./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label16.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_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/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_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/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_8fc94d87-103f-4458-a5b8-737cab643c4d/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 dbca4b5b174189007613ea278f8944581c9bfa1f ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:53:24,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:53:24,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:53:24,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:53:24,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:53:24,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:53:24,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:53:24,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:53:24,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:53:24,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:53:24,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:53:24,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:53:24,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:53:24,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:53:24,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:53:24,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:53:24,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:53:24,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:53:24,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:53:24,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:53:24,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:53:24,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:53:24,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:53:24,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:53:24,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:53:24,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:53:24,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:53:24,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:53:24,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:53:24,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:53:24,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:53:24,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:53:24,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:53:24,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:53:24,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:53:24,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:53:24,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:53:24,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:53:24,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:53:24,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:53:24,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:53:24,709 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:53:24,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:53:24,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:53:24,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:53:24,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:53:24,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:53:24,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:53:24,754 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:53:24,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:53:24,755 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:53:24,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:53:24,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:53:24,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:53:24,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:53:24,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:53:24,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:53:24,757 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:53:24,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:53:24,758 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:53:24,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:53:24,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:53:24,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:53:24,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:53:24,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:53:24,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:53:24,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:53:24,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:53:24,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:53:24,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:53:24,760 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:53:24,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:53:24,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:53:24,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:53:24,762 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_8fc94d87-103f-4458-a5b8-737cab643c4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbca4b5b174189007613ea278f8944581c9bfa1f [2021-10-15 19:53:25,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:53:25,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:53:25,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:53:25,089 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:53:25,090 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:53:25,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem11_label16.c [2021-10-15 19:53:25,159 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/data/d73be5553/cdb1576114504d45bd256f04061aaf1b/FLAG114f4fa6d [2021-10-15 19:53:25,795 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:53:25,796 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/sv-benchmarks/c/eca-rers2012/Problem11_label16.c [2021-10-15 19:53:25,811 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/data/d73be5553/cdb1576114504d45bd256f04061aaf1b/FLAG114f4fa6d [2021-10-15 19:53:26,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/data/d73be5553/cdb1576114504d45bd256f04061aaf1b [2021-10-15 19:53:26,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:53:26,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:53:26,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:53:26,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:53:26,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:53:26,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:53:26" (1/1) ... [2021-10-15 19:53:26,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a3276b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:26, skipping insertion in model container [2021-10-15 19:53:26,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:53:26" (1/1) ... [2021-10-15 19:53:26,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:53:26,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:53:26,472 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_8fc94d87-103f-4458-a5b8-737cab643c4d/sv-benchmarks/c/eca-rers2012/Problem11_label16.c[6270,6283] [2021-10-15 19:53:26,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:53:26,853 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:53:26,892 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_8fc94d87-103f-4458-a5b8-737cab643c4d/sv-benchmarks/c/eca-rers2012/Problem11_label16.c[6270,6283] [2021-10-15 19:53:27,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:53:27,071 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:53:27,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27 WrapperNode [2021-10-15 19:53:27,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:53:27,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:53:27,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:53:27,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:53:27,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:53:27,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:53:27,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:53:27,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:53:27,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:53:27,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:53:27,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:53:27,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:53:27,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (1/1) ... [2021-10-15 