./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3 --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 68715fea0843357622ba034d173c405f3e766643 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:21:34,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:21:34,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:21:34,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:21:34,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:21:34,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:21:34,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:21:34,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:21:34,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:21:34,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:21:34,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:21:34,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:21:34,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:21:34,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:21:34,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:21:34,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:21:34,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:21:34,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:21:34,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:21:34,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:21:34,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:21:34,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:21:34,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:21:34,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:21:34,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:21:34,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:21:34,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:21:34,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:21:34,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:21:34,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:21:34,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:21:34,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:21:34,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:21:34,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:21:34,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:21:34,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:21:34,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:21:34,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:21:34,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:21:34,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:21:34,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:21:34,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:21:34,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:21:34,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:21:34,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:21:34,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:21:34,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:21:34,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:21:34,752 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:21:34,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:21:34,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:21:34,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:21:34,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:21:34,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:21:34,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:21:34,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:21:34,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:21:34,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:21:34,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:21:34,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:21:34,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:21:34,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:21:34,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:21:34,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:21:34,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:21:34,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:21:34,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:21:34,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:21:34,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:21:34,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:21:34,758 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:21:34,758 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:21:34,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:21:34,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:21:34,759 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_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68715fea0843357622ba034d173c405f3e766643 [2021-10-15 20:21:35,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:21:35,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:21:35,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:21:35,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:21:35,108 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:21:35,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-10-15 20:21:35,185 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/data/89c8e2fc2/bcc0b3f49475410cbe4f715b51f3c3f0/FLAGc736995fd [2021-10-15 20:21:35,833 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:21:35,834 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-10-15 20:21:35,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/data/89c8e2fc2/bcc0b3f49475410cbe4f715b51f3c3f0/FLAGc736995fd [2021-10-15 20:21:36,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/data/89c8e2fc2/bcc0b3f49475410cbe4f715b51f3c3f0 [2021-10-15 20:21:36,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:21:36,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:21:36,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:21:36,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:21:36,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:21:36,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78459578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36, skipping insertion in model container [2021-10-15 20:21:36,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:21:36,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:21:36,521 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_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-10-15 20:21:36,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:21:36,534 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:21:36,589 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_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-10-15 20:21:36,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:21:36,623 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:21:36,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36 WrapperNode [2021-10-15 20:21:36,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:21:36,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:21:36,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:21:36,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:21:36,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:21:36,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:21:36,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:21:36,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:21:36,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:21:36,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:21:36,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:21:36,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:21:36,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (1/1) ... [2021-10-15 20:21:36,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:21:36,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:21:36,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:21:36,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:21:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:21:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:21:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:21:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 20:21:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:21:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 20:21:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:21:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 20:21:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:21:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:21:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:21:37,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:21:37,244 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-15 20:21:37,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:37 BoogieIcfgContainer [2021-10-15 20:21:37,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:21:37,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:21:37,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:21:37,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:21:37,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:21:36" (1/3) ... [2021-10-15 20:21:37,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5331001e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:37, skipping insertion in model container [2021-10-15 20:21:37,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:36" (2/3) ... [2021-10-15 20:21:37,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5331001e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:37, skipping insertion in model container [2021-10-15 20:21:37,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:37" (3/3) ... [2021-10-15 20:21:37,284 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2021-10-15 20:21:37,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:21:37,291 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:21:37,366 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:21:37,376 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, mConcurrency=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 [2021-10-15 20:21:37,376 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:21:37,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 49 transitions, 98 flow [2021-10-15 20:21:37,433 INFO L129 PetriNetUnfolder]: 16/49 cut-off events. [2021-10-15 20:21:37,434 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:21:37,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 49 events. 16/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:21:37,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 49 transitions, 98 flow [2021-10-15 20:21:37,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 37 transitions, 74 flow [2021-10-15 20:21:37,465 INFO L129 PetriNetUnfolder]: 9/33 cut-off events. [2021-10-15 20:21:37,466 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:21:37,467 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:21:37,468 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:21:37,469 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:21:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:21:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1638957061, now seen corresponding path program 1 times [2021-10-15 20:21:37,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:21:37,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855034555] [2021-10-15 20:21:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:37,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:21:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:21:37,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:21:37,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855034555] [2021-10-15 20:21:37,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855034555] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:21:37,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:21:37,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:21:37,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315079139] [2021-10-15 20:21:37,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:21:37,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:21:37,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:21:37,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:21:37,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 49 [2021-10-15 20:21:37,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 37 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:37,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:21:37,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 49 [2021-10-15 20:21:37,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:21:37,924 INFO L129 PetriNetUnfolder]: 9/41 cut-off events. [2021-10-15 20:21:37,925 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:21:37,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 41 events. 