./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY --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 b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:47:21,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:47:21,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:47:21,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:47:21,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:47:21,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:47:21,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:47:21,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:47:21,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:47:21,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:47:21,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:47:21,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:47:21,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:47:21,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:47:21,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:47:21,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:47:21,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:47:21,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:47:21,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:47:21,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:47:21,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:47:21,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:47:21,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:47:21,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:47:21,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:47:21,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:47:21,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:47:21,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:47:21,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:47:21,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:47:21,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:47:21,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:47:21,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:47:21,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:47:21,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:47:21,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:47:21,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:47:21,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:47:21,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:47:21,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:47:21,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:47:21,462 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:47:21,518 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:47:21,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:47:21,520 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:47:21,520 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:47:21,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:47:21,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:47:21,530 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:47:21,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:47:21,530 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:47:21,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:47:21,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:47:21,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:47:21,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:47:21,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:47:21,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:47:21,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:47:21,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:47:21,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:47:21,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:47:21,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:47:21,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:47:21,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:47:21,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:47:21,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:47:21,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:47:21,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:47:21,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:47:21,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:47:21,535 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:47:21,536 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:47:21,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:47:21,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:47:21,536 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_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd [2021-11-07 07:47:21,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:47:21,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:47:21,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:47:21,947 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:47:21,948 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:47:21,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/pthread/triangular-1.i [2021-11-07 07:47:22,030 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/data/67b01fb48/1c7611be9e764850a714b90dbf061bd2/FLAG2da597a07 [2021-11-07 07:47:22,526 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:47:22,527 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/sv-benchmarks/c/pthread/triangular-1.i [2021-11-07 07:47:22,556 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/data/67b01fb48/1c7611be9e764850a714b90dbf061bd2/FLAG2da597a07 [2021-11-07 07:47:22,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/data/67b01fb48/1c7611be9e764850a714b90dbf061bd2 [2021-11-07 07:47:22,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:47:22,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:47:22,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:47:22,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:47:22,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:47:22,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:47:22" (1/1) ... [2021-11-07 07:47:22,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e449da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:22, skipping insertion in model container [2021-11-07 07:47:22,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:47:22" (1/1) ... [2021-11-07 07:47:22,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:47:22,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:47:23,327 WARN L228 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_37ff57d5-4313-4821-be7b-c8985a52d247/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2021-11-07 07:47:23,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:47:23,360 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:47:23,459 WARN L228 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_37ff57d5-4313-4821-be7b-c8985a52d247/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2021-11-07 07:47:23,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:47:23,528 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:47:23,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23 WrapperNode [2021-11-07 07:47:23,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:47:23,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:47:23,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:47:23,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:47:23,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:47:23,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:47:23,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:47:23,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:47:23,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:47:23,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:47:23,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:47:23,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:47:23,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (1/1) ... [2021-11-07 07:47:23,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:47:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:23,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:47:23,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:47:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-07 07:47:23,738 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-07 07:47:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-07 07:47:23,738 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-07 07:47:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:47:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 07:47:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:47:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:47:23,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:47:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 07:47:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:47:23,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:47:23,742 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 07:47:24,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:47:24,114 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-07 07:47:24,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:47:24 BoogieIcfgContainer [2021-11-07 07:47:24,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:47:24,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:47:24,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:47:24,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:47:24,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:47:22" (1/3) ... [2021-11-07 07:47:24,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb6bd85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:47:24, skipping insertion in model container [2021-11-07 07:47:24,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:47:23" (2/3) ... [2021-11-07 07:47:24,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb6bd85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:47:24, skipping insertion in model container [2021-11-07 07:47:24,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:47:24" (3/3) ... [2021-11-07 07:47:24,142 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-11-07 07:47:24,150 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 07:47:24,151 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:47:24,151 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:47:24,151 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 07:47:24,191 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,192 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,192 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,193 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,193 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,193 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,194 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,194 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,194 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,195 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,195 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,196 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,196 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,196 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,197 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,197 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,197 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,198 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,198 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,199 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,199 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,199 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,200 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,200 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,200 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,200 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,201 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,201 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,202 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,202 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,202 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,202 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,203 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,203 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,203 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,203 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,204 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,204 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,204 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,205 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,205 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,205 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,206 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,206 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,206 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,206 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,207 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,207 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,207 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,208 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,208 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,208 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,208 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,209 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,209 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,209 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,213 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,214 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,214 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,214 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,214 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,215 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,220 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,221 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,221 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,221 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,222 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,222 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 07:47:24,224 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-07 07:47:24,283 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:47:24,291 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 [2021-11-07 07:47:24,291 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 07:47:24,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-11-07 07:47:24,346 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-11-07 07:47:24,347 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 07:47:24,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-11-07 07:47:24,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2021-11-07 07:47:24,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2021-11-07 07:47:24,375 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2021-11-07 07:47:24,376 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 07:47:24,376 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:24,377 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] [2021-11-07 07:47:24,377 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:24,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-11-07 07:47:24,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:24,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954454697] [2021-11-07 07:47:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:24,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:24,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:24,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954454697] [2021-11-07 07:47:24,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954454697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:24,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:24,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:47:24,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882378660] [2021-11-07 07:47:24,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:47:24,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:24,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:47:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:47:24,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:25,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:25,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:25,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:25,168 INFO L129 PetriNetUnfolder]: 44/194 cut-off events. [2021-11-07 07:47:25,168 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 07:47:25,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 194 events. 44/194 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 723 event pairs, 3 based on Foata normal form. 47/223 useless extension candidates. Maximal degree in co-relation 243. Up to 29 conditions per place. [2021-11-07 07:47:25,174 INFO L132 encePairwiseOnDemand]: 55/66 looper letters, 11 selfloop transitions, 9 changer transitions 23/87 dead transitions. [2021-11-07 07:47:25,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 252 flow [2021-11-07 07:47:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:47:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-07 07:47:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-11-07 07:47:25,193 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8939393939393939 [2021-11-07 07:47:25,194 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-11-07 07:47:25,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-11-07 07:47:25,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:25,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-11-07 07:47:25,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,220 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,222 INFO L186 Difference]: Start difference. First operand has 66 places, 64 transitions, 134 flow. Second operand 10 states and 590 transitions. [2021-11-07 07:47:25,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 252 flow [2021-11-07 07:47:25,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-07 07:47:25,238 INFO L242 Difference]: Finished difference. Result has 79 places, 61 transitions, 175 flow [2021-11-07 07:47:25,240 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=175, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2021-11-07 07:47:25,241 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2021-11-07 07:47:25,241 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 175 flow [2021-11-07 07:47:25,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,242 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:25,242 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] [2021-11-07 07:47:25,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:47:25,243 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1447548911, now seen corresponding path program 1 times [2021-11-07 07:47:25,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:25,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502709160] [2021-11-07 07:47:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:25,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:25,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:25,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502709160] [2021-11-07 07:47:25,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502709160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:25,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:25,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:47:25,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905437477] [2021-11-07 07:47:25,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:47:25,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:47:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:47:25,421 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:25,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:25,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:25,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:25,613 INFO L129 PetriNetUnfolder]: 25/130 cut-off events. [2021-11-07 07:47:25,614 INFO L130 PetriNetUnfolder]: For 64/72 co-relation queries the response was YES. [2021-11-07 07:47:25,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 130 events. 