predicate places. [2021-12-06 22:35:39,869 INFO L470 AbstractCegarLoop]: Abstraction has has 511 places, 502 transitions, 5034 flow [2021-12-06 22:35:39,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 146.97058823529412) internal successors, (4997), 34 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:39,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:35:39,869 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:39,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:35:40,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:40,071 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:35:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1523095075, now seen corresponding path program 4 times [2021-12-06 22:35:40,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:40,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661735292] [2021-12-06 22:35:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:40,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 22:35:40,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:40,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661735292] [2021-12-06 22:35:40,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661735292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:35:40,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495302587] [2021-12-06 22:35:40,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:35:40,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:40,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:40,164 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:40,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:35:40,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:35:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:35:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:35:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 22:35:40,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-06 22:35:40,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495302587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:35:40,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:35:40,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2021-12-06 22:35:40,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618162141] [2021-12-06 22:35:40,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:35:40,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:35:40,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:40,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:35:40,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:35:40,988 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 273 [2021-12-06 22:35:40,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 502 transitions, 5034 flow. Second operand has 7 states, 7 states have (on average 246.0) internal successors, (1722), 7 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:40,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:35:40,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 273 [2021-12-06 22:35:40,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:35:41,792 INFO L129 PetriNetUnfolder]: 171/3214 cut-off events. [2021-12-06 22:35:41,792 INFO L130 PetriNetUnfolder]: For 10997/11253 co-relation queries the response was YES. [2021-12-06 22:35:41,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6262 conditions, 3214 events. 171/3214 cut-off events. For 10997/11253 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 24576 event pairs, 56 based on Foata normal form. 88/3042 useless extension candidates. Maximal degree in co-relation 6158. Up to 474 conditions per place. [2021-12-06 22:35:41,820 INFO L132 encePairwiseOnDemand]: 268/273 looper letters, 37 selfloop transitions, 10 changer transitions 17/357 dead transitions. [2021-12-06 22:35:41,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 357 transitions, 2298 flow [2021-12-06 22:35:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:35:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 22:35:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1227 transitions. [2021-12-06 22:35:41,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8989010989010989 [2021-12-06 22:35:41,822 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1227 transitions. [2021-12-06 22:35:41,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1227 transitions. [2021-12-06 22:35:41,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:35:41,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1227 transitions. [2021-12-06 22:35:41,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 245.4) internal successors, (1227), 5 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:41,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:41,824 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:41,824 INFO L186 Difference]: Start difference. First operand has 511 places, 502 transitions, 5034 flow. Second operand 5 states and 1227 transitions. [2021-12-06 22:35:41,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 357 transitions, 2298 flow [2021-12-06 22:35:41,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 357 transitions, 1947 flow, removed 71 selfloop flow, removed 72 redundant places. [2021-12-06 22:35:41,850 INFO L242 Difference]: Finished difference. Result has 403 places, 338 transitions, 1675 flow [2021-12-06 22:35:41,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1675, PETRI_PLACES=403, PETRI_TRANSITIONS=338} [2021-12-06 22:35:41,851 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 161 predicate places. [2021-12-06 22:35:41,851 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 338 transitions, 1675 flow [2021-12-06 22:35:41,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.0) internal successors, (1722), 7 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:41,852 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:35:41,852 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:41,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 22:35:42,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:42,054 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:35:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:42,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1124136782, now seen corresponding path program 5 times [2021-12-06 22:35:42,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:42,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284596175] [2021-12-06 22:35:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:42,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 9 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 22:35:42,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284596175] [2021-12-06 22:35:42,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284596175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:35:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555079184] [2021-12-06 22:35:42,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:35:42,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:42,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:42,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:35:42,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 