9/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 2/34 useless extension candidates. Maximal degree in co-relation 24. Up to 5 conditions per place. [2021-10-15 20:21:37,927 INFO L132 encePairwiseOnDemand]: 43/49 looper letters, 4 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2021-10-15 20:21:37,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 84 flow [2021-10-15 20:21:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:21:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:21:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2021-10-15 20:21:37,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.891156462585034 [2021-10-15 20:21:37,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2021-10-15 20:21:37,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2021-10-15 20:21:37,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:21:37,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2021-10-15 20:21:37,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:37,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:37,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:37,955 INFO L186 Difference]: Start difference. First operand has 27 places, 37 transitions, 74 flow. Second operand 3 states and 131 transitions. [2021-10-15 20:21:37,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 84 flow [2021-10-15 20:21:37,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 84 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:21:37,962 INFO L242 Difference]: Finished difference. Result has 30 places, 35 transitions, 80 flow [2021-10-15 20:21:37,965 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=35} [2021-10-15 20:21:37,966 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2021-10-15 20:21:37,966 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 35 transitions, 80 flow [2021-10-15 20:21:37,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:37,967 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:21:37,967 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:21:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:21:37,967 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:21:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:21:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash -167679121, now seen corresponding path program 1 times [2021-10-15 20:21:37,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:21:37,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391053317] [2021-10-15 20:21:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:37,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:21:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:21:38,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:21:38,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391053317] [2021-10-15 20:21:38,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391053317] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:21:38,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:21:38,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:21:38,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37477889] [2021-10-15 20:21:38,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:21:38,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:21:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:21:38,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:21:38,093 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 49 [2021-10-15 20:21:38,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 35 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:21:38,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 49 [2021-10-15 20:21:38,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:21:38,118 INFO L129 PetriNetUnfolder]: 8/41 cut-off events. [2021-10-15 20:21:38,118 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 20:21:38,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 41 events. 8/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 42. Up to 7 conditions per place. [2021-10-15 20:21:38,125 INFO L132 encePairwiseOnDemand]: 45/49 looper letters, 6 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2021-10-15 20:21:38,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 108 flow [2021-10-15 20:21:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:21:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:21:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2021-10-15 20:21:38,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8435374149659864 [2021-10-15 20:21:38,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2021-10-15 20:21:38,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2021-10-15 20:21:38,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:21:38,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2021-10-15 20:21:38,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,135 INFO L186 Difference]: Start difference. First operand has 30 places, 35 transitions, 80 flow. Second operand 3 states and 124 transitions. [2021-10-15 20:21:38,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 108 flow [2021-10-15 20:21:38,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:21:38,139 INFO L242 Difference]: Finished difference. Result has 33 places, 37 transitions, 106 flow [2021-10-15 20:21:38,139 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=37} [2021-10-15 20:21:38,148 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2021-10-15 20:21:38,149 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 37 transitions, 106 flow [2021-10-15 20:21:38,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:21:38,149 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:21:38,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:21:38,150 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:21:38,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:21:38,151 INFO L82 PathProgramCache]: Analyzing trace with hash -754485135, now seen corresponding path program 1 times [2021-10-15 20:21:38,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:21:38,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187276603] [2021-10-15 20:21:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:38,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:21:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:21:38,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:21:38,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187276603] [2021-10-15 20:21:38,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187276603] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:21:38,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442872888] [2021-10-15 20:21:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:38,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:21:38,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:21:38,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:21:38,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:21:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:21:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:21:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:21:38,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442872888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:21:38,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:21:38,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 20:21:38,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599187198] [2021-10-15 20:21:38,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:21:38,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:21:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:21:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:21:38,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 49 [2021-10-15 20:21:38,542 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 37 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:21:38,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 49 [2021-10-15 20:21:38,543 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:21:38,583 INFO L129 PetriNetUnfolder]: 8/42 cut-off events. [2021-10-15 20:21:38,586 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 20:21:38,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 42 events. 8/42 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 29 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 40. Up to 5 conditions per place. [2021-10-15 20:21:38,587 INFO L132 encePairwiseOnDemand]: 45/49 looper letters, 3 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2021-10-15 20:21:38,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 126 flow [2021-10-15 20:21:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:21:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:21:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2021-10-15 20:21:38,595 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2021-10-15 20:21:38,596 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 168 transitions. [2021-10-15 20:21:38,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 168 transitions. [2021-10-15 20:21:38,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:21:38,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 168 transitions. [2021-10-15 20:21:38,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,603 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,603 INFO L186 Difference]: Start difference. First operand has 33 places, 37 transitions, 106 flow. Second operand 4 states and 168 transitions. [2021-10-15 20:21:38,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 126 flow [2021-10-15 20:21:38,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:21:38,607 INFO L242 Difference]: Finished difference. Result has 36 places, 38 transitions, 122 flow [2021-10-15 20:21:38,607 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2021-10-15 20:21:38,607 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2021-10-15 20:21:38,607 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 122 flow [2021-10-15 20:21:38,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:38,608 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:21:38,608 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:21:38,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:21:38,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:21:38,809 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:21:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:21:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash -251743387, now seen corresponding path program 1 times [2021-10-15 20:21:38,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:21:38,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440641634] [2021-10-15 20:21:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:38,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:21:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:21:39,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:21:39,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440641634] [2021-10-15 20:21:39,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440641634] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:21:39,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:21:39,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-15 20:21:39,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605357418] [2021-10-15 20:21:39,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:21:39,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:21:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:21:39,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:21:39,185 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2021-10-15 20:21:39,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 122 flow. Second operand has 11 states, 11 states have (on average 18.90909090909091) internal successors, (208), 11 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:39,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:21:39,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2021-10-15 20:21:39,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:21:39,549 INFO L129 PetriNetUnfolder]: 6/39 cut-off events. [2021-10-15 20:21:39,549 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 20:21:39,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 39 events. 6/39 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 42. Up to 5 conditions per place. [2021-10-15 20:21:39,550 INFO L132 encePairwiseOnDemand]: 36/49 looper letters, 13 selfloop transitions, 14 changer transitions 0/39 dead transitions. [2021-10-15 20:21:39,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 170 flow [2021-10-15 20:21:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:21:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:21:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2021-10-15 20:21:39,554 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2021-10-15 20:21:39,554 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 232 transitions. [2021-10-15 20:21:39,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 232 transitions. [2021-10-15 20:21:39,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:21:39,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 232 transitions. [2021-10-15 20:21:39,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:39,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 49.0) internal successors, (637), 13 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:39,559 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 49.0) internal successors, (637), 13 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:39,559 INFO L186 Difference]: Start difference. First operand has 36 places, 38 transitions, 122 flow. Second operand 12 states and 232 transitions. [2021-10-15 20:21:39,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 170 flow [2021-10-15 20:21:39,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 164 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:21:39,569 INFO L242 Difference]: Finished difference. Result has 46 places, 38 transitions, 140 flow [2021-10-15 20:21:39,569 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=140, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2021-10-15 20:21:39,569 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 19 predicate places. [2021-10-15 20:21:39,569 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 140 flow [2021-10-15 20:21:39,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.90909090909091) internal successors, (208), 11 