./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/nested-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/nested-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer --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 7f63971ff7e1e47adf4fc8a9c16196a6401c3822 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 18:14:55,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:14:55,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:14:55,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:14:55,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:14:55,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:14:55,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:14:55,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:14:55,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:14:55,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:14:55,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:14:55,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:14:55,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:14:55,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:14:55,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:14:55,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:14:55,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:14:55,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:14:55,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:14:55,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:14:55,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:14:55,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:14:55,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:14:55,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:14:55,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:14:55,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:14:55,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:14:55,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:14:55,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:14:55,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:14:55,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:14:55,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:14:55,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:14:55,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:14:55,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:14:55,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:14:55,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:14:55,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:14:55,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:14:55,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:14:55,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:14:55,627 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:14:55,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:14:55,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:14:55,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:14:55,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:14:55,674 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:14:55,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:14:55,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:14:55,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:14:55,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:14:55,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:14:55,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:14:55,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:14:55,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:14:55,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:14:55,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:14:55,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:14:55,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:14:55,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:14:55,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:14:55,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:14:55,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:14:55,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:14:55,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:14:55,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:14:55,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:14:55,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:14:55,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:14:55,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:14:55,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:14:55,680 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-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f63971ff7e1e47adf4fc8a9c16196a6401c3822 [2020-11-29 18:14:55,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:14:55,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:14:55,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:14:55,951 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:14:55,953 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:14:55,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/../../sv-benchmarks/c/loop-new/nested-1.i [2020-11-29 18:14:56,043 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/data/7bc3f9bb7/694659366e9741f78055052e2c66cd93/FLAGc5e1872e8 [2020-11-29 18:14:56,486 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:14:56,487 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/sv-benchmarks/c/loop-new/nested-1.i [2020-11-29 18:14:56,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/data/7bc3f9bb7/694659366e9741f78055052e2c66cd93/FLAGc5e1872e8 [2020-11-29 18:14:56,851 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/data/7bc3f9bb7/694659366e9741f78055052e2c66cd93 [2020-11-29 18:14:56,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:14:56,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:14:56,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:14:56,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:14:56,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:14:56,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:14:56" (1/1) ... [2020-11-29 18:14:56,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1364ca3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:56, skipping insertion in model container [2020-11-29 18:14:56,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:14:56" (1/1) ... [2020-11-29 18:14:56,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:14:56,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:14:57,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:14:57,163 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:14:57,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:14:57,203 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:14:57,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57 WrapperNode [2020-11-29 18:14:57,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:14:57,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:14:57,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:14:57,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:14:57,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... [2020-11-29 18:14:57,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... [2020-11-29 18:14:57,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:14:57,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:14:57,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:14:57,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:14:57,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... [2020-11-29 18:14:57,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... [2020-11-29 18:14:57,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... [2020-11-29 18:14:57,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... [2020-11-29 18:14:57,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... [2020-11-29 18:14:57,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... [2020-11-29 18:14:57,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... [2020-11-29 18:14:57,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:14:57,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:14:57,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:14:57,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:14:57,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:14:57,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:14:57,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:14:57,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:14:57,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:14:57,555 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:14:57,555 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 18:14:57,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:14:57 BoogieIcfgContainer [2020-11-29 18:14:57,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:14:57,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:14:57,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:14:57,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:14:57,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:14:56" (1/3) ... [2020-11-29 18:14:57,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2303f342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:14:57, skipping insertion in model container [2020-11-29 18:14:57,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:14:57" (2/3) ... [2020-11-29 18:14:57,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2303f342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:14:57, skipping insertion in model container [2020-11-29 18:14:57,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:14:57" (3/3) ... [2020-11-29 18:14:57,582 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-1.i [2020-11-29 18:14:57,592 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:14:57,597 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:14:57,607 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:14:57,644 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:14:57,644 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:14:57,644 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:14:57,644 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:14:57,644 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:14:57,644 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:14:57,645 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:14:57,645 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:14:57,681 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-29 18:14:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 18:14:57,686 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:57,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:57,687 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash 809669855, now