./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label38.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_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/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_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label38.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/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_782eec13-50ee-4382-89d6-60bda188ed5e/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 ea1d92b403839080b84472f5f751a439d61a1da2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:34:20,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:34:20,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:34:20,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:34:20,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:34:20,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:34:20,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:34:20,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:34:20,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:34:20,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:34:20,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:34:20,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:34:20,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:34:20,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:34:20,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:34:20,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:34:20,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:34:20,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:34:20,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:34:20,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:34:20,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:34:20,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:34:20,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:34:20,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:34:20,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:34:20,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:34:20,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:34:20,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:34:20,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:34:20,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:34:20,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:34:20,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:34:20,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:34:20,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:34:20,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:34:20,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:34:20,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:34:20,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:34:20,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:34:20,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:34:20,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:34:20,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:34:20,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:34:20,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:34:20,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:34:20,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:34:20,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:34:20,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:34:20,612 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:34:20,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:34:20,613 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:34:20,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:34:20,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:34:20,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:34:20,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:34:20,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:34:20,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:34:20,615 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:34:20,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:34:20,616 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:34:20,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:34:20,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:34:20,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:34:20,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:34:20,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:34:20,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:34:20,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:34:20,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:34:20,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:34:20,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:34:20,618 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:34:20,620 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:34:20,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:34:20,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:34:20,621 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_782eec13-50ee-4382-89d6-60bda188ed5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea1d92b403839080b84472f5f751a439d61a1da2 [2021-10-15 19:34:20,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:34:20,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:34:20,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:34:20,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:34:20,961 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:34:20,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem11_label38.c [2021-10-15 19:34:21,051 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/data/e00429fbd/2de76e867aef48a0a012a4ed82089500/FLAG7471a1e7e [2021-10-15 19:34:21,672 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:34:21,673 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/sv-benchmarks/c/eca-rers2012/Problem11_label38.c [2021-10-15 19:34:21,687 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/data/e00429fbd/2de76e867aef48a0a012a4ed82089500/FLAG7471a1e7e [2021-10-15 19:34:21,879 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/data/e00429fbd/2de76e867aef48a0a012a4ed82089500 [2021-10-15 19:34:21,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:34:21,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:34:21,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:34:21,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:34:21,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:34:21,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:34:21" (1/1) ... [2021-10-15 19:34:21,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a8ae39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:21, skipping insertion in model container [2021-10-15 19:34:21,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:34:21" (1/1) ... [2021-10-15 19:34:21,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:34:21,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:34:22,318 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_782eec13-50ee-4382-89d6-60bda188ed5e/sv-benchmarks/c/eca-rers2012/Problem11_label38.c[8652,8665] [2021-10-15 19:34:22,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:34:22,572 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:34:22,627 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_782eec13-50ee-4382-89d6-60bda188ed5e/sv-benchmarks/c/eca-rers2012/Problem11_label38.c[8652,8665] [2021-10-15 19:34:22,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:34:22,749 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:34:22,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22 WrapperNode [2021-10-15 