19:53:27,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:53:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:53:27,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:53:27,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:53:27,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:53:27,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:53:27,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:53:27,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:53:29,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:53:29,347 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:53:29,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:53:29 BoogieIcfgContainer [2021-10-15 19:53:29,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:53:29,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:53:29,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:53:29,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:53:29,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:53:26" (1/3) ... [2021-10-15 19:53:29,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfde7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:53:29, skipping insertion in model container [2021-10-15 19:53:29,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:53:27" (2/3) ... [2021-10-15 19:53:29,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfde7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:53:29, skipping insertion in model container [2021-10-15 19:53:29,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:53:29" (3/3) ... [2021-10-15 19:53:29,361 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label16.c [2021-10-15 19:53:29,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:53:29,367 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:53:29,431 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:53:29,441 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 19:53:29,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:53:29,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 283 places, 482 transitions, 964 flow [2021-10-15 19:53:29,621 INFO L129 PetriNetUnfolder]: 200/482 cut-off events. [2021-10-15 19:53:29,622 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:53:29,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 482 events. 200/482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 334 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 0. Up to 121 conditions per place. [2021-10-15 19:53:29,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 283 places, 482 transitions, 964 flow [2021-10-15 19:53:29,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 477 transitions, 954 flow [2021-10-15 19:53:29,659 INFO L129 PetriNetUnfolder]: 39/120 cut-off events. [2021-10-15 19:53:29,659 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:53:29,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:53:29,660 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:53:29,661 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:53:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:53:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2021-10-15 19:53:29,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:53:29,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377497852] [2021-10-15 19:53:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:29,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:53:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:29,985 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 19:53:29,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:53:29,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377497852] [2021-10-15 19:53:29,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377497852] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:53:29,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:53:29,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:53:29,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156092293] [2021-10-15 19:53:30,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:53:30,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:53:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:53:30,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:53:30,021 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 19:53:30,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 477 transitions, 954 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 19:53:30,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:53:30,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 19:53:30,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:53:31,453 INFO L129 PetriNetUnfolder]: 190/678 cut-off events. [2021-10-15 19:53:31,454 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:53:31,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 678 events. 190/678 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 838 event pairs, 0 based on Foata normal form. 77/497 useless extension candidates. Maximal degree in co-relation 2. Up to 418 conditions per place. [2021-10-15 19:53:31,466 INFO L132 encePairwiseOnDemand]: 259/482 looper letters, 517 selfloop transitions, 50 changer transitions 76/670 dead transitions. [2021-10-15 19:53:31,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 670 transitions, 2626 flow [2021-10-15 19:53:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:53:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:53:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 928 transitions. [2021-10-15 19:53:31,490 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6417704011065007 [2021-10-15 19:53:31,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 928 transitions. [2021-10-15 19:53:31,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 928 transitions. [2021-10-15 19:53:31,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:53:31,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 928 transitions. [2021-10-15 19:53:31,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 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 19:53:31,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:31,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:31,523 INFO L186 Difference]: Start difference. First operand has 280 places, 477 transitions, 954 flow. Second operand 3 states and 928 transitions. [2021-10-15 19:53:31,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 670 transitions, 2626 flow [2021-10-15 19:53:31,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 670 transitions, 2626 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:53:31,555 INFO L242 Difference]: Finished difference. Result has 284 places, 397 transitions, 1212 flow [2021-10-15 19:53:31,558 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1212, PETRI_PLACES=284, PETRI_TRANSITIONS=397} [2021-10-15 19:53:31,559 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, 4 predicate places. [2021-10-15 19:53:31,560 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 397 transitions, 1212 flow [2021-10-15 19:53:31,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 19:53:31,561 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:53:31,562 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:53:31,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:53:31,562 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:53:31,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:53:31,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1685692488, now seen corresponding path program 1 times [2021-10-15 19:53:31,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:53:31,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50368261] [2021-10-15 19:53:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:31,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:53:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:53:31,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:53:31,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50368261] [2021-10-15 19:53:31,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50368261] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:53:31,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:53:31,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:53:31,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400851902] [2021-10-15 19:53:31,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:53:31,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:53:31,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:53:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:53:31,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 19:53:31,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 397 transitions, 1212 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 19:53:31,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:53:31,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 19:53:31,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:53:33,121 INFO L129 PetriNetUnfolder]: 319/1122 cut-off events. [2021-10-15 19:53:33,121 INFO L130 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2021-10-15 19:53:33,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2549 conditions, 1122 events. 