seen corresponding path program 1 times [2020-11-29 18:14:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:57,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037133388] [2020-11-29 18:14:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:14:57,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037133388] [2020-11-29 18:14:57,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:14:57,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:14:57,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125255054] [2020-11-29 18:14:57,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:14:57,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:57,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:14:57,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:14:57,957 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-11-29 18:14:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:58,021 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2020-11-29 18:14:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:14:58,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 18:14:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:58,030 INFO L225 Difference]: With dead ends: 40 [2020-11-29 18:14:58,030 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 18:14:58,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:14:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 18:14:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2020-11-29 18:14:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 18:14:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-29 18:14:58,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-29 18:14:58,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:58,064 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-29 18:14:58,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:14:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-29 18:14:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 18:14:58,065 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:58,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:58,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:14:58,065 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1063231125, now seen corresponding path program 1 times [2020-11-29 18:14:58,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:58,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920258657] [2020-11-29 18:14:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:14:58,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920258657] [2020-11-29 18:14:58,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:14:58,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:14:58,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874278408] [2020-11-29 18:14:58,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:14:58,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:58,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:14:58,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:14:58,133 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-11-29 18:14:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:58,157 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-11-29 18:14:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:14:58,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 18:14:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:58,158 INFO L225 Difference]: With dead ends: 27 [2020-11-29 18:14:58,158 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 18:14:58,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:14:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 18:14:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-11-29 18:14:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 18:14:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-29 18:14:58,163 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-11-29 18:14:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:58,164 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-29 18:14:58,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:14:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-29 18:14:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 18:14:58,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:58,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:58,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:14:58,165 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:58,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -176805907, now seen corresponding path program 1 times [2020-11-29 18:14:58,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:58,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840341554] [2020-11-29 18:14:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:14:58,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840341554] [2020-11-29 18:14:58,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681793568] [2020-11-29 18:14:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:58,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:14:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:14:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:14:58,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:14:58,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-29 18:14:58,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228623536] [2020-11-29 18:14:58,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:14:58,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:58,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:14:58,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:14:58,444 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2020-11-29 18:14:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:58,514 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-11-29 18:14:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:14:58,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-29 18:14:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:58,517 INFO L225 Difference]: With dead ends: 30 [2020-11-29 18:14:58,517 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 18:14:58,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:14:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 18:14:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-11-29 18:14:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 18:14:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-29 18:14:58,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-11-29 18:14:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:58,522 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-29 18:14:58,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:14:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-29 18:14:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 18:14:58,523 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:58,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:58,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 18:14:58,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:58,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1274303983, now seen corresponding path program 2 times [2020-11-29 18:14:58,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:58,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187868577] [2020-11-29 18:14:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:14:58,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187868577] [2020-11-29 18:14:58,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79865305] [2020-11-29 18:14:58,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:58,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:14:58,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:14:58,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:14:58,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:14:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:14:58,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:14:58,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-11-29 18:14:58,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596024882] [2020-11-29 18:14:58,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 18:14:58,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:58,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 18:14:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:14:58,954 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-11-29 18:14:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:59,004 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-11-29 18:14:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:14:59,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-29 18:14:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:59,005 INFO L225 Difference]: With dead ends: 34 [2020-11-29 18:14:59,006 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 18:14:59,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:14:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 18:14:59,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-11-29 18:14:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 18:14:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-29 18:14:59,011 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-11-29 18:14:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:59,011 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-29 18:14:59,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 18:14:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-29 18:14:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 18:14:59,012 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:59,012 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:59,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:59,229 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:59,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:59,230 INFO L82 PathProgramCache]: Analyzing trace with hash -73462927, now seen corresponding path program 3 times [2020-11-29 18:14:59,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:59,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992499770] [2020-11-29 18:14:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:14:59,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992499770] [2020-11-29 18:14:59,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675246139] [2020-11-29 18:14:59,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:59,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 18:14:59,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:14:59,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:14:59,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:14:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 