./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/sumt8.c --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_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/sumt8.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 9dc8ca4954e14958c8c0d82261bfa8f8ff442173 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:45:15,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:45:15,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:45:15,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:45:15,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:45:15,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:45:15,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:45:15,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:45:15,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:45:15,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:45:15,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:45:15,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:45:15,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:45:15,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:45:15,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:45:15,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:45:15,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:45:15,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:45:15,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:45:15,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:45:15,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:45:15,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:45:15,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:45:15,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:45:15,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:45:15,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:45:15,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:45:15,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:45:15,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:45:15,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:45:15,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:45:15,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:45:15,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:45:15,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:45:15,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:45:15,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:45:15,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:45:15,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:45:15,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:45:15,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:45:15,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:45:15,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:45:15,877 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:45:15,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:45:15,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:45:15,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:45:15,888 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:45:15,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:45:15,889 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:45:15,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:45:15,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:45:15,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:45:15,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:45:15,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:45:15,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:45:15,892 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:45:15,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:45:15,893 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:45:15,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:45:15,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:45:15,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:45:15,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:45:15,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:45:15,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:45:15,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:45:15,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:45:15,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:45:15,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:45:15,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:45:15,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:45:15,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:45:15,897 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_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dc8ca4954e14958c8c0d82261bfa8f8ff442173 [2020-11-29 19:45:16,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:45:16,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:45:16,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:45:16,287 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:45:16,289 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:45:16,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/../../sv-benchmarks/c/loops-crafted-1/sumt8.c [2020-11-29 19:45:16,391 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/data/1140d4109/b01e1988bf474576b7dd71947dde4ba9/FLAGfb23a5a1a [2020-11-29 19:45:16,963 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:45:16,964 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/sv-benchmarks/c/loops-crafted-1/sumt8.c [2020-11-29 19:45:16,972 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/data/1140d4109/b01e1988bf474576b7dd71947dde4ba9/FLAGfb23a5a1a [2020-11-29 19:45:17,330 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/data/1140d4109/b01e1988bf474576b7dd71947dde4ba9 [2020-11-29 19:45:17,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:45:17,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:45:17,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:45:17,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:45:17,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:45:17,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6753585f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17, skipping insertion in model container [2020-11-29 19:45:17,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:45:17,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:45:17,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:45:17,640 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:45:17,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:45:17,720 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:45:17,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17 WrapperNode [2020-11-29 19:45:17,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:45:17,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:45:17,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:45:17,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:45:17,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:45:17,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:45:17,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:45:17,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:45:17,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... [2020-11-29 19:45:17,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:45:17,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:45:17,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:45:17,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:45:17,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:45:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:45:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:45:17,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:45:18,309 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:45:18,309 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 19:45:18,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:45:18 BoogieIcfgContainer [2020-11-29 19:45:18,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:45:18,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:45:18,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:45:18,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:45:18,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:45:17" (1/3) ... [2020-11-29 19:45:18,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a4eb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:45:18, skipping insertion in model container [2020-11-29 19:45:18,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:45:17" (2/3) ... [2020-11-29 19:45:18,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a4eb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:45:18, skipping insertion in model container [2020-11-29 19:45:18,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:45:18" (3/3) ... [2020-11-29 19:45:18,332 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2020-11-29 19:45:18,346 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:45:18,352 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:45:18,370 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:45:18,438 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:45:18,439 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:45:18,439 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:45:18,440 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:45:18,440 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:45:18,440 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:45:18,440 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:45:18,441 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:45:18,483 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-29 19:45:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 19:45:18,489 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:18,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:18,491 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:18,518 INFO L82 PathProgramCache]: Analyzing trace with hash 183352048, now seen corresponding path program 1 times [2020-11-29 19:45:18,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:18,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658875501] [2020-11-29 19:45:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:19,058 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 19:45:19,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658875501] [2020-11-29 19:45:19,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:45:19,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:45:19,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989742233] [2020-11-29 19:45:19,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:45:19,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:19,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:45:19,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:45:19,107 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-11-29 19:45:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:19,291 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2020-11-29 19:45:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:45:19,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-29 19:45:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:19,320 INFO L225 Difference]: With dead ends: 44 [2020-11-29 19:45:19,320 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 19:45:19,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:45:19,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 19:45:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-29 19:45:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-29 19:45:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2020-11-29 19:45:19,387 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 8 [2020-11-29 19:45:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:19,388 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2020-11-29 19:45:19,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:45:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-11-29 19:45:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:45:19,391 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:19,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:19,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:45:19,393 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash 543311139, now seen corresponding path program 1 times [2020-11-29 19:45:19,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:19,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166610651] [2020-11-29 19:45:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:19,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166610651] [2020-11-29 19:45:19,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066977563] [2020-11-29 19:45:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:19,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:45:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:19,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:19,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 19:45:19,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822401667] [2020-11-29 19:45:19,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:45:19,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:45:19,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:45:19,801 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 5 states. [2020-11-29 19:45:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:22,135 INFO L93 Difference]: Finished difference Result 52 states and 80 transitions. [2020-11-29 19:45:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:45:22,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-29 19:45:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:22,138 INFO L225 Difference]: With dead ends: 52 [2020-11-29 19:45:22,138 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 19:45:22,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:45:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 19:45:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-11-29 19:45:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 19:45:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-11-29 19:45:22,150 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 12 [2020-11-29 19:45:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:22,151 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-11-29 19:45:22,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:45:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-11-29 19:45:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:45:22,153 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:22,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:22,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 19:45:22,368 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:22,369 INFO L82 PathProgramCache]: Analyzing trace with hash -176145870, now seen corresponding path program 1 times [2020-11-29 19:45:22,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:22,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564525236] [2020-11-29 19:45:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:22,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564525236] [2020-11-29 19:45:22,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130296395] [2020-11-29 19:45:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:22,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-29 19:45:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:23,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:45:23,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:45:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:23,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:23,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-11-29 19:45:23,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115569018] [2020-11-29 19:45:23,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:45:23,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:45:23,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:45:23,123 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 10 states. [2020-11-29 19:45:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:23,489 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2020-11-29 19:45:23,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:45:23,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-11-29 19:45:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:23,494 INFO L225 Difference]: With dead ends: 40 [2020-11-29 19:45:23,494 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 19:45:23,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:45:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 19:45:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-11-29 19:45:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 19:45:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-11-29 19:45:23,507 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2020-11-29 19:45:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:23,508 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-11-29 19:45:23,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:45:23,508 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-11-29 19:45:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:45:23,509 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:23,509 