319/1122 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2445 event pairs, 0 based on Foata normal form. 53/1094 useless extension candidates. Maximal degree in co-relation 816. Up to 544 conditions per place. [2021-10-15 19:53:33,132 INFO L132 encePairwiseOnDemand]: 344/482 looper letters, 528 selfloop transitions, 155 changer transitions 0/705 dead transitions. [2021-10-15 19:53:33,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 705 transitions, 3462 flow [2021-10-15 19:53:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:53:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:53:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2021-10-15 19:53:33,136 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5055325034578146 [2021-10-15 19:53:33,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2021-10-15 19:53:33,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2021-10-15 19:53:33,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:53:33,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2021-10-15 19:53:33,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:53:33,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:33,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:33,147 INFO L186 Difference]: Start difference. First operand has 284 places, 397 transitions, 1212 flow. Second operand 3 states and 731 transitions. [2021-10-15 19:53:33,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 705 transitions, 3462 flow [2021-10-15 19:53:33,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 705 transitions, 3298 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:53:33,179 INFO L242 Difference]: Finished difference. Result has 226 places, 514 transitions, 2442 flow [2021-10-15 19:53:33,180 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2442, PETRI_PLACES=226, PETRI_TRANSITIONS=514} [2021-10-15 19:53:33,181 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -54 predicate places. [2021-10-15 19:53:33,181 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 514 transitions, 2442 flow [2021-10-15 19:53:33,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 19:53:33,182 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:53:33,182 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:53:33,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:53:33,183 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:53:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:53:33,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1595799053, now seen corresponding path program 1 times [2021-10-15 19:53:33,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:53:33,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890993783] [2021-10-15 19:53:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:33,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:53:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:53:33,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:53:33,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890993783] [2021-10-15 19:53:33,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890993783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:53:33,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:53:33,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:53:33,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576401765] [2021-10-15 19:53:33,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:53:33,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:53:33,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:53:33,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:53:33,318 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 482 [2021-10-15 19:53:33,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 514 transitions, 2442 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 19:53:33,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:53:33,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 482 [2021-10-15 19:53:33,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:53:34,628 INFO L129 PetriNetUnfolder]: 339/1513 cut-off events. [2021-10-15 19:53:34,628 INFO L130 PetriNetUnfolder]: For 649/649 co-relation queries the response was YES. [2021-10-15 19:53:34,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3780 conditions, 1513 events. 339/1513 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3624 event pairs, 0 based on Foata normal form. 58/1538 useless extension candidates. Maximal degree in co-relation 1140. Up to 1091 conditions per place. [2021-10-15 19:53:34,639 INFO L132 encePairwiseOnDemand]: 432/482 looper letters, 668 selfloop transitions, 25 changer transitions 0/716 dead transitions. [2021-10-15 19:53:34,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 716 transitions, 4330 flow [2021-10-15 19:53:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:53:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:53:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2021-10-15 19:53:34,644 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44398340248962653 [2021-10-15 19:53:34,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2021-10-15 19:53:34,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2021-10-15 19:53:34,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:53:34,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2021-10-15 19:53:34,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 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 19:53:34,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:34,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:34,655 INFO L186 Difference]: Start difference. First operand has 226 places, 514 transitions, 2442 flow. Second operand 3 states and 642 transitions. [2021-10-15 19:53:34,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 716 transitions, 4330 flow [2021-10-15 19:53:34,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 716 transitions, 3998 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:53:34,695 INFO L242 Difference]: Finished difference. Result has 227 places, 532 transitions, 2471 flow [2021-10-15 19:53:34,696 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2471, PETRI_PLACES=227, PETRI_TRANSITIONS=532} [2021-10-15 19:53:34,697 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -53 predicate places. [2021-10-15 19:53:34,697 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 532 transitions, 2471 flow [2021-10-15 19:53:34,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 19:53:34,698 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:53:34,698 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:53:34,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:53:34,699 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:53:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:53:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1018270588, now seen corresponding path program 1 times [2021-10-15 