18:14:59,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:14:59,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-11-29 18:14:59,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413739740] [2020-11-29 18:14:59,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:14:59,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:14:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:14:59,451 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-11-29 18:14:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:59,886 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-11-29 18:14:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 18:14:59,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-11-29 18:14:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:59,888 INFO L225 Difference]: With dead ends: 61 [2020-11-29 18:14:59,888 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 18:14:59,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2020-11-29 18:14:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 18:14:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2020-11-29 18:14:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 18:14:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-29 18:14:59,899 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2020-11-29 18:14:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:59,899 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-29 18:14:59,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:14:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-29 18:14:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 18:14:59,901 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:59,901 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:00,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:00,125 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1964748705, now seen corresponding path program 4 times [2020-11-29 18:15:00,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:00,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139317265] [2020-11-29 18:15:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 18:15:00,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139317265] [2020-11-29 18:15:00,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577932412] [2020-11-29 18:15:00,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:00,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:15:00,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 18:15:00,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:00,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-29 18:15:00,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661971920] [2020-11-29 18:15:00,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:15:00,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:00,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:15:00,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:15:00,396 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 13 states. [2020-11-29 18:15:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:00,454 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-29 18:15:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:15:00,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-11-29 18:15:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:00,456 INFO L225 Difference]: With dead ends: 58 [2020-11-29 18:15:00,456 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 18:15:00,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:15:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 18:15:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-11-29 18:15:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-29 18:15:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-29 18:15:00,464 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-11-29 18:15:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:00,464 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-29 18:15:00,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:15:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-29 18:15:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 18:15:00,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:00,465 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:00,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:00,666 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:00,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:00,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1895503713, now seen corresponding path program 5 times [2020-11-29 18:15:00,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:00,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919666643] [2020-11-29 18:15:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-29 18:15:00,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919666643] [2020-11-29 18:15:00,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117779311] [2020-11-29 18:15:00,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:00,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-29 18:15:00,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:00,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:15:00,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-29 18:15:01,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:01,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-11-29 18:15:01,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063255509] [2020-11-29 18:15:01,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 18:15:01,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:01,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:15:01,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:15:01,013 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 15 states. [2020-11-29 18:15:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:01,078 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-11-29 18:15:01,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:15:01,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-11-29 18:15:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:01,082 INFO L225 Difference]: With dead ends: 64 [2020-11-29 18:15:01,082 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 18:15:01,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:15:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 18:15:01,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-11-29 18:15:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 18:15:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-11-29 18:15:01,088 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-11-29 18:15:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:01,088 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-11-29 18:15:01,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 18:15:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-11-29 18:15:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 18:15:01,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:01,090 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:01,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 18:15:01,300 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:01,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:01,300 INFO L82 PathProgramCache]: Analyzing trace with hash 944169439, now seen corresponding path program 6 times [2020-11-29 18:15:01,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:01,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781864048] [2020-11-29 18:15:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-29 18:15:01,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781864048] [2020-11-29 18:15:01,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938632076] [2020-11-29 18:15:01,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:01,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-29 18:15:01,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:01,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:15:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-11-29 18:15:01,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:01,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-11-29 18:15:01,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366009052] [2020-11-29 18:15:01,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 18:15:01,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:01,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 18:15:01,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:15:01,609 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 14 states. [2020-11-29 18:15:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:02,567 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-11-29 18:15:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-29 18:15:02,567 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-11-29 18:15:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:02,568 INFO L225 Difference]: With dead ends: 105 [2020-11-29 18:15:02,569 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 18:15:02,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2020-11-29 18:15:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 18:15:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2020-11-29 18:15:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 18:15:02,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-11-29 18:15:02,581 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 40 [2020-11-29 18:15:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:02,582 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-11-29 18:15:02,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 18:15:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-11-29 18:15:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-29 18:15:02,583 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:02,584 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:02,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:02,800 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:02,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1418865977, now seen corresponding path program 7 times [2020-11-29 18:15:02,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:02,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43586873] [2020-11-29 18:15:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 229 proven. 49 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-11-29 18:15:03,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43586873] [2020-11-29 18:15:03,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950863692] [2020-11-29 18:15:03,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:15:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 229 proven. 