./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --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_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/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_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/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_df0d23e5-7312-4b57-a104-a005c6ac42ba/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 f4be101f7178215c00042c8ccd8c0b0b352a1fbf ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:14:07,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:14:07,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:14:07,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:14:07,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:14:07,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:14:07,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:14:07,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:14:07,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:14:07,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:14:07,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:14:07,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:14:07,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:14:07,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:14:07,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:14:07,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:14:07,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:14:07,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:14:07,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:14:07,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:14:07,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:14:07,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:14:07,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:14:07,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:14:07,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:14:07,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:14:07,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:14:07,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:14:07,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:14:07,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:14:07,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:14:07,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:14:07,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:14:07,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:14:07,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:14:07,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:14:07,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:14:07,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:14:07,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:14:07,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:14:07,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:14:07,838 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:14:07,872 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:14:07,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:14:07,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:14:07,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:14:07,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:14:07,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:14:07,876 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:14:07,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:14:07,876 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:14:07,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:14:07,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:14:07,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:14:07,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:14:07,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:14:07,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:14:07,878 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:14:07,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:14:07,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:14:07,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:14:07,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:14:07,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:14:07,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:14:07,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:14:07,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:14:07,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:14:07,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:14:07,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:14:07,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:14:07,882 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:14:07,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:14:07,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:14:07,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:14:07,883 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_df0d23e5-7312-4b57-a104-a005c6ac42ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4be101f7178215c00042c8ccd8c0b0b352a1fbf [2021-10-15 19:14:08,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:14:08,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:14:08,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:14:08,271 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:14:08,272 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:14:08,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-10-15 19:14:08,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/data/6477e53ed/28f015fb0afe40e5850cf316db72b825/FLAGa9c1f8be9 [2021-10-15 19:14:08,931 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:14:08,932 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2021-10-15 19:14:08,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/data/6477e53ed/28f015fb0afe40e5850cf316db72b825/FLAGa9c1f8be9 [2021-10-15 19:14:09,247 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/data/6477e53ed/28f015fb0afe40e5850cf316db72b825 [2021-10-15 19:14:09,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:14:09,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:14:09,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:14:09,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:14:09,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:14:09,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e6d72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09, skipping insertion in model container [2021-10-15 19:14:09,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:14:09,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:14:09,517 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_df0d23e5-7312-4b57-a104-a005c6ac42ba/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-10-15 19:14:09,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:14:09,546 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:14:09,561 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_df0d23e5-7312-4b57-a104-a005c6ac42ba/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2021-10-15 19:14:09,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:14:09,586 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:14:09,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09 WrapperNode [2021-10-15 19:14:09,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:14:09,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:14:09,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:14:09,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:14:09,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:14:09,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:14:09,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:14:09,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:14:09,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:14:09,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:14:09,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:14:09,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:14:09,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (1/1) ... [2021-10-15 19:14:09,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:14:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:14:09,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:14:09,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:14:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:14:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:14:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:14:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:14:09,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:14:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:14:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:14:10,050 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:14:10,050 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-15 19:14:10,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:14:10 BoogieIcfgContainer [2021-10-15 19:14:10,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:14:10,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:14:10,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:14:10,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:14:10,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:14:09" (1/3) ... [2021-10-15 19:14:10,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5308a341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:14:10, skipping insertion in model container [2021-10-15 19:14:10,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:14:09" (2/3) ... [2021-10-15 19:14:10,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5308a341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:14:10, skipping insertion in model container [2021-10-15 19:14:10,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:14:10" (3/3) ... [2021-10-15 19:14:10,074 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2021-10-15 19:14:10,082 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:14:10,082 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:14:10,145 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:14:10,154 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 19:14:10,155 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:14:10,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 33 transitions, 66 flow [2021-10-15 19:14:10,196 INFO L129 PetriNetUnfolder]: 10/33 cut-off events. [2021-10-15 19:14:10,196 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:14:10,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 33 events. 