19:34:22,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:34:22,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:34:22,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:34:22,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:34:22,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:22,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:22,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:34:22,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:34:22,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:34:22,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:34:22,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:22,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:22,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:22,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:23,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:23,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:23,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:23,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:34:23,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:34:23,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:34:23,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:34:23,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (1/1) ... [2021-10-15 19:34:23,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:34:23,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:23,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:34:23,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:34:23,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:34:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:34:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:34:23,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:34:25,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:34:25,198 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:34:25,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:34:25 BoogieIcfgContainer [2021-10-15 19:34:25,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:34:25,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:34:25,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:34:25,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:34:25,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:34:21" (1/3) ... [2021-10-15 19:34:25,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec04913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:34:25, skipping insertion in model container [2021-10-15 19:34:25,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:22" (2/3) ... [2021-10-15 19:34:25,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec04913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:34:25, skipping insertion in model container [2021-10-15 19:34:25,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:34:25" (3/3) ... [2021-10-15 19:34:25,213 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label38.c [2021-10-15 19:34:25,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:34:25,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:34:25,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:34:25,298 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 19:34:25,299 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:34:25,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 283 places, 482 transitions, 964 flow [2021-10-15 19:34:25,503 INFO L129 PetriNetUnfolder]: 200/482 cut-off events. [2021-10-15 19:34:25,506 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:34:25,509 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 336 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 19:34:25,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 283 places, 482 transitions, 964 flow [2021-10-15 19:34:25,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 477 transitions, 954 flow [2021-10-15 19:34:25,553 INFO L129 PetriNetUnfolder]: 56/172 cut-off events. [2021-10-15 19:34:25,554 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:34:25,554 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:25,555 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:25,555 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash -634083006, now seen corresponding path program 1 times [2021-10-15 19:34:25,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:25,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127232432] [2021-10-15 19:34:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:25,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:25,988 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 19:34:25,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:25,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127232432] [2021-10-15 19:34:25,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127232432] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:25,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:25,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:34:25,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503543442] [2021-10-15 19:34:26,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:26,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:26,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:26,025 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 482 [2021-10-15 19:34:26,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 477 transitions, 954 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 19:34:26,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:26,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 482 [2021-10-15 19:34:26,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:27,492 INFO L129 PetriNetUnfolder]: 187/660 cut-off events. [2021-10-15 19:34:27,493 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:34:27,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1281 conditions, 660 events. 187/660 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 791 event pairs, 0 based on Foata normal form. 62/485 useless extension candidates. Maximal degree in co-relation 2. Up to 384 conditions per place. [2021-10-15 19:34:27,502 INFO L132 encePairwiseOnDemand]: 264/482 looper letters, 515 selfloop transitions, 43 changer transitions 61/649 dead transitions. [2021-10-15 19:34:27,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 649 transitions, 2536 flow [2021-10-15 19:34:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2021-10-15 19:34:27,527 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6313969571230982 [2021-10-15 19:34:27,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2021-10-15 19:34:27,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2021-10-15 19:34:27,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:27,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2021-10-15 19:34:27,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 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 19:34:27,557 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 19:34:27,559 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 19:34:27,561 INFO L186 Difference]: Start difference. First operand has 280 places, 477 transitions, 954 flow. Second operand 3 states and 913 transitions. [2021-10-15 19:34:27,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 649 transitions, 2536 flow [2021-10-15 19:34:27,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 649 transitions, 2536 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:34:27,594 INFO L242 Difference]: Finished difference. Result has 283 places, 376 transitions, 1031 flow [2021-10-15 19:34:27,597 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=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1031, PETRI_PLACES=283, PETRI_TRANSITIONS=376} [2021-10-15 19:34:27,598 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, 3 predicate places. [2021-10-15 19:34:27,599 INFO L470 AbstractCegarLoop]: Abstraction has has 283 places, 376 transitions, 1031 flow [2021-10-15 19:34:27,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 19:34:27,600 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:27,601 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, 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] [2021-10-15 19:34:27,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:34:27,602 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:27,603 INFO L82 PathProgramCache]: Analyzing trace with hash -432857926, now seen corresponding path program 1 times [2021-10-15 19:34:27,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:27,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097444176] [2021-10-15 