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:39,570 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:21:39,571 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:21:39,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:21:39,571 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:21:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:21:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash 545673585, now seen corresponding path program 1 times [2021-10-15 20:21:39,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:21:39,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815824103] [2021-10-15 20:21:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:39,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:21:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:21:40,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:21:40,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815824103] [2021-10-15 20:21:40,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815824103] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:21:40,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:21:40,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-15 20:21:40,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752388023] [2021-10-15 20:21:40,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:21:40,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:21:40,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:21:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:21:40,117 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2021-10-15 20:21:40,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 140 flow. Second operand has 17 states, 17 states have (on average 17.41176470588235) internal successors, (296), 17 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:40,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:21:40,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2021-10-15 20:21:40,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:21:41,285 INFO L129 PetriNetUnfolder]: 6/46 cut-off events. [2021-10-15 20:21:41,285 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 20:21:41,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 46 events. 6/46 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 26 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 67. Up to 6 conditions per place. [2021-10-15 20:21:41,286 INFO L132 encePairwiseOnDemand]: 35/49 looper letters, 13 selfloop transitions, 22 changer transitions 0/46 dead transitions. [2021-10-15 20:21:41,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 46 transitions, 238 flow [2021-10-15 20:21:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:21:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:21:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 372 transitions. [2021-10-15 20:21:41,291 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36151603498542273 [2021-10-15 20:21:41,291 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 372 transitions. [2021-10-15 20:21:41,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 372 transitions. [2021-10-15 20:21:41,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:21:41,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 372 transitions. [2021-10-15 20:21:41,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 17.714285714285715) internal successors, (372), 21 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:41,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 49.0) internal successors, (1078), 22 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:41,298 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 49.0) internal successors, (1078), 22 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:41,299 INFO L186 Difference]: Start difference. First operand has 46 places, 38 transitions, 140 flow. Second operand 21 states and 372 transitions. [2021-10-15 20:21:41,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 46 transitions, 238 flow [2021-10-15 20:21:41,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 46 transitions, 224 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-10-15 20:21:41,302 INFO L242 Difference]: Finished difference. Result has 63 places, 44 transitions, 204 flow [2021-10-15 20:21:41,303 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=204, PETRI_PLACES=63, PETRI_TRANSITIONS=44} [2021-10-15 20:21:41,303 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 36 predicate places. [2021-10-15 20:21:41,303 INFO L470 AbstractCegarLoop]: Abstraction has has 63 places, 44 transitions, 204 flow [2021-10-15 20:21:41,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 17.41176470588235) internal successors, (296), 17 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:21:41,304 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:21:41,304 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:21:41,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:21:41,304 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:21:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:21:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash -59302580, now seen corresponding path program 1 times [2021-10-15 20:21:41,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:21:41,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157353053] [2021-10-15 20:21:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:41,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:21:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:21:42,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:21:42,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157353053] [2021-10-15 20:21:42,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157353053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:21:42,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060055526] [2021-10-15 20:21:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:42,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:21:42,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:21:42,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:21:42,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:21:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-15 20:21:42,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:21:42,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:21:42,905 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:21:42,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 20:21:43,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:21:43,252 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-15 20:21:43,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 35 [2021-10-15 20:21:43,757 INFO L354 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2021-10-15 20:21:43,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-10-15 20:21:43,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:21:44,051 INFO L354 Elim1Store]: treesize reduction 440, result has 8.5 percent of original size [2021-10-15 20:21:44,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 161 treesize of output 107 [2021-10-15 20:21:44,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:21:44,086 INFO L354 Elim1Store]: treesize reduction 82, result has 18.8 percent of original size [2021-10-15 20:21:44,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 121 [2021-10-15 20:21:45,681 INFO L354 Elim1Store]: treesize reduction 634, result has 11.6 percent of original size [2021-10-15 20:21:45,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 198 treesize of output 191 [2021-10-15 20:21:45,823 INFO L354 Elim1Store]: treesize reduction 306, result has 24.8 percent of original size [2021-10-15 20:21:45,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 292 treesize of output 322 [2021-10-15 20:21:50,993 INFO L354 Elim1Store]: treesize reduction 417, result has 30.6 percent of original size [2021-10-15 20:21:50,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 460 treesize of output 406 [2021-10-15 20:21:51,216 INFO L354 Elim1Store]: treesize reduction 222, result has 37.1 percent of original size [2021-10-15 20:21:51,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 406 treesize of output 447 [2021-10-15 20:22:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:22:47,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060055526] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:22:47,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:22:47,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [21] total 38 [2021-10-15 20:22:47,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390607457] [2021-10-15 20:22:47,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-15 20:22:47,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:22:47,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-15 20:22:47,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-10-15 20:22:47,635 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2021-10-15 20:22:47,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 44 transitions, 204 flow. Second operand has 20 states, 20 states have (on average 15.35) internal successors, (307), 20 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:47,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:22:47,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2021-10-15 20:22:47,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:22:54,490 INFO L129 PetriNetUnfolder]: 5/45 cut-off events. [2021-10-15 20:22:54,491 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-10-15 20:22:54,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 45 events. 5/45 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2021-10-15 20:22:54,493 INFO L132 encePairwiseOnDemand]: 32/49 looper letters, 9 selfloop transitions, 27 changer transitions 0/45 dead transitions. [2021-10-15 20:22:54,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 45 transitions, 278 flow [2021-10-15 20:22:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:22:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:22:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 326 transitions. [2021-10-15 20:22:54,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.31681243926141883 [2021-10-15 20:22:54,499 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 326 transitions. [2021-10-15 20:22:54,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 326 transitions. [2021-10-15 20:22:54,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:22:54,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 326 transitions. [2021-10-15 20:22:54,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 15.523809523809524) internal successors, (326), 21 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:54,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 49.0) internal successors, (1078), 22 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:54,507 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 49.0) internal successors, (1078), 22 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:54,507 INFO L186 Difference]: Start difference. First operand has 63 places, 44 transitions, 204 flow. Second operand 21 states and 326 transitions. [2021-10-15 20:22:54,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 45 transitions, 278 flow [2021-10-15 20:22:54,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 45 transitions, 221 flow, removed 7 selfloop flow, removed 15 redundant places. [2021-10-15 20:22:54,512 INFO L242 Difference]: Finished difference. Result has 68 places, 43 transitions, 199 flow [2021-10-15 20:22:54,513 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=199, PETRI_PLACES=68, PETRI_TRANSITIONS=43} [2021-10-15 20:22:54,513 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2021-10-15 20:22:54,514 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 43 transitions, 199 flow [2021-10-15 20:22:54,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.35) internal successors, (307), 20 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:22:54,514 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:22:54,515 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:22:54,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:22:54,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:54,724 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:22:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:22:54,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1179993784, now seen corresponding path program 1 times [2021-10-15 20:22:54,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:22:54,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61206343] [2021-10-15 20:22:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:54,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:22:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:22:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:22:55,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:22:55,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61206343] [2021-10-15 20:22:55,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61206343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:22:55,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419092538] [2021-10-15 20:22:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:22:55,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:22:55,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:22:55,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:22:55,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:22:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:22:55,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-15 