22:35:42,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:35:42,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 22:35:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:35:43,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:43,161 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:35:43,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 22:35:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:35:43,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555079184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:35:43,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:35:43,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9, 8] total 29 [2021-12-06 22:35:43,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207550861] [2021-12-06 22:35:43,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:35:43,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:35:43,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:35:43,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:35:43,338 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2021-12-06 22:35:43,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 338 transitions, 1675 flow. Second operand has 29 states, 29 states have (on average 137.93103448275863) internal successors, (4000), 29 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:43,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:35:43,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2021-12-06 22:35:43,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:35:47,161 INFO L129 PetriNetUnfolder]: 1327/9654 cut-off events. [2021-12-06 22:35:47,162 INFO L130 PetriNetUnfolder]: For 9887/10231 co-relation queries the response was YES. [2021-12-06 22:35:47,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18175 conditions, 9654 events. 1327/9654 cut-off events. For 9887/10231 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 99174 event pairs, 376 based on Foata normal form. 16/8606 useless extension candidates. Maximal degree in co-relation 18112. Up to 720 conditions per place. [2021-12-06 22:35:47,235 INFO L132 encePairwiseOnDemand]: 250/273 looper letters, 262 selfloop transitions, 60 changer transitions 38/480 dead transitions. [2021-12-06 22:35:47,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 480 transitions, 3219 flow [2021-12-06 22:35:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 22:35:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-06 22:35:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4435 transitions. [2021-12-06 22:35:47,238 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5076694139194139 [2021-12-06 22:35:47,239 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4435 transitions. [2021-12-06 22:35:47,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4435 transitions. [2021-12-06 22:35:47,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:35:47,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4435 transitions. [2021-12-06 22:35:47,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 138.59375) internal successors, (4435), 32 states have internal predecessors, (4435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:47,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 273.0) internal successors, (9009), 33 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:47,247 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 273.0) internal successors, (9009), 33 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:47,247 INFO L186 Difference]: Start difference. First operand has 403 places, 338 transitions, 1675 flow. Second operand 32 states and 4435 transitions. [2021-12-06 22:35:47,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 480 transitions, 3219 flow [2021-12-06 22:35:47,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 480 transitions, 3092 flow, removed 30 selfloop flow, removed 11 redundant places. [2021-12-06 22:35:47,272 INFO L242 Difference]: Finished difference. Result has 425 places, 347 transitions, 1892 flow [2021-12-06 22:35:47,273 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1892, PETRI_PLACES=425, PETRI_TRANSITIONS=347} [2021-12-06 22:35:47,273 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 183 predicate places. [2021-12-06 22:35:47,273 INFO L470 AbstractCegarLoop]: Abstraction has has 425 places, 347 transitions, 1892 flow [2021-12-06 22:35:47,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 137.93103448275863) internal successors, (4000), 29 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:47,274 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:35:47,274 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:47,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-06 22:35:47,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 22:35:47,476 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:35:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1485507507, now seen corresponding path program 6 times [2021-12-06 22:35:47,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:47,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623936278] [2021-12-06 22:35:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:47,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 121 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 22:35:47,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623936278] [2021-12-06 22:35:47,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623936278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:35:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945060082] [2021-12-06 22:35:47,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:35:47,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:47,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:47,639 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:47,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:35:47,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 22:35:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:35:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 22:35:47,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:35:49,224 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-12-06 22:35:49,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 23 [2021-12-06 22:35:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 104 proven. 