19:34:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:27,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:27,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:27,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097444176] [2021-10-15 19:34:27,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097444176] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:27,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:27,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:34:27,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958419403] [2021-10-15 19:34:27,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:27,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:27,828 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 19:34:27,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 376 transitions, 1031 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:27,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:27,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 19:34:27,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:29,167 INFO L129 PetriNetUnfolder]: 306/1105 cut-off events. [2021-10-15 19:34:29,168 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2021-10-15 19:34:29,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2391 conditions, 1105 events. 306/1105 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2258 event pairs, 0 based on Foata normal form. 41/1031 useless extension candidates. Maximal degree in co-relation 842. Up to 535 conditions per place. [2021-10-15 19:34:29,179 INFO L132 encePairwiseOnDemand]: 344/482 looper letters, 512 selfloop transitions, 132 changer transitions 0/666 dead transitions. [2021-10-15 19:34:29,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 666 transitions, 3069 flow [2021-10-15 19:34:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2021-10-15 19:34:29,184 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5055325034578146 [2021-10-15 19:34:29,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2021-10-15 19:34:29,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2021-10-15 19:34:29,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:29,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2021-10-15 19:34:29,192 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 19:34:29,196 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 19:34:29,198 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 19:34:29,199 INFO L186 Difference]: Start difference. First operand has 283 places, 376 transitions, 1031 flow. Second operand 3 states and 731 transitions. [2021-10-15 19:34:29,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 666 transitions, 3069 flow [2021-10-15 19:34:29,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 666 transitions, 3002 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:29,241 INFO L242 Difference]: Finished difference. Result has 226 places, 475 transitions, 2092 flow [2021-10-15 19:34:29,242 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2092, PETRI_PLACES=226, PETRI_TRANSITIONS=475} [2021-10-15 19:34:29,249 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -54 predicate places. [2021-10-15 19:34:29,250 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 475 transitions, 2092 flow [2021-10-15 19:34:29,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,250 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:29,251 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, 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] [2021-10-15 19:34:29,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:34:29,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -696650283, now seen corresponding path program 1 times [2021-10-15 19:34:29,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:29,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922916127] [2021-10-15 19:34:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:29,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:29,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:29,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922916127] [2021-10-15 19:34:29,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922916127] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:29,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:29,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:34:29,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042113321] [2021-10-15 19:34:29,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:29,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:29,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:29,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 482 [2021-10-15 19:34:29,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 475 transitions, 2092 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 19:34:29,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:29,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 482 [2021-10-15 19:34:29,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:30,953 INFO L129 PetriNetUnfolder]: 326/1495 cut-off events. [2021-10-15 19:34:30,954 INFO L130 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2021-10-15 19:34:30,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3635 conditions, 1495 events. 326/1495 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3949 event pairs, 0 based on Foata normal form. 60/1542 useless extension candidates. Maximal degree in co-relation 1705. Up to 1072 conditions per place. [2021-10-15 19:34:30,968 INFO L132 encePairwiseOnDemand]: 431/482 looper letters, 631 selfloop transitions, 23 changer transitions 0/677 dead transitions. [2021-10-15 19:34:30,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 677 transitions, 3876 flow [2021-10-15 19:34:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2021-10-15 19:34:30,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44398340248962653 [2021-10-15 19:34:30,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2021-10-15 19:34:30,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2021-10-15 19:34:30,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:30,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2021-10-15 19:34:30,978 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 19:34:30,984 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 19:34:30,986 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 19:34:30,986 INFO L186 Difference]: Start difference. First operand has 226 places, 475 transitions, 2092 flow. Second operand 3 states and 642 transitions. [2021-10-15 19:34:30,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 677 transitions, 3876 flow [2021-10-15 19:34:31,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 677 transitions, 3590 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:34:31,028 INFO L242 Difference]: Finished difference. Result has 227 places, 493 transitions, 2135 flow [2021-10-15 19:34:31,029 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2135, PETRI_PLACES=227, PETRI_TRANSITIONS=493} [2021-10-15 19:34:31,029 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -53 predicate places. [2021-10-15 19:34:31,030 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 493 transitions, 2135 flow [2021-10-15 19:34:31,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 19:34:31,030 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:31,031 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, 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] [2021-10-15 19:34:31,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:34:31,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:31,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1739360937, now seen corresponding path program 1 times [2021-10-15 19:34:31,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:31,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855529559] [2021-10-15 19:34:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:31,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:31,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:31,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855529559] [2021-10-15 19:34:31,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855529559] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:31,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:31,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:31,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595225076] [2021-10-15 19:34:31,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:31,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:31,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:31,176 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 482 [2021-10-15 19:34:31,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 493 transitions, 2135 flow. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:31,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:31,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 482 [2021-10-15 19:34:31,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:33,781 INFO L129 PetriNetUnfolder]: 730/3224 cut-off events. [2021-10-15 19:34:33,782 INFO L130 PetriNetUnfolder]: For 905/905 co-relation queries the response was YES. [2021-10-15 19:34:33,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7851 conditions, 3224 events. 730/3224 cut-off events. For 905/905 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13105 event pairs, 0 based on Foata normal form. 103/3312 useless extension candidates. Maximal degree in co-relation 3789. Up to 1462 conditions per place. [2021-10-15 19:34:33,808 INFO L132 encePairwiseOnDemand]: 346/482 looper letters, 889 selfloop transitions, 271 changer transitions 0/1198 dead transitions. [2021-10-15 19:34:33,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1198 transitions, 7260 flow [2021-10-15 19:34:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:34:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:34:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1077 transitions. [2021-10-15 19:34:33,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5586099585062241 [2021-10-15 19:34:33,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1077 transitions. [2021-10-15 19:34:33,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1077 transitions. [2021-10-15 19:34:33,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:33,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1077 transitions. [2021-10-15 19:34:33,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 269.25) internal successors, (1077), 4 states have internal predecessors, (1077), 0 states have call successors, (0), 0 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 19:34:33,826 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 19:34:33,829 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 19:34:33,829 INFO L186 Difference]: Start difference. First operand has 227 places, 493 transitions, 2135 flow. Second operand 4 states and 1077 transitions. [2021-10-15 19:34:33,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1198 transitions, 7260 flow [2021-10-15 19:34:33,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 1198 transitions, 7222 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:33,928 INFO L242 Difference]: Finished difference. Result has 232 places, 747 transitions, 5298 flow [2021-10-15 19:34:33,929 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5298, PETRI_PLACES=232, PETRI_TRANSITIONS=747} [2021-10-15 19:34:33,930 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -48 predicate places. [2021-10-15 19:34:33,930 INFO L470 AbstractCegarLoop]: Abstraction has has 232 places, 747 transitions, 5298 flow [2021-10-15 19:34:33,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:33,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:33,931 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:34:33,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:34:33,932 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1823294191, now seen corresponding path program 1 times [2021-10-15 19:34:33,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:33,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628003054] [2021-10-15 19:34:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:33,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-15 19:34:34,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:34,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628003054] [2021-10-15 19:34:34,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628003054] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:34,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:34,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:34,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74532976] [2021-10-15 19:34:34,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:34,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:34,136 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 19:34:34,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 747 transitions, 5298 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 19:34:34,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:34,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 19:34:34,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:37,206 INFO L129 PetriNetUnfolder]: 926/4536 cut-off events. [2021-10-15 19:34:37,206 INFO L130 PetriNetUnfolder]: For 4897/4897 co-relation queries the response was YES. [2021-10-15 19:34:37,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12172 conditions, 4536 events. 926/4536 cut-off events. For 4897/4897 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 22299 event pairs, 0 based on Foata normal form. 224/4750 useless extension candidates. Maximal degree in co-relation 5352. Up to 3195 conditions per place. [2021-10-15 19:34:37,236 INFO L132 encePairwiseOnDemand]: 353/482 looper letters, 857 selfloop transitions, 191 changer transitions 0/1070 dead transitions. [2021-10-15 19:34:37,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 1070 transitions, 9024 flow [2021-10-15 19:34:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2021-10-15 19:34:37,240 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.49861687413554634 [2021-10-15 19:34:37,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2021-10-15 19:34:37,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2021-10-15 19:34:37,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:37,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2021-10-15 19:34:37,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 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 19:34:37,248 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 19:34:37,250 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 19:34:37,250 INFO L186 Difference]: Start difference. First operand has 232 places, 747 transitions, 5298 flow. Second operand 3 states and 721 transitions. [2021-10-15 19:34:37,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 1070 transitions, 9024 flow [2021-10-15 19:34:37,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1070 transitions, 9012 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-10-15 19:34:37,331 INFO L242 Difference]: Finished difference. Result has 236 places, 880 transitions, 7818 flow [2021-10-15 19:34:37,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7818, PETRI_PLACES=236, PETRI_TRANSITIONS=880} [2021-10-15 19:34:37,333 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -44 predicate places. [2021-10-15 19:34:37,333 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 880 transitions, 7818 flow [2021-10-15 19:34:37,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 19:34:37,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:37,334 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:34:37,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:34:37,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:37,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1037701986, now seen corresponding path program 1 times [2021-10-15 19:34:37,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:37,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257215888] [2021-10-15 