20:22:55,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:22:56,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:22:56,353 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:22:56,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 20:22:56,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:22:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:22:56,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-10-15 20:22:56,686 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-15 20:22:56,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 60 [2021-10-15 20:22:56,698 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-10-15 20:22:56,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 56 [2021-10-15 20:22:57,156 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-10-15 20:22:57,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-10-15 20:22:57,524 INFO L354 Elim1Store]: treesize reduction 223, result has 11.9 percent of original size [2021-10-15 20:22:57,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 175 [2021-10-15 20:22:57,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:22:57,609 INFO L354 Elim1Store]: treesize reduction 344, result has 9.2 percent of original size [2021-10-15 20:22:57,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 147 treesize of output 111 [2021-10-15 20:22:57,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:22:57,642 INFO L354 Elim1Store]: treesize reduction 82, result has 18.8 percent of original size [2021-10-15 20:22:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 155 [2021-10-15 20:22:59,189 INFO L354 Elim1Store]: treesize reduction 792, result has 8.1 percent of original size [2021-10-15 20:22:59,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 29 case distinctions, treesize of input 452 treesize of output 232 [2021-10-15 20:22:59,286 INFO L354 Elim1Store]: treesize reduction 458, result has 13.1 percent of original size [2021-10-15 20:22:59,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 435 treesize of output 393 [2021-10-15 20:22:59,306 INFO L354 Elim1Store]: treesize reduction 83, result has 11.7 percent of original size [2021-10-15 20:22:59,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 388 treesize of output 336 [2021-10-15 20:22:59,328 INFO L354 Elim1Store]: treesize reduction 65, result has 14.5 percent of original size [2021-10-15 20:22:59,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 299 [2021-10-15 20:23:03,092 INFO L354 Elim1Store]: treesize reduction 312, result has 7.4 percent of original size [2021-10-15 20:23:03,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 310 treesize of output 155 [2021-10-15 20:23:03,125 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-15 20:23:03,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 118 [2021-10-15 20:23:03,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-10-15 20:23:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:23:03,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419092538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:23:03,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:23:03,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-10-15 20:23:03,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712430243] [2021-10-15 20:23:03,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-15 20:23:03,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:23:03,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-15 20:23:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=0, NotChecked=0, Total=1722 [2021-10-15 20:23:03,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2021-10-15 20:23:03,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 43 transitions, 199 flow. Second operand has 42 states, 42 states have (on average 14.357142857142858) internal successors, (603), 42 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:03,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:23:03,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2021-10-15 20:23:03,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:23:10,081 INFO L129 PetriNetUnfolder]: 9/70 cut-off events. [2021-10-15 20:23:10,081 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 20:23:10,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 70 events. 9/70 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 111. Up to 8 conditions per place. [2021-10-15 20:23:10,082 INFO L132 encePairwiseOnDemand]: 30/49 looper letters, 23 selfloop transitions, 29 changer transitions 0/59 dead transitions. [2021-10-15 20:23:10,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 59 transitions, 352 flow [2021-10-15 20:23:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-15 20:23:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-15 20:23:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 404 transitions. [2021-10-15 20:23:10,087 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.30536659108087677 [2021-10-15 20:23:10,087 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 404 transitions. [2021-10-15 20:23:10,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 404 transitions. [2021-10-15 20:23:10,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:23:10,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 404 transitions. [2021-10-15 20:23:10,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 14.962962962962964) internal successors, (404), 27 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:10,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 49.0) internal successors, (1372), 28 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:10,093 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 49.0) internal successors, (1372), 28 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:10,094 INFO L186 Difference]: Start difference. First operand has 68 places, 43 transitions, 199 flow. Second operand 27 states and 404 transitions. [2021-10-15 20:23:10,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 59 transitions, 352 flow [2021-10-15 20:23:10,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 59 transitions, 286 flow, removed 0 selfloop flow, removed 20 redundant places. [2021-10-15 20:23:10,099 INFO L242 Difference]: Finished difference. Result has 79 places, 50 transitions, 248 flow [2021-10-15 20:23:10,100 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=248, PETRI_PLACES=79, PETRI_TRANSITIONS=50} [2021-10-15 20:23:10,100 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2021-10-15 20:23:10,100 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 50 transitions, 248 flow [2021-10-15 20:23:10,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 14.357142857142858) internal successors, (603), 42 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:10,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:23:10,101 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:23:10,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:23:10,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 20:23:10,316 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:23:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:23:10,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2074843884, now seen corresponding path program 1 times [2021-10-15 20:23:10,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:23:10,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14138121] [2021-10-15 20:23:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:23:10,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:23:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:23:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-15 20:23:10,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:23:10,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14138121] [2021-10-15 20:23:10,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14138121] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:23:10,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:23:10,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:23:10,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204322444] [2021-10-15 20:23:10,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:23:10,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:23:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:23:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:23:10,436 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2021-10-15 20:23:10,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 50 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:10,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:23:10,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2021-10-15 20:23:10,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:23:10,538 INFO L129 PetriNetUnfolder]: 8/69 cut-off events. [2021-10-15 20:23:10,540 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-10-15 20:23:10,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 69 events. 8/69 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 2/69 useless extension candidates. Maximal degree in co-relation 141. Up to 34 conditions per place. [2021-10-15 20:23:10,542 INFO L132 encePairwiseOnDemand]: 43/49 looper letters, 26 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2021-10-15 20:23:10,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 53 transitions, 326 flow [2021-10-15 20:23:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:23:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:23:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2021-10-15 20:23:10,544 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2021-10-15 20:23:10,544 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 132 transitions. [2021-10-15 20:23:10,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 132 transitions. [2021-10-15 20:23:10,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:23:10,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 132 transitions. [2021-10-15 20:23:10,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:10,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:10,547 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:10,547 INFO L186 Difference]: Start difference. First operand has 79 places, 50 transitions, 248 flow. Second operand 5 states and 132 transitions. [2021-10-15 20:23:10,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 53 transitions, 326 flow [2021-10-15 20:23:10,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 279 flow, removed 3 selfloop flow, removed 19 redundant places. [2021-10-15 20:23:10,556 INFO L242 Difference]: Finished difference. Result has 66 places, 53 transitions, 244 flow [2021-10-15 20:23:10,556 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2021-10-15 20:23:10,556 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 39 predicate places. [2021-10-15 20:23:10,557 INFO L470 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 244 flow [2021-10-15 20:23:10,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:10,557 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:23:10,557 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:23:10,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:23:10,558 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:23:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:23:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1447829411, now seen corresponding path program 2 times [2021-10-15 20:23:10,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:23:10,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586455070] [2021-10-15 20:23:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:23:10,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:23:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:23:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:23:11,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:23:11,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586455070] [2021-10-15 20:23:11,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586455070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:23:11,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243208053] [2021-10-15 20:23:11,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:23:11,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:23:11,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:23:11,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:23:11,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:23:11,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:23:11,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:23:11,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 121 conjunts are in the unsatisfiable core [2021-10-15 20:23:11,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:23:11,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:23:11,866 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:23:11,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-15 20:23:12,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:23:12,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:23:12,248 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-15 20:23:12,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-10-15 20:23:12,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-10-15 20:23:12,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-10-15 20:23:12,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:12,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-10-15 20:23:12,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:12,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:23:12,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-10-15 