35 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 22:35:49,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:50,036 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-12-06 22:35:50,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 22 [2021-12-06 22:35:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-06 22:35:50,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945060082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:35:50,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:35:50,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 17] total 51 [2021-12-06 22:35:50,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957052921] [2021-12-06 22:35:50,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:35:50,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 22:35:50,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 22:35:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 22:35:50,433 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 273 [2021-12-06 22:35:50,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 347 transitions, 1892 flow. Second operand has 51 states, 51 states have (on average 144.76470588235293) internal successors, (7383), 51 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:50,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:35:50,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 273 [2021-12-06 22:35:50,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:35:54,483 INFO L129 PetriNetUnfolder]: 661/7260 cut-off events. [2021-12-06 22:35:54,484 INFO L130 PetriNetUnfolder]: For 7867/8259 co-relation queries the response was YES. [2021-12-06 22:35:54,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13544 conditions, 7260 events. 661/7260 cut-off events. For 7867/8259 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 72271 event pairs, 86 based on Foata normal form. 38/6576 useless extension candidates. Maximal degree in co-relation 13472. Up to 478 conditions per place. [2021-12-06 22:35:54,571 INFO L132 encePairwiseOnDemand]: 217/273 looper letters, 391 selfloop transitions, 182 changer transitions 79/781 dead transitions. [2021-12-06 22:35:54,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 781 transitions, 5927 flow [2021-12-06 22:35:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-06 22:35:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-12-06 22:35:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 18351 transitions. [2021-12-06 22:35:54,581 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5210835675951955 [2021-12-06 22:35:54,581 INFO L72 ComplementDD]: Start complementDD. Operand 129 states and 18351 transitions. [2021-12-06 22:35:54,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 18351 transitions. [2021-12-06 22:35:54,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:35:54,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 129 states and 18351 transitions. [2021-12-06 22:35:54,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 130 states, 129 states have (on average 142.25581395348837) internal successors, (18351), 129 states have internal predecessors, (18351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:54,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 130 states, 130 states have (on average 273.0) internal successors, (35490), 130 states have internal predecessors, (35490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:54,616 INFO L81 ComplementDD]: Finished complementDD. Result has 130 states, 130 states have (on average 273.0) internal successors, (35490), 130 states have internal predecessors, (35490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:54,616 INFO L186 Difference]: Start difference. First operand has 425 places, 347 transitions, 1892 flow. Second operand 129 states and 18351 transitions. [2021-12-06 22:35:54,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 781 transitions, 5927 flow [2021-12-06 22:35:54,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 781 transitions, 5555 flow, removed 101 selfloop flow, removed 28 redundant places. [2021-12-06 22:35:54,645 INFO L242 Difference]: Finished difference. Result has 555 places, 462 transitions, 3331 flow [2021-12-06 22:35:54,645 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=129, PETRI_FLOW=3331, PETRI_PLACES=555, PETRI_TRANSITIONS=462} [2021-12-06 22:35:54,646 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 313 predicate places. [2021-12-06 22:35:54,646 INFO L470 AbstractCegarLoop]: Abstraction has has 555 places, 462 transitions, 3331 flow [2021-12-06 22:35:54,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 144.76470588235293) internal successors, (7383), 51 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:54,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:35:54,647 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:54,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 22:35:54,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 22:35:54,849 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:35:54,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1618318007, now seen corresponding path program 7 times [2021-12-06 22:35:54,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823465290] [2021-12-06 22:35:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:54,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 124 proven. 40 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 22:35:55,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:55,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823465290] [2021-12-06 22:35:55,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823465290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:35:55,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697602018] [2021-12-06 22:35:55,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:35:55,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:55,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:55,010 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:55,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:35:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 22:35:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 140 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 22:35:55,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:35:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 95 proven. 69 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 22:35:56,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697602018] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:35:56,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:35:56,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2021-12-06 22:35:56,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503388764] [2021-12-06 22:35:56,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:35:56,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 22:35:56,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:35:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 22:35:56,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:35:56,092 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2021-12-06 22:35:56,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 462 transitions, 3331 flow. Second operand has 37 states, 37 states have (on average 205.8108108108108) internal successors, (7615), 37 states have internal predecessors, (7615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:56,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:35:56,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2021-12-06 22:35:56,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:35:57,943 INFO L129 PetriNetUnfolder]: 337/5204 cut-off events. [2021-12-06 22:35:57,943 INFO L130 PetriNetUnfolder]: For 12211/13267 co-relation queries the response was YES. [2021-12-06 22:35:57,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11941 conditions, 5204 events. 