49 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-11-29 18:15:03,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:03,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-29 18:15:03,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598622694] [2020-11-29 18:15:03,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 18:15:03,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:03,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 18:15:03,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:15:03,230 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 19 states. [2020-11-29 18:15:03,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:03,300 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2020-11-29 18:15:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:15:03,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-11-29 18:15:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:03,302 INFO L225 Difference]: With dead ends: 113 [2020-11-29 18:15:03,302 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 18:15:03,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:15:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 18:15:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-11-29 18:15:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 18:15:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-11-29 18:15:03,312 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2020-11-29 18:15:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:03,313 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-11-29 18:15:03,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 18:15:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-11-29 18:15:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-29 18:15:03,314 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:03,314 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:03,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:03,528 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2126285573, now seen corresponding path program 8 times [2020-11-29 18:15:03,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:03,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152307561] [2020-11-29 18:15:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 293 proven. 64 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2020-11-29 18:15:03,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152307561] [2020-11-29 18:15:03,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950708432] [2020-11-29 18:15:03,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:03,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:15:03,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:15:03,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 293 proven. 64 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2020-11-29 18:15:04,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:04,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-29 18:15:04,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522197616] [2020-11-29 18:15:04,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 18:15:04,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:04,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 18:15:04,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-11-29 18:15:04,044 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 21 states. [2020-11-29 18:15:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:04,111 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-11-29 18:15:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:15:04,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-11-29 18:15:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:04,114 INFO L225 Difference]: With dead ends: 123 [2020-11-29 18:15:04,114 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 18:15:04,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-11-29 18:15:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 18:15:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-11-29 18:15:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 18:15:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-11-29 18:15:04,125 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 67 [2020-11-29 18:15:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:04,125 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-11-29 18:15:04,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 18:15:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-11-29 18:15:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-29 18:15:04,126 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:04,127 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:04,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 18:15:04,340 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1187062589, now seen corresponding path program 9 times [2020-11-29 18:15:04,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:04,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396662615] [2020-11-29 18:15:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 365 proven. 81 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2020-11-29 18:15:04,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396662615] [2020-11-29 18:15:04,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950145290] [2020-11-29 18:15:04,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:04,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-11-29 18:15:04,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:04,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:15:04,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 367 proven. 81 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-11-29 18:15:04,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:04,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-29 18:15:04,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116092555] [2020-11-29 18:15:04,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 18:15:04,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:04,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 18:15:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-11-29 18:15:04,823 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 23 states. [2020-11-29 18:15:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:04,892 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2020-11-29 18:15:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 18:15:04,893 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2020-11-29 18:15:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:04,893 INFO L225 Difference]: With dead ends: 133 [2020-11-29 18:15:04,893 INFO L226 Difference]: Without dead ends: 83 [2020-11-29 18:15:04,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=329, Unknown=0, NotChecked=0, Total=552 [2020-11-29 18:15:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-29 18:15:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-11-29 18:15:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 18:15:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-11-29 18:15:04,904 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2020-11-29 18:15:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:04,904 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-11-29 18:15:04,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 18:15:04,905 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-11-29 18:15:04,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-29 18:15:04,906 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:04,906 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:05,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:05,116 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash -879962113, now seen corresponding path program 10 times [2020-11-29 18:15:05,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:05,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470458477] [2020-11-29 18:15:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-11-29 18:15:05,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470458477] [2020-11-29 18:15:05,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443431889] [2020-11-29 18:15:05,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:05,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:15:05,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:05,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:15:05,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-11-29 18:15:05,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:05,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-11-29 18:15:05,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956054313] [2020-11-29 18:15:05,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 18:15:05,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:05,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:15:05,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:15:05,514 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 11 states. [2020-11-29 18:15:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:05,566 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2020-11-29 18:15:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:15:05,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-11-29 18:15:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:05,568 INFO L225 Difference]: With dead ends: 131 [2020-11-29 18:15:05,568 INFO L226 Difference]: Without dead ends: 125 [2020-11-29 18:15:05,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:15:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-29 18:15:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2020-11-29 18:15:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-29 18:15:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-11-29 18:15:05,589 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 79 [2020-11-29 18:15:05,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:05,591 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-11-29 18:15:05,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 18:15:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-11-29 18:15:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-29 18:15:05,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:05,601 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:05,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:05,824 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash -469791521, now seen corresponding path program 11 times [2020-11-29 18:15:05,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:05,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107433045] [2020-11-29 18:15:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 18:15:05,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107433045] [2020-11-29 18:15:05,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996545724] [2020-11-29 