19:34:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:37,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-15 19:34:37,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:37,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257215888] [2021-10-15 19:34:37,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257215888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:37,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244616245] [2021-10-15 19:34:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:37,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:37,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:37,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:37,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:34:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:37,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:34:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-15 19:34:38,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244616245] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:38,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:38,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 19:34:38,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479691496] [2021-10-15 19:34:38,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:38,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:34:38,613 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 482 [2021-10-15 19:34:38,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 880 transitions, 7818 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 19:34:38,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:38,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 482 [2021-10-15 19:34:38,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:43,145 INFO L129 PetriNetUnfolder]: 1478/7665 cut-off events. [2021-10-15 19:34:43,145 INFO L130 PetriNetUnfolder]: For 13630/13630 co-relation queries the response was YES. [2021-10-15 19:34:43,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21696 conditions, 7665 events. 1478/7665 cut-off events. For 13630/13630 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 47744 event pairs, 0 based on Foata normal form. 254/7915 useless extension candidates. Maximal degree in co-relation 14795. Up to 3879 conditions per place. [2021-10-15 19:34:43,192 INFO L132 encePairwiseOnDemand]: 348/482 looper letters, 912 selfloop transitions, 505 changer transitions 0/1450 dead transitions. [2021-10-15 19:34:43,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1450 transitions, 15428 flow [2021-10-15 19:34:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2021-10-15 19:34:43,197 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.49861687413554634 [2021-10-15 19:34:43,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2021-10-15 19:34:43,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2021-10-15 19:34:43,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:43,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2021-10-15 19:34:43,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 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 19:34:43,205 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 19:34:43,207 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 19:34:43,207 INFO L186 Difference]: Start difference. First operand has 236 places, 880 transitions, 7818 flow. Second operand 3 states and 721 transitions. [2021-10-15 19:34:43,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1450 transitions, 15428 flow [2021-10-15 19:34:43,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 1450 transitions, 14652 flow, removed 98 selfloop flow, removed 2 redundant places. [2021-10-15 19:34:43,348 INFO L242 Difference]: Finished difference. Result has 238 places, 1263 transitions, 14416 flow [2021-10-15 19:34:43,350 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=7284, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=14416, PETRI_PLACES=238, PETRI_TRANSITIONS=1263} [2021-10-15 19:34:43,350 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -42 predicate places. [2021-10-15 19:34:43,350 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 1263 transitions, 14416 flow [2021-10-15 19:34:43,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 19:34:43,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:43,351 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, 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] [2021-10-15 19:34:43,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:43,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:43,573 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:43,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:43,573 INFO L82 PathProgramCache]: Analyzing trace with hash 855336243, now seen corresponding path program 1 times [2021-10-15 19:34:43,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:43,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958985766] [2021-10-15 19:34:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:43,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-15 19:34:43,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:43,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958985766] [2021-10-15 19:34:43,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958985766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:43,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876993184] [2021-10-15 19:34:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:43,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:43,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:43,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:43,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:34:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:44,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:34:44,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-15 19:34:45,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876993184] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:45,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:34:45,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-15 19:34:45,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608360864] [2021-10-15 19:34:45,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:45,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:45,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:45,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 482 [2021-10-15 19:34:45,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 1263 transitions, 14416 flow. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 19:34:45,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:45,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 482 [2021-10-15 19:34:45,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:53,027 INFO L129 PetriNetUnfolder]: 1968/10923 cut-off events. [2021-10-15 19:34:53,028 INFO L130 PetriNetUnfolder]: For 33254/33254 co-relation queries the response was YES. [2021-10-15 19:34:53,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32312 conditions, 10923 events. 