25/130 cut-off events. For 64/72 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 343 event pairs, 0 based on Foata normal form. 7/124 useless extension candidates. Maximal degree in co-relation 206. Up to 29 conditions per place. [2021-11-07 07:47:25,621 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 13 selfloop transitions, 9 changer transitions 5/71 dead transitions. [2021-11-07 07:47:25,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 271 flow [2021-11-07 07:47:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:47:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-07 07:47:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 394 transitions. [2021-11-07 07:47:25,626 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528138528138528 [2021-11-07 07:47:25,627 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 394 transitions. [2021-11-07 07:47:25,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 394 transitions. [2021-11-07 07:47:25,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:25,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 394 transitions. [2021-11-07 07:47:25,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,648 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,648 INFO L186 Difference]: Start difference. First operand has 79 places, 61 transitions, 175 flow. Second operand 7 states and 394 transitions. [2021-11-07 07:47:25,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 271 flow [2021-11-07 07:47:25,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 263 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-11-07 07:47:25,653 INFO L242 Difference]: Finished difference. Result has 73 places, 64 transitions, 214 flow [2021-11-07 07:47:25,654 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2021-11-07 07:47:25,654 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2021-11-07 07:47:25,655 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 214 flow [2021-11-07 07:47:25,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,655 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:25,655 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] [2021-11-07 07:47:25,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:47:25,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:25,657 INFO L85 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-11-07 07:47:25,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:25,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181314185] [2021-11-07 07:47:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:25,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:25,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:25,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181314185] [2021-11-07 07:47:25,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181314185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:25,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:25,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:47:25,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888639482] [2021-11-07 07:47:25,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:47:25,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:25,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:47:25,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:47:25,846 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:25,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:25,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:25,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:25,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:26,022 INFO L129 PetriNetUnfolder]: 35/182 cut-off events. [2021-11-07 07:47:26,022 INFO L130 PetriNetUnfolder]: For 116/133 co-relation queries the response was YES. [2021-11-07 07:47:26,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 182 events. 35/182 cut-off events. For 116/133 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 584 event pairs, 0 based on Foata normal form. 20/185 useless extension candidates. Maximal degree in co-relation 317. Up to 33 conditions per place. [2021-11-07 07:47:26,028 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 20 selfloop transitions, 11 changer transitions 8/83 dead transitions. [2021-11-07 07:47:26,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 394 flow [2021-11-07 07:47:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:47:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-07 07:47:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 509 transitions. [2021-11-07 07:47:26,034 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8569023569023569 [2021-11-07 07:47:26,038 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 509 transitions. [2021-11-07 07:47:26,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 509 transitions. [2021-11-07 07:47:26,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:26,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 509 transitions. [2021-11-07 07:47:26,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 56.55555555555556) internal successors, (509), 9 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,047 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,048 INFO L186 Difference]: Start difference. First operand has 73 places, 64 transitions, 214 flow. Second operand 9 states and 509 transitions. [2021-11-07 07:47:26,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 394 flow [2021-11-07 07:47:26,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 371 flow, removed 9 selfloop flow, removed 3 redundant places. [2021-11-07 07:47:26,066 INFO L242 Difference]: Finished difference. Result has 83 places, 69 transitions, 283 flow [2021-11-07 07:47:26,066 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2021-11-07 07:47:26,067 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2021-11-07 07:47:26,067 INFO L470 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 283 flow [2021-11-07 07:47:26,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:26,068 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] [2021-11-07 07:47:26,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:47:26,068 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:26,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:26,071 INFO L85 PathProgramCache]: Analyzing trace with hash 482644881, now seen corresponding path program 2 times [2021-11-07 07:47:26,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:26,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060690492] [2021-11-07 07:47:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:26,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:26,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:26,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060690492] [2021-11-07 07:47:26,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060690492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:26,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:26,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:47:26,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391352305] [2021-11-07 07:47:26,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:47:26,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:26,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:47:26,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:47:26,195 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:26,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:26,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:26,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:26,345 INFO L129 PetriNetUnfolder]: 28/171 cut-off events. [2021-11-07 07:47:26,345 INFO L130 PetriNetUnfolder]: For 239/271 co-relation queries the response was YES. [2021-11-07 07:47:26,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 171 events. 28/171 cut-off events. For 239/271 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 551 event pairs, 0 based on Foata normal form. 28/183 useless extension candidates. Maximal degree in co-relation 346. Up to 30 conditions per place. [2021-11-07 07:47:26,348 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 12 changer transitions 11/83 dead transitions. [2021-11-07 07:47:26,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 471 flow [2021-11-07 07:47:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:47:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-07 07:47:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2021-11-07 07:47:26,353 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8468013468013468 [2021-11-07 07:47:26,353 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 503 transitions. [2021-11-07 07:47:26,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 503 transitions. [2021-11-07 07:47:26,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:26,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 503 transitions. [2021-11-07 07:47:26,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 55.888888888888886) internal successors, (503), 9 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,360 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,361 INFO L186 Difference]: Start difference. First operand has 83 places, 69 transitions, 283 flow. Second operand 9 states and 503 transitions. [2021-11-07 07:47:26,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 471 flow [2021-11-07 07:47:26,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 451 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-11-07 07:47:26,376 INFO L242 Difference]: Finished difference. Result has 90 places, 70 transitions, 326 flow [2021-11-07 07:47:26,377 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2021-11-07 07:47:26,377 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2021-11-07 07:47:26,378 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 326 flow [2021-11-07 07:47:26,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,378 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:26,379 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] [2021-11-07 07:47:26,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:47:26,379 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash 557630062, now seen corresponding path program 1 times [2021-11-07 07:47:26,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:26,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857485946] [2021-11-07 07:47:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:26,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:26,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:26,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857485946] [2021-11-07 07:47:26,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857485946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:26,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:26,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:47:26,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581280265] [2021-11-07 07:47:26,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:47:26,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:47:26,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:47:26,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:26,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:26,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:26,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:26,770 INFO L129 PetriNetUnfolder]: 41/214 cut-off events. [2021-11-07 07:47:26,771 INFO L130 PetriNetUnfolder]: For 570/604 co-relation queries the response was YES. [2021-11-07 07:47:26,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 214 events. 41/214 cut-off events. For 570/604 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 0 based on Foata normal form. 20/215 useless extension candidates. Maximal degree in co-relation 506. Up to 48 conditions per place. [2021-11-07 07:47:26,775 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 21 selfloop transitions, 21 changer transitions 8/94 dead transitions. [2021-11-07 07:47:26,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 650 flow [2021-11-07 07:47:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:47:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-07 07:47:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2021-11-07 07:47:26,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539944903581267 [2021-11-07 07:47:26,780 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2021-11-07 07:47:26,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2021-11-07 07:47:26,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:26,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2021-11-07 07:47:26,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,787 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,787 INFO L186 Difference]: Start difference. First operand has 90 places, 70 transitions, 326 flow. Second operand 11 states and 620 transitions. [2021-11-07 07:47:26,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 650 flow [2021-11-07 07:47:26,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 534 flow, removed 45 selfloop flow, removed 10 redundant places. [2021-11-07 07:47:26,799 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 411 flow [2021-11-07 07:47:26,800 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=411, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2021-11-07 07:47:26,800 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 28 predicate places. [2021-11-07 07:47:26,800 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 411 flow [2021-11-07 07:47:26,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,801 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:26,801 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] [2021-11-07 07:47:26,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:47:26,802 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:26,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1889861268, now seen corresponding path program 2 times [2021-11-07 07:47:26,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:26,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937463445] [2021-11-07 07:47:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:26,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:26,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:26,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937463445] [2021-11-07 07:47:26,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937463445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:26,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:26,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:47:26,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213264394] [2021-11-07 07:47:26,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:47:26,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:26,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:47:26,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:47:26,984 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:26,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:26,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:26,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:26,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:27,183 INFO L129 PetriNetUnfolder]: 36/206 cut-off events. [2021-11-07 07:47:27,184 INFO L130 PetriNetUnfolder]: For 803/857 co-relation queries the response was YES. [2021-11-07 07:47:27,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 206 events. 36/206 cut-off events. For 803/857 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 748 event pairs, 0 based on Foata normal form. 29/216 useless extension candidates. Maximal degree in co-relation 550. Up to 44 conditions per place. [2021-11-07 07:47:27,188 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 19 selfloop transitions, 23 changer transitions 11/97 dead transitions. [2021-11-07 07:47:27,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 781 flow [2021-11-07 07:47:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:47:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-07 07:47:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 670 transitions. [2021-11-07 07:47:27,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8459595959595959 [2021-11-07 07:47:27,193 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 670 transitions. [2021-11-07 07:47:27,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 670 transitions. [2021-11-07 07:47:27,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:27,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 670 transitions. [2021-11-07 07:47:27,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 55.833333333333336) internal successors, (670), 12 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:27,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:27,201 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:27,201 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 411 flow. Second operand 12 states and 670 transitions. [2021-11-07 07:47:27,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 781 flow [2021-11-07 07:47:27,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 723 flow, removed 20 selfloop flow, removed 5 redundant places. [2021-11-07 07:47:27,210 INFO L242 Difference]: Finished difference. Result has 103 places, 79 transitions, 499 flow [2021-11-07 07:47:27,210 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=499, PETRI_PLACES=103, PETRI_TRANSITIONS=79} [2021-11-07 07:47:27,211 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 37 predicate places. [2021-11-07 07:47:27,211 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 79 transitions, 499 flow [2021-11-07 07:47:27,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:27,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:27,212 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] [2021-11-07 07:47:27,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:47:27,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:27,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:27,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1339160469, now seen corresponding path program 1 times [2021-11-07 07:47:27,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:27,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661385822] [2021-11-07 07:47:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:27,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:27,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:27,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661385822] [2021-11-07 07:47:27,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661385822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:27,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537112603] [2021-11-07 07:47:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:27,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:27,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:27,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:27,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:47:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:27,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:47:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:27,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537112603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:27,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:27,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 07:47:27,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804698634] [2021-11-07 07:47:27,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:47:27,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:47:27,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:47:27,888 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:27,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 79 transitions, 499 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:27,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:27,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:27,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:28,036 INFO L129 PetriNetUnfolder]: 36/213 cut-off events. [2021-11-07 07:47:28,036 INFO L130 PetriNetUnfolder]: For 1073/1130 co-relation queries the response was YES. [2021-11-07 07:47:28,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 213 events. 