337/5204 cut-off events. For 12211/13267 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 48672 event pairs, 58 based on Foata normal form. 40/4736 useless extension candidates. Maximal degree in co-relation 11837. Up to 717 conditions per place. [2021-12-06 22:35:57,996 INFO L132 encePairwiseOnDemand]: 249/273 looper letters, 105 selfloop transitions, 38 changer transitions 147/489 dead transitions. [2021-12-06 22:35:57,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 489 transitions, 4002 flow [2021-12-06 22:35:57,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:35:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-06 22:35:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5789 transitions. [2021-12-06 22:35:57,999 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7573260073260073 [2021-12-06 22:35:58,000 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5789 transitions. [2021-12-06 22:35:58,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5789 transitions. [2021-12-06 22:35:58,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:35:58,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5789 transitions. [2021-12-06 22:35:58,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 206.75) internal successors, (5789), 28 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:58,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 273.0) internal successors, (7917), 29 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:58,008 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 273.0) internal successors, (7917), 29 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:58,008 INFO L186 Difference]: Start difference. First operand has 555 places, 462 transitions, 3331 flow. Second operand 28 states and 5789 transitions. [2021-12-06 22:35:58,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 489 transitions, 4002 flow [2021-12-06 22:35:58,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 489 transitions, 3789 flow, removed 57 selfloop flow, removed 35 redundant places. [2021-12-06 22:35:58,044 INFO L242 Difference]: Finished difference. Result has 545 places, 337 transitions, 1934 flow [2021-12-06 22:35:58,045 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1934, PETRI_PLACES=545, PETRI_TRANSITIONS=337} [2021-12-06 22:35:58,045 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 303 predicate places. [2021-12-06 22:35:58,045 INFO L470 AbstractCegarLoop]: Abstraction has has 545 places, 337 transitions, 1934 flow [2021-12-06 22:35:58,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 205.8108108108108) internal successors, (7615), 37 states have internal predecessors, (7615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:35:58,046 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:35:58,046 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:35:58,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 22:35:58,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:58,248 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:35:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:35:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash 593077332, now seen corresponding path program 8 times [2021-12-06 22:35:58,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:35:58,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418110878] [2021-12-06 22:35:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:35:58,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:35:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:35:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 3 proven. 154 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 22:35:58,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:35:58,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418110878] [2021-12-06 22:35:58,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418110878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:35:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106068902] [2021-12-06 22:35:58,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:35:58,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:35:58,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:35:58,836 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:35:58,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:35:58,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:35:58,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:35:58,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 22:35:58,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:35:59,835 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 22:35:59,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 20 [2021-12-06 22:35:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 125 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-06 22:35:59,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:36:00,010 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:36:00,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 22:36:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-06 22:36:01,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106068902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:36:01,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:36:01,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 55 [2021-12-06 22:36:01,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197322811] [2021-12-06 22:36:01,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:36:01,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 22:36:01,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:36:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 22:36:01,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=2535, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 22:36:01,254 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2021-12-06 22:36:01,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 337 transitions, 1934 flow. Second operand has 55 states, 55 states have (on average 137.5090909090909) internal successors, (7563), 55 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:01,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:36:01,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2021-12-06 22:36:01,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:36:05,194 INFO L129 PetriNetUnfolder]: 940/6876 cut-off events. [2021-12-06 22:36:05,194 INFO L130 PetriNetUnfolder]: For 17422/17706 co-relation queries the response was YES. [2021-12-06 22:36:05,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16769 conditions, 6876 events. 