1968/10923 cut-off events. For 33254/33254 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 76550 event pairs, 0 based on Foata normal form. 706/11627 useless extension candidates. Maximal degree in co-relation 12830. Up to 4212 conditions per place. [2021-10-15 19:34:53,091 INFO L132 encePairwiseOnDemand]: 353/482 looper letters, 1276 selfloop transitions, 707 changer transitions 0/2023 dead transitions. [2021-10-15 19:34:53,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 2023 transitions, 24192 flow [2021-10-15 19:34:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:34:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:34:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1066 transitions. [2021-10-15 19:34:53,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5529045643153527 [2021-10-15 19:34:53,097 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1066 transitions. [2021-10-15 19:34:53,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1066 transitions. [2021-10-15 19:34:53,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:53,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1066 transitions. [2021-10-15 19:34:53,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 266.5) internal successors, (1066), 4 states have internal predecessors, (1066), 0 states have call successors, (0), 0 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 19:34:53,106 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 19:34:53,107 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 19:34:53,107 INFO L186 Difference]: Start difference. First operand has 238 places, 1263 transitions, 14416 flow. Second operand 4 states and 1066 transitions. [2021-10-15 19:34:53,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 2023 transitions, 24192 flow [2021-10-15 19:34:53,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 2023 transitions, 22846 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:34:53,292 INFO L242 Difference]: Finished difference. Result has 242 places, 1562 transitions, 21158 flow [2021-10-15 19:34:53,293 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=13406, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=21158, PETRI_PLACES=242, PETRI_TRANSITIONS=1562} [2021-10-15 19:34:53,294 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -38 predicate places. [2021-10-15 19:34:53,294 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 1562 transitions, 21158 flow [2021-10-15 19:34:53,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 19:34:53,294 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:53,295 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, 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, 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] [2021-10-15 19:34:53,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-15 19:34:53,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:53,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:53,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1067749938, now seen corresponding path program 1 times [2021-10-15 19:34:53,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:53,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035341916] [2021-10-15 19:34:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:53,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-10-15 19:34:53,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:53,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035341916] [2021-10-15 19:34:53,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035341916] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:53,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:53,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:53,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834656435] [2021-10-15 19:34:53,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:53,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:53,682 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 482 [2021-10-15 19:34:53,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 1562 transitions, 21158 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 19:34:53,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:53,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 482 [2021-10-15 19:34:53,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:35:05,252 INFO L129 PetriNetUnfolder]: 2513/14411 cut-off events. [2021-10-15 19:35:05,252 INFO L130 PetriNetUnfolder]: For 51055/51055 co-relation queries the response was YES. [2021-10-15 19:35:05,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44881 conditions, 14411 events. 2513/14411 cut-off events. For 51055/51055 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 111807 event pairs, 0 based on Foata normal form. 337/14748 useless extension candidates. Maximal degree in co-relation 16839. Up to 9972 conditions per place. [2021-10-15 19:35:05,335 INFO L132 encePairwiseOnDemand]: 341/482 looper letters, 1427 selfloop transitions, 767 changer transitions 0/2235 dead transitions. [2021-10-15 19:35:05,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 2235 transitions, 33686 flow [2021-10-15 19:35:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:35:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:35:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2021-10-15 19:35:05,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5055325034578146 [2021-10-15 19:35:05,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2021-10-15 19:35:05,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2021-10-15 19:35:05,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:35:05,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2021-10-15 19:35:05,344 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 19:35:05,347 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 19:35:05,348 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 19:35:05,349 INFO L186 Difference]: Start difference. First operand has 242 places, 1562 transitions, 21158 flow. Second operand 3 states and 731 transitions. [2021-10-15 19:35:05,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 2235 transitions, 33686 flow [2021-10-15 19:35:05,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 2235 transitions, 33352 flow, removed 167 selfloop flow, removed 0 redundant places. [2021-10-15 19:35:05,662 INFO L242 Difference]: Finished difference. Result has 246 places, 2054 transitions, 33024 flow [2021-10-15 19:35:05,664 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=20806, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=33024, PETRI_PLACES=246, PETRI_TRANSITIONS=2054} [2021-10-15 19:35:05,665 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -34 predicate places. [2021-10-15 19:35:05,665 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 2054 transitions, 33024 flow [2021-10-15 19:35:05,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 19:35:05,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:35:05,666 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, 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, 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] [2021-10-15 19:35:05,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:35:05,666 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:35:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:35:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1084447020, now seen corresponding path program 1 times [2021-10-15 19:35:05,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:35:05,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111179421] [2021-10-15 19:35:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:35:05,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:35:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:35:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:35:05,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:35:05,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111179421] [2021-10-15 19:35:05,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111179421] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:35:05,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:35:05,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:35:05,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837534743] [2021-10-15 19:35:05,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:35:05,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:35:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:35:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:35:05,855 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 482 [2021-10-15 19:35:05,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 2054 transitions, 33024 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 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 19:35:05,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:35:05,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 482 [2021-10-15 19:35:05,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:35:27,254 INFO L129 PetriNetUnfolder]: 2591/17079 cut-off events. [2021-10-15 19:35:27,254 INFO L130 PetriNetUnfolder]: For 75267/75267 co-relation queries the response was YES. [2021-10-15 19:35:27,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52422 conditions, 17079 events. 