19:53:34,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:53:34,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708512086] [2021-10-15 19:53:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:34,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:53:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-15 19:53:34,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:53:34,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708512086] [2021-10-15 19:53:34,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708512086] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:53:34,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:53:34,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:53:34,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475727917] [2021-10-15 19:53:34,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:53:34,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:53:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:53:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:53:34,904 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 482 [2021-10-15 19:53:34,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 532 transitions, 2471 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 19:53:34,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:53:34,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 482 [2021-10-15 19:53:34,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:53:36,396 INFO L129 PetriNetUnfolder]: 420/1971 cut-off events. [2021-10-15 19:53:36,397 INFO L130 PetriNetUnfolder]: For 662/662 co-relation queries the response was YES. [2021-10-15 19:53:36,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4792 conditions, 1971 events. 420/1971 cut-off events. For 662/662 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6147 event pairs, 0 based on Foata normal form. 122/2083 useless extension candidates. Maximal degree in co-relation 1911. Up to 1044 conditions per place. [2021-10-15 19:53:36,411 INFO L132 encePairwiseOnDemand]: 384/482 looper letters, 663 selfloop transitions, 89 changer transitions 0/794 dead transitions. [2021-10-15 19:53:36,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 794 transitions, 4809 flow [2021-10-15 19:53:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:53:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:53:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2021-10-15 19:53:36,416 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5055325034578146 [2021-10-15 19:53:36,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2021-10-15 19:53:36,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2021-10-15 19:53:36,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:53:36,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2021-10-15 19:53:36,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:53:36,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:36,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:36,427 INFO L186 Difference]: Start difference. First operand has 227 places, 532 transitions, 2471 flow. Second operand 3 states and 731 transitions. [2021-10-15 19:53:36,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 794 transitions, 4809 flow [2021-10-15 19:53:36,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 794 transitions, 4784 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:53:36,459 INFO L242 Difference]: Finished difference. Result has 229 places, 563 transitions, 3127 flow [2021-10-15 19:53:36,461 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3127, PETRI_PLACES=229, PETRI_TRANSITIONS=563} [2021-10-15 19:53:36,461 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -51 predicate places. [2021-10-15 19:53:36,461 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 563 transitions, 3127 flow [2021-10-15 19:53:36,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 19:53:36,462 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:53:36,462 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:53:36,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:53:36,463 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:53:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:53:36,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1288394605, now seen corresponding path program 1 times [2021-10-15 19:53:36,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:53:36,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929681243] [2021-10-15 19:53:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:36,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:53:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:53:36,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:53:36,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929681243] [2021-10-15 19:53:36,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929681243] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:53:36,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:53:36,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:53:36,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326839512] [2021-10-15 19:53:36,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:53:36,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:53:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:53:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:53:36,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 482 [2021-10-15 19:53:36,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 563 transitions, 3127 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 19:53:36,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:53:36,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 482 [2021-10-15 19:53:36,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:53:38,409 INFO L129 PetriNetUnfolder]: 642/2973 cut-off events. [2021-10-15 19:53:38,410 INFO L130 PetriNetUnfolder]: For 2063/2063 co-relation queries the response was YES. [2021-10-15 19:53:38,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7669 conditions, 2973 events. 642/2973 cut-off events. For 2063/2063 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11873 event pairs, 0 based on Foata normal form. 87/3042 useless extension candidates. Maximal degree in co-relation 2965. Up to 2022 conditions per place. [2021-10-15 19:53:38,429 INFO L132 encePairwiseOnDemand]: 369/482 looper letters, 718 selfloop transitions, 180 changer transitions 0/939 dead transitions. [2021-10-15 19:53:38,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 939 transitions, 6825 flow [2021-10-15 19:53:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:53:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:53:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2021-10-15 19:53:38,433 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5172890733056709 [2021-10-15 19:53:38,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2021-10-15 19:53:38,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2021-10-15 19:53:38,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:53:38,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2021-10-15 19:53:38,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 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 19:53:38,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:38,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:38,443 INFO L186 Difference]: Start difference. First operand has 229 places, 563 transitions, 3127 flow. Second operand 3 states and 748 transitions. [2021-10-15 19:53:38,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 939 transitions, 6825 flow [2021-10-15 19:53:38,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 939 transitions, 6684 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:53:38,489 INFO L242 Difference]: Finished difference. Result has 231 places, 716 transitions, 5218 flow [2021-10-15 19:53:38,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5218, PETRI_PLACES=231, PETRI_TRANSITIONS=716} [2021-10-15 19:53:38,491 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -49 predicate places. [2021-10-15 19:53:38,491 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 716 transitions, 5218 flow [2021-10-15 