10/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:14:10,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 33 transitions, 66 flow [2021-10-15 19:14:10,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 28 transitions, 56 flow [2021-10-15 19:14:10,210 INFO L129 PetriNetUnfolder]: 9/27 cut-off events. [2021-10-15 19:14:10,210 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:14:10,210 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:14:10,211 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:14:10,212 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:14:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:14:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1098106774, now seen corresponding path program 1 times [2021-10-15 19:14:10,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:14:10,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877220790] [2021-10-15 19:14:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:14:10,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:14:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:14:10,426 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 19:14:10,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:14:10,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877220790] [2021-10-15 19:14:10,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877220790] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:14:10,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:14:10,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:14:10,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122985397] [2021-10-15 19:14:10,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:14:10,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:14:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:14:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:14:10,485 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 33 [2021-10-15 19:14:10,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 28 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 19:14:10,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:14:10,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 33 [2021-10-15 19:14:10,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:14:10,516 INFO L129 PetriNetUnfolder]: 3/22 cut-off events. [2021-10-15 19:14:10,517 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:14:10,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 6/25 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2021-10-15 19:14:10,536 INFO L132 encePairwiseOnDemand]: 27/33 looper letters, 0 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2021-10-15 19:14:10,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 44 flow [2021-10-15 19:14:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:14:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:14:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 58 transitions. [2021-10-15 19:14:10,566 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8787878787878788 [2021-10-15 19:14:10,582 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 58 transitions. [2021-10-15 19:14:10,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 58 transitions. [2021-10-15 19:14:10,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:14:10,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 58 transitions. [2021-10-15 19:14:10,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 19:14:10,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 19:14:10,597 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 19:14:10,600 INFO L186 Difference]: Start difference. First operand has 20 places, 28 transitions, 56 flow. Second operand 2 states and 58 transitions. [2021-10-15 19:14:10,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 44 flow [2021-10-15 19:14:10,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 44 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:14:10,620 INFO L242 Difference]: Finished difference. Result has 21 places, 22 transitions, 44 flow [2021-10-15 19:14:10,623 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=21, PETRI_TRANSITIONS=22} [2021-10-15 19:14:10,624 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-10-15 19:14:10,624 INFO L470 AbstractCegarLoop]: Abstraction has has 21 places, 22 transitions, 44 flow [2021-10-15 19:14:10,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 19:14:10,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:14:10,625 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:14:10,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:14:10,626 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:14:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:14:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1395197259, now seen corresponding path program 1 times [2021-10-15 19:14:10,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:14:10,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424106319] [2021-10-15 19:14:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:14:10,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:14:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:14:10,738 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 19:14:10,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:14:10,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424106319] [2021-10-15 19:14:10,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424106319] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:14:10,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:14:10,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:14:10,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031186466] [2021-10-15 19:14:10,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:14:10,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:14:10,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:14:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:14:10,753 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2021-10-15 19:14:10,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 22 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 19:14:10,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:14:10,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2021-10-15 19:14:10,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:14:10,834 INFO L129 PetriNetUnfolder]: 3/32 cut-off events. [2021-10-15 19:14:10,835 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:14:10,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 32 events. 3/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 50. Up to 13 conditions per place. [2021-10-15 19:14:10,836 INFO L132 encePairwiseOnDemand]: 26/33 looper letters, 13 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2021-10-15 19:14:10,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 27 transitions, 90 flow [2021-10-15 19:14:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:14:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:14:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2021-10-15 19:14:10,839 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2021-10-15 19:14:10,840 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 68 transitions. [2021-10-15 19:14:10,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 68 transitions. [2021-10-15 19:14:10,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:14:10,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 68 transitions. [2021-10-15 19:14:10,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 19:14:10,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 19:14:10,844 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 19:14:10,845 INFO L186 Difference]: Start difference. First operand has 21 places, 22 transitions, 44 flow. Second operand 4 states and 68 transitions. [2021-10-15 19:14:10,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 27 transitions, 90 flow [2021-10-15 19:14:10,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:14:10,849 