20:23:12,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:12,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:23:12,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-10-15 20:23:12,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:12,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:23:12,816 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:23:12,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 101 [2021-10-15 20:23:12,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 107 [2021-10-15 20:23:12,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:12,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:23:12,839 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-15 20:23:12,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 103 [2021-10-15 20:23:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:13,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:13,351 INFO L354 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-10-15 20:23:13,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 33 [2021-10-15 20:23:13,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:13,674 INFO L354 Elim1Store]: treesize reduction 80, result has 26.6 percent of original size [2021-10-15 20:23:13,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 235 treesize of output 185 [2021-10-15 20:23:13,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 216 [2021-10-15 20:23:13,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 201 [2021-10-15 20:23:13,720 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-15 20:23:13,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 197 [2021-10-15 20:23:13,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:13,758 INFO L354 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2021-10-15 20:23:13,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 187 treesize of output 195 [2021-10-15 20:23:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:23:14,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243208053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:23:14,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:23:14,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-10-15 20:23:14,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212033317] [2021-10-15 20:23:14,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-15 20:23:14,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:23:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-15 20:23:14,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-10-15 20:23:14,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2021-10-15 20:23:14,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 244 flow. Second operand has 36 states, 36 states have (on average 14.5) internal successors, (522), 36 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:14,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:23:14,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2021-10-15 20:23:14,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:23:17,289 INFO L129 PetriNetUnfolder]: 9/84 cut-off events. [2021-10-15 20:23:17,289 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 20:23:17,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 84 events. 9/84 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 184. Up to 45 conditions per place. [2021-10-15 20:23:17,291 INFO L132 encePairwiseOnDemand]: 34/49 looper letters, 41 selfloop transitions, 21 changer transitions 0/69 dead transitions. [2021-10-15 20:23:17,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 69 transitions, 428 flow [2021-10-15 20:23:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:23:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:23:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 311 transitions. [2021-10-15 20:23:17,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3173469387755102 [2021-10-15 20:23:17,294 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 311 transitions. [2021-10-15 20:23:17,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 311 transitions. [2021-10-15 20:23:17,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:23:17,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 311 transitions. [2021-10-15 20:23:17,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 15.55) internal successors, (311), 20 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:17,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 49.0) internal successors, (1029), 21 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:17,299 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 49.0) internal successors, (1029), 21 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:17,299 INFO L186 Difference]: Start difference. First operand has 66 places, 53 transitions, 244 flow. Second operand 20 states and 311 transitions. [2021-10-15 20:23:17,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 69 transitions, 428 flow [2021-10-15 20:23:17,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 69 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:23:17,304 INFO L242 Difference]: Finished difference. Result has 92 places, 64 transitions, 371 flow [2021-10-15 20:23:17,304 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=371, PETRI_PLACES=92, PETRI_TRANSITIONS=64} [2021-10-15 20:23:17,305 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 65 predicate places. [2021-10-15 20:23:17,305 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 64 transitions, 371 flow [2021-10-15 20:23:17,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 14.5) internal successors, (522), 36 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:23:17,305 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:23:17,306 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:23:17,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:23:17,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:23:17,520 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:23:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:23:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1113172020, now seen corresponding path program 1 times [2021-10-15 20:23:17,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:23:17,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001560272] [2021-10-15 20:23:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:23:17,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:23:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:23:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:23:18,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:23:18,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001560272] [2021-10-15 20:23:18,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001560272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:23:18,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81054276] [2021-10-15 20:23:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:23:18,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:23:18,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:23:18,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:23:18,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:23:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:23:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 116 conjunts are in the unsatisfiable core [2021-10-15 20:23:19,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:23:19,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:23:19,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:23:19,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:23:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:19,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-10-15 20:23:19,747 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:23:19,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 20:23:19,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 32 [2021-10-15 20:23:20,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-10-15 20:23:20,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-10-15 20:23:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:20,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:23:20,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-10-15 20:23:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:20,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:23:20,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-10-15 20:23:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:20,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-10-15 20:23:20,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:20,486 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-10-15 20:23:20,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 233 treesize of output 169 [2021-10-15 20:23:20,519 INFO L354 Elim1Store]: treesize reduction 168, result has 13.8 percent of original size [2021-10-15 20:23:20,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 180 [2021-10-15 20:23:20,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:20,562 INFO L354 Elim1Store]: treesize reduction 138, result has 17.9 percent of original size [2021-10-15 20:23:20,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 149 [2021-10-15 20:23:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:21,352 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-10-15 20:23:21,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-10-15 20:23:21,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:21,699 INFO L354 Elim1Store]: treesize reduction 326, result has 8.2 percent of original size [2021-10-15 20:23:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 324 treesize of output 236 [2021-10-15 20:23:21,719 INFO L354 Elim1Store]: treesize reduction 109, result has 17.4 percent of original size [2021-10-15 20:23:21,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 308 [2021-10-15 20:23:21,740 INFO L354 Elim1Store]: treesize reduction 109, result has 17.4 percent of original size [2021-10-15 20:23:21,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 293 [2021-10-15 20:23:21,763 INFO L354 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2021-10-15 20:23:21,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 287 treesize of output 289 [2021-10-15 20:23:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:23:21,830 INFO L354 Elim1Store]: treesize reduction 614, result has 7.9 percent of original size [2021-10-15 20:23:21,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 276 treesize of output 250 [2021-10-15 20:23:23,679 INFO L354 Elim1Store]: treesize reduction 566, result has 12.7 percent of original size [2021-10-15 20:23:23,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 363 treesize of output 302 [2021-10-15 20:23:23,760 INFO L354 Elim1Store]: treesize reduction 136, result has 37.9 percent of original size [2021-10-15 20:23:23,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 429 treesize of output 452 [2021-10-15 20:23:23,783 INFO L354 Elim1Store]: treesize reduction 109, result has 17.4 percent of original size [2021-10-15 20:23:23,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 446 treesize of output 437 [2021-10-15 20:23:23,948 INFO L354 Elim1Store]: treesize reduction 810, result has 10.2 percent of original size [2021-10-15 20:23:23,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 431 treesize of output 380 [2021-10-15 20:25:51,798 INFO L354 Elim1Store]: treesize reduction 423, result has 19.7 percent of original size [2021-10-15 20:25:51,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 418 treesize of output 332 [2021-10-15 20:25:51,932 INFO L354 Elim1Store]: treesize reduction 392, result has 4.6 percent of original size [2021-10-15 20:25:51,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 305 treesize of output 235 [2021-10-15 20:25:52,816 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 20:25:52,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-10-15 20:25:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:25:52,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81054276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:52,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:25:52,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-10-15 20:25:52,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477364931] [2021-10-15 20:25:52,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-15 20:25:52,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:52,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-15 20:25:52,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1684, Unknown=1, NotChecked=0, Total=1806 [2021-10-15 20:25:52,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2021-10-15 20:25:52,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 64 transitions, 371 flow. Second operand has 43 states, 43 states have (on average 13.465116279069768) internal successors, (579), 43 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:52,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2021-10-15 20:25:52,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:41,489 INFO L129 PetriNetUnfolder]: 13/117 cut-off events. [2021-10-15 20:26:41,489 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2021-10-15 20:26:41,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 117 events. 