36/213 cut-off events. For 1073/1130 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 734 event pairs, 0 based on Foata normal form. 35/227 useless extension candidates. Maximal degree in co-relation 604. Up to 44 conditions per place. [2021-11-07 07:47:28,041 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 13 changer transitions 8/93 dead transitions. [2021-11-07 07:47:28,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 93 transitions, 807 flow [2021-11-07 07:47:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:47:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-07 07:47:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 615 transitions. [2021-11-07 07:47:28,044 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8471074380165289 [2021-11-07 07:47:28,045 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 615 transitions. [2021-11-07 07:47:28,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 615 transitions. [2021-11-07 07:47:28,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:28,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 615 transitions. [2021-11-07 07:47:28,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.90909090909091) internal successors, (615), 11 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:28,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:28,053 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:28,053 INFO L186 Difference]: Start difference. First operand has 103 places, 79 transitions, 499 flow. Second operand 11 states and 615 transitions. [2021-11-07 07:47:28,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 93 transitions, 807 flow [2021-11-07 07:47:28,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 734 flow, removed 19 selfloop flow, removed 9 redundant places. [2021-11-07 07:47:28,064 INFO L242 Difference]: Finished difference. Result has 106 places, 81 transitions, 514 flow [2021-11-07 07:47:28,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=514, PETRI_PLACES=106, PETRI_TRANSITIONS=81} [2021-11-07 07:47:28,065 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2021-11-07 07:47:28,065 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 81 transitions, 514 flow [2021-11-07 07:47:28,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:28,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:28,066 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] [2021-11-07 07:47:28,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:28,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:28,283 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash 466216687, now seen corresponding path program 2 times [2021-11-07 07:47:28,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:28,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486833328] [2021-11-07 07:47:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:28,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:28,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:28,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486833328] [2021-11-07 07:47:28,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486833328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:28,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205441347] [2021-11-07 07:47:28,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:47:28,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:28,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:28,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:28,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:47:28,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:47:28,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:47:28,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:28,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205441347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:28,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:28,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-07 07:47:28,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084662153] [2021-11-07 07:47:28,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:47:28,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:28,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:47:28,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:47:28,846 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:28,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 81 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:28,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:28,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:28,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:29,052 INFO L129 PetriNetUnfolder]: 42/245 cut-off events. [2021-11-07 07:47:29,052 INFO L130 PetriNetUnfolder]: For 1540/1608 co-relation queries the response was YES. [2021-11-07 07:47:29,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 245 events. 42/245 cut-off events. For 1540/1608 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 964 event pairs, 0 based on Foata normal form. 35/256 useless extension candidates. Maximal degree in co-relation 748. Up to 54 conditions per place. [2021-11-07 07:47:29,060 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 21 changer transitions 8/101 dead transitions. [2021-11-07 07:47:29,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 101 transitions, 952 flow [2021-11-07 07:47:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:47:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-07 07:47:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 782 transitions. [2021-11-07 07:47:29,064 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8463203463203464 [2021-11-07 07:47:29,065 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 782 transitions. [2021-11-07 07:47:29,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 782 transitions. [2021-11-07 07:47:29,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:29,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 782 transitions. [2021-11-07 07:47:29,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.857142857142854) internal successors, (782), 14 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,073 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,073 INFO L186 Difference]: Start difference. First operand has 106 places, 81 transitions, 514 flow. Second operand 14 states and 782 transitions. [2021-11-07 07:47:29,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 101 transitions, 952 flow [2021-11-07 07:47:29,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 101 transitions, 858 flow, removed 36 selfloop flow, removed 8 redundant places. [2021-11-07 07:47:29,087 INFO L242 Difference]: Finished difference. Result has 115 places, 88 transitions, 629 flow [2021-11-07 07:47:29,088 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=629, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2021-11-07 07:47:29,088 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 49 predicate places. [2021-11-07 07:47:29,088 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 629 flow [2021-11-07 07:47:29,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,089 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:29,089 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] [2021-11-07 07:47:29,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 07:47:29,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:29,303 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:29,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1190358857, now seen corresponding path program 3 times [2021-11-07 07:47:29,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:29,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452938230] [2021-11-07 07:47:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:29,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:29,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:29,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452938230] [2021-11-07 07:47:29,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452938230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:29,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849998868] [2021-11-07 07:47:29,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:47:29,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:29,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:29,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:29,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:47:29,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 07:47:29,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:29,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:47:29,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:29,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849998868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:29,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:29,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 07:47:29,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476394683] [2021-11-07 07:47:29,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:47:29,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:29,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:47:29,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:47:29,698 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:29,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 629 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:29,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:29,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:29,945 INFO L129 PetriNetUnfolder]: 57/320 cut-off events. [2021-11-07 07:47:29,945 INFO L130 PetriNetUnfolder]: For 2724/2816 co-relation queries the response was YES. [2021-11-07 07:47:29,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 320 events. 57/320 cut-off events. For 2724/2816 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1464 event pairs, 0 based on Foata normal form. 40/328 useless extension candidates. Maximal degree in co-relation 1112. Up to 74 conditions per place. [2021-11-07 07:47:29,953 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 34 selfloop transitions, 26 changer transitions 8/112 dead transitions. [2021-11-07 07:47:29,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 112 transitions, 1217 flow [2021-11-07 07:47:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:47:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-07 07:47:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 842 transitions. [2021-11-07 07:47:29,958 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8505050505050505 [2021-11-07 07:47:29,959 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 842 transitions. [2021-11-07 07:47:29,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 842 transitions. [2021-11-07 07:47:29,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:29,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 842 transitions. [2021-11-07 07:47:29,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 56.13333333333333) internal successors, (842), 15 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,969 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,969 INFO L186 Difference]: Start difference. First operand has 115 places, 88 transitions, 629 flow. Second operand 15 states and 842 transitions. [2021-11-07 07:47:29,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 112 transitions, 1217 flow [2021-11-07 07:47:29,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 112 transitions, 1085 flow, removed 60 selfloop flow, removed 6 redundant places. [2021-11-07 07:47:29,993 INFO L242 Difference]: Finished difference. Result has 127 places, 94 transitions, 765 flow [2021-11-07 07:47:29,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=765, PETRI_PLACES=127, PETRI_TRANSITIONS=94} [2021-11-07 07:47:29,994 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 61 predicate places. [2021-11-07 07:47:29,994 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 94 transitions, 765 flow [2021-11-07 07:47:29,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,995 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:29,995 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] [2021-11-07 07:47:30,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:30,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:30,213 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:30,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:30,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2019400091, now seen corresponding path program 4 times [2021-11-07 07:47:30,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:30,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765975853] [2021-11-07 07:47:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:30,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:30,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:30,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765975853] [2021-11-07 07:47:30,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765975853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:30,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900128408] [2021-11-07 07:47:30,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:47:30,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:30,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:30,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:30,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:47:30,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:47:30,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:30,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:47:30,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:30,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900128408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:30,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:30,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-07 07:47:30,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740325716] [2021-11-07 07:47:30,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:47:30,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:47:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:47:30,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:30,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 94 transitions, 765 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:30,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:30,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:30,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:31,063 INFO L129 PetriNetUnfolder]: 58/343 cut-off events. [2021-11-07 07:47:31,063 INFO L130 PetriNetUnfolder]: For 3986/4075 co-relation queries the response was YES. [2021-11-07 07:47:31,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 343 events. 58/343 cut-off events. For 3986/4075 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1641 event pairs, 0 based on Foata normal form. 47/356 useless extension candidates. Maximal degree in co-relation 1287. Up to 76 conditions per place. [2021-11-07 07:47:31,071 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 30 selfloop transitions, 34 changer transitions 17/125 dead transitions. [2021-11-07 07:47:31,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 125 transitions, 1651 flow [2021-11-07 07:47:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:47:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-07 07:47:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1116 transitions. [2021-11-07 07:47:31,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8454545454545455 [2021-11-07 07:47:31,076 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1116 transitions. [2021-11-07 07:47:31,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1116 transitions. [2021-11-07 07:47:31,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:31,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1116 transitions. [2021-11-07 07:47:31,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:31,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:31,087 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:31,087 INFO L186 Difference]: Start difference. First operand has 127 places, 94 transitions, 765 flow. Second operand 20 states and 1116 transitions. [2021-11-07 07:47:31,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 125 transitions, 1651 flow [2021-11-07 07:47:31,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 125 transitions, 1431 flow, removed 93 selfloop flow, removed 10 redundant places. [2021-11-07 07:47:31,109 INFO L242 Difference]: Finished difference. Result has 143 places, 103 transitions, 975 flow [2021-11-07 07:47:31,109 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=975, PETRI_PLACES=143, PETRI_TRANSITIONS=103} [2021-11-07 07:47:31,109 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 77 predicate places. [2021-11-07 07:47:31,110 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 103 transitions, 975 flow [2021-11-07 07:47:31,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:31,110 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:31,111 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] [2021-11-07 07:47:31,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:31,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:47:31,326 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1615124285, now seen corresponding path program 1 times [2021-11-07 07:47:31,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:31,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225344639] [2021-11-07 07:47:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:31,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:31,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:31,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225344639] [2021-11-07 07:47:31,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225344639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:31,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476501304] [2021-11-07 07:47:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:31,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:31,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:31,442 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:31,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:47:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:31,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:47:31,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:31,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476501304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:31,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:31,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-11-07 07:47:31,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770683348] [2021-11-07 07:47:31,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:47:31,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:31,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:47:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:47:31,871 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:31,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 103 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:31,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:31,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:31,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:32,067 INFO L129 PetriNetUnfolder]: 54/323 cut-off events. [2021-11-07 07:47:32,067 INFO L130 PetriNetUnfolder]: For 4100/4187 co-relation queries the response was YES. [2021-11-07 07:47:32,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 323 events. 