19:53:38,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 19:53:38,492 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:53:38,492 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:53:38,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:53:38,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:53:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:53:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1139638576, now seen corresponding path program 1 times [2021-10-15 19:53:38,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:53:38,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620767331] [2021-10-15 19:53:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:38,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:53:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-15 19:53:38,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:53:38,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620767331] [2021-10-15 19:53:38,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620767331] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:53:38,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:53:38,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:53:38,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938315964] [2021-10-15 19:53:38,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:53:38,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:53:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:53:38,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:53:38,681 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 19:53:38,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 716 transitions, 5218 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 19:53:38,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:53:38,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 19:53:38,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:53:41,383 INFO L129 PetriNetUnfolder]: 1000/4448 cut-off events. [2021-10-15 19:53:41,383 INFO L130 PetriNetUnfolder]: For 4675/4675 co-relation queries the response was YES. [2021-10-15 19:53:41,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12546 conditions, 4448 events. 1000/4448 cut-off events. For 4675/4675 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 21579 event pairs, 0 based on Foata normal form. 61/4501 useless extension candidates. Maximal degree in co-relation 5819. Up to 2930 conditions per place. [2021-10-15 19:53:41,414 INFO L132 encePairwiseOnDemand]: 354/482 looper letters, 810 selfloop transitions, 340 changer transitions 0/1180 dead transitions. [2021-10-15 19:53:41,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1180 transitions, 10548 flow [2021-10-15 19:53:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:53:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:53:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 727 transitions. [2021-10-15 19:53:41,423 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5027662517289073 [2021-10-15 19:53:41,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 727 transitions. [2021-10-15 19:53:41,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 727 transitions. [2021-10-15 19:53:41,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:53:41,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 727 transitions. [2021-10-15 19:53:41,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 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 19:53:41,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:41,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:41,436 INFO L186 Difference]: Start difference. First operand has 231 places, 716 transitions, 5218 flow. Second operand 3 states and 727 transitions. [2021-10-15 19:53:41,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1180 transitions, 10548 flow [2021-10-15 19:53:41,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1180 transitions, 10266 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:53:41,507 INFO L242 Difference]: Finished difference. Result has 234 places, 984 transitions, 9430 flow [2021-10-15 19:53:41,508 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=9430, PETRI_PLACES=234, PETRI_TRANSITIONS=984} [2021-10-15 19:53:41,508 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -46 predicate places. [2021-10-15 19:53:41,509 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 984 transitions, 9430 flow [2021-10-15 19:53:41,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 19:53:41,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:53:41,510 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:53:41,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:53:41,511 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:53:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:53:41,512 INFO L82 PathProgramCache]: Analyzing trace with hash -972617143, now seen corresponding path program 1 times [2021-10-15 19:53:41,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:53:41,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147798579] [2021-10-15 19:53:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:41,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:53:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-10-15 19:53:41,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:53:41,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147798579] [2021-10-15 19:53:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147798579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:53:41,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454632762] [2021-10-15 19:53:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:41,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:53:41,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:53:41,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:53:41,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:53:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:53:41,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:53:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-10-15 19:53:42,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454632762] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:53:42,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:53:42,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-15 19:53:42,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284627637] [2021-10-15 19:53:42,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:53:42,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:53:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:53:42,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:53:42,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 482 [2021-10-15 19:53:42,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 984 transitions, 9430 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 19:53:42,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:53:42,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 482 [2021-10-15 19:53:42,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:53:47,325 INFO L129 PetriNetUnfolder]: 1525/7408 cut-off events. [2021-10-15 19:53:47,325 INFO L130 PetriNetUnfolder]: For 18696/18696 co-relation queries the response was YES. [2021-10-15 19:53:47,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21869 conditions, 7408 events. 1525/7408 cut-off events. For 18696/18696 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 40586 event pairs, 0 based on Foata normal form. 513/7921 useless extension candidates. Maximal degree in co-relation 9523. Up to 2804 conditions per place. [2021-10-15 19:53:47,369 INFO L132 encePairwiseOnDemand]: 344/482 looper letters, 1111 selfloop transitions, 644 changer transitions 0/1807 dead transitions. [2021-10-15 19:53:47,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1807 transitions, 18904 flow [2021-10-15 19:53:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:53:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:53:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1074 transitions. [2021-10-15 19:53:47,375 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5570539419087137 [2021-10-15 19:53:47,375 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1074 transitions. [2021-10-15 19:53:47,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1074 transitions. [2021-10-15 19:53:47,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:53:47,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1074 transitions. [2021-10-15 19:53:47,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 268.5) internal successors, (1074), 4 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 19:53:47,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 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 19:53:47,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 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 19:53:47,385 INFO L186 Difference]: Start difference. First operand has 234 places, 984 transitions, 9430 flow. Second operand 4 states and 1074 transitions. [2021-10-15 19:53:47,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1807 transitions, 18904 flow [2021-10-15 19:53:47,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1807 transitions, 17842 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:53:47,498 INFO L242 Difference]: Finished difference. Result has 238 places, 1306 transitions, 15640 flow [2021-10-15 19:53:47,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=8750, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=15640, PETRI_PLACES=238, PETRI_TRANSITIONS=1306} [2021-10-15 19:53:47,500 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -42 predicate places. [2021-10-15 19:53:47,500 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 1306 transitions, 15640 flow [2021-10-15 19:53:47,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 19:53:47,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:53:47,501 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:53:47,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:53:47,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:53:47,714 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:53:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:53:47,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1472509606, now seen corresponding path program 1 times [2021-10-15 19:53:47,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:53:47,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048373491] [2021-10-15 19:53:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:47,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:53:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 19:53:47,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:53:47,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048373491] [2021-10-15 19:53:47,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048373491] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:53:47,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:53:47,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:53:47,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071514728] [2021-10-15 19:53:47,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:53:47,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:53:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:53:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:53:47,850 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 19:53:47,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 1306 transitions, 15640 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 19:53:47,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:53:47,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 19:53:47,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:53:54,560 INFO L129 PetriNetUnfolder]: 1916/10406 cut-off events. [2021-10-15 19:53:54,560 INFO L130 PetriNetUnfolder]: For 33095/33095 co-relation queries the response was YES. [2021-10-15 19:53:54,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31785 conditions, 10406 events. 1916/10406 cut-off events. For 33095/33095 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 64347 event pairs, 0 based on Foata normal form. 439/10843 useless extension candidates. Maximal degree in co-relation 8069. Up to 6934 conditions per place. [2021-10-15 19:53:54,606 INFO L132 encePairwiseOnDemand]: 348/482 looper letters, 1301 selfloop transitions, 451 changer transitions 0/1774 dead transitions. [2021-10-15 19:53:54,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1774 transitions, 23362 flow [2021-10-15 19:53:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:53:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:53:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2021-10-15 19:53:54,612 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5013831258644537 [2021-10-15 19:53:54,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2021-10-15 19:53:54,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2021-10-15 19:53:54,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:53:54,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2021-10-15 19:53:54,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:53:54,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:54,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:53:54,619 INFO L186 Difference]: Start difference. First operand has 238 places, 1306 transitions, 15640 flow. Second operand 3 states and 725 transitions. [2021-10-15 19:53:54,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1774 transitions, 23362 flow [2021-10-15 19:53:54,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1774 transitions, 23362 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:53:54,757 INFO L242 Difference]: Finished difference. Result has 242 places, 1581 transitions, 22266 flow [2021-10-15 19:53:54,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=15426, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=841, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=22266, PETRI_PLACES=242, PETRI_TRANSITIONS=1581} [2021-10-15 19:53:54,759 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -38 predicate places. [2021-10-15 19:53:54,759 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 1581 transitions, 22266 flow [2021-10-15 19:53:54,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 19:53:54,760 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:53:54,760 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:53:54,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:53:54,761 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:53:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:53:54,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1995018028, now seen corresponding path program 1 times [2021-10-15 19:53:54,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:53:54,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300609279] [2021-10-15 19:53:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:53:54,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:53:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:53:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-15 19:53:54,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:53:54,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300609279] [2021-10-15 19:53:54,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300609279] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:53:54,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:53:54,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:53:54,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298497912] [2021-10-15 19:53:54,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:53:54,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:53:54,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:53:54,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:53:54,948 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 482 [2021-10-15 19:53:54,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 1581 transitions, 22266 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 19:53:54,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:53:54,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 482 [2021-10-15 19:53:54,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:54:02,150 INFO L129 PetriNetUnfolder]: 1275/9119 cut-off events. [2021-10-15 19:54:02,150 INFO L130 PetriNetUnfolder]: For 31647/31647 co-relation queries the response was YES. [2021-10-15 19:54:02,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26673 conditions, 9119 events. 