13/117 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 236. Up to 17 conditions per place. [2021-10-15 20:26:41,492 INFO L132 encePairwiseOnDemand]: 28/49 looper letters, 45 selfloop transitions, 45 changer transitions 0/96 dead transitions. [2021-10-15 20:26:41,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 96 transitions, 696 flow [2021-10-15 20:26:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-15 20:26:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-10-15 20:26:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 581 transitions. [2021-10-15 20:26:41,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.289198606271777 [2021-10-15 20:26:41,502 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 581 transitions. [2021-10-15 20:26:41,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 581 transitions. [2021-10-15 20:26:41,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:41,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 581 transitions. [2021-10-15 20:26:41,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 14.170731707317072) internal successors, (581), 41 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:41,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 49.0) internal successors, (2058), 42 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:41,513 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 49.0) internal successors, (2058), 42 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:41,513 INFO L186 Difference]: Start difference. First operand has 92 places, 64 transitions, 371 flow. Second operand 41 states and 581 transitions. [2021-10-15 20:26:41,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 96 transitions, 696 flow [2021-10-15 20:26:41,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 96 transitions, 669 flow, removed 0 selfloop flow, removed 11 redundant places. [2021-10-15 20:26:41,522 INFO L242 Difference]: Finished difference. Result has 126 places, 73 transitions, 513 flow [2021-10-15 20:26:41,522 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=513, PETRI_PLACES=126, PETRI_TRANSITIONS=73} [2021-10-15 20:26:41,523 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 99 predicate places. [2021-10-15 20:26:41,523 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 73 transitions, 513 flow [2021-10-15 20:26:41,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.465116279069768) internal successors, (579), 43 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:41,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:41,524 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:41,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:41,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 20:26:41,748 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:41,749 INFO L82 PathProgramCache]: Analyzing trace with hash 148539776, now seen corresponding path program 1 times [2021-10-15 20:26:41,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:41,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14416281] [2021-10-15 20:26:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:41,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:43,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:43,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14416281] [2021-10-15 20:26:43,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14416281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:43,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226660864] [2021-10-15 20:26:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:43,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:43,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:43,046 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:43,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:26:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 115 conjunts are in the unsatisfiable core [2021-10-15 20:26:44,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:44,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:26:44,823 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:26:44,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 20:26:45,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:26:45,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:26:45,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:26:45,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2021-10-15 20:26:45,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:26:45,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 60 [2021-10-15 20:26:45,719 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-10-15 20:26:45,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-10-15 20:26:45,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:26:45,997 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-15 20:26:45,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 148 treesize of output 108 [2021-10-15 20:26:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:26:46,036 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-10-15 20:26:46,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 143 [2021-10-15 20:26:47,831 INFO L354 Elim1Store]: treesize reduction 576, result has 10.3 percent of original size [2021-10-15 20:26:47,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 29 case distinctions, treesize of input 414 treesize of output 231 [2021-10-15 20:26:48,049 INFO L354 Elim1Store]: treesize reduction 592, result has 8.9 percent of original size [2021-10-15 20:26:48,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 619 treesize of output 316 [2021-10-15 20:26:50,188 INFO L354 Elim1Store]: treesize reduction 236, result has 0.4 percent of original size [2021-10-15 20:26:50,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 653 treesize of output 274 [2021-10-15 20:26:50,602 INFO L354 Elim1Store]: treesize reduction 72, result has 25.8 percent of original size [2021-10-15 20:26:50,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 178 treesize of output 79 [2021-10-15 20:26:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:50,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226660864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:50,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:26:50,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-10-15 20:26:50,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398565831] [2021-10-15 20:26:50,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-15 20:26:50,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-15 20:26:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2021-10-15 20:26:50,691 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2021-10-15 20:26:50,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 73 transitions, 513 flow. Second operand has 45 states, 45 states have (on average 14.377777777777778) internal successors, (647), 45 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:50,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:50,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2021-10-15 20:26:50,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:09,552 INFO L129 PetriNetUnfolder]: 11/105 cut-off events. [2021-10-15 20:27:09,552 INFO L130 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2021-10-15 20:27:09,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 105 events. 11/105 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 162 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 345. Up to 17 conditions per place. [2021-10-15 20:27:09,554 INFO L132 encePairwiseOnDemand]: 29/49 looper letters, 25 selfloop transitions, 49 changer transitions 0/81 dead transitions. [2021-10-15 20:27:09,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 81 transitions, 703 flow [2021-10-15 20:27:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-15 20:27:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-15 20:27:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 432 transitions. [2021-10-15 20:27:09,558 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3040112596762843 [2021-10-15 20:27:09,558 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 432 transitions. [2021-10-15 20:27:09,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 432 transitions. [2021-10-15 20:27:09,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:09,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 432 transitions. [2021-10-15 20:27:09,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 14.89655172413793) internal successors, (432), 29 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:09,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 49.0) internal successors, (1470), 30 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:09,564 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 49.0) internal successors, (1470), 30 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:09,564 INFO L186 Difference]: Start difference. First operand has 126 places, 73 transitions, 513 flow. Second operand 29 states and 432 transitions. [2021-10-15 20:27:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 81 transitions, 703 flow [2021-10-15 20:27:09,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 81 transitions, 583 flow, removed 16 selfloop flow, removed 33 redundant places. [2021-10-15 20:27:09,574 INFO L242 Difference]: Finished difference. Result has 123 places, 73 transitions, 505 flow [2021-10-15 20:27:09,574 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=505, PETRI_PLACES=123, PETRI_TRANSITIONS=73} [2021-10-15 20:27:09,574 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2021-10-15 20:27:09,575 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 73 transitions, 505 flow [2021-10-15 20:27:09,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 14.377777777777778) internal successors, (647), 45 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:09,576 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:09,576 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:09,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:09,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:27:09,804 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:09,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:09,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1065828808, now seen corresponding path program 2 times [2021-10-15 20:27:09,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:09,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190629746] [2021-10-15 20:27:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:09,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:27:11,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:11,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190629746] [2021-10-15 20:27:11,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190629746] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:11,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264688595] [2021-10-15 20:27:11,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:27:11,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:11,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:11,748 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:11,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:27:12,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:27:12,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:27:12,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 103 conjunts are in the unsatisfiable core [2021-10-15 20:27:12,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:12,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:27:13,319 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 20:27:13,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-15 20:27:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:27:13,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-15 20:27:13,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:27:13,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-10-15 20:27:14,882 INFO L354 Elim1Store]: treesize reduction 268, result has 13.8 percent of original size [2021-10-15 20:27:14,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 361 treesize of output 180 [2021-10-15 20:27:14,958 INFO L354 Elim1Store]: treesize reduction 226, result has 17.8 percent of original size [2021-10-15 20:27:14,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 224 treesize of output 156 [2021-10-15 20:27:27,718 INFO L354 Elim1Store]: treesize reduction 211, result has 19.2 percent of original size [2021-10-15 20:27:27,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 327 treesize of output 238 [2021-10-15 20:27:27,773 INFO L354 Elim1Store]: treesize reduction 131, result has 10.9 percent of original size [2021-10-15 20:27:27,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 235 treesize of output 136 [2021-10-15 20:27:30,537 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-15 20:27:30,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 69 [2021-10-15 20:27:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:27:30,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264688595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:30,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:27:30,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 46 [2021-10-15 20:27:30,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973583795] [2021-10-15 20:27:30,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-15 20:27:30,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-15 20:27:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1947, Unknown=0, NotChecked=0, Total=2070 [2021-10-15 20:27:30,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2021-10-15 20:27:30,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 73 transitions, 505 flow. Second operand has 46 states, 46 states have (on average 13.5) internal successors, (621), 46 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:30,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:30,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2021-10-15 20:27:30,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:28:06,509 WARN L207 SmtUtils]: Spent 5.56 s on a formula simplification. DAG size of input: 251 DAG size of output: 212 [2021-10-15 20:28:22,705 WARN L207 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 246 DAG size of output: 208 [2021-10-15 20:28:32,114 WARN L207 SmtUtils]: Spent 9.17 s on a formula simplification. DAG size of input: 248 DAG size of output: 210 [2021-10-15 20:28:37,835 WARN L207 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 251 DAG size of output: 213 [2021-10-15 20:28:57,466 WARN L207 SmtUtils]: Spent 5.54 s on a formula simplification. DAG size of input: 277 DAG size of output: 220 [2021-10-15 20:29:02,498 INFO L129 PetriNetUnfolder]: 7/99 cut-off events. [2021-10-15 20:29:02,498 INFO L130 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2021-10-15 20:29:02,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 99 events. 