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:23,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:45:23,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:23,714 INFO L82 PathProgramCache]: Analyzing trace with hash -189133261, now seen corresponding path program 1 times [2020-11-29 19:45:23,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:23,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133831072] [2020-11-29 19:45:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:24,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133831072] [2020-11-29 19:45:24,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796560419] [2020-11-29 19:45:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:24,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 19:45:24,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:24,422 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:45:24,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:45:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:24,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:24,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2020-11-29 19:45:24,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610679306] [2020-11-29 19:45:24,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:45:24,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:24,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:45:24,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:45:24,576 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 11 states. [2020-11-29 19:45:25,112 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-11-29 19:45:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:25,566 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2020-11-29 19:45:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:45:25,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-11-29 19:45:25,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:25,569 INFO L225 Difference]: With dead ends: 62 [2020-11-29 19:45:25,569 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 19:45:25,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:45:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 19:45:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-29 19:45:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 19:45:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-11-29 19:45:25,581 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2020-11-29 19:45:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:25,581 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-11-29 19:45:25,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:45:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-11-29 19:45:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 19:45:25,583 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:25,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:25,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:45:25,810 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:25,811 INFO L82 PathProgramCache]: Analyzing trace with hash 691349046, now seen corresponding path program 1 times [2020-11-29 19:45:25,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:25,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011477821] [2020-11-29 19:45:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:26,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011477821] [2020-11-29 19:45:26,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596734885] [2020-11-29 19:45:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:26,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 19:45:26,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:26,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:45:26,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:45:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:26,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:26,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-29 19:45:26,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195704693] [2020-11-29 19:45:26,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:45:26,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:45:26,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:45:26,710 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 14 states. [2020-11-29 19:45:27,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:27,261 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-11-29 19:45:27,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:45:27,265 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-11-29 19:45:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:27,266 INFO L225 Difference]: With dead ends: 50 [2020-11-29 19:45:27,266 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 19:45:27,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:45:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 19:45:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-11-29 19:45:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 19:45:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-11-29 19:45:27,286 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2020-11-29 19:45:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:27,287 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-11-29 19:45:27,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:45:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-11-29 19:45:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 19:45:27,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:27,290 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:27,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:45:27,506 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:27,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1367723012, now seen corresponding path program 1 times [2020-11-29 19:45:27,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:27,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513068978] [2020-11-29 19:45:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:27,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513068978] [2020-11-29 19:45:27,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476862122] [2020-11-29 19:45:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 19:45:27,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:28,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:28,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 15 [2020-11-29 19:45:28,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001208708] [2020-11-29 19:45:28,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 19:45:28,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:28,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 19:45:28,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:45:28,251 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 15 states. [2020-11-29 19:45:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:44,057 INFO L93 Difference]: Finished difference Result 84 states and 116 transitions. [2020-11-29 19:45:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 19:45:44,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-11-29 19:45:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:44,066 INFO L225 Difference]: With dead ends: 84 [2020-11-29 19:45:44,066 INFO L226 Difference]: Without dead ends: 72 [2020-11-29 19:45:44,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:45:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-29 19:45:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-11-29 19:45:44,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 19:45:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2020-11-29 19:45:44,084 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 34 [2020-11-29 19:45:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:44,085 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-11-29 19:45:44,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 19:45:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2020-11-29 19:45:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 19:45:44,087 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:44,087 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:44,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 19:45:44,297 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash 755607973, now seen corresponding path program 1 times [2020-11-29 19:45:44,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:44,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383079389] [2020-11-29 19:45:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:44,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383079389] [2020-11-29 19:45:44,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20125050] [2020-11-29 