940/6876 cut-off events. For 17422/17706 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 65073 event pairs, 336 based on Foata normal form. 6/6090 useless extension candidates. Maximal degree in co-relation 16669. Up to 767 conditions per place. [2021-12-06 22:36:05,269 INFO L132 encePairwiseOnDemand]: 238/273 looper letters, 166 selfloop transitions, 46 changer transitions 197/529 dead transitions. [2021-12-06 22:36:05,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 529 transitions, 4245 flow [2021-12-06 22:36:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 22:36:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-12-06 22:36:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 6623 transitions. [2021-12-06 22:36:05,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5054181929181929 [2021-12-06 22:36:05,273 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 6623 transitions. [2021-12-06 22:36:05,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 6623 transitions. [2021-12-06 22:36:05,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:36:05,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 6623 transitions. [2021-12-06 22:36:05,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 137.97916666666666) internal successors, (6623), 48 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:05,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 273.0) internal successors, (13377), 49 states have internal predecessors, (13377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:05,291 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 273.0) internal successors, (13377), 49 states have internal predecessors, (13377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:05,291 INFO L186 Difference]: Start difference. First operand has 545 places, 337 transitions, 1934 flow. Second operand 48 states and 6623 transitions. [2021-12-06 22:36:05,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 529 transitions, 4245 flow [2021-12-06 22:36:05,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 529 transitions, 3706 flow, removed 214 selfloop flow, removed 48 redundant places. [2021-12-06 22:36:05,332 INFO L242 Difference]: Finished difference. Result has 455 places, 297 transitions, 1446 flow [2021-12-06 22:36:05,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1446, PETRI_PLACES=455, PETRI_TRANSITIONS=297} [2021-12-06 22:36:05,333 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 213 predicate places. [2021-12-06 22:36:05,333 INFO L470 AbstractCegarLoop]: Abstraction has has 455 places, 297 transitions, 1446 flow [2021-12-06 22:36:05,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 137.5090909090909) internal successors, (7563), 55 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:05,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:36:05,334 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:36:05,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 22:36:05,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:36:05,536 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:36:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:36:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2088370623, now seen corresponding path program 9 times [2021-12-06 22:36:05,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:36:05,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815675401] [2021-12-06 22:36:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:36:05,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:36:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:36:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 222 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 22:36:06,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:36:06,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815675401] [2021-12-06 22:36:06,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815675401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:36:06,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452739717] [2021-12-06 22:36:06,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:36:06,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:36:06,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:36:06,550 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:36:06,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 22:36:06,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 22:36:06,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:36:06,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 22:36:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:36:07,331 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 22:36:07,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 20 [2021-12-06 22:36:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-12-06 22:36:07,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:36:07,495 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:36:07,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 22:36:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-06 22:36:08,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452739717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:36:08,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:36:08,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 8, 9] total 43 [2021-12-06 22:36:08,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540017070] [2021-12-06 22:36:08,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:36:08,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 22:36:08,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:36:08,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 22:36:08,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 22:36:08,075 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2021-12-06 22:36:08,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 297 transitions, 1446 flow. Second operand has 43 states, 43 states have (on average 139.25581395348837) internal successors, (5988), 43 states have internal predecessors, (5988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:08,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:36:08,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2021-12-06 22:36:08,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:36:12,765 INFO L129 PetriNetUnfolder]: 732/5177 cut-off events. [2021-12-06 22:36:12,765 INFO L130 PetriNetUnfolder]: For 10918/11146 co-relation queries the response was YES. [2021-12-06 22:36:12,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12170 conditions, 5177 events. 732/5177 cut-off events. For 10918/11146 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 45236 event pairs, 266 based on Foata normal form. 10/4619 useless extension candidates. Maximal degree in co-relation 12085. Up to 747 conditions per place. [2021-12-06 22:36:12,830 INFO L132 encePairwiseOnDemand]: 225/273 looper letters, 331 selfloop transitions, 113 changer transitions 43/607 dead transitions. [2021-12-06 22:36:12,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 607 transitions, 4518 flow [2021-12-06 22:36:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-06 22:36:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-12-06 22:36:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 12904 transitions. [2021-12-06 22:36:12,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.49755157123578175 [2021-12-06 22:36:12,838 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 12904 transitions. [2021-12-06 22:36:12,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 12904 transitions. [2021-12-06 22:36:12,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:36:12,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 12904 transitions. [2021-12-06 22:36:12,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 135.83157894736843) internal successors, (12904), 95 states have internal predecessors, (12904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:12,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 273.0) internal successors, (26208), 96 states have internal predecessors, (26208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:12,862 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 273.0) internal successors, (26208), 96 states have internal predecessors, (26208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:12,862 INFO L186 Difference]: Start difference. First operand has 455 places, 297 transitions, 1446 flow. Second operand 95 states and 12904 transitions. [2021-12-06 22:36:12,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 607 transitions, 4518 flow [2021-12-06 22:36:12,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 607 transitions, 3889 flow, removed 195 selfloop flow, removed 56 redundant places. [2021-12-06 22:36:12,888 INFO L242 Difference]: Finished difference. Result has 483 places, 361 transitions, 2169 flow [2021-12-06 22:36:12,889 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=2169, PETRI_PLACES=483, PETRI_TRANSITIONS=361} [2021-12-06 22:36:12,889 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 241 predicate places. [2021-12-06 22:36:12,889 INFO L470 AbstractCegarLoop]: Abstraction has has 483 places, 361 transitions, 2169 flow [2021-12-06 22:36:12,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 139.25581395348837) internal successors, (5988), 43 states have internal predecessors, (5988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:12,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:36:12,890 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:36:12,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 22:36:13,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:36:13,092 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 22:36:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:36:13,094 INFO L85 PathProgramCache]: Analyzing trace with hash 832671479, now seen corresponding path program 10 times [2021-12-06 22:36:13,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:36:13,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886857318] [2021-12-06 22:36:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:36:13,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:36:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:36:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 3 proven. 219 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 22:36:14,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:36:14,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886857318] [2021-12-06 22:36:14,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886857318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:36:14,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840219162] [2021-12-06 22:36:14,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:36:14,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:36:14,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:36:14,123 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:36:14,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 22:36:14,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:36:14,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:36:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 22:36:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:36:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-06 22:36:14,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:36:14,794 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 22:36:14,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 22:36:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-06 22:36:15,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840219162] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:36:15,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:36:15,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 9, 8] total 39 [2021-12-06 22:36:15,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683338377] [2021-12-06 22:36:15,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:36:15,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 22:36:15,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:36:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 22:36:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 22:36:15,105 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2021-12-06 22:36:15,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 361 transitions, 2169 flow. Second operand has 39 states, 39 states have (on average 137.71794871794873) internal successors, (5371), 39 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:15,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:36:15,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2021-12-06 22:36:15,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:36:20,273 INFO L129 PetriNetUnfolder]: 788/5785 cut-off events. [2021-12-06 22:36:20,273 INFO L130 PetriNetUnfolder]: For 21415/21718 co-relation queries the response was YES. [2021-12-06 22:36:20,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14642 conditions, 5785 events. 788/5785 cut-off events. For 21415/21718 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 53481 event pairs, 301 based on Foata normal form. 12/5158 useless extension candidates. Maximal degree in co-relation 14552. Up to 371 conditions per place. [2021-12-06 22:36:20,346 INFO L132 encePairwiseOnDemand]: 230/273 looper letters, 0 selfloop transitions, 0 changer transitions 610/610 dead transitions. [2021-12-06 22:36:20,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 610 transitions, 4870 flow [2021-12-06 22:36:20,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-06 22:36:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-12-06 22:36:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 12755 transitions. [2021-12-06 22:36:20,352 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4970384225703375 [2021-12-06 22:36:20,352 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 12755 transitions. [2021-12-06 22:36:20,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 12755 transitions. [2021-12-06 22:36:20,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:36:20,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 12755 transitions. [2021-12-06 22:36:20,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 135.69148936170214) internal successors, (12755), 94 states have internal predecessors, (12755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:20,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 273.0) internal successors, (25935), 95 states have internal predecessors, (25935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:20,375 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 273.0) internal successors, (25935), 95 states have internal predecessors, (25935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:20,375 INFO L186 Difference]: Start difference. First operand has 483 places, 361 transitions, 2169 flow. Second operand 94 states and 12755 transitions. [2021-12-06 22:36:20,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 610 transitions, 4870 