7/99 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 143 event pairs, 0 based on Foata normal form. 2/97 useless extension candidates. Maximal degree in co-relation 339. Up to 12 conditions per place. [2021-10-15 20:29:02,500 INFO L132 encePairwiseOnDemand]: 30/49 looper letters, 26 selfloop transitions, 47 changer transitions 0/79 dead transitions. [2021-10-15 20:29:02,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 79 transitions, 679 flow [2021-10-15 20:29:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-15 20:29:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-15 20:29:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 426 transitions. [2021-10-15 20:29:02,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2804476629361422 [2021-10-15 20:29:02,503 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 426 transitions. [2021-10-15 20:29:02,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 426 transitions. [2021-10-15 20:29:02,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:29:02,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 426 transitions. [2021-10-15 20:29:02,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 13.741935483870968) internal successors, (426), 31 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:02,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 49.0) internal successors, (1568), 32 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:02,511 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 49.0) internal successors, (1568), 32 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:02,512 INFO L186 Difference]: Start difference. First operand has 123 places, 73 transitions, 505 flow. Second operand 31 states and 426 transitions. [2021-10-15 20:29:02,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 79 transitions, 679 flow [2021-10-15 20:29:02,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 79 transitions, 587 flow, removed 3 selfloop flow, removed 26 redundant places. [2021-10-15 20:29:02,523 INFO L242 Difference]: Finished difference. Result has 129 places, 75 transitions, 535 flow [2021-10-15 20:29:02,524 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=535, PETRI_PLACES=129, PETRI_TRANSITIONS=75} [2021-10-15 20:29:02,524 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 102 predicate places. [2021-10-15 20:29:02,524 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 75 transitions, 535 flow [2021-10-15 20:29:02,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 13.5) internal successors, (621), 46 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:02,525 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:29:02,525 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:29:02,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-15 20:29:02,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:29:02,748 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:29:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:29:02,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1319099796, now seen corresponding path program 2 times [2021-10-15 20:29:02,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:29:02,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814192543] [2021-10-15 20:29:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:29:02,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:29:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:29:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:29:03,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:29:03,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814192543] [2021-10-15 20:29:03,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814192543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:29:03,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896824719] [2021-10-15 20:29:03,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:29:03,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:29:03,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:29:03,840 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:29:03,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:29:04,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:29:04,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:29:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 115 conjunts are in the unsatisfiable core [2021-10-15 20:29:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:29:04,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:29:05,269 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:29:05,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 20:29:05,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:29:05,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:29:05,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:29:05,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 52 [2021-10-15 20:29:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:29:05,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 69 [2021-10-15 20:29:06,023 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-10-15 20:29:06,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-10-15 20:29:06,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:29:06,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:29:06,252 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-15 20:29:06,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 144 treesize of output 104 [2021-10-15 20:29:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:29:06,290 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-15 20:29:06,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 110 [2021-10-15 20:29:07,595 INFO L354 Elim1Store]: treesize reduction 344, result has 11.6 percent of original size [2021-10-15 20:29:07,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 475 treesize of output 267 [2021-10-15 20:29:07,725 INFO L354 Elim1Store]: treesize reduction 396, result has 11.4 percent of original size [2021-10-15 20:29:07,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 326 treesize of output 230 [2021-10-15 20:29:07,766 INFO L354 Elim1Store]: treesize reduction 102, result has 19.7 percent of original size [2021-10-15 20:29:07,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 239 treesize of output 200 [2021-10-15 20:29:15,556 INFO L354 Elim1Store]: treesize reduction 245, result has 4.7 percent of original size [2021-10-15 20:29:15,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 234 treesize of output 149 [2021-10-15 20:29:15,600 INFO L354 Elim1Store]: treesize reduction 174, result has 1.7 percent of original size [2021-10-15 20:29:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 107 treesize of output 69 [2021-10-15 20:29:15,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 20:29:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:29:15,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896824719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:29:15,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:29:15,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-10-15 20:29:15,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337225307] [2021-10-15 20:29:15,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-15 20:29:15,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:29:15,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-15 20:29:15,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1660, Unknown=3, NotChecked=0, Total=1806 [2021-10-15 20:29:15,709 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2021-10-15 20:29:15,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 75 transitions, 535 flow. Second operand has 43 states, 43 states have (on average 14.534883720930232) internal successors, (625), 43 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:15,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:29:15,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2021-10-15 20:29:15,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:29:37,120 INFO L129 PetriNetUnfolder]: 5/97 cut-off events. [2021-10-15 20:29:37,120 INFO L130 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2021-10-15 20:29:37,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 97 events. 5/97 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 341. Up to 12 conditions per place. [2021-10-15 20:29:37,121 INFO L132 encePairwiseOnDemand]: 31/49 looper letters, 29 selfloop transitions, 41 changer transitions 0/80 dead transitions. [2021-10-15 20:29:37,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 80 transitions, 689 flow [2021-10-15 20:29:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-15 20:29:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-15 20:29:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 403 transitions. [2021-10-15 20:29:37,126 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.30461073318216175 [2021-10-15 20:29:37,127 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 403 transitions. [2021-10-15 20:29:37,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 403 transitions. [2021-10-15 20:29:37,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:29:37,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 403 transitions. [2021-10-15 20:29:37,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 14.925925925925926) internal successors, (403), 27 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:37,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 49.0) internal successors, (1372), 28 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:37,136 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 49.0) internal successors, (1372), 28 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:37,136 INFO L186 Difference]: Start difference. First operand has 129 places, 75 transitions, 535 flow. Second operand 27 states and 403 transitions. [2021-10-15 20:29:37,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 80 transitions, 689 flow [2021-10-15 20:29:37,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 80 transitions, 594 flow, removed 5 selfloop flow, removed 25 redundant places. [2021-10-15 20:29:37,151 INFO L242 Difference]: Finished difference. Result has 132 places, 77 transitions, 538 flow [2021-10-15 20:29:37,152 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=538, PETRI_PLACES=132, PETRI_TRANSITIONS=77} [2021-10-15 20:29:37,152 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 105 predicate places. [2021-10-15 20:29:37,152 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 77 transitions, 538 flow [2021-10-15 20:29:37,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 14.534883720930232) internal successors, (625), 43 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:37,153 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:29:37,154 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:29:37,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:29:37,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:29:37,360 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:29:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:29:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1228857809, now seen corresponding path program 3 times [2021-10-15 20:29:37,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:29:37,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768581947] [2021-10-15 20:29:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:29:37,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:29:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:29:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:29:37,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:29:37,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768581947] [2021-10-15 20:29:37,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768581947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:29:37,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190862700] [2021-10-15 20:29:37,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:29:37,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:29:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:29:37,447 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:29:37,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:29:39,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 20:29:39,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:29:39,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:29:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:29:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:29:39,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190862700] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:29:39,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:29:39,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-10-15 20:29:39,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364162601] [2021-10-15 20:29:39,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:29:39,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:29:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:29:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:29:39,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 49 [2021-10-15 20:29:39,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 77 transitions, 538 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:39,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:29:39,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 49 [2021-10-15 20:29:39,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:29:39,482 INFO L129 PetriNetUnfolder]: 0/40 cut-off events. [2021-10-15 20:29:39,482 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2021-10-15 20:29:39,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 40 events. 