1275/9119 cut-off events. For 31647/31647 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 55845 event pairs, 0 based on Foata normal form. 351/9468 useless extension candidates. Maximal degree in co-relation 8432. Up to 6504 conditions per place. [2021-10-15 19:54:02,168 INFO L132 encePairwiseOnDemand]: 385/482 looper letters, 0 selfloop transitions, 0 changer transitions 1340/1340 dead transitions. [2021-10-15 19:54:02,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1340 transitions, 18252 flow [2021-10-15 19:54:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:54:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:54:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 679 transitions. [2021-10-15 19:54:02,172 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46957123098201936 [2021-10-15 19:54:02,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 679 transitions. [2021-10-15 19:54:02,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 679 transitions. [2021-10-15 19:54:02,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:54:02,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 679 transitions. [2021-10-15 19:54:02,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 19:54:02,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:54:02,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 19:54:02,180 INFO L186 Difference]: Start difference. First operand has 242 places, 1581 transitions, 22266 flow. Second operand 3 states and 679 transitions. [2021-10-15 19:54:02,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1340 transitions, 18252 flow [2021-10-15 19:54:02,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1340 transitions, 17608 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:54:02,276 INFO L242 Difference]: Finished difference. Result has 240 places, 0 transitions, 0 flow [2021-10-15 19:54:02,277 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=14674, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=240, PETRI_TRANSITIONS=0} [2021-10-15 19:54:02,278 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -40 predicate places. [2021-10-15 19:54:02,278 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 0 transitions, 0 flow [2021-10-15 19:54:02,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 19:54:02,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:54:02,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:54:02,286 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:54:02,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:54:02 BoogieIcfgContainer [2021-10-15 19:54:02,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:54:02,291 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:54:02,291 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:54:02,292 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:54:02,292 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:53:29" (3/4) ... [2021-10-15 19:54:02,296 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:54:02,322 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:54:02,324 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:54:02,326 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:54:02,328 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:54:02,510 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:54:02,510 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:54:02,512 INFO L168 Benchmark]: Toolchain (without parser) took 36483.34 ms. Allocated memory was 107.0 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 68.6 MB in the beginning and 710.2 MB in the end (delta: -641.7 MB). Peak memory consumption was 615.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:54:02,513 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory was 78.1 MB in the beginning and 78.1 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:54:02,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1043.50 ms. Allocated memory is still 107.0 MB. Free memory was 68.4 MB in the beginning and 48.3 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:54:02,514 INFO L168 Benchmark]: Boogie Procedure Inliner took 190.70 ms. Allocated memory was 107.0 MB in the beginning and 148.9 MB in the end (delta: 41.9 MB). Free memory was 48.3 MB in the beginning and 112.8 MB in the end (delta: -64.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:54:02,514 INFO L168 Benchmark]: Boogie Preprocessor took 124.56 ms. Allocated memory is still 148.9 MB. Free memory was 112.8 MB in the beginning and 103.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:54:02,515 INFO L168 Benchmark]: RCFGBuilder took 1961.51 ms. Allocated memory is still 148.9 MB. Free memory was 103.3 MB in the beginning and 105.1 MB in the end (delta: -1.9 MB). Peak memory consumption was 58.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:54:02,515 INFO L168 Benchmark]: TraceAbstraction took 32937.90 ms. Allocated memory was 148.9 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 104.1 MB in the beginning and 735.4 MB in the end (delta: -631.2 MB). Peak memory consumption was 583.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:54:02,515 INFO L168 Benchmark]: Witness Printer took 218.72 ms. Allocated memory is still 1.4 GB. Free memory was 735.4 MB in the beginning and 710.2 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:54:02,523 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory was 78.1 MB in the beginning and 78.1 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1043.50 ms. Allocated memory is still 107.0 MB. Free memory was 68.4 MB in the beginning and 48.3 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 190.70 ms. Allocated memory was 107.0 MB in the beginning and 148.9 MB in the end (delta: 41.9 MB). Free memory was 48.3 MB in the beginning and 112.8 MB in the end (delta: -64.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 124.56 ms. Allocated memory is still 148.9 MB. Free memory was 112.8 MB in the beginning and 103.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1961.51 ms. Allocated memory is still 148.9 MB. Free memory was 103.3 MB in the beginning and 105.1 MB in the end (delta: -1.9 MB). Peak memory consumption was 58.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 32937.90 ms. Allocated memory was 148.9 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 104.1 MB in the beginning and 735.4 MB in the end (delta: -631.2 MB). Peak memory consumption was 583.9 MB. Max. memory is 16.1 GB. * Witness Printer took 218.72 ms. Allocated memory is still 1.4 GB. Free memory was 735.4 MB in the beginning and 710.2 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 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: 145]: 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, 283 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 15.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 32860.0ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 29472.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 202.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1205 SDtfs, 1571 SDslu, 0 SDs, 0 SdLazy, 5110 SolverSat, 1055 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6876.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22266occurred in iteration=8, InterpolantAutomatonStates: 28, 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: 147.5ms SsaConstructionTime, 524.7ms SatisfiabilityAnalysisTime, 1990.8ms InterpolantComputationTime, 1930 NumberOfCodeBlocks, 1930 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1920 ConstructedInterpolants, 0 QuantifiedInterpolants, 4454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 361 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 1174/1336 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 19:54:02,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fc94d87-103f-4458-a5b8-737cab643c4d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...