INFO L242 Difference]: Finished difference. Result has 25 places, 24 transitions, 70 flow [2021-10-15 19:14:10,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2021-10-15 19:14:10,850 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-10-15 19:14:10,850 INFO L470 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 70 flow [2021-10-15 19:14:10,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 19:14:10,851 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:14:10,851 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 19:14:10,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:14:10,852 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:14:10,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:14:10,853 INFO L82 PathProgramCache]: Analyzing trace with hash 888694178, now seen corresponding path program 1 times [2021-10-15 19:14:10,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:14:10,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818697478] [2021-10-15 19:14:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:14:10,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:14:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:14:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:14:11,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:14:11,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818697478] [2021-10-15 19:14:11,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818697478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:14:11,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140668740] [2021-10-15 19:14:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:14:11,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:14:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:14:11,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:14:11,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:14:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:14:11,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:14:11,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:14:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:14:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140668740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:14:11,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:14:11,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-15 19:14:11,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826021552] [2021-10-15 19:14:11,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:14:11,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:14:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:14:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:14:11,486 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2021-10-15 19:14:11,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 19:14:11,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:14:11,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2021-10-15 19:14:11,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:14:11,588 INFO L129 PetriNetUnfolder]: 3/48 cut-off events. [2021-10-15 19:14:11,589 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:14:11,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 48 events. 3/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 26 event pairs, 0 based on Foata normal form. 2/48 useless extension candidates. Maximal degree in co-relation 86. Up to 13 conditions per place. [2021-10-15 19:14:11,590 INFO L132 encePairwiseOnDemand]: 24/33 looper letters, 16 selfloop transitions, 9 changer transitions 0/34 dead transitions. [2021-10-15 19:14:11,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 144 flow [2021-10-15 19:14:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:14:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:14:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2021-10-15 19:14:11,594 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2021-10-15 19:14:11,594 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 87 transitions. [2021-10-15 19:14:11,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 87 transitions. [2021-10-15 19:14:11,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:14:11,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 87 transitions. [2021-10-15 19:14:11,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 19:14:11,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 19:14:11,599 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 19:14:11,599 INFO L186 Difference]: Start difference. First operand has 25 places, 24 transitions, 70 flow. Second operand 5 states and 87 transitions. [2021-10-15 19:14:11,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 144 flow [2021-10-15 19:14:11,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 34 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:14:11,604 INFO L242 Difference]: Finished difference. Result has 28 places, 27 transitions, 108 flow [2021-10-15 19:14:11,604 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2021-10-15 19:14:11,605 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2021-10-15 19:14:11,605 INFO L470 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 108 flow [2021-10-15 19:14:11,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 19:14:11,606 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:14:11,606 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:14:11,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:14:11,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-15 19:14:11,834 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:14:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:14:11,835 INFO L82 PathProgramCache]: Analyzing trace with hash 595210895, now seen corresponding path program 2 times [2021-10-15 19:14:11,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:14:11,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458497478] [2021-10-15 19:14:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:14:11,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:14:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:14:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:14:12,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:14:12,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458497478] [2021-10-15 19:14:12,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458497478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:14:12,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248999592] [2021-10-15 19:14:12,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:14:12,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:14:12,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:14:12,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:14:12,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:14:12,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:14:12,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:14:12,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:14:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:14:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:14:12,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248999592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:14:12,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:14:12,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-15 19:14:12,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853852837] [2021-10-15 19:14:12,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:14:12,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:14:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:14:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:14:12,580 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2021-10-15 19:14:12,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 108 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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 19:14:12,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:14:12,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2021-10-15 19:14:12,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:14:12,740 INFO L129 PetriNetUnfolder]: 3/64 cut-off events. [2021-10-15 19:14:12,741 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-10-15 19:14:12,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 64 events. 