54/323 cut-off events. For 4100/4187 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1506 event pairs, 0 based on Foata normal form. 31/322 useless extension candidates. Maximal degree in co-relation 1228. Up to 70 conditions per place. [2021-11-07 07:47:32,075 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 45 selfloop transitions, 25 changer transitions 8/122 dead transitions. [2021-11-07 07:47:32,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 122 transitions, 1613 flow [2021-11-07 07:47:32,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:47:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-07 07:47:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 726 transitions. [2021-11-07 07:47:32,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-11-07 07:47:32,078 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 726 transitions. [2021-11-07 07:47:32,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 726 transitions. [2021-11-07 07:47:32,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:32,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 726 transitions. [2021-11-07 07:47:32,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.84615384615385) internal successors, (726), 13 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:32,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:32,084 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:32,085 INFO L186 Difference]: Start difference. First operand has 143 places, 103 transitions, 975 flow. Second operand 13 states and 726 transitions. [2021-11-07 07:47:32,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 122 transitions, 1613 flow [2021-11-07 07:47:32,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 122 transitions, 1374 flow, removed 105 selfloop flow, removed 13 redundant places. [2021-11-07 07:47:32,110 INFO L242 Difference]: Finished difference. Result has 142 places, 105 transitions, 890 flow [2021-11-07 07:47:32,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=890, PETRI_PLACES=142, PETRI_TRANSITIONS=105} [2021-11-07 07:47:32,111 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 76 predicate places. [2021-11-07 07:47:32,111 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 105 transitions, 890 flow [2021-11-07 07:47:32,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:32,112 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:32,112 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] [2021-11-07 07:47:32,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:32,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:32,339 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash 70257965, now seen corresponding path program 2 times [2021-11-07 07:47:32,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:32,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099500259] [2021-11-07 07:47:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:32,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:32,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:32,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099500259] [2021-11-07 07:47:32,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099500259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:32,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692610329] [2021-11-07 07:47:32,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:47:32,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:32,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:32,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:32,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:47:32,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:47:32,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:32,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:47:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:32,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692610329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:32,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:32,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-11-07 07:47:32,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594518042] [2021-11-07 07:47:32,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:47:32,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:47:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:47:32,864 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:32,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 105 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:32,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:32,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:32,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:33,147 INFO L129 PetriNetUnfolder]: 69/418 cut-off events. [2021-11-07 07:47:33,147 INFO L130 PetriNetUnfolder]: For 5788/5870 co-relation queries the response was YES. [2021-11-07 07:47:33,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1695 conditions, 418 events. 69/418 cut-off events. For 5788/5870 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2172 event pairs, 0 based on Foata normal form. 36/414 useless extension candidates. Maximal degree in co-relation 1621. Up to 78 conditions per place. [2021-11-07 07:47:33,158 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 36 selfloop transitions, 45 changer transitions 8/133 dead transitions. [2021-11-07 07:47:33,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 133 transitions, 1808 flow [2021-11-07 07:47:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:47:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-07 07:47:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 895 transitions. [2021-11-07 07:47:33,161 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8475378787878788 [2021-11-07 07:47:33,161 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 895 transitions. [2021-11-07 07:47:33,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 895 transitions. [2021-11-07 07:47:33,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:33,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 895 transitions. [2021-11-07 07:47:33,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.9375) internal successors, (895), 16 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:33,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:33,169 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:33,169 INFO L186 Difference]: Start difference. First operand has 142 places, 105 transitions, 890 flow. Second operand 16 states and 895 transitions. [2021-11-07 07:47:33,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 133 transitions, 1808 flow [2021-11-07 07:47:33,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 133 transitions, 1634 flow, removed 66 selfloop flow, removed 10 redundant places. [2021-11-07 07:47:33,198 INFO L242 Difference]: Finished difference. Result has 151 places, 111 transitions, 1097 flow [2021-11-07 07:47:33,199 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1097, PETRI_PLACES=151, PETRI_TRANSITIONS=111} [2021-11-07 07:47:33,199 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 85 predicate places. [2021-11-07 07:47:33,200 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 111 transitions, 1097 flow [2021-11-07 07:47:33,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:33,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:33,201 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] [2021-11-07 07:47:33,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:33,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:33,415 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash -245613985, now seen corresponding path program 3 times [2021-11-07 07:47:33,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:33,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029214637] [2021-11-07 07:47:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:33,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:33,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:33,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029214637] [2021-11-07 07:47:33,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029214637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:33,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005072432] [2021-11-07 07:47:33,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:47:33,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:33,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:33,521 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:33,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:47:33,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 07:47:33,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:47:33,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:33,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005072432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:33,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:33,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 07:47:33,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037580807] [2021-11-07 07:47:33,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:47:33,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:33,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:47:33,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:47:33,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:33,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 111 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:33,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:33,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:33,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:34,354 INFO L129 PetriNetUnfolder]: 64/390 cut-off events. [2021-11-07 07:47:34,355 INFO L130 PetriNetUnfolder]: For 6648/6766 co-relation queries the response was YES. [2021-11-07 07:47:34,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 390 events. 64/390 cut-off events. For 6648/6766 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2002 event pairs, 0 based on Foata normal form. 50/402 useless extension candidates. Maximal degree in co-relation 1604. Up to 74 conditions per place. [2021-11-07 07:47:34,365 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 28 selfloop transitions, 53 changer transitions 11/136 dead transitions. [2021-11-07 07:47:34,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 136 transitions, 2053 flow [2021-11-07 07:47:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:47:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-07 07:47:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1003 transitions. [2021-11-07 07:47:34,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442760942760943 [2021-11-07 07:47:34,369 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1003 transitions. [2021-11-07 07:47:34,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1003 transitions. [2021-11-07 07:47:34,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:34,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1003 transitions. [2021-11-07 07:47:34,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.72222222222222) internal successors, (1003), 18 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:34,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:34,382 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:34,383 INFO L186 Difference]: Start difference. First operand has 151 places, 111 transitions, 1097 flow. Second operand 18 states and 1003 transitions. [2021-11-07 07:47:34,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 136 transitions, 2053 flow [2021-11-07 07:47:34,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 136 transitions, 1794 flow, removed 101 selfloop flow, removed 11 redundant places. [2021-11-07 07:47:34,417 INFO L242 Difference]: Finished difference. Result has 160 places, 114 transitions, 1183 flow [2021-11-07 07:47:34,418 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1183, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2021-11-07 07:47:34,418 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 94 predicate places. [2021-11-07 07:47:34,418 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 1183 flow [2021-11-07 07:47:34,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:34,419 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:34,419 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-11-07 07:47:34,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:34,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:47:34,643 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1609128234, now seen corresponding path program 4 times [2021-11-07 07:47:34,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:34,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478988026] [2021-11-07 07:47:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:34,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:34,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:34,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478988026] [2021-11-07 07:47:34,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478988026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:34,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915106319] [2021-11-07 07:47:34,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:47:34,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:34,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:34,816 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:34,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:47:35,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:47:35,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:35,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:47:35,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:35,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915106319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:35,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:35,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 07:47:35,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349638879] [2021-11-07 07:47:35,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:47:35,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:35,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:47:35,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:47:35,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:35,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 1183 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:35,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:35,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:35,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:35,661 INFO L129 PetriNetUnfolder]: 64/404 cut-off events. [2021-11-07 07:47:35,661 INFO L130 PetriNetUnfolder]: For 6256/6339 co-relation queries the response was YES. [2021-11-07 07:47:35,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1697 conditions, 404 events. 64/404 cut-off events. For 6256/6339 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2053 event pairs, 0 based on Foata normal form. 35/399 useless extension candidates. Maximal degree in co-relation 1616. Up to 87 conditions per place. [2021-11-07 07:47:35,670 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 63 selfloop transitions, 15 changer transitions 8/130 dead transitions. [2021-11-07 07:47:35,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 130 transitions, 1837 flow [2021-11-07 07:47:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:47:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-07 07:47:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 725 transitions. [2021-11-07 07:47:35,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.844988344988345 [2021-11-07 07:47:35,673 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 725 transitions. [2021-11-07 07:47:35,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 725 transitions. [2021-11-07 07:47:35,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:35,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 725 transitions. [2021-11-07 07:47:35,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.76923076923077) internal successors, (725), 13 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:35,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:35,681 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:35,681 INFO L186 Difference]: Start difference. First operand has 160 places, 114 transitions, 1183 flow. Second operand 13 states and 725 transitions. [2021-11-07 07:47:35,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 130 transitions, 1837 flow [2021-11-07 07:47:35,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 130 transitions, 1629 flow, removed 51 selfloop flow, removed 18 redundant places. [2021-11-07 07:47:35,710 INFO L242 Difference]: Finished difference. Result has 156 places, 116 transitions, 1121 flow [2021-11-07 07:47:35,711 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1121, PETRI_PLACES=156, PETRI_TRANSITIONS=116} [2021-11-07 07:47:35,711 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 90 predicate places. [2021-11-07 07:47:35,712 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 116 transitions, 1121 flow [2021-11-07 07:47:35,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:35,712 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:35,712 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-11-07 07:47:35,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:35,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:47:35,926 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash 378278894, now seen corresponding path program 5 times [2021-11-07 07:47:35,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:35,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547023714] [2021-11-07 07:47:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:35,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:36,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:36,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547023714] [2021-11-07 07:47:36,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547023714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:36,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308750472] [2021-11-07 07:47:36,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:47:36,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:36,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:36,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:36,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:47:36,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 07:47:36,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:47:36,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:36,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308750472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:36,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:36,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-07 07:47:36,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436144556] [2021-11-07 07:47:36,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:47:36,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:36,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:47:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:47:36,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:36,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 116 transitions, 1121 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:36,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:36,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:36,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:36,971 INFO L129 PetriNetUnfolder]: 66/408 cut-off events. [2021-11-07 07:47:36,972 INFO L130 PetriNetUnfolder]: For 7029/7131 co-relation queries the response was YES. [2021-11-07 07:47:36,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 408 events. 