2591/17079 cut-off events. For 75267/75267 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 138764 event pairs, 0 based on Foata normal form. 590/17669 useless extension candidates. Maximal degree in co-relation 22076. Up to 12724 conditions per place. [2021-10-15 19:35:27,294 INFO L132 encePairwiseOnDemand]: 350/482 looper letters, 0 selfloop transitions, 0 changer transitions 2251/2251 dead transitions. [2021-10-15 19:35:27,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 2251 transitions, 37522 flow [2021-10-15 19:35:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:35:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:35:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2021-10-15 19:35:27,299 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4979253112033195 [2021-10-15 19:35:27,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2021-10-15 19:35:27,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2021-10-15 19:35:27,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:35:27,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2021-10-15 19:35:27,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:35:27,306 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 19:35:27,307 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 19:35:27,308 INFO L186 Difference]: Start difference. First operand has 246 places, 2054 transitions, 33024 flow. Second operand 3 states and 720 transitions. [2021-10-15 19:35:27,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 2251 transitions, 37522 flow [2021-10-15 19:35:27,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 2251 transitions, 35960 flow, removed 39 selfloop flow, removed 2 redundant places. [2021-10-15 19:35:27,630 INFO L242 Difference]: Finished difference. Result has 244 places, 0 transitions, 0 flow [2021-10-15 19:35:27,632 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=27234, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=244, PETRI_TRANSITIONS=0} [2021-10-15 19:35:27,632 INFO L334 CegarLoopForPetriNet]: 280 programPoint places, -36 predicate places. [2021-10-15 19:35:27,632 INFO L470 AbstractCegarLoop]: Abstraction has has 244 places, 0 transitions, 0 flow [2021-10-15 19:35:27,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 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 19:35:27,635 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:35:27,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:35:27,642 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:35:27,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:35:27 BoogieIcfgContainer [2021-10-15 19:35:27,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:35:27,647 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:35:27,647 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:35:27,647 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:35:27,648 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:34:25" (3/4) ... [2021-10-15 19:35:27,651 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:35:27,689 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:35:27,691 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:35:27,693 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:35:27,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:35:27,896 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:35:27,897 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:35:27,898 INFO L168 Benchmark]: Toolchain (without parser) took 66012.96 ms. Allocated memory was 96.5 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 58.3 MB in the beginning and 582.0 MB in the end (delta: -523.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 16.1 GB. [2021-10-15 19:35:27,899 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory was 67.9 MB in the beginning and 67.9 MB in the end (delta: 31.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:35:27,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 862.81 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 58.0 MB in the beginning and 63.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:27,905 INFO L168 Benchmark]: Boogie Procedure Inliner took 142.47 ms. Allocated memory is still 121.6 MB. Free memory was 63.5 MB in the beginning and 46.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:27,906 INFO L168 Benchmark]: Boogie Preprocessor took 249.63 ms. Allocated memory is still 121.6 MB. Free memory was 46.7 MB in the beginning and 83.0 MB in the end (delta: -36.3 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:27,906 INFO L168 Benchmark]: RCFGBuilder took 2055.48 ms. Allocated memory is still 121.6 MB. Free memory was 82.5 MB in the beginning and 54.0 MB in the end (delta: 28.5 MB). Peak memory consumption was 50.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:27,907 INFO L168 Benchmark]: TraceAbstraction took 62442.82 ms. Allocated memory was 121.6 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 54.0 MB in the beginning and 606.4 MB in the end (delta: -552.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-10-15 19:35:27,907 INFO L168 Benchmark]: Witness Printer took 249.72 ms. Allocated memory is still 1.9 GB. Free memory was 606.4 MB in the beginning and 582.0 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:35:27,909 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory was 67.9 MB in the beginning and 67.9 MB in the end (delta: 31.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 862.81 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 58.0 MB in the beginning and 63.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 142.47 ms. Allocated memory is still 121.6 MB. Free memory was 63.5 MB in the beginning and 46.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 249.63 ms. Allocated memory is still 121.6 MB. Free memory was 46.7 MB in the beginning and 83.0 MB in the end (delta: -36.3 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2055.48 ms. Allocated memory is still 121.6 MB. Free memory was 82.5 MB in the beginning and 54.0 MB in the end (delta: 28.5 MB). Peak memory consumption was 50.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 62442.82 ms. Allocated memory was 121.6 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 54.0 MB in the beginning and 606.4 MB in the end (delta: -552.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. * Witness Printer took 249.72 ms. Allocated memory is still 1.9 GB. Free memory was 606.4 MB in the beginning and 582.0 MB in the end (delta: 24.4 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: 196]: 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: 22.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 62359.1ms, OverallIterations: 9, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 56961.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 231.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1468 SDtfs, 1540 SDslu, 0 SDs, 0 SdLazy, 5715 SolverSat, 1048 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7755.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 551 GetRequests, 535 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 81.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33024occurred in iteration=8, InterpolantAutomatonStates: 29, 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: 189.8ms SsaConstructionTime, 611.1ms SatisfiabilityAnalysisTime, 3479.2ms InterpolantComputationTime, 2421 NumberOfCodeBlocks, 2421 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 2410 ConstructedInterpolants, 0 QuantifiedInterpolants, 8077 SizeOfPredicates, 0 NumberOfNonLiveVariables, 779 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 1359/1613 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 19:35:27,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782eec13-50ee-4382-89d6-60bda188ed5e/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...