18:15:05,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:06,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-11-29 18:15:06,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:06,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 18:15:06,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:06,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-29 18:15:06,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866944107] [2020-11-29 18:15:06,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:15:06,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:15:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:15:06,232 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 13 states. [2020-11-29 18:15:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:06,287 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-11-29 18:15:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:15:06,288 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 102 [2020-11-29 18:15:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:06,290 INFO L225 Difference]: With dead ends: 154 [2020-11-29 18:15:06,290 INFO L226 Difference]: Without dead ends: 148 [2020-11-29 18:15:06,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:15:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-29 18:15:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 126. [2020-11-29 18:15:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-29 18:15:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-11-29 18:15:06,304 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 102 [2020-11-29 18:15:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:06,305 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-11-29 18:15:06,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:15:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-11-29 18:15:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-29 18:15:06,311 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:06,311 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:06,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 18:15:06,512 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash 85941247, now seen corresponding path program 12 times [2020-11-29 18:15:06,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:06,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286607328] [2020-11-29 18:15:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-11-29 18:15:06,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286607328] [2020-11-29 18:15:06,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474026668] [2020-11-29 18:15:06,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:06,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2020-11-29 18:15:06,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:06,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:15:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-11-29 18:15:06,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:06,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-11-29 18:15:06,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24844153] [2020-11-29 18:15:06,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 18:15:06,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:06,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:15:06,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:15:06,985 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 15 states. [2020-11-29 18:15:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:07,064 INFO L93 Difference]: Finished difference Result 177 states and 184 transitions. [2020-11-29 18:15:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:15:07,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 125 [2020-11-29 18:15:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:07,067 INFO L225 Difference]: With dead ends: 177 [2020-11-29 18:15:07,067 INFO L226 Difference]: Without dead ends: 171 [2020-11-29 18:15:07,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:15:07,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-29 18:15:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 149. [2020-11-29 18:15:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-29 18:15:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2020-11-29 18:15:07,088 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 125 [2020-11-29 18:15:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:07,089 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2020-11-29 18:15:07,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 18:15:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2020-11-29 18:15:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-11-29 18:15:07,091 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:07,091 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:07,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 18:15:07,304 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash -740783905, now seen corresponding path program 13 times [2020-11-29 18:15:07,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:07,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824940404] [2020-11-29 18:15:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-11-29 18:15:07,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824940404] [2020-11-29 18:15:07,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803433190] [2020-11-29 18:15:07,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:07,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 18:15:07,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-11-29 18:15:07,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:07,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-29 18:15:07,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778108589] [2020-11-29 18:15:07,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 18:15:07,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:07,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 18:15:07,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-11-29 18:15:07,816 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 17 states. [2020-11-29 18:15:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:07,890 INFO L93 Difference]: Finished difference Result 200 states and 208 transitions. [2020-11-29 18:15:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:15:07,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 148 [2020-11-29 18:15:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:07,892 INFO L225 Difference]: With dead ends: 200 [2020-11-29 18:15:07,892 INFO L226 Difference]: Without dead ends: 194 [2020-11-29 18:15:07,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-11-29 18:15:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-29 18:15:07,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 172. [2020-11-29 18:15:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-11-29 18:15:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2020-11-29 18:15:07,908 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 148 [2020-11-29 18:15:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:07,909 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2020-11-29 18:15:07,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 18:15:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2020-11-29 18:15:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-11-29 18:15:07,911 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:07,911 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:08,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 18:15:08,136 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:08,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1256906751, now seen corresponding path program 14 times [2020-11-29 18:15:08,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:08,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039662691] [2020-11-29 18:15:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-11-29 18:15:08,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039662691] [2020-11-29 18:15:08,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338304293] [2020-11-29 18:15:08,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:08,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:15:08,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:15:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-11-29 18:15:08,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:08,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-29 18:15:08,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567568061] [2020-11-29 18:15:08,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 18:15:08,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:08,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 18:15:08,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:15:08,755 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand 19 states. [2020-11-29 18:15:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:08,825 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2020-11-29 18:15:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:15:08,825 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 171 [2020-11-29 18:15:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:08,827 INFO L225 Difference]: With dead ends: 223 [2020-11-29 18:15:08,827 INFO L226 Difference]: Without dead ends: 217 [2020-11-29 18:15:08,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:15:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-11-29 18:15:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2020-11-29 18:15:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-11-29 18:15:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 203 transitions. [2020-11-29 18:15:08,846 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 203 transitions. Word has length 171 [2020-11-29 18:15:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:08,846 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 203 transitions. [2020-11-29 18:15:08,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 18:15:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 203 transitions. [2020-11-29 18:15:08,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-29 18:15:08,848 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:08,849 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:09,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:09,064 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:09,064 INFO L82 PathProgramCache]: Analyzing trace with hash 123241695, now seen corresponding path program 15 times [2020-11-29 18:15:09,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:09,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325554352] [2020-11-29 18:15:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-11-29 18:15:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325554352] [2020-11-29 18:15:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745302188] [2020-11-29 18:15:09,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:09,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2020-11-29 18:15:09,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:15:09,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-11-29 18:15:09,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:09,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-29 18:15:09,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577906687] [2020-11-29 18:15:09,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 18:15:09,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:09,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 18:15:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-11-29 18:15:09,830 INFO L87 Difference]: Start difference. First operand 195 states and 203 transitions. Second operand 21 states. [2020-11-29 18:15:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:09,920 INFO L93 Difference]: Finished difference Result 246 states and 256 transitions. [2020-11-29 18:15:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:15:09,921 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 194 [2020-11-29 18:15:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:09,923 INFO L225 Difference]: With dead ends: 246 [2020-11-29 18:15:09,923 INFO L226 Difference]: Without dead ends: 240 [2020-11-29 18:15:09,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-11-29 18:15:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-11-29 18:15:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 218. [2020-11-29 18:15:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-11-29 18:15:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 227 transitions. [2020-11-29 18:15:09,944 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 227 transitions. Word has length 194 [2020-11-29 18:15:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:09,945 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 227 transitions. [2020-11-29 18:15:09,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 18:15:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 227 transitions. [2020-11-29 18:15:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-29 18:15:09,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:09,948 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:10,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 18:15:10,176 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 556753919, now seen corresponding path program 16 times [2020-11-29 18:15:10,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:10,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842578588] [2020-11-29 18:15:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-11-29 18:15:10,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842578588] [2020-11-29 18:15:10,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360162149] [2020-11-29 18:15:10,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:10,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:15:10,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:10,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:15:10,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-11-29 18:15:10,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:10,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-29 18:15:10,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925409778] [2020-11-29 18:15:10,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 18:15:10,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:10,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 18:15:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-11-29 18:15:10,988 INFO L87 Difference]: Start difference. First operand 218 states and 227 transitions. Second operand 23 states. [2020-11-29 18:15:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:11,115 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2020-11-29 18:15:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 18:15:11,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 217 [2020-11-29 18:15:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:11,118 INFO L225 Difference]: With dead ends: 269 [2020-11-29 18:15:11,118 INFO L226 Difference]: Without dead ends: 263 [2020-11-29 18:15:11,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=329, Unknown=0, NotChecked=0, Total=552 [2020-11-29 18:15:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-11-29 18:15:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 241. [2020-11-29 18:15:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-11-29 18:15:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 251 transitions. [2020-11-29 18:15:11,141 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 251 transitions. Word has length 217 [2020-11-29 18:15:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:11,142 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 251 transitions. [2020-11-29 18:15:11,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 18:15:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 251 transitions. [2020-11-29 18:15:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-11-29 18:15:11,145 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:15:11,146 INFO L422 BasicCegarLoop]: trace histogram [100, 100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:11,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 18:15:11,372 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:15:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash 843022559, now seen corresponding path program 17 times [2020-11-29 18:15:11,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:11,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308967552] [2020-11-29 18:15:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 10917 proven. 119 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 18:15:17,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308967552] [2020-11-29 18:15:17,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788394446] [2020-11-29 18:15:17,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:17,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 81 check-sat command(s) [2020-11-29 18:15:17,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 104 conjunts are in the unsatisfiable core [2020-11-29 18:15:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:18,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:18,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 11036 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 18:15:18,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:15:18,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [104] total 106 [2020-11-29 18:15:18,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019942651] [2020-11-29 18:15:18,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-11-29 18:15:18,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:18,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-11-29 18:15:18,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2020-11-29 18:15:18,172 INFO L87 Difference]: Start difference. First operand 241 states and 251 transitions. Second operand 104 states. [2020-11-29 18:15:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:20,052 INFO L93 Difference]: Finished difference Result 9781 states and 10241 transitions. [2020-11-29 18:15:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-11-29 18:15:20,052 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 240 [2020-11-29 18:15:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:15:20,053 INFO L225 Difference]: With dead ends: 9781 [2020-11-29 18:15:20,053 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 18:15:20,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5366, Invalid=5976, Unknown=0, NotChecked=0, Total=11342 [2020-11-29 18:15:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 18:15:20,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 18:15:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 18:15:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 18:15:20,069 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 240 [2020-11-29 18:15:20,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:15:20,069 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:15:20,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-11-29 18:15:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 18:15:20,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 18:15:20,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:20,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 18:15:22,634 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 672 DAG size of output: 663 [2020-11-29 18:16:42,203 WARN L193 SmtUtils]: Spent 1.33 m on a formula simplification. DAG size of input: 5172 DAG size of output: 1950 [2020-11-29 18:16:50,923 WARN L193 SmtUtils]: Spent 8.69 s on a formula simplification. DAG size of input: 663 DAG size of output: 59 [2020-11-29 18:18:23,751 WARN L193 SmtUtils]: Spent 1.55 m on a formula simplification. DAG size of input: 1928 DAG size of output: 363 [2020-11-29 18:18:23,754 INFO L274 CegarLoopResult]: For program point L31-2(lines 31 35) no Hoare annotation was computed. [2020-11-29 18:18:23,755 INFO L270 CegarLoopResult]: At program point L31-3(lines 31 35) the Hoare annotation is: (let ((.cse0 (<= 10 ULTIMATE.start_main_~m~0)) (.cse1 (<= 10 ULTIMATE.start_main_~n~0))) (or (and .cse0 .cse1 (<= 100 ULTIMATE.start_main_~k~0)) (and .cse0 (<= ULTIMATE.start_main_~i~0 5) .cse1 (<= 50 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= ULTIMATE.start_main_~i~0 3) (<= 30 ULTIMATE.start_main_~k~0)) (and .cse0 (<= 90 ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~i~0 9) .cse1) (and .cse0 (<= 40 ULTIMATE.start_main_~k~0) .cse1 (<= ULTIMATE.start_main_~i~0 4)) (and .cse0 (= ULTIMATE.start_main_~i~0 0) .cse1 (<= 0 ULTIMATE.start_main_~k~0)) (and .cse0 (<= 80 ULTIMATE.start_main_~k~0) .cse1 (<= ULTIMATE.start_main_~i~0 8)) (and .cse0 (<= ULTIMATE.start_main_~i~0 6) .cse1 (<= 60 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= 20 ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~i~0 2)) (and .cse0 (<= 10 ULTIMATE.start_main_~k~0) .cse1 (<= ULTIMATE.start_main_~i~0 1)) (and .cse0 .cse1 (<= 70 ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~i~0 7)))) [2020-11-29 18:18:23,755 INFO L274 CegarLoopResult]: For program point L31-4(lines 31 35) no Hoare annotation was computed. [2020-11-29 18:18:23,755 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-29 18:18:23,755 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 18:18:23,755 INFO L274 CegarLoopResult]: For program point L32-2(lines 32 34) no Hoare annotation was computed. [2020-11-29 18:18:23,755 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 18:18:23,756 INFO L270 CegarLoopResult]: At program point L32-3(lines 32 34) the Hoare annotation is: (let ((.cse8 (<= 70 ULTIMATE.start_main_~k~0)) (.cse17 (<= 50 ULTIMATE.start_main_~k~0)) (.cse28 (<= 30 ULTIMATE.start_main_~k~0)) (.cse19 (<= 40 ULTIMATE.start_main_~k~0)) (.cse27 (<= 10 ULTIMATE.start_main_~k~0)) (.cse21 (<= ULTIMATE.start_main_~i~0 5)) (.cse30 (<= 60 ULTIMATE.start_main_~k~0)) (.cse26 (<= 90 ULTIMATE.start_main_~k~0)) (.cse12 (= ULTIMATE.start_main_~i~0 0)) (.cse10 (<= ULTIMATE.start_main_~i~0 2)) (.cse14 (<= ULTIMATE.start_main_~j~0 6)) (.cse29 (<= 20 ULTIMATE.start_main_~k~0)) (.cse16 (<= ULTIMATE.start_main_~i~0 1)) (.cse11 (<= ULTIMATE.start_main_~j~0 2)) (.cse15 (<= ULTIMATE.start_main_~j~0 1)) (.cse5 (<= ULTIMATE.start_main_~j~0 8)) (.cse22 (<= ULTIMATE.start_main_~j~0 7)) (.cse18 (<= ULTIMATE.start_main_~i~0 4)) (.cse25 (<= ULTIMATE.start_main_~j~0 4)) (.cse6 (<= ULTIMATE.start_main_~i~0 7)) (.cse9 (<= ULTIMATE.start_main_~j~0 9)) (.cse2 (<= (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0)) (.cse23 (<= ULTIMATE.start_main_~i~0 6)) (.cse3 (<= ULTIMATE.start_main_~j~0 5)) (.cse24 (<= 80 ULTIMATE.start_main_~k~0)) (.cse7 (= ULTIMATE.start_main_~j~0 0)) (.cse4 (<= ULTIMATE.start_main_~i~0 8)) (.cse0 (<= 10 ULTIMATE.start_main_~m~0)) (.cse1 (<= 10 ULTIMATE.start_main_~n~0)) (.cse20 (<= ULTIMATE.start_main_~j~0 3)) (.cse13 (<= ULTIMATE.start_main_~i~0 3))) (or (and .cse0 .cse1 .cse2 (<= 100 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= 85 ULTIMATE.start_main_~k~0) .cse3 .cse4) (and .cse0 .cse5 .cse1 .cse6 (<= 78 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 .cse7 .cse8 .cse6) (and .cse0 .cse9 .cse1 (<= 29 ULTIMATE.start_main_~k~0) .cse10) (and (<= 2 ULTIMATE.start_main_~k~0) .cse0 .cse11 .cse12 .cse1) (and .cse0 .cse1 .cse13 (<= 36 ULTIMATE.start_main_~k~0) .cse14) (and .cse0 .cse2 .cse1 .cse15 (<= 91 ULTIMATE.start_main_~k~0)) (and .cse0 .cse11 (<= 12 ULTIMATE.start_main_~k~0) .cse1 .cse16) (and .cse0 .cse1 .cse17 .cse18) (and .cse0 .cse19 .cse1 .cse13) (and .cse0 (<= 22 ULTIMATE.start_main_~k~0) .cse11 .cse1 .cse10) (and .cse0 .cse1 .cse20 (<= 13 ULTIMATE.start_main_~k~0) .cse16) (and .cse0 .cse9 .cse2 .cse1 (<= 99 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 .cse15 .cse4 (<= 81 ULTIMATE.start_main_~k~0)) (and .cse0 .cse21 (<= 57 ULTIMATE.start_main_~k~0) .cse1 .cse22) (and .cse0 .cse11 .cse23 .cse1 (<= 62 ULTIMATE.start_main_~k~0)) (and .cse0 (<= 17 ULTIMATE.start_main_~k~0) .cse1 .cse22 .cse16) (and .cse0 .cse1 (<= 46 ULTIMATE.start_main_~k~0) .cse14 .cse18) (and .cse0 .cse23 .cse1 (<= 66 ULTIMATE.start_main_~k~0) .cse14) (and .cse0 .cse24 .cse1 .cse6) (and .cse0 .cse21 .cse1 .cse15 (<= 51 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 .cse20 (<= 83 ULTIMATE.start_main_~k~0) .cse4) (and .cse0 (<= 21 ULTIMATE.start_main_~k~0) .cse1 .cse15 .cse10) (and .cse0 .cse5 .cse1 .cse13 (<= 38 ULTIMATE.start_main_~k~0)) (and .cse0 .cse25 .cse1 (<= 24 ULTIMATE.start_main_~k~0) .cse10) (and .cse0 .cse26 .cse2 .cse1 .cse7) (and .cse0 .cse23 .cse1 .cse8) (and .cse0 .cse12 .cse1 .cse22 (<= 7 ULTIMATE.start_main_~k~0)) (and .cse0 .cse9 .cse21 .cse1 (<= 59 ULTIMATE.start_main_~k~0)) (and .cse0 .cse12 .cse1 .cse20 (<= 3 ULTIMATE.start_main_~k~0)) (and .cse0 (<= 27 ULTIMATE.start_main_~k~0) .cse1 .cse22 .cse10) (and .cse0 (<= 16 ULTIMATE.start_main_~k~0) .cse1 .cse16 .cse14) (and .cse0 .cse25 .cse23 .cse1 (<= 64 ULTIMATE.start_main_~k~0)) (and .cse0 .cse12 .cse27 .cse1) (and .cse0 (<= 34 ULTIMATE.start_main_~k~0) .cse25 .cse1 .cse13) (and .cse0 .cse1 .cse10 .cse3 (<= 25 ULTIMATE.start_main_~k~0)) (and .cse0 (<= 82 ULTIMATE.start_main_~k~0) .cse11 .cse1 .cse4) (and .cse0 (<= 23 ULTIMATE.start_main_~k~0) .cse1 .cse20 .cse10) (and .cse0 (<= 39 ULTIMATE.start_main_~k~0) .cse9 .cse1 .cse13) (and .cse0 .cse12 .cse1 (<= 5 ULTIMATE.start_main_~k~0) .cse3) (and .cse0 (<= 76 ULTIMATE.start_main_~k~0) .cse1 .cse6 .cse14) (and .cse0 .cse9 .cse1 (<= 79 ULTIMATE.start_main_~k~0) .cse6) (and .cse0 .cse1 .cse28 .cse10) (and .cse0 .cse21 .cse1 .cse3 (<= 55 ULTIMATE.start_main_~k~0)) (and .cse0 .cse21 .cse1 (<= 56 ULTIMATE.start_main_~k~0) .cse14) (and .cse0 .cse21 .cse5 .cse1 (<= 58 ULTIMATE.start_main_~k~0)) (and .cse0 .cse12 (<= 6 ULTIMATE.start_main_~k~0) .cse1 .cse14) (and .cse0 .cse23 .cse5 .cse1 (<= 68 ULTIMATE.start_main_~k~0)) (and .cse0 .cse12 .cse1 .cse7 (<= 0 ULTIMATE.start_main_~k~0)) (and .cse0 .cse21 .cse11 .cse1 (<= 52 ULTIMATE.start_main_~k~0)) (and .cse0 .cse11 .cse2 .cse1 (<= 92 ULTIMATE.start_main_~k~0)) (and .cse0 (<= 54 ULTIMATE.start_main_~k~0) .cse21 .cse25 .cse1) (and .cse0 (<= 31 ULTIMATE.start_main_~k~0) .cse1 .cse13 .cse15) (and .cse0 .cse21 .cse1 .cse17 .cse7) (and .cse0 (<= 42 ULTIMATE.start_main_~k~0) .cse11 .cse1 .cse18) (and .cse0 .cse1 .cse7 .cse13 .cse28) (and .cse0 .cse9 .cse12 .cse1 (<= 9 ULTIMATE.start_main_~k~0)) (and .cse0 .cse2 .cse1 (<= 97 ULTIMATE.start_main_~k~0) .cse22) (and .cse0 .cse2 .cse1 (<= 95 ULTIMATE.start_main_~k~0) .cse3) (and .cse0 (<= 11 ULTIMATE.start_main_~k~0) .cse1 .cse16 .cse15) (and .cse0 .cse25 .cse12 .cse1 (<= 4 ULTIMATE.start_main_~k~0)) (and .cse0 .cse19 .cse1 .cse7 .cse18) (and .cse0 (<= 37 ULTIMATE.start_main_~k~0) .cse1 .cse22 .cse13) (and .cse0 .cse1 .cse29 .cse7 .cse10) (and .cse0 .cse21 .cse1 .cse20 (<= 53 ULTIMATE.start_main_~k~0)) (and .cse0 .cse5 (<= 98 ULTIMATE.start_main_~k~0) .cse2 .cse1) (and .cse0 .cse23 .cse1 .cse7 .cse30) (and .cse0 .cse11 .cse1 (<= 32 ULTIMATE.start_main_~k~0) .cse13) (and (<= 44 ULTIMATE.start_main_~k~0) .cse0 .cse25 .cse1 .cse18) (and .cse0 (<= 45 ULTIMATE.start_main_~k~0) .cse1 .cse3 .cse18) (and .cse0 .cse27 .cse1 .cse7 .cse16) (and .cse0 .cse1 .cse3 .cse6 (<= 75 ULTIMATE.start_main_~k~0)) (and (<= 49 ULTIMATE.start_main_~k~0) .cse0 .cse9 .cse1 .cse18) (and .cse0 .cse5 (<= 28 ULTIMATE.start_main_~k~0) .cse1 .cse10) (and .cse0 .cse1 .cse22 .cse6 (<= 77 ULTIMATE.start_main_~k~0)) (and .cse0 .cse23 .cse1 .cse22 (<= 67 ULTIMATE.start_main_~k~0)) (and .cse0 .cse2 .cse1 (<= 96 ULTIMATE.start_main_~k~0) .cse14) (and .cse0 .cse1 (<= 73 ULTIMATE.start_main_~k~0) .cse20 .cse6) (and .cse0 .cse1 .cse20 (<= 43 ULTIMATE.start_main_~k~0) .cse18) (and .cse0 .cse5 .cse1 (<= 48 ULTIMATE.start_main_~k~0) .cse18) (and .cse0 .cse12 .cse1 (<= 1 ULTIMATE.start_main_~k~0) .cse15) (and .cse0 (<= 41 ULTIMATE.start_main_~k~0) .cse1 .cse15 .cse18) (and .cse0 .cse21 .cse1 .cse30) (and .cse0 .cse26 .cse1 .cse4) (and (<= 84 ULTIMATE.start_main_~k~0) .cse0 .cse25 .cse1 .cse4) (and .cse0 .cse23 (<= 63 ULTIMATE.start_main_~k~0) .cse1 .cse20) (and .cse0 .cse5 .cse12 (<= 8 ULTIMATE.start_main_~k~0) .cse1) (and .cse0 .cse1 (<= 86 ULTIMATE.start_main_~k~0) .cse4 .cse14) (and .cse0 .cse1 .cse10 (<= 26 ULTIMATE.start_main_~k~0) .cse14) (and .cse0 .cse1 (<= 15 ULTIMATE.start_main_~k~0) .cse16 .cse3) (and .cse0 .cse1 .cse29 .cse16) (and .cse0 (<= 14 ULTIMATE.start_main_~k~0) .cse25 .cse1 .cse16) (and .cse0 (<= 71 ULTIMATE.start_main_~k~0) .cse1 .cse15 .cse6) (and .cse0 .cse9 .cse1 (<= 19 ULTIMATE.start_main_~k~0) .cse16) (and .cse0 .cse5 .cse1 (<= 18 ULTIMATE.start_main_~k~0) .cse16) (and .cse0 (<= 72 ULTIMATE.start_main_~k~0) .cse11 .cse1 .cse6) (and .cse0 .cse25 .cse1 .cse2 (<= 94 ULTIMATE.start_main_~k~0)) (and .cse0 .cse9 .cse1 (<= 89 ULTIMATE.start_main_~k~0) .cse4) (and .cse0 .cse23 (<= 61 ULTIMATE.start_main_~k~0) .cse1 .cse15) (and .cse0 .cse1 .cse22 (<= 87 ULTIMATE.start_main_~k~0) .cse4) (and .cse0 .cse5 .cse1 (<= 88 ULTIMATE.start_main_~k~0) .cse4) (and .cse0 .cse1 .cse22 (<= 47 ULTIMATE.start_main_~k~0) .cse18) (and .cse0 .cse25 .cse1 (<= 74 ULTIMATE.start_main_~k~0) .cse6) (and .cse0 (<= 69 ULTIMATE.start_main_~k~0) .cse9 .cse23 .cse1) (and (<= 93 ULTIMATE.start_main_~k~0) .cse0 .cse2 .cse1 .cse20) (and .cse0 .cse1 .cse13 (<= 35 ULTIMATE.start_main_~k~0) .cse3) (and .cse0 .cse23 .cse1 .cse3 (<= 65 ULTIMATE.start_main_~k~0)) (and .cse0 .cse24 .cse1 .cse7 .cse4) (and .cse0 .cse1 (<= 33 ULTIMATE.start_main_~k~0) .cse20 .cse13))) [2020-11-29 18:18:23,757 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 18:18:23,757 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-29 18:18:23,757 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-29 18:18:23,757 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-29 18:18:23,757 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-29 18:18:23,757 INFO L277 CegarLoopResult]: At program point L37(lines 24 38) the Hoare annotation is: true [2020-11-29 18:18:23,757 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 18:18:23,757 INFO L274 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-11-29 18:18:23,757 INFO L274 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-11-29 18:18:23,757 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-29 18:18:23,757 INFO L270 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (<= 10 ULTIMATE.start_main_~n~0) [2020-11-29 18:18:23,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:18:23 BoogieIcfgContainer [2020-11-29 18:18:23,805 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:18:23,805 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:18:23,806 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:18:23,806 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:18:23,806 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:14:57" (3/4) ... [2020-11-29 18:18:23,809 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 18:18:23,838 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 18:18:23,838 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 18:18:23,838 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 18:18:23,838 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 18:18:23,889 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d5bd3c52-b4dc-4b79-8c33-eaa2adb15c6c/bin/uautomizer/witness.graphml [2020-11-29 18:18:23,889 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:18:23,891 INFO L168 Benchmark]: Toolchain (without parser) took 207034.71 ms. Allocated memory was 81.8 MB in the beginning and 6.2 GB in the end (delta: 6.1 GB). Free memory was 49.5 MB in the beginning and 5.4 GB in the end (delta: -5.4 GB). Peak memory consumption was 728.3 MB. Max. memory is 16.1 GB. [2020-11-29 18:18:23,891 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 56.6 MB in the beginning and 56.6 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:18:23,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.91 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 49.3 MB in the beginning and 78.6 MB in the end (delta: -29.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-11-29 18:18:23,892 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.03 ms. Allocated memory is still 100.7 MB. Free memory was 78.6 MB in the beginning and 77.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:18:23,893 INFO L168 Benchmark]: Boogie Preprocessor took 30.95 ms. Allocated memory is still 100.7 MB. Free memory was 77.3 MB in the beginning and 76.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:18:23,893 INFO L168 Benchmark]: RCFGBuilder took 279.47 ms. Allocated memory is still 100.7 MB. Free memory was 76.1 MB in the beginning and 64.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:18:23,894 INFO L168 Benchmark]: TraceAbstraction took 206232.57 ms. Allocated memory was 100.7 MB in the beginning and 6.2 GB in the end (delta: 6.1 GB). Free memory was 63.5 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.1 GB. [2020-11-29 18:18:23,894 INFO L168 Benchmark]: Witness Printer took 83.91 ms. Allocated memory is still 6.2 GB. Free memory was 5.4 GB in the beginning and 5.4 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:18:23,897 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 56.6 MB in the beginning and 56.6 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 346.91 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 49.3 MB in the beginning and 78.6 MB in the end (delta: -29.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.03 ms. Allocated memory is still 100.7 MB. Free memory was 78.6 MB in the beginning and 77.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.95 ms. Allocated memory is still 100.7 MB. Free memory was 77.3 MB in the beginning and 76.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 279.47 ms. Allocated memory is still 100.7 MB. Free memory was 76.1 MB in the beginning and 64.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 206232.57 ms. Allocated memory was 100.7 MB in the beginning and 6.2 GB in the end (delta: 6.1 GB). Free memory was 63.5 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.1 GB. * Witness Printer took 83.91 ms. Allocated memory is still 6.2 GB. Free memory was 5.4 GB in the beginning and 5.4 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 10 <= n - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (((((((((((10 <= m && 10 <= n) && 100 <= k) || (((10 <= m && i <= 5) && 10 <= n) && 50 <= k)) || (((10 <= m && 10 <= n) && i <= 3) && 30 <= k)) || (((10 <= m && 90 <= k) && i <= 9) && 10 <= n)) || (((10 <= m && 40 <= k) && 10 <= n) && i <= 4)) || (((10 <= m && i == 0) && 10 <= n) && 0 <= k)) || (((10 <= m && 80 <= k) && 10 <= n) && i <= 8)) || (((10 <= m && i <= 6) && 10 <= n) && 60 <= k)) || (((10 <= m && 10 <= n) && 20 <= k) && i <= 2)) || (((10 <= m && 10 <= k) && 10 <= n) && i <= 1)) || (((10 <= m && 10 <= n) && 70 <= k) && i <= 7) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((10 <= m && 10 <= n) && i + 1 <= n) && 100 <= k) || ((((10 <= m && 10 <= n) && 85 <= k) && j <= 5) && i <= 8)) || ((((10 <= m && j <= 8) && 10 <= n) && i <= 7) && 78 <= k)) || ((((10 <= m && 10 <= n) && j == 0) && 70 <= k) && i <= 7)) || ((((10 <= m && j <= 9) && 10 <= n) && 29 <= k) && i <= 2)) || ((((2 <= k && 10 <= m) && j <= 2) && i == 0) && 10 <= n)) || ((((10 <= m && 10 <= n) && i <= 3) && 36 <= k) && j <= 6)) || ((((10 <= m && i + 1 <= n) && 10 <= n) && j <= 1) && 91 <= k)) || ((((10 <= m && j <= 2) && 12 <= k) && 10 <= n) && i <= 1)) || (((10 <= m && 10 <= n) && 50 <= k) && i <= 4)) || (((10 <= m && 40 <= k) && 10 <= n) && i <= 3)) || ((((10 <= m && 22 <= k) && j <= 2) && 10 <= n) && i <= 2)) || ((((10 <= m && 10 <= n) && j <= 3) && 13 <= k) && i <= 1)) || ((((10 <= m && j <= 9) && i + 1 <= n) && 10 <= n) && 99 <= k)) || ((((10 <= m && 10 <= n) && j <= 1) && i <= 8) && 81 <= k)) || ((((10 <= m && i <= 5) && 57 <= k) && 10 <= n) && j <= 7)) || ((((10 <= m && j <= 2) && i <= 6) && 10 <= n) && 62 <= k)) || ((((10 <= m && 17 <= k) && 10 <= n) && j <= 7) && i <= 1)) || ((((10 <= m && 10 <= n) && 46 <= k) && j <= 6) && i <= 4)) || ((((10 <= m && i <= 6) && 10 <= n) && 66 <= k) && j <= 6)) || (((10 <= m && 80 <= k) && 10 <= n) && i <= 7)) || ((((10 <= m && i <= 5) && 10 <= n) && j <= 1) && 51 <= k)) || ((((10 <= m && 10 <= n) && j <= 3) && 83 <= k) && i <= 8)) || ((((10 <= m && 21 <= k) && 10 <= n) && j <= 1) && i <= 2)) || ((((10 <= m && j <= 8) && 10 <= n) && i <= 3) && 38 <= k)) || ((((10 <= m && j <= 4) && 10 <= n) && 24 <= k) && i <= 2)) || ((((10 <= m && 90 <= k) && i + 1 <= n) && 10 <= n) && j == 0)) || (((10 <= m && i <= 6) && 10 <= n) && 70 <= k)) || ((((10 <= m && i == 0) && 10 <= n) && j <= 7) && 7 <= k)) || ((((10 <= m && j <= 9) && i <= 5) && 10 <= n) && 59 <= k)) || ((((10 <= m && i == 0) && 10 <= n) && j <= 3) && 3 <= k)) || ((((10 <= m && 27 <= k) && 10 <= n) && j <= 7) && i <= 2)) || ((((10 <= m && 16 <= k) && 10 <= n) && i <= 1) && j <= 6)) || ((((10 <= m && j <= 4) && i <= 6) && 10 <= n) && 64 <= k)) || (((10 <= m && i == 0) && 10 <= k) && 10 <= n)) || ((((10 <= m && 34 <= k) && j <= 4) && 10 <= n) && i <= 3)) || ((((10 <= m && 10 <= n) && i <= 2) && j <= 5) && 25 <= k)) || ((((10 <= m && 82 <= k) && j <= 2) && 10 <= n) && i <= 8)) || ((((10 <= m && 23 <= k) && 10 <= n) && j <= 3) && i <= 2)) || ((((10 <= m && 39 <= k) && j <= 9) && 10 <= n) && i <= 3)) || ((((10 <= m && i == 0) && 10 <= n) && 5 <= k) && j <= 5)) || ((((10 <= m && 76 <= k) && 10 <= n) && i <= 7) && j <= 6)) || ((((10 <= m && j <= 9) && 10 <= n) && 79 <= k) && i <= 7)) || (((10 <= m && 10 <= n) && 30 <= k) && i <= 2)) || ((((10 <= m && i <= 5) && 10 <= n) && j <= 5) && 55 <= k)) || ((((10 <= m && i <= 5) && 10 <= n) && 56 <= k) && j <= 6)) || ((((10 <= m && i <= 5) && j <= 8) && 10 <= n) && 58 <= k)) || ((((10 <= m && i == 0) && 6 <= k) && 10 <= n) && j <= 6)) || ((((10 <= m && i <= 6) && j <= 8) && 10 <= n) && 68 <= k)) || ((((10 <= m && i == 0) && 10 <= n) && j == 0) && 0 <= k)) || ((((10 <= m && i <= 5) && j <= 2) && 10 <= n) && 52 <= k)) || ((((10 <= m && j <= 2) && i + 1 <= n) && 10 <= n) && 92 <= k)) || ((((10 <= m && 54 <= k) && i <= 5) && j <= 4) && 10 <= n)) || ((((10 <= m && 31 <= k) && 10 <= n) && i <= 3) && j <= 1)) || ((((10 <= m && i <= 5) && 10 <= n) && 50 <= k) && j == 0)) || ((((10 <= m && 42 <= k) && j <= 2) && 10 <= n) && i <= 4)) || ((((10 <= m && 10 <= n) && j == 0) && i <= 3) && 30 <= k)) || ((((10 <= m && j <= 9) && i == 0) && 10 <= n) && 9 <= k)) || ((((10 <= m && i + 1 <= n) && 10 <= n) && 97 <= k) && j <= 7)) || ((((10 <= m && i + 1 <= n) && 10 <= n) && 95 <= k) && j <= 5)) || ((((10 <= m && 11 <= k) && 10 <= n) && i <= 1) && j <= 1)) || ((((10 <= m && j <= 4) && i == 0) && 10 <= n) && 4 <= k)) || ((((10 <= m && 40 <= k) && 10 <= n) && j == 0) && i <= 4)) || ((((10 <= m && 37 <= k) && 10 <= n) && j <= 7) && i <= 3)) || ((((10 <= m && 10 <= n) && 20 <= k) && j == 0) && i <= 2)) || ((((10 <= m && i <= 5) && 10 <= n) && j <= 3) && 53 <= k)) || ((((10 <= m && j <= 8) && 98 <= k) && i + 1 <= n) && 10 <= n)) || ((((10 <= m && i <= 6) && 10 <= n) && j == 0) && 60 <= k)) || ((((10 <= m && j <= 2) && 10 <= n) && 32 <= k) && i <= 3)) || ((((44 <= k && 10 <= m) && j <= 4) && 10 <= n) && i <= 4)) || ((((10 <= m && 45 <= k) && 10 <= n) && j <= 5) && i <= 4)) || ((((10 <= m && 10 <= k) && 10 <= n) && j == 0) && i <= 1)) || ((((10 <= m && 10 <= n) && j <= 5) && i <= 7) && 75 <= k)) || ((((49 <= k && 10 <= m) && j <= 9) && 10 <= n) && i <= 4)) || ((((10 <= m && j <= 8) && 28 <= k) && 10 <= n) && i <= 2)) || ((((10 <= m && 10 <= n) && j <= 7) && i <= 7) && 77 <= k)) || ((((10 <= m && i <= 6) && 10 <= n) && j <= 7) && 67 <= k)) || ((((10 <= m && i + 1 <= n) && 10 <= n) && 96 <= k) && j <= 6)) || ((((10 <= m && 10 <= n) && 73 <= k) && j <= 3) && i <= 7)) || ((((10 <= m && 10 <= n) && j <= 3) && 43 <= k) && i <= 4)) || ((((10 <= m && j <= 8) && 10 <= n) && 48 <= k) && i <= 4)) || ((((10 <= m && i == 0) && 10 <= n) && 1 <= k) && j <= 1)) || ((((10 <= m && 41 <= k) && 10 <= n) && j <= 1) && i <= 4)) || (((10 <= m && i <= 5) && 10 <= n) && 60 <= k)) || (((10 <= m && 90 <= k) && 10 <= n) && i <= 8)) || ((((84 <= k && 10 <= m) && j <= 4) && 10 <= n) && i <= 8)) || ((((10 <= m && i <= 6) && 63 <= k) && 10 <= n) && j <= 3)) || ((((10 <= m && j <= 8) && i == 0) && 8 <= k) && 10 <= n)) || ((((10 <= m && 10 <= n) && 86 <= k) && i <= 8) && j <= 6)) || ((((10 <= m && 10 <= n) && i <= 2) && 26 <= k) && j <= 6)) || ((((10 <= m && 10 <= n) && 15 <= k) && i <= 1) && j <= 5)) || (((10 <= m && 10 <= n) && 20 <= k) && i <= 1)) || ((((10 <= m && 14 <= k) && j <= 4) && 10 <= n) && i <= 1)) || ((((10 <= m && 71 <= k) && 10 <= n) && j <= 1) && i <= 7)) || ((((10 <= m && j <= 9) && 10 <= n) && 19 <= k) && i <= 1)) || ((((10 <= m && j <= 8) && 10 <= n) && 18 <= k) && i <= 1)) || ((((10 <= m && 72 <= k) && j <= 2) && 10 <= n) && i <= 7)) || ((((10 <= m && j <= 4) && 10 <= n) && i + 1 <= n) && 94 <= k)) || ((((10 <= m && j <= 9) && 10 <= n) && 89 <= k) && i <= 8)) || ((((10 <= m && i <= 6) && 61 <= k) && 10 <= n) && j <= 1)) || ((((10 <= m && 10 <= n) && j <= 7) && 87 <= k) && i <= 8)) || ((((10 <= m && j <= 8) && 10 <= n) && 88 <= k) && i <= 8)) || ((((10 <= m && 10 <= n) && j <= 7) && 47 <= k) && i <= 4)) || ((((10 <= m && j <= 4) && 10 <= n) && 74 <= k) && i <= 7)) || ((((10 <= m && 69 <= k) && j <= 9) && i <= 6) && 10 <= n)) || ((((93 <= k && 10 <= m) && i + 1 <= n) && 10 <= n) && j <= 3)) || ((((10 <= m && 10 <= n) && i <= 3) && 35 <= k) && j <= 5)) || ((((10 <= m && i <= 6) && 10 <= n) && j <= 5) && 65 <= k)) || ((((10 <= m && 80 <= k) && 10 <= n) && j == 0) && i <= 8)) || ((((10 <= m && 10 <= n) && 33 <= k) && j <= 3) && i <= 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.6s, OverallIterations: 19, TraceHistogramMax: 100, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 183.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 597 SDtfs, 1224 SDslu, 2109 SDs, 0 SdLazy, 1132 SolverSat, 249 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1932 GetRequests, 1556 SyntacticMatches, 0 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 10.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=241occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 206 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 5123 NumberOfFragments, 1898 HoareAnnotationTreeSize, 4 FomulaSimplifications, 5953680 FormulaSimplificationTreeSizeReduction, 81.9s HoareSimplificationTime, 4 FomulaSimplificationsInter, 97919 FormulaSimplificationTreeSizeReductionInter, 101.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 3295 NumberOfCodeBlocks, 3244 NumberOfCodeBlocksAsserted, 304 NumberOfCheckSat, 3259 ConstructedInterpolants, 0 QuantifiedInterpolants, 2398292 SizeOfPredicates, 35 NumberOfNonLiveVariables, 4301 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 36 InterpolantComputations, 3 PerfectInterpolantSequences, 34349/88241 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...