66/408 cut-off events. For 7029/7131 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2119 event pairs, 0 based on Foata normal form. 37/404 useless extension candidates. Maximal degree in co-relation 1666. Up to 76 conditions per place. [2021-11-07 07:47:36,981 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 56 selfloop transitions, 25 changer transitions 8/133 dead transitions. [2021-11-07 07:47:36,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 133 transitions, 1839 flow [2021-11-07 07:47:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:47:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-07 07:47:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-11-07 07:47:36,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-07 07:47:36,984 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-11-07 07:47:36,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-11-07 07:47:36,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:36,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-11-07 07:47:36,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:36,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:36,992 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:36,992 INFO L186 Difference]: Start difference. First operand has 156 places, 116 transitions, 1121 flow. Second operand 16 states and 892 transitions. [2021-11-07 07:47:36,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 133 transitions, 1839 flow [2021-11-07 07:47:37,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 133 transitions, 1631 flow, removed 91 selfloop flow, removed 10 redundant places. [2021-11-07 07:47:37,022 INFO L242 Difference]: Finished difference. Result has 163 places, 118 transitions, 1153 flow [2021-11-07 07:47:37,023 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1153, PETRI_PLACES=163, PETRI_TRANSITIONS=118} [2021-11-07 07:47:37,024 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 97 predicate places. [2021-11-07 07:47:37,024 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 118 transitions, 1153 flow [2021-11-07 07:47:37,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:37,024 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:37,025 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-11-07 07:47:37,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:37,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:47:37,247 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash 25133018, now seen corresponding path program 6 times [2021-11-07 07:47:37,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:37,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940250106] [2021-11-07 07:47:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:37,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:37,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:37,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940250106] [2021-11-07 07:47:37,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940250106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:37,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322357161] [2021-11-07 07:47:37,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:47:37,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:37,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:37,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:37,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:47:37,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 07:47:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:37,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:47:37,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:38,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322357161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:38,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:38,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 07:47:38,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435519372] [2021-11-07 07:47:38,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:47:38,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:47:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:47:38,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:38,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 118 transitions, 1153 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:38,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:38,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:38,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:38,366 INFO L129 PetriNetUnfolder]: 68/433 cut-off events. [2021-11-07 07:47:38,366 INFO L130 PetriNetUnfolder]: For 6313/6393 co-relation queries the response was YES. [2021-11-07 07:47:38,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 433 events. 68/433 cut-off events. For 6313/6393 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2311 event pairs, 0 based on Foata normal form. 40/429 useless extension candidates. Maximal degree in co-relation 1678. Up to 80 conditions per place. [2021-11-07 07:47:38,378 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 50 selfloop transitions, 32 changer transitions 8/134 dead transitions. [2021-11-07 07:47:38,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 134 transitions, 1819 flow [2021-11-07 07:47:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:47:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-07 07:47:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 948 transitions. [2021-11-07 07:47:38,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8449197860962567 [2021-11-07 07:47:38,382 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 948 transitions. [2021-11-07 07:47:38,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 948 transitions. [2021-11-07 07:47:38,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:38,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 948 transitions. [2021-11-07 07:47:38,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:38,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:38,390 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:38,390 INFO L186 Difference]: Start difference. First operand has 163 places, 118 transitions, 1153 flow. Second operand 17 states and 948 transitions. [2021-11-07 07:47:38,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 134 transitions, 1819 flow [2021-11-07 07:47:38,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 134 transitions, 1661 flow, removed 58 selfloop flow, removed 13 redundant places. [2021-11-07 07:47:38,424 INFO L242 Difference]: Finished difference. Result has 168 places, 120 transitions, 1205 flow [2021-11-07 07:47:38,424 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1205, PETRI_PLACES=168, PETRI_TRANSITIONS=120} [2021-11-07 07:47:38,424 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 102 predicate places. [2021-11-07 07:47:38,425 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 120 transitions, 1205 flow [2021-11-07 07:47:38,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:38,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:38,426 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-11-07 07:47:38,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:38,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:47:38,639 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:38,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1341298320, now seen corresponding path program 7 times [2021-11-07 07:47:38,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:38,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932546798] [2021-11-07 07:47:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:38,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:38,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:38,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932546798] [2021-11-07 07:47:38,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932546798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:38,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272615219] [2021-11-07 07:47:38,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:47:38,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:38,783 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:38,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:47:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:39,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:47:39,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:39,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272615219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:39,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:39,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-07 07:47:39,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368235692] [2021-11-07 07:47:39,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:47:39,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:47:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:47:39,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:39,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 120 transitions, 1205 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:39,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:39,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:39,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:39,743 INFO L129 PetriNetUnfolder]: 77/492 cut-off events. [2021-11-07 07:47:39,743 INFO L130 PetriNetUnfolder]: For 7370/7456 co-relation queries the response was YES. [2021-11-07 07:47:39,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 492 events. 77/492 cut-off events. For 7370/7456 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2815 event pairs, 0 based on Foata normal form. 43/485 useless extension candidates. Maximal degree in co-relation 1938. Up to 96 conditions per place. [2021-11-07 07:47:39,756 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 41 selfloop transitions, 52 changer transitions 8/145 dead transitions. [2021-11-07 07:47:39,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 145 transitions, 2051 flow [2021-11-07 07:47:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:47:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-07 07:47:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1057 transitions. [2021-11-07 07:47:39,759 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429027113237639 [2021-11-07 07:47:39,760 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1057 transitions. [2021-11-07 07:47:39,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1057 transitions. [2021-11-07 07:47:39,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:39,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1057 transitions. [2021-11-07 07:47:39,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:39,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:39,769 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:39,769 INFO L186 Difference]: Start difference. First operand has 168 places, 120 transitions, 1205 flow. Second operand 19 states and 1057 transitions. [2021-11-07 07:47:39,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 145 transitions, 2051 flow [2021-11-07 07:47:39,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 145 transitions, 1881 flow, removed 59 selfloop flow, removed 14 redundant places. [2021-11-07 07:47:39,806 INFO L242 Difference]: Finished difference. Result has 176 places, 130 transitions, 1454 flow [2021-11-07 07:47:39,807 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1454, PETRI_PLACES=176, PETRI_TRANSITIONS=130} [2021-11-07 07:47:39,808 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 110 predicate places. [2021-11-07 07:47:39,808 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 130 transitions, 1454 flow [2021-11-07 07:47:39,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:39,809 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:39,809 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-11-07 07:47:39,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:40,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:47:40,035 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -863268282, now seen corresponding path program 8 times [2021-11-07 07:47:40,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:40,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806068257] [2021-11-07 07:47:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:40,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:40,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:40,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806068257] [2021-11-07 07:47:40,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806068257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:40,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718029978] [2021-11-07 07:47:40,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:47:40,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:40,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:40,143 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:40,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:47:40,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:47:40,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:40,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:47:40,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:40,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718029978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:40,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:40,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-07 07:47:40,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454899954] [2021-11-07 07:47:40,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:47:40,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:47:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:47:40,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:40,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 130 transitions, 1454 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:40,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:40,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:40,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:41,107 INFO L129 PetriNetUnfolder]: 94/577 cut-off events. [2021-11-07 07:47:41,107 INFO L130 PetriNetUnfolder]: For 10181/10302 co-relation queries the response was YES. [2021-11-07 07:47:41,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 577 events. 94/577 cut-off events. For 10181/10302 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3495 event pairs, 0 based on Foata normal form. 51/570 useless extension candidates. Maximal degree in co-relation 2499. Up to 120 conditions per place. [2021-11-07 07:47:41,124 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 70 changer transitions 14/168 dead transitions. [2021-11-07 07:47:41,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 168 transitions, 2803 flow [2021-11-07 07:47:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:47:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-07 07:47:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1338 transitions. [2021-11-07 07:47:41,128 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-07 07:47:41,128 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1338 transitions. [2021-11-07 07:47:41,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1338 transitions. [2021-11-07 07:47:41,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:41,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1338 transitions. [2021-11-07 07:47:41,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:41,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:41,138 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:41,139 INFO L186 Difference]: Start difference. First operand has 176 places, 130 transitions, 1454 flow. Second operand 24 states and 1338 transitions. [2021-11-07 07:47:41,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 168 transitions, 2803 flow [2021-11-07 07:47:41,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 2603 flow, removed 81 selfloop flow, removed 12 redundant places. [2021-11-07 07:47:41,214 INFO L242 Difference]: Finished difference. Result has 195 places, 147 transitions, 1980 flow [2021-11-07 07:47:41,215 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1980, PETRI_PLACES=195, PETRI_TRANSITIONS=147} [2021-11-07 07:47:41,215 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 129 predicate places. [2021-11-07 07:47:41,215 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 147 transitions, 1980 flow [2021-11-07 07:47:41,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:41,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:41,217 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-11-07 07:47:41,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:41,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:47:41,431 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:41,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:41,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1091792612, now seen corresponding path program 9 times [2021-11-07 07:47:41,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:41,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643286765] [2021-11-07 07:47:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:41,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:41,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:41,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643286765] [2021-11-07 07:47:41,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643286765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:41,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318631032] [2021-11-07 07:47:41,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:47:41,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:41,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:41,591 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:41,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:47:42,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 07:47:42,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:42,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:47:42,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:42,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318631032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:42,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:42,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 07:47:42,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427607954] [2021-11-07 07:47:42,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:47:42,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:47:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:47:42,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:42,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 147 transitions, 1980 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:42,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:42,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:42,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:42,735 INFO L129 PetriNetUnfolder]: 92/582 cut-off events. [2021-11-07 07:47:42,735 INFO L130 PetriNetUnfolder]: For 13798/13923 co-relation queries the response was YES. [2021-11-07 07:47:42,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2782 conditions, 582 events. 