0/40 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:29:39,482 INFO L132 encePairwiseOnDemand]: 46/49 looper letters, 3 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2021-10-15 20:29:39,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 39 transitions, 269 flow [2021-10-15 20:29:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:29:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:29:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2021-10-15 20:29:39,483 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448979591836735 [2021-10-15 20:29:39,484 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 207 transitions. [2021-10-15 20:29:39,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 207 transitions. [2021-10-15 20:29:39,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:29:39,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 207 transitions. [2021-10-15 20:29:39,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:39,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:39,486 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:39,486 INFO L186 Difference]: Start difference. First operand has 132 places, 77 transitions, 538 flow. Second operand 5 states and 207 transitions. [2021-10-15 20:29:39,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 39 transitions, 269 flow [2021-10-15 20:29:39,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 125 flow, removed 0 selfloop flow, removed 61 redundant places. [2021-10-15 20:29:39,490 INFO L242 Difference]: Finished difference. Result has 52 places, 39 transitions, 119 flow [2021-10-15 20:29:39,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2021-10-15 20:29:39,491 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2021-10-15 20:29:39,491 INFO L470 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 119 flow [2021-10-15 20:29:39,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:39,492 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:29:39,492 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:29:39,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:29:39,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:29:39,704 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:29:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:29:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2057580794, now seen corresponding path program 1 times [2021-10-15 20:29:39,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:29:39,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353223660] [2021-10-15 20:29:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:29:39,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:29:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:29:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-15 20:29:39,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:29:39,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353223660] [2021-10-15 20:29:39,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353223660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:29:39,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731415861] [2021-10-15 20:29:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:29:39,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:29:39,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:29:39,868 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:29:39,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:29:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:29:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:29:41,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:29:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-15 20:29:41,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731415861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:29:41,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:29:41,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-10-15 20:29:41,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450164226] [2021-10-15 20:29:41,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:29:41,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:29:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:29:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:29:41,192 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 49 [2021-10-15 20:29:41,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 119 flow. Second operand has 7 states, 7 states have (on average 38.857142857142854) internal successors, (272), 7 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:41,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:29:41,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 49 [2021-10-15 20:29:41,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:29:41,214 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-10-15 20:29:41,214 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 20:29:41,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 38 events. 0/38 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:29:41,214 INFO L132 encePairwiseOnDemand]: 44/49 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2021-10-15 20:29:41,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 37 transitions, 125 flow [2021-10-15 20:29:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:29:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:29:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 272 transitions. [2021-10-15 20:29:41,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.793002915451895 [2021-10-15 20:29:41,216 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 272 transitions. [2021-10-15 20:29:41,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 272 transitions. [2021-10-15 20:29:41,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:29:41,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 272 transitions. [2021-10-15 20:29:41,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 38.857142857142854) internal successors, (272), 7 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:41,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:41,218 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:41,218 INFO L186 Difference]: Start difference. First operand has 52 places, 39 transitions, 119 flow. Second operand 7 states and 272 transitions. [2021-10-15 20:29:41,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 37 transitions, 125 flow [2021-10-15 20:29:41,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 37 transitions, 120 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 20:29:41,220 INFO L242 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2021-10-15 20:29:41,220 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2021-10-15 20:29:41,220 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2021-10-15 20:29:41,220 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2021-10-15 20:29:41,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 38.857142857142854) internal successors, (272), 7 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:29:41,222 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:29:41,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:29:41,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 20:29:41,449 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:29:41,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:29:41 BoogieIcfgContainer [2021-10-15 20:29:41,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:29:41,454 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:29:41,455 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:29:41,455 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:29:41,455 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:37" (3/4) ... [2021-10-15 20:29:41,458 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:29:41,472 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-15 20:29:41,473 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-15 20:29:41,473 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:29:41,474 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:29:41,526 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:29:41,526 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:29:41,527 INFO L168 Benchmark]: Toolchain (without parser) took 485424.09 ms. Allocated memory was 115.3 MB in the beginning and 352.3 MB in the end (delta: 237.0 MB). Free memory was 72.2 MB in the beginning and 164.4 MB in the end (delta: -92.1 MB). Peak memory consumption was 143.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:29:41,528 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 89.9 MB in the end (delta: 62.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:29:41,528 INFO L168 Benchmark]: CACSL2BoogieTranslator took 512.69 ms. Allocated memory is still 115.3 MB. Free memory was 72.0 MB in the beginning and 82.1 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:29:41,529 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.20 ms. Allocated memory is still 115.3 MB. Free memory was 82.1 MB in the beginning and 80.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:29:41,529 INFO L168 Benchmark]: Boogie Preprocessor took 34.20 ms. Allocated memory is still 115.3 MB. Free memory was 80.0 MB in the beginning and 78.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:29:41,530 INFO L168 Benchmark]: RCFGBuilder took 532.52 ms. Allocated memory is still 115.3 MB. Free memory was 78.3 MB in the beginning and 62.9 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:29:41,530 INFO L168 Benchmark]: TraceAbstraction took 484206.29 ms. Allocated memory was 115.3 MB in the beginning and 352.3 MB in the end (delta: 237.0 MB). Free memory was 62.3 MB in the beginning and 167.5 MB in the end (delta: -105.2 MB). Peak memory consumption was 134.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:29:41,531 INFO L168 Benchmark]: Witness Printer took 72.03 ms. Allocated memory is still 352.3 MB. Free memory was 167.5 MB in the beginning and 164.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:29:41,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 89.9 MB in the end (delta: 62.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 512.69 ms. Allocated memory is still 115.3 MB. Free memory was 72.0 MB in the beginning and 82.1 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.20 ms. Allocated memory is still 115.3 MB. Free memory was 82.1 MB in the beginning and 80.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.20 ms. Allocated memory is still 115.3 MB. Free memory was 80.0 MB in the beginning and 78.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 532.52 ms. Allocated memory is still 115.3 MB. Free memory was 78.3 MB in the beginning and 62.9 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 484206.29 ms. Allocated memory was 115.3 MB in the beginning and 352.3 MB in the end (delta: 237.0 MB). Free memory was 62.3 MB in the beginning and 167.5 MB in the end (delta: -105.2 MB). Peak memory consumption was 134.4 MB. Max. memory is 16.1 GB. * Witness Printer took 72.03 ms. Allocated memory is still 352.3 MB. Free memory was 167.5 MB in the beginning and 164.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 645]: 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 CFG has 1 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 484089.2ms, OverallIterations: 15, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 199122.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 83.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 65 SDtfs, 1848 SDslu, 368 SDs, 0 SdLazy, 5903 SolverSat, 1008 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 70255.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 742 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6149 ImplicationChecksByTransitivity, 150537.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=538occurred in iteration=13, InterpolantAutomatonStates: 256, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 250.1ms SsaConstructionTime, 2942.8ms SatisfiabilityAnalysisTime, 273643.5ms InterpolantComputationTime, 804 NumberOfCodeBlocks, 804 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 779 ConstructedInterpolants, 65 QuantifiedInterpolants, 37659 SizeOfPredicates, 276 NumberOfNonLiveVariables, 2444 ConjunctsInSsa, 739 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 142/307 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! [2021-10-15 20:29:41,758 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-15 20:29:41,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa37d2-c36c-4207-a2c4-700b6c7e840d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...