3/64 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 29 event pairs, 0 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 128. Up to 13 conditions per place. [2021-10-15 19:14:12,742 INFO L132 encePairwiseOnDemand]: 24/33 looper letters, 20 selfloop transitions, 12 changer transitions 0/41 dead transitions. [2021-10-15 19:14:12,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 210 flow [2021-10-15 19:14:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:14:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:14:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2021-10-15 19:14:12,746 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5353535353535354 [2021-10-15 19:14:12,746 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 106 transitions. [2021-10-15 19:14:12,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 106 transitions. [2021-10-15 19:14:12,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:14:12,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 106 transitions. [2021-10-15 19:14:12,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 19:14:12,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:14:12,751 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:14:12,752 INFO L186 Difference]: Start difference. First operand has 28 places, 27 transitions, 108 flow. Second operand 6 states and 106 transitions. [2021-10-15 19:14:12,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 210 flow [2021-10-15 19:14:12,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 194 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-10-15 19:14:12,757 INFO L242 Difference]: Finished difference. Result has 31 places, 30 transitions, 148 flow [2021-10-15 19:14:12,758 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2021-10-15 19:14:12,758 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2021-10-15 19:14:12,759 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 148 flow [2021-10-15 19:14:12,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 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 19:14:12,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:14:12,760 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:14:12,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:14:12,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:14:12,986 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:14:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:14:12,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1584836228, now seen corresponding path program 3 times [2021-10-15 19:14:12,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:14:12,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634184073] [2021-10-15 19:14:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:14:12,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:14:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:14:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:14:13,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:14:13,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634184073] [2021-10-15 19:14:13,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634184073] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:14:13,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825454947] [2021-10-15 19:14:13,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:14:13,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:14:13,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:14:13,214 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:14:13,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:14:13,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:14:13,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:14:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:14:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:14:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-15 19:14:13,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825454947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:14:13,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:14:13,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-15 19:14:13,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119619447] [2021-10-15 19:14:13,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:14:13,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:14:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:14:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:14:13,790 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2021-10-15 19:14:13,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 148 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 19:14:13,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:14:13,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2021-10-15 19:14:13,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:14:13,983 INFO L129 PetriNetUnfolder]: 3/80 cut-off events. [2021-10-15 19:14:13,983 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2021-10-15 19:14:13,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 80 events. 3/80 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 33 event pairs, 0 based on Foata normal form. 2/78 useless extension candidates. Maximal degree in co-relation 171. Up to 15 conditions per place. [2021-10-15 19:14:13,985 INFO L132 encePairwiseOnDemand]: 24/33 looper letters, 24 selfloop transitions, 15 changer transitions 0/48 dead transitions. [2021-10-15 19:14:13,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 278 flow [2021-10-15 19:14:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:14:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:14:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2021-10-15 19:14:13,988 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2021-10-15 19:14:13,988 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 125 transitions. [2021-10-15 19:14:13,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 125 transitions. [2021-10-15 19:14:13,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:14:13,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 125 transitions. [2021-10-15 19:14:13,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 19:14:13,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 19:14:13,992 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 19:14:13,992 INFO L186 Difference]: Start difference. First operand has 31 places, 30 transitions, 148 flow. Second operand 7 states and 125 transitions. [2021-10-15 19:14:13,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 278 flow [2021-10-15 19:14:13,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 48 transitions, 250 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-10-15 19:14:13,998 INFO L242 Difference]: Finished difference. Result has 34 places, 33 transitions, 188 flow [2021-10-15 19:14:13,998 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2021-10-15 19:14:13,999 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2021-10-15 19:14:13,999 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 188 flow [2021-10-15 19:14:13,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 19:14:14,000 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:14:14,000 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:14:14,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:14:14,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:14:14,226 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:14:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:14:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2033536407, now seen corresponding path program 4 times [2021-10-15 19:14:14,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:14:14,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927976176] [2021-10-15 19:14:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:14:14,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:14:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:14:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:14:14,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:14:14,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927976176] [2021-10-15 19:14:14,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927976176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:14:14,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142398192] [2021-10-15 19:14:14,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:14:14,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:14:14,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:14:14,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:14:14,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:14:14,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:14:14,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:14:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-15 19:14:14,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:14:14,633 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 19:14:14,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-10-15 19:14:15,076 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 43 treesize of output 26 [2021-10-15 19:14:15,379 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-15 19:14:15,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 44 [2021-10-15 19:14:15,678 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-15 19:14:15,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 47 [2021-10-15 19:14:15,844 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-15 19:14:15,846 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 59 [2021-10-15 19:14:16,059 INFO L354 Elim1Store]: treesize reduction 136, result has 8.1 percent of original size [2021-10-15 19:14:16,060 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 7 new quantified variables, introduced 7 case distinctions, treesize of input 83 treesize of output 100 [2021-10-15 19:14:16,361 INFO L354 Elim1Store]: treesize reduction 144, result has 10.6 percent of original size [2021-10-15 19:14:16,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 91 treesize of output 99 [2021-10-15 19:14:17,222 INFO L354 Elim1Store]: treesize reduction 1310, result has 7.4 percent of original size [2021-10-15 