92/582 cut-off events. For 13798/13923 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3511 event pairs, 0 based on Foata normal form. 33/556 useless extension candidates. Maximal degree in co-relation 2685. Up to 116 conditions per place. [2021-11-07 07:47:42,752 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 86 selfloop transitions, 32 changer transitions 8/170 dead transitions. [2021-11-07 07:47:42,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 170 transitions, 2993 flow [2021-11-07 07:47:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:47:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-07 07:47:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 836 transitions. [2021-11-07 07:47:42,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-11-07 07:47:42,755 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 836 transitions. [2021-11-07 07:47:42,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 836 transitions. [2021-11-07 07:47:42,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:42,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 836 transitions. [2021-11-07 07:47:42,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:42,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:42,761 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:42,761 INFO L186 Difference]: Start difference. First operand has 195 places, 147 transitions, 1980 flow. Second operand 15 states and 836 transitions. [2021-11-07 07:47:42,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 170 transitions, 2993 flow [2021-11-07 07:47:42,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 170 transitions, 2424 flow, removed 240 selfloop flow, removed 20 redundant places. [2021-11-07 07:47:42,826 INFO L242 Difference]: Finished difference. Result has 189 places, 149 transitions, 1707 flow [2021-11-07 07:47:42,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1707, PETRI_PLACES=189, PETRI_TRANSITIONS=149} [2021-11-07 07:47:42,827 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 123 predicate places. [2021-11-07 07:47:42,827 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 149 transitions, 1707 flow [2021-11-07 07:47:42,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:42,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:42,828 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-11-07 07:47:42,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:43,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:43,043 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:43,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1907855234, now seen corresponding path program 10 times [2021-11-07 07:47:43,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:43,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808758536] [2021-11-07 07:47:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:43,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:43,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:43,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808758536] [2021-11-07 07:47:43,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808758536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:43,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011767083] [2021-11-07 07:47:43,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:47:43,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:43,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:43,194 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:43,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:47:43,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:47:43,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:47:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:44,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011767083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:44,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:44,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 07:47:44,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599524167] [2021-11-07 07:47:44,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:47:44,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:47:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:47:44,015 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:44,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 149 transitions, 1707 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:44,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:44,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:44,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:44,375 INFO L129 PetriNetUnfolder]: 94/607 cut-off events. [2021-11-07 07:47:44,375 INFO L130 PetriNetUnfolder]: For 11129/11238 co-relation queries the response was YES. [2021-11-07 07:47:44,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 607 events. 94/607 cut-off events. For 11129/11238 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3718 event pairs, 0 based on Foata normal form. 43/589 useless extension candidates. Maximal degree in co-relation 2477. Up to 108 conditions per place. [2021-11-07 07:47:44,390 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 60 selfloop transitions, 63 changer transitions 8/175 dead transitions. [2021-11-07 07:47:44,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 175 transitions, 2737 flow [2021-11-07 07:47:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:47:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-07 07:47:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1001 transitions. [2021-11-07 07:47:44,394 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-11-07 07:47:44,394 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1001 transitions. [2021-11-07 07:47:44,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1001 transitions. [2021-11-07 07:47:44,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:44,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1001 transitions. [2021-11-07 07:47:44,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.611111111111114) internal successors, (1001), 18 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:44,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:44,406 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:44,406 INFO L186 Difference]: Start difference. First operand has 189 places, 149 transitions, 1707 flow. Second operand 18 states and 1001 transitions. [2021-11-07 07:47:44,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 175 transitions, 2737 flow [2021-11-07 07:47:44,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 175 transitions, 2569 flow, removed 56 selfloop flow, removed 12 redundant places. [2021-11-07 07:47:44,464 INFO L242 Difference]: Finished difference. Result has 196 places, 151 transitions, 1829 flow [2021-11-07 07:47:44,464 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1829, PETRI_PLACES=196, PETRI_TRANSITIONS=151} [2021-11-07 07:47:44,465 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 130 predicate places. [2021-11-07 07:47:44,465 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 151 transitions, 1829 flow [2021-11-07 07:47:44,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:44,465 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:44,466 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-11-07 07:47:44,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:44,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:44,687 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1754475826, now seen corresponding path program 11 times [2021-11-07 07:47:44,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:44,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756980917] [2021-11-07 07:47:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:44,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:44,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:44,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756980917] [2021-11-07 07:47:44,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756980917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:44,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400452656] [2021-11-07 07:47:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:47:44,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:44,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:44,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:47:45,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-07 07:47:45,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:47:45,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:45,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400452656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:45,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:45,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-11-07 07:47:45,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963724753] [2021-11-07 07:47:45,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:47:45,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:45,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:47:45,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:47:45,689 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:45,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 151 transitions, 1829 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:45,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:45,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:45,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:46,125 INFO L129 PetriNetUnfolder]: 97/620 cut-off events. [2021-11-07 07:47:46,125 INFO L130 PetriNetUnfolder]: For 11991/12114 co-relation queries the response was YES. [2021-11-07 07:47:46,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2729 conditions, 620 events. 97/620 cut-off events. For 11991/12114 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3833 event pairs, 0 based on Foata normal form. 54/612 useless extension candidates. Maximal degree in co-relation 2633. Up to 114 conditions per place. [2021-11-07 07:47:46,140 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 45 selfloop transitions, 83 changer transitions 8/180 dead transitions. [2021-11-07 07:47:46,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 180 transitions, 2989 flow [2021-11-07 07:47:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:47:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-07 07:47:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1168 transitions. [2021-11-07 07:47:46,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8427128427128427 [2021-11-07 07:47:46,147 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1168 transitions. [2021-11-07 07:47:46,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1168 transitions. [2021-11-07 07:47:46,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:46,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1168 transitions. [2021-11-07 07:47:46,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.61904761904762) internal successors, (1168), 21 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:46,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:46,155 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:46,155 INFO L186 Difference]: Start difference. First operand has 196 places, 151 transitions, 1829 flow. Second operand 21 states and 1168 transitions. [2021-11-07 07:47:46,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 180 transitions, 2989 flow [2021-11-07 07:47:46,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 180 transitions, 2743 flow, removed 70 selfloop flow, removed 15 redundant places. [2021-11-07 07:47:46,216 INFO L242 Difference]: Finished difference. Result has 204 places, 156 transitions, 2025 flow [2021-11-07 07:47:46,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2025, PETRI_PLACES=204, PETRI_TRANSITIONS=156} [2021-11-07 07:47:46,217 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 138 predicate places. [2021-11-07 07:47:46,217 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 156 transitions, 2025 flow [2021-11-07 07:47:46,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:46,218 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:46,218 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-11-07 07:47:46,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:46,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:47:46,438 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:46,439 INFO L85 PathProgramCache]: Analyzing trace with hash 335924868, now seen corresponding path program 12 times [2021-11-07 07:47:46,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:46,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531396327] [2021-11-07 07:47:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:46,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:46,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:46,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531396327] [2021-11-07 07:47:46,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531396327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:46,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043334126] [2021-11-07 07:47:46,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:47:46,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:46,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:46,590 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:46,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:47:47,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-07 07:47:47,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:47,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:47:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:47,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043334126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:47,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:47,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-11-07 07:47:47,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959503392] [2021-11-07 07:47:47,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:47:47,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:47,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:47:47,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:47:47,321 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:47,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 156 transitions, 2025 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:47,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:47,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:47,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:47,868 INFO L129 PetriNetUnfolder]: 109/689 cut-off events. [2021-11-07 07:47:47,868 INFO L130 PetriNetUnfolder]: For 15371/15481 co-relation queries the response was YES. [2021-11-07 07:47:47,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3234 conditions, 689 events. 109/689 cut-off events. For 15371/15481 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4322 event pairs, 0 based on Foata normal form. 69/690 useless extension candidates. Maximal degree in co-relation 3135. Up to 130 conditions per place. [2021-11-07 07:47:47,887 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 39 selfloop transitions, 100 changer transitions 14/197 dead transitions. [2021-11-07 07:47:47,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 197 transitions, 3746 flow [2021-11-07 07:47:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:47:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-07 07:47:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1449 transitions. [2021-11-07 07:47:47,926 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444055944055944 [2021-11-07 07:47:47,926 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1449 transitions. [2021-11-07 07:47:47,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1449 transitions. [2021-11-07 07:47:47,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:47,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1449 transitions. [2021-11-07 07:47:47,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.73076923076923) internal successors, (1449), 26 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:47,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:47,933 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:47,933 INFO L186 Difference]: Start difference. First operand has 204 places, 156 transitions, 2025 flow. Second operand 26 states and 1449 transitions. [2021-11-07 07:47:47,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 197 transitions, 3746 flow [2021-11-07 07:47:48,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 197 transitions, 3424 flow, removed 96 selfloop flow, removed 17 redundant places. [2021-11-07 07:47:48,007 INFO L242 Difference]: Finished difference. Result has 220 places, 168 transitions, 2440 flow [2021-11-07 07:47:48,007 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2440, PETRI_PLACES=220, PETRI_TRANSITIONS=168} [2021-11-07 07:47:48,008 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 154 predicate places. [2021-11-07 07:47:48,008 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 168 transitions, 2440 flow [2021-11-07 07:47:48,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:48,009 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:48,009 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2021-11-07 07:47:48,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:48,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 07:47:48,222 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:48,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:48,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1777423792, now seen corresponding path program 13 times [2021-11-07 07:47:48,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:48,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911894524] [2021-11-07 07:47:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:48,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:47:48,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:48,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911894524] [2021-11-07 07:47:48,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911894524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:48,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462046023] [2021-11-07 07:47:48,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:47:48,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:48,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:48,343 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:48,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:47:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:47:48,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:47:49,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462046023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:49,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:49,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-11-07 07:47:49,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205314775] [2021-11-07 07:47:49,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:47:49,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:47:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:47:49,124 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:49,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 168 transitions, 2440 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:49,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:49,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:49,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:49,688 INFO L129 PetriNetUnfolder]: 122/762 cut-off events. [2021-11-07 07:47:49,688 INFO L130 PetriNetUnfolder]: For 26429/26580 co-relation queries the response was YES. [2021-11-07 07:47:49,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4068 conditions, 762 events. 