19:45:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:44,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 19:45:44,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:45,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:45:45,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:45:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:45,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:45,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-29 19:45:45,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304032368] [2020-11-29 19:45:45,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 19:45:45,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 19:45:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:45:45,304 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand 18 states. [2020-11-29 19:45:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:46,146 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2020-11-29 19:45:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:45:46,153 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-11-29 19:45:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:46,155 INFO L225 Difference]: With dead ends: 80 [2020-11-29 19:45:46,155 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 19:45:46,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:45:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 19:45:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-11-29 19:45:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 19:45:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2020-11-29 19:45:46,168 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 37 [2020-11-29 19:45:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:46,168 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2020-11-29 19:45:46,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 19:45:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2020-11-29 19:45:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 19:45:46,170 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:46,171 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:46,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:45:46,394 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:46,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash -523382440, now seen corresponding path program 2 times [2020-11-29 19:45:46,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:46,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951255692] [2020-11-29 19:45:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:46,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951255692] [2020-11-29 19:45:46,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538925687] [2020-11-29 19:45:46,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:46,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:45:46,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:45:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:45:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:46,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:46,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 19:45:46,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124010913] [2020-11-29 19:45:46,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:45:46,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:46,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:45:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:45:46,744 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand 8 states. [2020-11-29 19:45:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:47,167 INFO L93 Difference]: Finished difference Result 131 states and 189 transitions. [2020-11-29 19:45:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:45:47,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-11-29 19:45:47,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:47,169 INFO L225 Difference]: With dead ends: 131 [2020-11-29 19:45:47,169 INFO L226 Difference]: Without dead ends: 99 [2020-11-29 19:45:47,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:45:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-29 19:45:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2020-11-29 19:45:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-29 19:45:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-11-29 19:45:47,192 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 41 [2020-11-29 19:45:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:47,193 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-11-29 19:45:47,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:45:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-11-29 19:45:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 19:45:47,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:47,204 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:47,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:45:47,418 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:47,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:47,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1208146702, now seen corresponding path program 1 times [2020-11-29 19:45:47,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:47,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208379617] [2020-11-29 19:45:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:48,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208379617] [2020-11-29 19:45:48,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681737193] [2020-11-29 19:45:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:48,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-29 19:45:48,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:48,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:45:48,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:45:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:48,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:48,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-29 19:45:48,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122946063] [2020-11-29 19:45:48,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 19:45:48,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:48,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 19:45:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:45:48,719 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 22 states. [2020-11-29 19:45:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:50,025 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2020-11-29 19:45:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 19:45:50,027 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-11-29 19:45:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:50,029 INFO L225 Difference]: With dead ends: 104 [2020-11-29 19:45:50,029 INFO L226 Difference]: Without dead ends: 102 [2020-11-29 19:45:50,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-11-29 19:45:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-29 19:45:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2020-11-29 19:45:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 19:45:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2020-11-29 19:45:50,053 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 45 [2020-11-29 19:45:50,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:50,054 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2020-11-29 19:45:50,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 19:45:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2020-11-29 19:45:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-29 19:45:50,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:50,055 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:50,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 19:45:50,282 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1648727767, now seen corresponding path program 1 times [2020-11-29 19:45:50,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:50,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918384645] [2020-11-29 19:45:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:50,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918384645] [2020-11-29 19:45:50,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492667229] [2020-11-29 19:45:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:51,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-29 19:45:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:52,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:52,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 23 [2020-11-29 19:45:52,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184278942] [2020-11-29 19:45:52,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 19:45:52,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:52,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 19:45:52,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:45:52,075 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 23 states. [2020-11-29 19:45:52,616 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-11-29 19:45:52,944 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-11-29 19:45:53,123 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-11-29 19:45:53,460 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-11-29 19:45:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:54,824 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2020-11-29 19:45:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:45:54,826 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-11-29 19:45:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:54,827 INFO L225 Difference]: With dead ends: 130 [2020-11-29 19:45:54,827 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 19:45:54,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 19:45:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 19:45:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-11-29 19:45:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-29 19:45:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2020-11-29 19:45:54,850 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 50 [2020-11-29 19:45:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:54,852 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2020-11-29 19:45:54,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 19:45:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2020-11-29 19:45:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 19:45:54,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:54,857 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:55,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:45:55,081 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash -379265710, now seen corresponding path program 1 times [2020-11-29 19:45:55,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:55,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280059164] [2020-11-29 19:45:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:55,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280059164] [2020-11-29 19:45:55,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823636995] [2020-11-29 19:45:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:55,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-29 19:45:55,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:56,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:45:56,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:45:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:56,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:56,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-11-29 19:45:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670785600] [2020-11-29 19:45:56,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 19:45:56,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 19:45:56,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-11-29 19:45:56,528 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 26 states. [2020-11-29 19:45:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:58,133 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2020-11-29 19:45:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:45:58,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-11-29 19:45:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:58,135 INFO L225 Difference]: With dead ends: 95 [2020-11-29 19:45:58,136 INFO L226 Difference]: Without dead ends: 93 [2020-11-29 19:45:58,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 19:45:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-29 19:45:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-11-29 19:45:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 19:45:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-11-29 19:45:58,145 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 52 [2020-11-29 19:45:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:58,146 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-11-29 19:45:58,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 19:45:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2020-11-29 19:45:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-29 19:45:58,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:58,147 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:58,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:45:58,366 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash -807573883, now seen corresponding path program 2 times [2020-11-29 19:45:58,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:58,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277178983] [2020-11-29 19:45:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:45:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:58,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277178983] [2020-11-29 19:45:58,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985904528] [2020-11-29 19:45:58,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:45:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:45:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:45:58,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:45:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:45:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:45:58,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:45:58,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 19:45:58,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165488631] [2020-11-29 19:45:58,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:45:58,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:45:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:45:58,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:45:58,802 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 10 states. [2020-11-29 19:45:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:45:59,288 INFO L93 Difference]: Finished difference Result 128 states and 173 transitions. [2020-11-29 19:45:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:45:59,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-11-29 19:45:59,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:45:59,290 INFO L225 Difference]: With dead ends: 128 [2020-11-29 19:45:59,290 INFO L226 Difference]: Without dead ends: 95 [2020-11-29 19:45:59,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:45:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-29 19:45:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-11-29 19:45:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 19:45:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2020-11-29 19:45:59,299 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 56 [2020-11-29 19:45:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:45:59,299 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2020-11-29 19:45:59,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:45:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2020-11-29 19:45:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-29 19:45:59,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:45:59,300 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:45:59,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 19:45:59,532 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:45:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:45:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1342094880, now seen corresponding path program 1 times [2020-11-29 19:45:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:45:59,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195676096] [2020-11-29 19:45:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:45:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:46:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:46:00,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195676096] [2020-11-29 19:46:00,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346117173] [2020-11-29 19:46:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:46:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:46:00,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 49 conjunts are in the unsatisfiable core [2020-11-29 19:46:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:46:01,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:46:01,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:46:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:46:01,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:46:01,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2020-11-29 19:46:01,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625268695] [2020-11-29 19:46:01,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 19:46:01,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:46:01,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 19:46:01,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-11-29 19:46:01,322 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand 30 states. [2020-11-29 19:46:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:46:02,577 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2020-11-29 19:46:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 19:46:02,578 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-11-29 19:46:02,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:46:02,580 INFO L225 Difference]: With dead ends: 95 [2020-11-29 19:46:02,580 INFO L226 Difference]: Without dead ends: 93 [2020-11-29 19:46:02,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 19:46:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-29 19:46:02,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-11-29 19:46:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 19:46:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2020-11-29 19:46:02,598 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 58 [2020-11-29 19:46:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:46:02,598 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2020-11-29 19:46:02,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 19:46:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2020-11-29 19:46:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-29 19:46:02,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:46:02,601 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:46:02,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 19:46:02,806 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:46:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:46:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1711878395, now seen corresponding path program 1 times [2020-11-29 19:46:02,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:46:02,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379159402] [2020-11-29 19:46:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:46:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:46:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:46:03,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379159402] [2020-11-29 19:46:03,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218795472] [2020-11-29 19:46:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:46:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:46:03,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 53 conjunts are in the unsatisfiable core [2020-11-29 19:46:03,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:46:04,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:46:04,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:46:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:46:04,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:46:04,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2020-11-29 19:46:04,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591405761] [2020-11-29 19:46:04,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-29 19:46:04,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:46:04,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-29 19:46:04,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 19:46:04,780 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand 34 states. [2020-11-29 19:46:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:46:06,680 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2020-11-29 19:46:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 19:46:06,680 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 63 [2020-11-29 19:46:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:46:06,681 INFO L225 Difference]: With dead ends: 106 [2020-11-29 19:46:06,681 INFO L226 Difference]: Without dead ends: 104 [2020-11-29 19:46:06,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2020-11-29 19:46:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-29 19:46:06,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-11-29 19:46:06,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 19:46:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2020-11-29 19:46:06,691 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 63 [2020-11-29 19:46:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:46:06,691 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2020-11-29 19:46:06,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-29 19:46:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2020-11-29 19:46:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-29 19:46:06,692 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:46:06,693 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:46:06,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 19:46:06,918 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:46:06,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:46:06,919 INFO L82 PathProgramCache]: Analyzing trace with hash 501827256, now seen corresponding path program 2 times [2020-11-29 19:46:06,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:46:06,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471071113] [2020-11-29 19:46:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:46:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:46:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:46:07,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471071113] [2020-11-29 19:46:07,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084427995] [2020-11-29 19:46:07,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/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 19:46:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:46:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:46:07,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 57 conjunts are in the unsatisfiable core [2020-11-29 19:46:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:46:08,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:46:08,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:46:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:46:08,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:46:08,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 37 [2020-11-29 19:46:08,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671595320] [2020-11-29 19:46:08,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-29 19:46:08,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:46:08,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-29 19:46:08,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 19:46:08,883 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand 37 states. [2020-11-29 19:46:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:46:10,801 INFO L93 Difference]: Finished difference Result 127 states and 169 transitions. [2020-11-29 19:46:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 19:46:10,801 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 67 [2020-11-29 19:46:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:46:10,802 INFO L225 Difference]: With dead ends: 127 [2020-11-29 19:46:10,802 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:46:10,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=372, Invalid=2598, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 19:46:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:46:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:46:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:46:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:46:10,805 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-11-29 19:46:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:46:10,805 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:46:10,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-29 19:46:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:46:10,805 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:46:11,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:46:11,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 19:46:11,536 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 40 [2020-11-29 19:46:11,539 INFO L274 CegarLoopResult]: For program point L35-2(lines 23 38) no Hoare annotation was computed. [2020-11-29 19:46:11,539 INFO L274 CegarLoopResult]: For program point L31(lines 31 38) no Hoare annotation was computed. [2020-11-29 19:46:11,539 INFO L274 CegarLoopResult]: For program point L27(lines 27 38) no Hoare annotation was computed. [2020-11-29 19:46:11,539 INFO L274 CegarLoopResult]: For program point L23(lines 23 38) no Hoare annotation was computed. [2020-11-29 19:46:11,540 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 19:46:11,540 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 19:46:11,540 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 19:46:11,540 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 19:46:11,540 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 19:46:11,540 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-11-29 19:46:11,541 INFO L274 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-11-29 19:46:11,541 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 19:46:11,541 INFO L274 CegarLoopResult]: For program point L29(lines 29 38) no Hoare annotation was computed. [2020-11-29 19:46:11,541 INFO L274 CegarLoopResult]: For program point L25(lines 25 38) no Hoare annotation was computed. [2020-11-29 19:46:11,541 INFO L274 CegarLoopResult]: For program point L21-2(lines 21 41) no Hoare annotation was computed. [2020-11-29 19:46:11,542 INFO L270 CegarLoopResult]: At program point L42(lines 16 43) the Hoare annotation is: (or (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (and (= ULTIMATE.start_main_~v4~0 0) (= ULTIMATE.start_main_~i~0 0) (= ULTIMATE.start_main_~v1~0 0) (= ULTIMATE.start_main_~k~0 0) (= ULTIMATE.start_main_~v5~0 0) (= ULTIMATE.start_main_~j~0 0) (= ULTIMATE.start_main_~l~0 0) (= ULTIMATE.start_main_~v2~0 0) (= ULTIMATE.start_main_~v3~0 0))) [2020-11-29 19:46:11,542 INFO L274 CegarLoopResult]: For program point L9(lines 9 11) no Hoare annotation was computed. [2020-11-29 19:46:11,542 INFO L270 CegarLoopResult]: At program point L9-2(lines 8 41) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div ~SIZE~0 4294967296) 1))) (.cse1 (<= ~SIZE~0 20000001))) (or (and (= ULTIMATE.start_main_~v4~0 0) .cse0 (= ULTIMATE.start_main_~i~0 0) (= ULTIMATE.start_main_~v1~0 0) (= ULTIMATE.start_main_~k~0 0) (= ULTIMATE.start_main_~v5~0 0) (<= ULTIMATE.start_main_~n~0 (+ (* 4294967296 (div ULTIMATE.start_main_~n~0 4294967296)) 20000001)) (= ULTIMATE.start_main_~j~0 0) (= ULTIMATE.start_main_~l~0 0) (= ULTIMATE.start_main_~v2~0 0) (= ULTIMATE.start_main_~v3~0 0) .cse1) (let ((.cse2 (+ ULTIMATE.start_main_~v1~0 ULTIMATE.start_main_~v2~0 ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~v3~0 ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~v4~0 ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~v5~0))) (and .cse0 (<= ULTIMATE.start_main_~l~0 .cse2) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= .cse2 ULTIMATE.start_main_~l~0) .cse1)))) [2020-11-29 19:46:11,542 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-11-29 19:46:11,542 INFO L274 CegarLoopResult]: For program point L35(lines 35 38) no Hoare annotation was computed. [2020-11-29 19:46:11,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:46:11 BoogieIcfgContainer [2020-11-29 19:46:11,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:46:11,585 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:46:11,586 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:46:11,587 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:46:11,587 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:45:18" (3/4) ... [2020-11-29 19:46:11,591 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:46:11,606 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-29 19:46:11,606 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 19:46:11,607 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:46:11,607 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:46:11,669 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9fb92f10-6b0d-4297-a877-c5d67a9414e4/bin/uautomizer/witness.graphml [2020-11-29 19:46:11,670 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:46:11,671 INFO L168 Benchmark]: Toolchain (without parser) took 54333.56 ms. Allocated memory was 86.0 MB in the beginning and 182.5 MB in the end (delta: 96.5 MB). Free memory was 50.8 MB in the beginning and 51.9 MB in the end (delta: -1.1 MB). Peak memory consumption was 94.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:46:11,672 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 86.0 MB. Free memory was 55.8 MB in the beginning and 55.8 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:46:11,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.22 ms. Allocated memory is still 86.0 MB. Free memory was 50.7 MB in the beginning and 62.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:46:11,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.10 ms. Allocated memory is still 86.0 MB. Free memory was 61.8 MB in the beginning and 60.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:46:11,673 INFO L168 Benchmark]: Boogie Preprocessor took 58.82 ms. Allocated memory is still 86.0 MB. Free memory was 60.3 MB in the beginning and 59.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:46:11,673 INFO L168 Benchmark]: RCFGBuilder took 441.09 ms. Allocated memory is still 86.0 MB. Free memory was 59.1 MB in the beginning and 45.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:46:11,674 INFO L168 Benchmark]: TraceAbstraction took 53270.68 ms. Allocated memory was 86.0 MB in the beginning and 182.5 MB in the end (delta: 96.5 MB). Free memory was 44.8 MB in the beginning and 55.0 MB in the end (delta: -10.3 MB). Peak memory consumption was 88.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:46:11,674 INFO L168 Benchmark]: Witness Printer took 84.78 ms. Allocated memory is still 182.5 MB. Free memory was 55.0 MB in the beginning and 51.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:46:11,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 86.0 MB. Free memory was 55.8 MB in the beginning and 55.8 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 383.22 ms. Allocated memory is still 86.0 MB. Free memory was 50.7 MB in the beginning and 62.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 86.10 ms. Allocated memory is still 86.0 MB. Free memory was 61.8 MB in the beginning and 60.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.82 ms. Allocated memory is still 86.0 MB. Free memory was 60.3 MB in the beginning and 59.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 441.09 ms. Allocated memory is still 86.0 MB. Free memory was 59.1 MB in the beginning and 45.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 53270.68 ms. Allocated memory was 86.0 MB in the beginning and 182.5 MB in the end (delta: 96.5 MB). Free memory was 44.8 MB in the beginning and 55.0 MB in the end (delta: -10.3 MB). Peak memory consumption was 88.9 MB. Max. memory is 16.1 GB. * Witness Printer took 84.78 ms. Allocated memory is still 182.5 MB. Free memory was 55.0 MB in the beginning and 51.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 16]: Loop Invariant Derived loop invariant: !(0 == cond) || ((((((((v4 == 0 && i == 0) && v1 == 0) && k == 0) && v5 == 0) && j == 0) && l == 0) && v2 == 0) && v3 == 0) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: (((((((((((v4 == 0 && 0 < SIZE / 4294967296 + 1) && i == 0) && v1 == 0) && k == 0) && v5 == 0) && n <= 4294967296 * (n / 4294967296) + 20000001) && j == 0) && l == 0) && v2 == 0) && v3 == 0) && SIZE <= 20000001) || ((((0 < SIZE / 4294967296 + 1 && l <= v1 + v2 + i + v3 + k + v4 + j + v5) && 1 <= cond) && v1 + v2 + i + v3 + k + v4 + j + v5 <= l) && SIZE <= 20000001) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 52.5s, OverallIterations: 15, TraceHistogramMax: 9, AutomataDifference: 32.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 1110 SDslu, 846 SDs, 0 SdLazy, 8054 SolverSat, 265 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 23.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 828 GetRequests, 479 SyntacticMatches, 11 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=14, 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, 15 MinimizatonAttempts, 90 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 16 NumberOfFragments, 117 HoareAnnotationTreeSize, 2 FomulaSimplifications, 588 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 732 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 1176 NumberOfCodeBlocks, 1176 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1147 ConstructedInterpolants, 0 QuantifiedInterpolants, 1239451 SizeOfPredicates, 127 NumberOfNonLiveVariables, 1895 ConjunctsInSsa, 488 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 69/2110 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...