19:14:17,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 134 treesize of output 157 [2021-10-15 19:14:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:14:18,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142398192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:14:18,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:14:18,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18] total 24 [2021-10-15 19:14:18,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996147627] [2021-10-15 19:14:18,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-15 19:14:18,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:14:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-15 19:14:18,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-10-15 19:14:18,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2021-10-15 19:14:18,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 188 flow. Second operand has 24 states, 24 states have (on average 9.625) internal successors, (231), 24 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:14:18,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:14:18,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2021-10-15 19:14:18,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:14:25,126 INFO L129 PetriNetUnfolder]: 2/65 cut-off events. [2021-10-15 19:14:25,126 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2021-10-15 19:14:25,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 65 events. 2/65 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 16 event pairs, 0 based on Foata normal form. 3/68 useless extension candidates. Maximal degree in co-relation 185. Up to 11 conditions per place. [2021-10-15 19:14:25,127 INFO L132 encePairwiseOnDemand]: 21/33 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2021-10-15 19:14:25,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 370 flow [2021-10-15 19:14:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-15 19:14:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-15 19:14:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 212 transitions. [2021-10-15 19:14:25,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2676767676767677 [2021-10-15 19:14:25,132 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 212 transitions. [2021-10-15 19:14:25,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 212 transitions. [2021-10-15 19:14:25,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:14:25,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 212 transitions. [2021-10-15 19:14:25,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.833333333333334) internal successors, (212), 24 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 19:14:25,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 33.0) internal successors, (825), 25 states have internal predecessors, (825), 0 states have call successors, (0), 0 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 19:14:25,140 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 33.0) internal successors, (825), 25 states have internal predecessors, (825), 0 states have call successors, (0), 0 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 19:14:25,140 INFO L186 Difference]: Start difference. First operand has 34 places, 33 transitions, 188 flow. Second operand 24 states and 212 transitions. [2021-10-15 19:14:25,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 370 flow [2021-10-15 19:14:25,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 65 transitions, 340 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-10-15 19:14:25,145 INFO L242 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2021-10-15 19:14:25,145 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2021-10-15 19:14:25,146 INFO L334 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2021-10-15 19:14:25,146 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2021-10-15 19:14:25,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 24 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:14:25,150 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:14:25,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:14:25,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 19:14:25,370 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:14:25,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:14:25 BoogieIcfgContainer [2021-10-15 19:14:25,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:14:25,377 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:14:25,377 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:14:25,377 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:14:25,378 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:14:10" (3/4) ... [2021-10-15 19:14:25,381 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:14:25,393 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-15 19:14:25,394 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:14:25,394 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:14:25,394 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:14:25,453 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:14:25,454 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:14:25,455 INFO L168 Benchmark]: Toolchain (without parser) took 16202.43 ms. Allocated memory was 113.2 MB in the beginning and 182.5 MB in the end (delta: 69.2 MB). Free memory was 76.6 MB in the beginning and 104.4 MB in the end (delta: -27.8 MB). Peak memory consumption was 40.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:14:25,456 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 113.2 MB. Free memory was 93.0 MB in the beginning and 92.9 MB in the end (delta: 119.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:14:25,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.31 ms. Allocated memory is still 113.2 MB. Free memory was 76.4 MB in the beginning and 88.4 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:14:25,457 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.55 ms. Allocated memory is still 113.2 MB. Free memory was 88.4 MB in the beginning and 87.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:14:25,458 INFO L168 Benchmark]: Boogie Preprocessor took 36.07 ms. Allocated memory is still 113.2 MB. Free memory was 87.0 MB in the beginning and 85.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:14:25,469 INFO L168 Benchmark]: RCFGBuilder took 384.74 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 74.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:14:25,470 INFO L168 Benchmark]: TraceAbstraction took 15320.47 ms. Allocated memory was 113.2 MB in the beginning and 182.5 MB in the end (delta: 69.2 MB). Free memory was 74.4 MB in the beginning and 107.3 MB in the end (delta: -32.9 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:14:25,471 INFO L168 Benchmark]: Witness Printer took 77.28 ms. Allocated memory is still 182.5 MB. Free memory was 107.3 MB in the beginning and 104.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:14:25,474 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 113.2 MB. Free memory was 93.0 MB in the beginning and 92.9 MB in the end (delta: 119.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.31 ms. Allocated memory is still 113.2 MB. Free memory was 76.4 MB in the beginning and 88.4 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.55 ms. Allocated memory is still 113.2 MB. Free memory was 88.4 MB in the beginning and 87.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.07 ms. Allocated memory is still 113.2 MB. Free memory was 87.0 MB in the beginning and 85.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 384.74 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 74.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15320.47 ms. Allocated memory was 113.2 MB in the beginning and 182.5 MB in the end (delta: 69.2 MB). Free memory was 74.4 MB in the beginning and 107.3 MB in the end (delta: -32.9 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. * Witness Printer took 77.28 ms. Allocated memory is still 182.5 MB. Free memory was 107.3 MB in the beginning and 104.4 MB in the end (delta: 2.9 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: 8]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 15231.1ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 7561.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 48.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 242 SDslu, 170 SDs, 0 SdLazy, 467 SolverSat, 172 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4882.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2938.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=188occurred in iteration=5, InterpolantAutomatonStates: 48, 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: 82.2ms SsaConstructionTime, 459.4ms SatisfiabilityAnalysisTime, 5598.2ms InterpolantComputationTime, 290 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 280 ConstructedInterpolants, 4 QuantifiedInterpolants, 2708 SizeOfPredicates, 20 NumberOfNonLiveVariables, 495 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 52/240 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 19:14:25,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df0d23e5-7312-4b57-a104-a005c6ac42ba/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...