122/762 cut-off events. For 26429/26580 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5001 event pairs, 0 based on Foata normal form. 77/764 useless extension candidates. Maximal degree in co-relation 3961. Up to 148 conditions per place. [2021-11-07 07:47:49,713 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 61 selfloop transitions, 89 changer transitions 11/205 dead transitions. [2021-11-07 07:47:49,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 205 transitions, 4207 flow [2021-11-07 07:47:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:47:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-07 07:47:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-11-07 07:47:49,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-11-07 07:47:49,720 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-11-07 07:47:49,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-11-07 07:47:49,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:49,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-11-07 07:47:49,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:49,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:49,728 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:49,728 INFO L186 Difference]: Start difference. First operand has 220 places, 168 transitions, 2440 flow. Second operand 24 states and 1337 transitions. [2021-11-07 07:47:49,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 205 transitions, 4207 flow [2021-11-07 07:47:49,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 205 transitions, 3716 flow, removed 181 selfloop flow, removed 17 redundant places. [2021-11-07 07:47:49,836 INFO L242 Difference]: Finished difference. Result has 229 places, 186 transitions, 2825 flow [2021-11-07 07:47:49,837 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2825, PETRI_PLACES=229, PETRI_TRANSITIONS=186} [2021-11-07 07:47:49,837 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 163 predicate places. [2021-11-07 07:47:49,837 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 186 transitions, 2825 flow [2021-11-07 07:47:49,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:49,838 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:49,838 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 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] [2021-11-07 07:47:49,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-07 07:47:50,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:47:50,038 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:50,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1801962500, now seen corresponding path program 14 times [2021-11-07 07:47:50,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:50,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559885935] [2021-11-07 07:47:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:50,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:47:50,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:50,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559885935] [2021-11-07 07:47:50,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559885935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:50,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676207717] [2021-11-07 07:47:50,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:47:50,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:50,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:50,197 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:50,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:47:50,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:47:50,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:47:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:47:50,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676207717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:50,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:50,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-11-07 07:47:50,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078735094] [2021-11-07 07:47:50,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:47:50,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:50,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:47:50,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:47:50,943 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:50,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 186 transitions, 2825 flow. Second operand has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:50,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:50,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:50,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:51,545 INFO L129 PetriNetUnfolder]: 129/816 cut-off events. [2021-11-07 07:47:51,546 INFO L130 PetriNetUnfolder]: For 29326/29457 co-relation queries the response was YES. [2021-11-07 07:47:51,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 816 events. 129/816 cut-off events. For 29326/29457 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5364 event pairs, 0 based on Foata normal form. 78/813 useless extension candidates. Maximal degree in co-relation 4251. Up to 154 conditions per place. [2021-11-07 07:47:51,575 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 49 selfloop transitions, 120 changer transitions 11/224 dead transitions. [2021-11-07 07:47:51,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 224 transitions, 4867 flow [2021-11-07 07:47:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:47:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-07 07:47:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-11-07 07:47:51,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-11-07 07:47:51,581 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-11-07 07:47:51,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-11-07 07:47:51,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:51,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-11-07 07:47:51,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:51,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:51,588 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:51,589 INFO L186 Difference]: Start difference. First operand has 229 places, 186 transitions, 2825 flow. Second operand 24 states and 1337 transitions. [2021-11-07 07:47:51,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 224 transitions, 4867 flow [2021-11-07 07:47:51,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 224 transitions, 4201 flow, removed 275 selfloop flow, removed 22 redundant places. [2021-11-07 07:47:51,700 INFO L242 Difference]: Finished difference. Result has 235 places, 197 transitions, 3092 flow [2021-11-07 07:47:51,701 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3092, PETRI_PLACES=235, PETRI_TRANSITIONS=197} [2021-11-07 07:47:51,701 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 169 predicate places. [2021-11-07 07:47:51,701 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 197 transitions, 3092 flow [2021-11-07 07:47:51,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:51,702 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:51,702 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2021-11-07 07:47:51,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:51,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:51,919 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:51,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:51,919 INFO L85 PathProgramCache]: Analyzing trace with hash 910431551, now seen corresponding path program 15 times [2021-11-07 07:47:51,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:51,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344587328] [2021-11-07 07:47:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:51,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:52,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:52,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344587328] [2021-11-07 07:47:52,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344587328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:52,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102873596] [2021-11-07 07:47:52,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:47:52,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:52,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:52,073 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:52,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:47:52,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:47:52,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:47:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:53,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102873596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:53,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:53,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-07 07:47:53,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499857202] [2021-11-07 07:47:53,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:47:53,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:47:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:47:53,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:53,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 197 transitions, 3092 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:53,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:53,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:53,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:53,781 INFO L129 PetriNetUnfolder]: 151/946 cut-off events. [2021-11-07 07:47:53,782 INFO L130 PetriNetUnfolder]: For 37811/37978 co-relation queries the response was YES. [2021-11-07 07:47:53,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5340 conditions, 946 events. 151/946 cut-off events. For 37811/37978 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6360 event pairs, 0 based on Foata normal form. 83/934 useless extension candidates. Maximal degree in co-relation 5227. Up to 178 conditions per place. [2021-11-07 07:47:53,815 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 68 selfloop transitions, 119 changer transitions 14/245 dead transitions. [2021-11-07 07:47:53,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 245 transitions, 5657 flow [2021-11-07 07:47:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:47:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-07 07:47:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-11-07 07:47:53,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-11-07 07:47:53,825 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-11-07 07:47:53,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-11-07 07:47:53,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:53,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-11-07 07:47:53,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:53,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:53,843 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:53,843 INFO L186 Difference]: Start difference. First operand has 235 places, 197 transitions, 3092 flow. Second operand 29 states and 1616 transitions. [2021-11-07 07:47:53,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 245 transitions, 5657 flow [2021-11-07 07:47:53,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 245 transitions, 5112 flow, removed 190 selfloop flow, removed 17 redundant places. [2021-11-07 07:47:53,990 INFO L242 Difference]: Finished difference. Result has 253 places, 221 transitions, 3895 flow [2021-11-07 07:47:53,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3895, PETRI_PLACES=253, PETRI_TRANSITIONS=221} [2021-11-07 07:47:53,991 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 187 predicate places. [2021-11-07 07:47:53,991 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 221 transitions, 3895 flow [2021-11-07 07:47:53,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:53,992 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:53,992 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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] [2021-11-07 07:47:54,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:54,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:47:54,215 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:54,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1848776937, now seen corresponding path program 16 times [2021-11-07 07:47:54,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:54,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777375605] [2021-11-07 07:47:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:54,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:54,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:54,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777375605] [2021-11-07 07:47:54,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777375605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:54,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457531488] [2021-11-07 07:47:54,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:47:54,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:54,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:54,435 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:54,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:47:55,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:47:55,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:55,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:47:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:55,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457531488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:55,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:55,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-11-07 07:47:55,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040668135] [2021-11-07 07:47:55,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:47:55,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:47:55,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:47:55,325 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:55,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 221 transitions, 3895 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:55,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:55,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:55,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:56,072 INFO L129 PetriNetUnfolder]: 161/1005 cut-off events. [2021-11-07 07:47:56,073 INFO L130 PetriNetUnfolder]: For 50082/50280 co-relation queries the response was YES. [2021-11-07 07:47:56,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6065 conditions, 1005 events. 161/1005 cut-off events. For 50082/50280 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6761 event pairs, 0 based on Foata normal form. 83/988 useless extension candidates. Maximal degree in co-relation 5944. Up to 188 conditions per place. [2021-11-07 07:47:56,104 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 61 selfloop transitions, 150 changer transitions 14/269 dead transitions. [2021-11-07 07:47:56,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 269 transitions, 6877 flow [2021-11-07 07:47:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:47:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-07 07:47:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-11-07 07:47:56,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-11-07 07:47:56,108 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-11-07 07:47:56,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-11-07 07:47:56,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:56,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-11-07 07:47:56,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:56,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:56,118 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:56,118 INFO L186 Difference]: Start difference. First operand has 253 places, 221 transitions, 3895 flow. Second operand 29 states and 1616 transitions. [2021-11-07 07:47:56,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 269 transitions, 6877 flow [2021-11-07 07:47:56,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 269 transitions, 5783 flow, removed 480 selfloop flow, removed 23 redundant places. [2021-11-07 07:47:56,340 INFO L242 Difference]: Finished difference. Result has 265 places, 235 transitions, 4128 flow [2021-11-07 07:47:56,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4128, PETRI_PLACES=265, PETRI_TRANSITIONS=235} [2021-11-07 07:47:56,341 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 199 predicate places. [2021-11-07 07:47:56,341 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 235 transitions, 4128 flow [2021-11-07 07:47:56,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:56,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:56,341 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:56,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:56,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 07:47:56,549 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:56,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1430628198, now seen corresponding path program 17 times [2021-11-07 07:47:56,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:56,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473244762] [2021-11-07 07:47:56,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:56,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:56,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:56,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473244762] [2021-11-07 07:47:56,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473244762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:56,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22246246] [2021-11-07 07:47:56,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:47:56,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:56,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:56,742 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:56,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:47:57,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:47:57,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:57,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:47:57,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:57,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22246246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:57,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:57,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-07 07:47:57,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956551352] [2021-11-07 07:47:57,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:47:57,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:57,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:47:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:47:57,801 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-07 07:47:57,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 235 transitions, 4128 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:57,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:47:57,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-07 07:47:57,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:47:58,663 INFO L129 PetriNetUnfolder]: 171/1071 cut-off events. [2021-11-07 07:47:58,663 INFO L130 PetriNetUnfolder]: For 62041/62243 co-relation queries the response was YES. [2021-11-07 07:47:58,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 1071 events. 