flow [2021-12-06 22:36:20,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 610 transitions, 4611 flow, removed 74 selfloop flow, removed 41 redundant places. [2021-12-06 22:36:20,412 INFO L242 Difference]: Finished difference. Result has 528 places, 0 transitions, 0 flow [2021-12-06 22:36:20,412 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=0, PETRI_PLACES=528, PETRI_TRANSITIONS=0} [2021-12-06 22:36:20,412 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 286 predicate places. [2021-12-06 22:36:20,412 INFO L470 AbstractCegarLoop]: Abstraction has has 528 places, 0 transitions, 0 flow [2021-12-06 22:36:20,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 137.71794871794873) internal successors, (5371), 39 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:36:20,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-06 22:36:20,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2021-12-06 22:36:20,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2021-12-06 22:36:20,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2021-12-06 22:36:20,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 22:36:20,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 22:36:20,625 INFO L732 BasicCegarLoop]: Path program histogram: [10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:36:20,631 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-06 22:36:20,631 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 22:36:20,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 10:36:20 BasicIcfg [2021-12-06 22:36:20,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 22:36:20,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 22:36:20,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 22:36:20,634 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 22:36:20,634 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:33:45" (3/4) ... [2021-12-06 22:36:20,636 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 22:36:20,640 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-06 22:36:20,640 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-06 22:36:20,640 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-12-06 22:36:20,645 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 31 nodes and edges [2021-12-06 22:36:20,646 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-06 22:36:20,646 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 22:36:20,646 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 22:36:20,681 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 22:36:20,681 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 22:36:20,682 INFO L158 Benchmark]: Toolchain (without parser) took 155555.66ms. Allocated memory was 113.2MB in the beginning and 4.9GB in the end (delta: 4.8GB). Free memory was 77.0MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2021-12-06 22:36:20,682 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 93.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 22:36:20,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.78ms. Allocated memory is still 113.2MB. Free memory was 76.8MB in the beginning and 86.4MB in the end (delta: -9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 22:36:20,682 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.03ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 83.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:36:20,682 INFO L158 Benchmark]: Boogie Preprocessor took 29.67ms. Allocated memory is still 113.2MB. Free memory was 83.8MB in the beginning and 81.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:36:20,683 INFO L158 Benchmark]: RCFGBuilder took 529.49ms. Allocated memory is still 113.2MB. Free memory was 81.8MB in the beginning and 45.6MB in the end (delta: 36.1MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2021-12-06 22:36:20,683 INFO L158 Benchmark]: TraceAbstraction took 154684.26ms. Allocated memory was 113.2MB in the beginning and 4.9GB in the end (delta: 4.8GB). Free memory was 45.1MB in the beginning and 3.3GB in the end (delta: -3.3GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2021-12-06 22:36:20,683 INFO L158 Benchmark]: Witness Printer took 47.30ms. Allocated memory is still 4.9GB. Free memory was 3.3GB in the beginning and 3.3GB in the end (delta: 5.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 22:36:20,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 93.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.78ms. Allocated memory is still 113.2MB. Free memory was 76.8MB in the beginning and 86.4MB in the end (delta: -9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.03ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 83.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.67ms. Allocated memory is still 113.2MB. Free memory was 83.8MB in the beginning and 81.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 529.49ms. Allocated memory is still 113.2MB. Free memory was 81.8MB in the beginning and 45.6MB in the end (delta: 36.1MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * TraceAbstraction took 154684.26ms. Allocated memory was 113.2MB in the beginning and 4.9GB in the end (delta: 4.8GB). Free memory was 45.1MB in the beginning and 3.3GB in the end (delta: -3.3GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. * Witness Printer took 47.30ms. Allocated memory is still 4.9GB. Free memory was 3.3GB in the beginning and 3.3GB in the end (delta: 5.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 162]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 284 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 154.6s, OverallIterations: 33, TraceHistogramMax: 8, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 114.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17631 SdHoareTripleChecker+Valid, 10.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17631 mSDsluCounter, 19463 SdHoareTripleChecker+Invalid, 8.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1963 IncrementalHoareTripleChecker+Unchecked, 24505 mSDsCounter, 1292 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22284 IncrementalHoareTripleChecker+Invalid, 25539 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1292 mSolverCounterUnsat, 1342 mSDtfsCounter, 22284 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10743 GetRequests, 9416 SyntacticMatches, 14 SemanticMatches, 1313 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 36823 ImplicationChecksByTransitivity, 25.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5034occurred in iteration=26, InterpolantAutomatonStates: 887, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 30.6s InterpolantComputationTime, 12978 NumberOfCodeBlocks, 12881 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 17501 ConstructedInterpolants, 251 QuantifiedInterpolants, 134024 SizeOfPredicates, 291 NumberOfNonLiveVariables, 11752 ConjunctsInSsa, 426 ConjunctsInUnsatCore, 69 InterpolantComputations, 16 PerfectInterpolantSequences, 3570/5622 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-06 22:36:20,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc483c9-25b3-416e-b7aa-2e4fba81048b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE