./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.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_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 029d85df21dda5501a92813bcb1234093dd4e34e ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:03:01,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:03:01,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:03:01,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:03:01,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:03:01,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:03:01,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:03:01,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:03:01,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:03:01,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:03:01,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:03:01,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:03:01,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:03:01,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:03:01,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:03:01,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:03:01,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:03:01,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:03:01,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:03:01,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:03:01,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:03:01,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:03:01,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:03:01,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:03:01,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:03:01,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:03:01,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:03:01,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:03:01,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:03:01,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:03:01,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:03:01,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:03:01,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:03:01,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:03:01,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:03:01,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:03:01,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:03:01,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:03:01,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:03:01,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:03:01,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:03:01,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:03:01,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:03:01,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:03:01,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:03:01,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:03:01,809 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:03:01,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:03:01,810 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:03:01,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:03:01,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:03:01,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:03:01,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:03:01,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:03:01,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:03:01,812 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:03:01,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:03:01,813 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:03:01,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:03:01,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:03:01,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:03:01,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:03:01,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:03:01,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:03:01,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:03:01,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:03:01,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:03:01,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:03:01,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:03:01,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:03:01,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:03:01,816 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_ae854240-9fb0-4a7e-830f-b8db97026541/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 029d85df21dda5501a92813bcb1234093dd4e34e [2020-11-30 01:03:02,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:03:02,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:03:02,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:03:02,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:03:02,125 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:03:02,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2020-11-30 01:03:02,205 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/data/7179cf497/d5e44f4b5a1149c8b2238a99e0391010/FLAGec79be097 [2020-11-30 01:03:02,665 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:03:02,665 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2020-11-30 01:03:02,682 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/data/7179cf497/d5e44f4b5a1149c8b2238a99e0391010/FLAGec79be097 [2020-11-30 01:03:03,042 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/data/7179cf497/d5e44f4b5a1149c8b2238a99e0391010 [2020-11-30 01:03:03,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:03:03,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:03:03,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:03:03,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:03:03,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:03:03,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@755058d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03, skipping insertion in model container [2020-11-30 01:03:03,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:03:03,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:03:03,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:03:03,330 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:03:03,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:03:03,362 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:03:03,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03 WrapperNode [2020-11-30 01:03:03,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:03:03,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:03:03,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:03:03,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:03:03,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:03:03,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:03:03,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:03:03,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:03:03,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... [2020-11-30 01:03:03,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:03:03,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:03:03,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:03:03,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:03:03,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:03,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:03:03,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:03:03,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:03:03,547 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-30 01:03:03,547 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-30 01:03:03,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:03:03,833 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:03:03,833 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 01:03:03,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:03:03 BoogieIcfgContainer [2020-11-30 01:03:03,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:03:03,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:03:03,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:03:03,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:03:03,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:03:03" (1/3) ... [2020-11-30 01:03:03,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c5b727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:03:03, skipping insertion in model container [2020-11-30 01:03:03,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:03:03" (2/3) ... [2020-11-30 01:03:03,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c5b727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:03:03, skipping insertion in model container [2020-11-30 01:03:03,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:03:03" (3/3) ... [2020-11-30 01:03:03,852 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-11-30 01:03:03,864 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:03:03,868 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:03:03,880 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:03:03,908 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:03:03,908 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:03:03,909 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:03:03,909 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:03:03,909 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:03:03,909 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:03:03,909 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:03:03,909 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:03:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-30 01:03:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:03:03,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:03,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:03,932 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-30 01:03:03,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:03,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326351166] [2020-11-30 01:03:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:04,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:03:04,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326351166] [2020-11-30 01:03:04,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:03:04,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:03:04,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093303099] [2020-11-30 01:03:04,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:03:04,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:04,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:03:04,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:03:04,326 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-30 01:03:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:04,403 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-30 01:03:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:03:04,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 01:03:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:04,414 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:03:04,414 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 01:03:04,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:03:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 01:03:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-30 01:03:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 01:03:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-30 01:03:04,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-30 01:03:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:04,475 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-30 01:03:04,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:03:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-30 01:03:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:03:04,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:04,478 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:04,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:03:04,479 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-30 01:03:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:04,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238701777] [2020-11-30 01:03:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:04,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:04,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:03:04,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238701777] [2020-11-30 01:03:04,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597695053] [2020-11-30 01:03:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:04,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:03:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:03:04,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:04,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-11-30 01:03:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349287256] [2020-11-30 01:03:04,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:03:04,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:04,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:03:04,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:03:04,837 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2020-11-30 01:03:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:04,938 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-30 01:03:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:03:04,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-11-30 01:03:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:04,940 INFO L225 Difference]: With dead ends: 22 [2020-11-30 01:03:04,941 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 01:03:04,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:03:04,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 01:03:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 01:03:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 01:03:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-30 01:03:04,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-30 01:03:04,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:04,948 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-30 01:03:04,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:03:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-30 01:03:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:03:04,950 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:04,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:05,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 01:03:05,151 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-30 01:03:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:05,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221052703] [2020-11-30 01:03:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:05,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:05,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:05,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 01:03:05,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221052703] [2020-11-30 01:03:05,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068932240] [2020-11-30 01:03:05,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:05,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:03:05,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:05,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:03:05,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 01:03:05,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:05,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-11-30 01:03:05,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049674001] [2020-11-30 01:03:05,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:03:05,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:03:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:03:05,505 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-11-30 01:03:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:05,635 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-30 01:03:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:03:05,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-11-30 01:03:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:05,637 INFO L225 Difference]: With dead ends: 25 [2020-11-30 01:03:05,637 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 01:03:05,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:03:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 01:03:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 01:03:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 01:03:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-30 01:03:05,644 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-11-30 01:03:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:05,645 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-30 01:03:05,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:03:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-30 01:03:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 01:03:05,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:05,646 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:05,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:05,873 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:05,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-11-30 01:03:05,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:05,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294249797] [2020-11-30 01:03:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:05,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:05,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:06,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:06,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 01:03:06,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294249797] [2020-11-30 01:03:06,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046417076] [2020-11-30 01:03:06,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:06,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 01:03:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:03:06,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 01:03:06,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:06,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-11-30 01:03:06,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681862086] [2020-11-30 01:03:06,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:03:06,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:03:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:03:06,272 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-11-30 01:03:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:06,400 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-30 01:03:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:03:06,402 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-11-30 01:03:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:06,404 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:03:06,404 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 01:03:06,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:03:06,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 01:03:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 01:03:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:03:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-30 01:03:06,415 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-11-30 01:03:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:06,415 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-30 01:03:06,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:03:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-30 01:03:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-30 01:03:06,419 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:06,420 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:06,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:06,639 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:06,640 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-11-30 01:03:06,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:06,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816984224] [2020-11-30 01:03:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:06,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:06,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:06,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:06,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:06,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-30 01:03:06,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816984224] [2020-11-30 01:03:06,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952362253] [2020-11-30 01:03:06,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:06,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:03:06,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:03:06,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-30 01:03:07,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:07,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-11-30 01:03:07,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462305698] [2020-11-30 01:03:07,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:03:07,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:07,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:03:07,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:03:07,065 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2020-11-30 01:03:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:07,228 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-30 01:03:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:03:07,230 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-11-30 01:03:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:07,232 INFO L225 Difference]: With dead ends: 31 [2020-11-30 01:03:07,232 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:03:07,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:03:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:03:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:03:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:03:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-30 01:03:07,243 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-11-30 01:03:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:07,244 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-30 01:03:07,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:03:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-30 01:03:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-30 01:03:07,245 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:07,245 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:07,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:07,446 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:07,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:07,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-11-30 01:03:07,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:07,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372152904] [2020-11-30 01:03:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:07,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:07,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:07,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:07,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:07,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:07,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 01:03:07,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372152904] [2020-11-30 01:03:07,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843986617] [2020-11-30 01:03:07,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:07,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-30 01:03:07,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:07,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 01:03:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 01:03:07,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:07,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-11-30 01:03:07,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671948581] [2020-11-30 01:03:07,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:03:07,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:03:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:03:07,859 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-11-30 01:03:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:07,983 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-30 01:03:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:03:07,984 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-11-30 01:03:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:07,985 INFO L225 Difference]: With dead ends: 34 [2020-11-30 01:03:07,985 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 01:03:07,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:03:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 01:03:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-30 01:03:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 01:03:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-30 01:03:07,992 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-11-30 01:03:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:07,992 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-30 01:03:07,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:03:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-30 01:03:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-30 01:03:07,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:07,994 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:08,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 01:03:08,201 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:08,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-11-30 01:03:08,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:08,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025656834] [2020-11-30 01:03:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:08,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:08,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:08,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:08,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:08,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:08,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:08,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-30 01:03:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025656834] [2020-11-30 01:03:08,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167967853] [2020-11-30 01:03:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:08,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-30 01:03:08,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:08,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 01:03:08,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-30 01:03:08,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:08,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2020-11-30 01:03:08,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278126184] [2020-11-30 01:03:08,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:03:08,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:08,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:03:08,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:03:08,670 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 14 states. [2020-11-30 01:03:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:08,821 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-30 01:03:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:03:08,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-11-30 01:03:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:08,823 INFO L225 Difference]: With dead ends: 37 [2020-11-30 01:03:08,824 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:03:08,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:03:08,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:03:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-30 01:03:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 01:03:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-30 01:03:08,836 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-11-30 01:03:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:08,836 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-30 01:03:08,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:03:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-30 01:03:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-30 01:03:08,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:08,838 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:09,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:09,053 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:09,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-11-30 01:03:09,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:09,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488726422] [2020-11-30 01:03:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-30 01:03:09,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488726422] [2020-11-30 01:03:09,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764870804] [2020-11-30 01:03:09,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 01:03:09,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-30 01:03:09,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:09,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2020-11-30 01:03:09,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923513330] [2020-11-30 01:03:09,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 01:03:09,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:09,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 01:03:09,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:03:09,540 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 15 states. [2020-11-30 01:03:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:09,718 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-30 01:03:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:03:09,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-11-30 01:03:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:09,721 INFO L225 Difference]: With dead ends: 40 [2020-11-30 01:03:09,721 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 01:03:09,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-11-30 01:03:09,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 01:03:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-30 01:03:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 01:03:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-30 01:03:09,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-11-30 01:03:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:09,731 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-30 01:03:09,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 01:03:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-30 01:03:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-30 01:03:09,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:09,733 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:09,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:09,942 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:09,942 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-11-30 01:03:09,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:09,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339260913] [2020-11-30 01:03:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:09,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:03:10,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339260913] [2020-11-30 01:03:10,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431542402] [2020-11-30 01:03:10,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:10,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:03:10,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:10,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 01:03:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:03:10,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:10,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2020-11-30 01:03:10,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140823026] [2020-11-30 01:03:10,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 01:03:10,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:10,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 01:03:10,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:03:10,497 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2020-11-30 01:03:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:10,690 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-30 01:03:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:03:10,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-11-30 01:03:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:10,692 INFO L225 Difference]: With dead ends: 43 [2020-11-30 01:03:10,692 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 01:03:10,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-11-30 01:03:10,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 01:03:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-30 01:03:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-30 01:03:10,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-11-30 01:03:10,703 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-11-30 01:03:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:10,703 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-11-30 01:03:10,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 01:03:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-11-30 01:03:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-30 01:03:10,705 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:10,705 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:10,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-30 01:03:10,933 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-11-30 01:03:10,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:10,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967375048] [2020-11-30 01:03:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:10,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-30 01:03:11,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967375048] [2020-11-30 01:03:11,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117692966] [2020-11-30 01:03:11,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:11,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-30 01:03:11,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 01:03:11,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-30 01:03:11,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:11,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-11-30 01:03:11,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247783767] [2020-11-30 01:03:11,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 01:03:11,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:11,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 01:03:11,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:03:11,508 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 17 states. [2020-11-30 01:03:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:11,724 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-30 01:03:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:03:11,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-11-30 01:03:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:11,726 INFO L225 Difference]: With dead ends: 46 [2020-11-30 01:03:11,726 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 01:03:11,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2020-11-30 01:03:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 01:03:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-30 01:03:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-30 01:03:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-30 01:03:11,742 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-11-30 01:03:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:11,743 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-30 01:03:11,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 01:03:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-30 01:03:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-30 01:03:11,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:11,748 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:11,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:11,969 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:11,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:11,970 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-11-30 01:03:11,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:11,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306153480] [2020-11-30 01:03:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-30 01:03:12,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306153480] [2020-11-30 01:03:12,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56512228] [2020-11-30 01:03:12,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:12,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:03:12,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:12,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 01:03:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-30 01:03:12,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:12,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2020-11-30 01:03:12,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111555071] [2020-11-30 01:03:12,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:03:12,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:12,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:03:12,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:03:12,565 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 18 states. [2020-11-30 01:03:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:12,805 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-30 01:03:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 01:03:12,806 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-11-30 01:03:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:12,807 INFO L225 Difference]: With dead ends: 49 [2020-11-30 01:03:12,807 INFO L226 Difference]: Without dead ends: 45 [2020-11-30 01:03:12,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-11-30 01:03:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-30 01:03:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-30 01:03:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:03:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-11-30 01:03:12,815 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-11-30 01:03:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:12,815 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-11-30 01:03:12,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:03:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-11-30 01:03:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-30 01:03:12,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:12,817 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:13,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:13,041 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-11-30 01:03:13,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:13,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293580189] [2020-11-30 01:03:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-30 01:03:13,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293580189] [2020-11-30 01:03:13,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272298727] [2020-11-30 01:03:13,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:13,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-30 01:03:13,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:13,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-30 01:03:13,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-30 01:03:13,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:13,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-11-30 01:03:13,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622031872] [2020-11-30 01:03:13,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-30 01:03:13,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:13,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-30 01:03:13,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:03:13,698 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-11-30 01:03:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:14,002 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-11-30 01:03:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 01:03:14,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-11-30 01:03:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:14,005 INFO L225 Difference]: With dead ends: 52 [2020-11-30 01:03:14,005 INFO L226 Difference]: Without dead ends: 48 [2020-11-30 01:03:14,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=622, Unknown=0, NotChecked=0, Total=930 [2020-11-30 01:03:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-30 01:03:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-30 01:03:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 01:03:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-30 01:03:14,015 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-11-30 01:03:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:14,015 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-30 01:03:14,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-30 01:03:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-30 01:03:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-30 01:03:14,023 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:14,023 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:14,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 01:03:14,245 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-11-30 01:03:14,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:14,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711135092] [2020-11-30 01:03:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-30 01:03:14,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711135092] [2020-11-30 01:03:14,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283240448] [2020-11-30 01:03:14,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:14,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-30 01:03:14,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:14,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-30 01:03:14,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-30 01:03:15,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:15,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2020-11-30 01:03:15,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280493220] [2020-11-30 01:03:15,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 01:03:15,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:15,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 01:03:15,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:03:15,075 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 20 states. [2020-11-30 01:03:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:15,338 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-30 01:03:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 01:03:15,339 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 82 [2020-11-30 01:03:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:15,340 INFO L225 Difference]: With dead ends: 55 [2020-11-30 01:03:15,340 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 01:03:15,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-11-30 01:03:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 01:03:15,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-30 01:03:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-30 01:03:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-11-30 01:03:15,357 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-11-30 01:03:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:15,357 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-11-30 01:03:15,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 01:03:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-11-30 01:03:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-30 01:03:15,359 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:15,359 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:15,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-30 01:03:15,560 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:15,560 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-11-30 01:03:15,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:15,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205469179] [2020-11-30 01:03:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:15,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:16,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-30 01:03:16,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205469179] [2020-11-30 01:03:16,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918372458] [2020-11-30 01:03:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:03:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-30 01:03:16,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:16,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2020-11-30 01:03:16,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673375082] [2020-11-30 01:03:16,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 01:03:16,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 01:03:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:03:16,308 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-11-30 01:03:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:16,578 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-30 01:03:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 01:03:16,578 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 88 [2020-11-30 01:03:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:16,580 INFO L225 Difference]: With dead ends: 58 [2020-11-30 01:03:16,580 INFO L226 Difference]: Without dead ends: 54 [2020-11-30 01:03:16,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 01:03:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-30 01:03:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-30 01:03:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-30 01:03:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-11-30 01:03:16,595 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-11-30 01:03:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:16,596 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-11-30 01:03:16,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 01:03:16,596 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-11-30 01:03:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-30 01:03:16,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:16,599 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:16,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-30 01:03:16,817 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-11-30 01:03:16,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:16,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567565768] [2020-11-30 01:03:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:16,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:16,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:16,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:16,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:16,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-30 01:03:17,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567565768] [2020-11-30 01:03:17,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875204905] [2020-11-30 01:03:17,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/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 [2020-11-30 01:03:17,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:03:17,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:17,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-30 01:03:17,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-30 01:03:17,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:17,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2020-11-30 01:03:17,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222221608] [2020-11-30 01:03:17,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-30 01:03:17,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:17,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-30 01:03:17,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:03:17,562 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 22 states. [2020-11-30 01:03:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:17,875 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-11-30 01:03:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-30 01:03:17,875 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 94 [2020-11-30 01:03:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:17,876 INFO L225 Difference]: With dead ends: 61 [2020-11-30 01:03:17,876 INFO L226 Difference]: Without dead ends: 57 [2020-11-30 01:03:17,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2020-11-30 01:03:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-30 01:03:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-30 01:03:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-30 01:03:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-11-30 01:03:17,897 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-11-30 01:03:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:17,897 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-11-30 01:03:17,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-30 01:03:17,898 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-11-30 01:03:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-30 01:03:17,901 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:17,901 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:18,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:18,102 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:18,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:18,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-11-30 01:03:18,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:18,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195912667] [2020-11-30 01:03:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:18,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:19,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:19,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:19,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:19,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:19,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:19,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-30 01:03:19,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195912667] [2020-11-30 01:03:19,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332885947] [2020-11-30 01:03:19,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:19,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-30 01:03:19,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:19,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 67 conjunts are in the unsatisfiable core [2020-11-30 01:03:19,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-30 01:03:19,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:03:19,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-11-30 01:03:19,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981103496] [2020-11-30 01:03:19,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-30 01:03:19,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-30 01:03:19,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 01:03:19,849 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 35 states. [2020-11-30 01:03:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:20,477 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-11-30 01:03:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-30 01:03:20,478 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2020-11-30 01:03:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:20,479 INFO L225 Difference]: With dead ends: 64 [2020-11-30 01:03:20,479 INFO L226 Difference]: Without dead ends: 60 [2020-11-30 01:03:20,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 01:03:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-30 01:03:20,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-30 01:03:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-30 01:03:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-11-30 01:03:20,490 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-11-30 01:03:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:20,491 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-11-30 01:03:20,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-30 01:03:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-11-30 01:03:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-30 01:03:20,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:03:20,494 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:03:20,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-30 01:03:20,708 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:03:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:03:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash 35426954, now seen corresponding path program 16 times [2020-11-30 01:03:20,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:03:20,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869055926] [2020-11-30 01:03:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:03:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:20,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:20,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:20,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:20,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:20,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:20,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:03:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:03:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-30 01:03:21,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869055926] [2020-11-30 01:03:21,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557208414] [2020-11-30 01:03:21,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:03:21,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:03:21,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:03:21,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-30 01:03:21,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:03:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-30 01:03:21,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:03:21,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 24 [2020-11-30 01:03:21,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295652896] [2020-11-30 01:03:21,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 01:03:21,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:03:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 01:03:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-11-30 01:03:21,667 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-11-30 01:03:22,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:03:22,100 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-11-30 01:03:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-30 01:03:22,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-11-30 01:03:22,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:03:22,101 INFO L225 Difference]: With dead ends: 60 [2020-11-30 01:03:22,101 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:03:22,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 01:03:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:03:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:03:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:03:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:03:22,102 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2020-11-30 01:03:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:03:22,102 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:03:22,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 01:03:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:03:22,103 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:03:22,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-30 01:03:22,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:03:22,322 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:03:22,322 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 01:03:22,322 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:03:22,322 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 01:03:22,322 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 01:03:22,322 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-30 01:03:22,322 INFO L274 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-11-30 01:03:22,323 INFO L270 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (= 15 ULTIMATE.start_main_~input~0) [2020-11-30 01:03:22,323 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-11-30 01:03:22,323 INFO L274 CegarLoopResult]: For program point L11(lines 11 17) no Hoare annotation was computed. [2020-11-30 01:03:22,323 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-30 01:03:22,323 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-11-30 01:03:22,323 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-11-30 01:03:22,323 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-11-30 01:03:22,323 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-11-30 01:03:22,323 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-30 01:03:22,323 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-11-30 01:03:22,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:03:22 BoogieIcfgContainer [2020-11-30 01:03:22,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:03:22,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:03:22,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:03:22,327 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:03:22,328 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:03:03" (3/4) ... [2020-11-30 01:03:22,331 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:03:22,337 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-30 01:03:22,340 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-30 01:03:22,340 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 01:03:22,340 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:03:22,340 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:03:22,368 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ae854240-9fb0-4a7e-830f-b8db97026541/bin/uautomizer/witness.graphml [2020-11-30 01:03:22,368 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:03:22,370 INFO L168 Benchmark]: Toolchain (without parser) took 19323.83 ms. Allocated memory was 121.6 MB in the beginning and 308.3 MB in the end (delta: 186.6 MB). Free memory was 93.6 MB in the beginning and 257.2 MB in the end (delta: -163.6 MB). Peak memory consumption was 21.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:03:22,371 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 59.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:03:22,371 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.66 ms. Allocated memory is still 121.6 MB. Free memory was 93.6 MB in the beginning and 99.2 MB in the end (delta: -5.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:03:22,371 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.08 ms. Allocated memory is still 121.6 MB. Free memory was 99.2 MB in the beginning and 97.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:03:22,372 INFO L168 Benchmark]: Boogie Preprocessor took 34.62 ms. Allocated memory is still 121.6 MB. Free memory was 97.8 MB in the beginning and 96.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:03:22,372 INFO L168 Benchmark]: RCFGBuilder took 382.24 ms. Allocated memory is still 121.6 MB. Free memory was 96.8 MB in the beginning and 86.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:03:22,372 INFO L168 Benchmark]: TraceAbstraction took 18489.88 ms. Allocated memory was 121.6 MB in the beginning and 308.3 MB in the end (delta: 186.6 MB). Free memory was 85.7 MB in the beginning and 260.4 MB in the end (delta: -174.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:03:22,373 INFO L168 Benchmark]: Witness Printer took 41.33 ms. Allocated memory is still 308.3 MB. Free memory was 259.3 MB in the beginning and 257.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:03:22,375 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 59.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 314.66 ms. Allocated memory is still 121.6 MB. Free memory was 93.6 MB in the beginning and 99.2 MB in the end (delta: -5.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.08 ms. Allocated memory is still 121.6 MB. Free memory was 99.2 MB in the beginning and 97.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.62 ms. Allocated memory is still 121.6 MB. Free memory was 97.8 MB in the beginning and 96.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 382.24 ms. Allocated memory is still 121.6 MB. Free memory was 96.8 MB in the beginning and 86.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18489.88 ms. Allocated memory was 121.6 MB in the beginning and 308.3 MB in the end (delta: 186.6 MB). Free memory was 85.7 MB in the beginning and 260.4 MB in the end (delta: -174.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * Witness Printer took 41.33 ms. Allocated memory is still 308.3 MB. Free memory was 259.3 MB in the beginning and 257.2 MB in the end (delta: 2.1 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: 4]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.3s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 233 SDtfs, 504 SDslu, 1901 SDs, 0 SdLazy, 1407 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1623 GetRequests, 1237 SyntacticMatches, 2 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 7 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 1962 NumberOfCodeBlocks, 1962 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 1929 ConstructedInterpolants, 0 QuantifiedInterpolants, 383745 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2736 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5376/9248 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...