171/1071 cut-off events. For 62041/62243 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7174 event pairs, 0 based on Foata normal form. 86/1049 useless extension candidates. Maximal degree in co-relation 6484. Up to 178 conditions per place. [2021-11-07 07:47:58,744 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 65 selfloop transitions, 152 changer transitions 14/275 dead transitions. [2021-11-07 07:47:58,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 275 transitions, 7102 flow [2021-11-07 07:47:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:47:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-07 07:47:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1838 transitions. [2021-11-07 07:47:58,748 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438934802571166 [2021-11-07 07:47:58,748 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1838 transitions. [2021-11-07 07:47:58,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1838 transitions. [2021-11-07 07:47:58,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:47:58,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1838 transitions. [2021-11-07 07:47:58,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.696969696969695) internal successors, (1838), 33 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:58,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:58,758 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:58,758 INFO L186 Difference]: Start difference. First operand has 265 places, 235 transitions, 4128 flow. Second operand 33 states and 1838 transitions. [2021-11-07 07:47:58,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 275 transitions, 7102 flow [2021-11-07 07:47:58,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 275 transitions, 6322 flow, removed 284 selfloop flow, removed 20 redundant places. [2021-11-07 07:47:58,938 INFO L242 Difference]: Finished difference. Result has 283 places, 249 transitions, 4657 flow [2021-11-07 07:47:58,939 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4657, PETRI_PLACES=283, PETRI_TRANSITIONS=249} [2021-11-07 07:47:58,939 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 217 predicate places. [2021-11-07 07:47:58,939 INFO L470 AbstractCegarLoop]: Abstraction has has 283 places, 249 transitions, 4657 flow [2021-11-07 07:47:58,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:58,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:47:58,940 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:58,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-07 07:47:59,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:47:59,154 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:47:59,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:59,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1334764032, now seen corresponding path program 18 times [2021-11-07 07:47:59,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:59,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645925686] [2021-11-07 07:47:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:59,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 72 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:47:59,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:59,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645925686] [2021-11-07 07:47:59,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645925686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:59,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623639050] [2021-11-07 07:47:59,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:47:59,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:59,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:59,290 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:59,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:47:59,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-07 07:47:59,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:59,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:47:59,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:48:00,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623639050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:00,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:48:00,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-11-07 07:48:00,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963810333] [2021-11-07 07:48:00,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:48:00,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:00,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:48:00,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:00,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 66 [2021-11-07 07:48:00,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 249 transitions, 4657 flow. Second operand has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:00,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:00,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 66 [2021-11-07 07:48:00,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:01,344 INFO L129 PetriNetUnfolder]: 435/2584 cut-off events. [2021-11-07 07:48:01,345 INFO L130 PetriNetUnfolder]: For 99560/99685 co-relation queries the response was YES. [2021-11-07 07:48:01,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12586 conditions, 2584 events. 435/2584 cut-off events. For 99560/99685 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 24272 event pairs, 74 based on Foata normal form. 58/2387 useless extension candidates. Maximal degree in co-relation 12456. Up to 365 conditions per place. [2021-11-07 07:48:01,414 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 7 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2021-11-07 07:48:01,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 264 transitions, 4511 flow [2021-11-07 07:48:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:48:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-07 07:48:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1019 transitions. [2021-11-07 07:48:01,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577441077441077 [2021-11-07 07:48:01,417 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1019 transitions. [2021-11-07 07:48:01,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1019 transitions. [2021-11-07 07:48:01,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:01,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1019 transitions. [2021-11-07 07:48:01,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:01,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:01,423 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:01,423 INFO L186 Difference]: Start difference. First operand has 283 places, 249 transitions, 4657 flow. Second operand 18 states and 1019 transitions. [2021-11-07 07:48:01,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 264 transitions, 4511 flow [2021-11-07 07:48:01,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 264 transitions, 3697 flow, removed 309 selfloop flow, removed 25 redundant places. [2021-11-07 07:48:01,622 INFO L242 Difference]: Finished difference. Result has 271 places, 260 transitions, 3685 flow [2021-11-07 07:48:01,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3685, PETRI_PLACES=271, PETRI_TRANSITIONS=260} [2021-11-07 07:48:01,623 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 205 predicate places. [2021-11-07 07:48:01,623 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 260 transitions, 3685 flow [2021-11-07 07:48:01,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:01,624 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 07:48:01,624 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:01,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-07 07:48:01,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:48:01,834 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 07:48:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash -101909755, now seen corresponding path program 19 times [2021-11-07 07:48:01,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:01,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767256729] [2021-11-07 07:48:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:01,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 62 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:48:01,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:01,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767256729] [2021-11-07 07:48:01,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767256729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:01,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412727291] [2021-11-07 07:48:01,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:01,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:01,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:01,947 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:01,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:48:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:02,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:48:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:48:02,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412727291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:02,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:48:02,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-11-07 07:48:02,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769042863] [2021-11-07 07:48:02,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:48:02,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:48:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:02,741 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 66 [2021-11-07 07:48:02,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 260 transitions, 3685 flow. Second operand has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:02,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 07:48:02,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 66 [2021-11-07 07:48:02,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 07:48:05,097 INFO L129 PetriNetUnfolder]: 1419/7124 cut-off events. [2021-11-07 07:48:05,097 INFO L130 PetriNetUnfolder]: For 282384/282687 co-relation queries the response was YES. [2021-11-07 07:48:05,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36081 conditions, 7124 events. 1419/7124 cut-off events. For 282384/282687 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 85923 event pairs, 272 based on Foata normal form. 191/7017 useless extension candidates. Maximal degree in co-relation 35966. Up to 945 conditions per place. [2021-11-07 07:48:05,252 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 0 selfloop transitions, 0 changer transitions 263/263 dead transitions. [2021-11-07 07:48:05,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 263 transitions, 3501 flow [2021-11-07 07:48:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:48:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-07 07:48:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1019 transitions. [2021-11-07 07:48:05,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577441077441077 [2021-11-07 07:48:05,255 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1019 transitions. [2021-11-07 07:48:05,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1019 transitions. [2021-11-07 07:48:05,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:48:05,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1019 transitions. [2021-11-07 07:48:05,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:05,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:05,262 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:05,262 INFO L186 Difference]: Start difference. First operand has 271 places, 260 transitions, 3685 flow. Second operand 18 states and 1019 transitions. [2021-11-07 07:48:05,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 263 transitions, 3501 flow [2021-11-07 07:48:05,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 263 transitions, 3125 flow, removed 44 selfloop flow, removed 24 redundant places. [2021-11-07 07:48:05,686 INFO L242 Difference]: Finished difference. Result has 261 places, 0 transitions, 0 flow [2021-11-07 07:48:05,687 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=261, PETRI_TRANSITIONS=0} [2021-11-07 07:48:05,687 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 195 predicate places. [2021-11-07 07:48:05,687 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 0 transitions, 0 flow [2021-11-07 07:48:05,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:05,691 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 07:48:05,691 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 07:48:05,691 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-11-07 07:48:05,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:05,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:48:05,910 INFO L731 BasicCegarLoop]: Path program histogram: [19, 4, 2, 2, 1, 1] [2021-11-07 07:48:05,912 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-07 07:48:05,912 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 07:48:05,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:48:05 BasicIcfg [2021-11-07 07:48:05,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 07:48:05,916 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:48:05,916 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:48:05,916 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:48:05,917 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:47:24" (3/4) ... [2021-11-07 07:48:05,921 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 07:48:06,023 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-11-07 07:48:06,024 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-11-07 07:48:06,031 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-07 07:48:06,031 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 07:48:06,031 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-07 07:48:06,032 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 07:48:06,063 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/witness.graphml [2021-11-07 07:48:06,065 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:48:06,067 INFO L168 Benchmark]: Toolchain (without parser) took 43195.82 ms. Allocated memory was 109.1 MB in the beginning and 998.2 MB in the end (delta: 889.2 MB). Free memory was 69.7 MB in the beginning and 743.8 MB in the end (delta: -674.1 MB). Peak memory consumption was 388.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:48:06,067 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 109.1 MB. Free memory is still 87.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:48:06,068 INFO L168 Benchmark]: CACSL2BoogieTranslator took 659.01 ms. Allocated memory is still 109.1 MB. Free memory was 69.5 MB in the beginning and 79.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:48:06,070 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.07 ms. Allocated memory is still 109.1 MB. Free memory was 79.1 MB in the beginning and 77.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:48:06,070 INFO L168 Benchmark]: Boogie Preprocessor took 33.36 ms. Allocated memory is still 109.1 MB. Free memory was 77.0 MB in the beginning and 75.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:48:06,071 INFO L168 Benchmark]: RCFGBuilder took 471.00 ms. Allocated memory is still 109.1 MB. Free memory was 75.9 MB in the beginning and 64.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:48:06,071 INFO L168 Benchmark]: TraceAbstraction took 41788.98 ms. Allocated memory was 109.1 MB in the beginning and 998.2 MB in the end (delta: 889.2 MB). Free memory was 63.9 MB in the beginning and 596.1 MB in the end (delta: -532.2 MB). Peak memory consumption was 371.8 MB. Max. memory is 16.1 GB. [2021-11-07 07:48:06,073 INFO L168 Benchmark]: Witness Printer took 148.90 ms. Allocated memory is still 998.2 MB. Free memory was 596.1 MB in the beginning and 743.8 MB in the end (delta: -147.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:48:06,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 109.1 MB. Free memory is still 87.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 659.01 ms. Allocated memory is still 109.1 MB. Free memory was 69.5 MB in the beginning and 79.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 82.07 ms. Allocated memory is still 109.1 MB. Free memory was 79.1 MB in the beginning and 77.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.36 ms. Allocated memory is still 109.1 MB. Free memory was 77.0 MB in the beginning and 75.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 471.00 ms. Allocated memory is still 109.1 MB. Free memory was 75.9 MB in the beginning and 64.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 41788.98 ms. Allocated memory was 109.1 MB in the beginning and 998.2 MB in the end (delta: 889.2 MB). Free memory was 63.9 MB in the beginning and 596.1 MB in the end (delta: -532.2 MB). Peak memory consumption was 371.8 MB. Max. memory is 16.1 GB. * Witness Printer took 148.90 ms. Allocated memory is still 998.2 MB. Free memory was 596.1 MB in the beginning and 743.8 MB in the end (delta: -147.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.1 GB. * 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: 722]: 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 5 procedures, 84 locations, 3 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: 41.6s, OverallIterations: 29, TraceHistogramMax: 6, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 16.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 705 SDslu, 298 SDs, 0 SdLazy, 2618 SolverSat, 855 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1953 GetRequests, 1375 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4657occurred in iteration=27, InterpolantAutomatonStates: 509, 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: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 2970 NumberOfCodeBlocks, 2970 NumberOfCodeBlocksAsserted, 87 NumberOfCheckSat, 2918 ConstructedInterpolants, 0 QuantifiedInterpolants, 9798 SizeOfPredicates, 154 NumberOfNonLiveVariables, 3442 ConjunctsInSsa, 263 ConjunctsInUnsatCore, 52 InterpolantComputations, 8 PerfectInterpolantSequences, 360/1194 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! [2021-11-07 07:48:06,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ff57d5-4313-4821-be7b-c8985a52d247/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE