./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.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_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 e41a2d809c80fa02a88d74970854b389f65de2dd ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:04:14,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:04:14,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:04:14,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:04:14,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:04:14,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:04:14,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:04:14,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:04:14,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:04:14,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:04:14,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:04:14,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:04:14,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:04:14,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:04:14,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:04:14,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:04:14,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:04:14,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:04:14,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:04:14,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:04:14,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:04:14,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:04:14,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:04:14,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:04:14,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:04:14,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:04:14,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:04:14,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:04:14,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:04:14,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:04:14,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:04:14,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:04:14,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:04:14,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:04:14,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:04:14,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:04:14,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:04:14,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:04:14,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:04:14,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:04:14,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:04:14,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:04:14,931 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:04:14,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:04:14,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:04:14,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:04:14,935 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:04:14,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:04:14,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:04:14,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:04:14,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:04:14,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:04:14,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:04:14,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:04:14,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:04:14,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:04:14,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:04:14,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:04:14,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:04:14,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:04:14,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:04:14,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:04:14,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:04:14,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:04:14,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:04:14,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:04:14,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:04:14,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:04:14,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:04:14,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:04:14,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:04:14,942 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_a63dad93-2f97-4190-9cdb-3757887413c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e41a2d809c80fa02a88d74970854b389f65de2dd [2020-11-30 00:04:15,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:04:15,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:04:15,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:04:15,239 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:04:15,240 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:04:15,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2020-11-30 00:04:15,329 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/data/151658b4d/b483cd778ec84dacb767c840cb3a5505/FLAG6942a2e7b [2020-11-30 00:04:15,797 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:04:15,798 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2020-11-30 00:04:15,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/data/151658b4d/b483cd778ec84dacb767c840cb3a5505/FLAG6942a2e7b [2020-11-30 00:04:16,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/data/151658b4d/b483cd778ec84dacb767c840cb3a5505 [2020-11-30 00:04:16,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:04:16,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:04:16,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:04:16,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:04:16,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:04:16,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7998bd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16, skipping insertion in model container [2020-11-30 00:04:16,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:04:16,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:04:16,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:04:16,429 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:04:16,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:04:16,467 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:04:16,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16 WrapperNode [2020-11-30 00:04:16,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:04:16,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:04:16,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:04:16,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:04:16,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:04:16,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:04:16,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:04:16,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:04:16,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... [2020-11-30 00:04:16,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:04:16,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:04:16,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:04:16,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:04:16,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:04:16,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:04:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:04:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-30 00:04:16,603 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-30 00:04:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:04:16,779 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:04:16,779 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:04:16,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:04:16 BoogieIcfgContainer [2020-11-30 00:04:16,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:04:16,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:04:16,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:04:16,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:04:16,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:04:16" (1/3) ... [2020-11-30 00:04:16,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3503029b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:04:16, skipping insertion in model container [2020-11-30 00:04:16,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:04:16" (2/3) ... [2020-11-30 00:04:16,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3503029b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:04:16, skipping insertion in model container [2020-11-30 00:04:16,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:04:16" (3/3) ... [2020-11-30 00:04:16,789 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2020-11-30 00:04:16,800 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:04:16,803 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:04:16,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:04:16,838 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:04:16,838 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:04:16,839 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:04:16,839 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:04:16,839 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:04:16,839 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:04:16,839 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:04:16,839 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:04:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-30 00:04:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:04:16,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:16,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:16,860 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-30 00:04:16,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:16,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480946850] [2020-11-30 00:04:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:17,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:17,131 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 00:04:17,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480946850] [2020-11-30 00:04:17,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:04:17,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:04:17,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683622070] [2020-11-30 00:04:17,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:04:17,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:17,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:04:17,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:04:17,178 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-30 00:04:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:17,255 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-11-30 00:04:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:04:17,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 00:04:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:17,265 INFO L225 Difference]: With dead ends: 29 [2020-11-30 00:04:17,265 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 00:04:17,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:04:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 00:04:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-30 00:04:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 00:04:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-30 00:04:17,306 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-30 00:04:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:17,307 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-30 00:04:17,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:04:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-30 00:04:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 00:04:17,309 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:17,309 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:17,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:04:17,310 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-30 00:04:17,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:17,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499499785] [2020-11-30 00:04:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:17,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:17,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:17,476 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 00:04:17,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499499785] [2020-11-30 00:04:17,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005545790] [2020-11-30 00:04:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:17,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:04:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:17,637 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 00:04:17,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:17,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-30 00:04:17,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737274190] [2020-11-30 00:04:17,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:04:17,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:17,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:04:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:04:17,641 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-11-30 00:04:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:17,713 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-30 00:04:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:04:17,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-30 00:04:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:17,715 INFO L225 Difference]: With dead ends: 22 [2020-11-30 00:04:17,715 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 00:04:17,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:04:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 00:04:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 00:04:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 00:04:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-30 00:04:17,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-30 00:04:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:17,722 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-30 00:04:17,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:04:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-30 00:04:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 00:04:17,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:17,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:17,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 00:04:17,941 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-30 00:04:17,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:17,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861763497] [2020-11-30 00:04:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:18,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:18,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:18,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:18,113 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 00:04:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861763497] [2020-11-30 00:04:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941802799] [2020-11-30 00:04:18,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:18,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:04:18,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:04:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:18,221 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 00:04:18,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:18,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-30 00:04:18,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263814481] [2020-11-30 00:04:18,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 00:04:18,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 00:04:18,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:04:18,224 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-11-30 00:04:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:18,288 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-30 00:04:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:04:18,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-11-30 00:04:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:18,290 INFO L225 Difference]: With dead ends: 25 [2020-11-30 00:04:18,290 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 00:04:18,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:04:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 00:04:18,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 00:04:18,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 00:04:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-30 00:04:18,296 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-11-30 00:04:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:18,296 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-30 00:04:18,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 00:04:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-30 00:04:18,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 00:04:18,298 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:18,298 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:18,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:18,509 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:18,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-11-30 00:04:18,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:18,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637324223] [2020-11-30 00:04:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:18,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:18,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:18,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:18,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:18,696 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 00:04:18,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637324223] [2020-11-30 00:04:18,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742033233] [2020-11-30 00:04:18,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:18,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 00:04:18,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 00:04:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:18,908 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 00:04:18,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:18,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-11-30 00:04:18,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305986784] [2020-11-30 00:04:18,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 00:04:18,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 00:04:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-30 00:04:18,910 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2020-11-30 00:04:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:19,104 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-30 00:04:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 00:04:19,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-11-30 00:04:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:19,106 INFO L225 Difference]: With dead ends: 28 [2020-11-30 00:04:19,106 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 00:04:19,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-11-30 00:04:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 00:04:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 00:04:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 00:04:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-30 00:04:19,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-11-30 00:04:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:19,113 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-30 00:04:19,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 00:04:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-30 00:04:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-30 00:04:19,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:19,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:19,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:19,332 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:19,332 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-11-30 00:04:19,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:19,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121693085] [2020-11-30 00:04:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:19,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:19,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:19,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:19,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:19,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:19,537 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 00:04:19,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121693085] [2020-11-30 00:04:19,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92592077] [2020-11-30 00:04:19,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:19,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:04:19,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 00:04:19,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:19,662 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 00:04:19,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:19,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-30 00:04:19,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792958978] [2020-11-30 00:04:19,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 00:04:19,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:19,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 00:04:19,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:04:19,664 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-11-30 00:04:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:19,767 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-30 00:04:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:04:19,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-11-30 00:04:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:19,770 INFO L225 Difference]: With dead ends: 31 [2020-11-30 00:04:19,770 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 00:04:19,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-11-30 00:04:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 00:04:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 00:04:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 00:04:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-30 00:04:19,776 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-11-30 00:04:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:19,782 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-30 00:04:19,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 00:04:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-30 00:04:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-30 00:04:19,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:19,784 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:19,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:19,985 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-11-30 00:04:19,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:19,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153358489] [2020-11-30 00:04:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,201 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 00:04:20,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153358489] [2020-11-30 00:04:20,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413769673] [2020-11-30 00:04:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:20,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-30 00:04:20,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:04:20,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:20,375 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 00:04:20,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:20,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-30 00:04:20,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802278037] [2020-11-30 00:04:20,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 00:04:20,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:20,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 00:04:20,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:04:20,377 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-11-30 00:04:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:20,498 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-30 00:04:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 00:04:20,499 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-11-30 00:04:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:20,501 INFO L225 Difference]: With dead ends: 34 [2020-11-30 00:04:20,501 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 00:04:20,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-11-30 00:04:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 00:04:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-30 00:04:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 00:04:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-30 00:04:20,507 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-11-30 00:04:20,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:20,511 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-30 00:04:20,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 00:04:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-30 00:04:20,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-30 00:04:20,515 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:20,515 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:20,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 00:04:20,736 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-11-30 00:04:20,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:20,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356331064] [2020-11-30 00:04:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:20,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:21,001 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 00:04:21,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356331064] [2020-11-30 00:04:21,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734984229] [2020-11-30 00:04:21,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:21,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-30 00:04:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:21,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 00:04:21,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:21,400 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 00:04:21,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:21,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2020-11-30 00:04:21,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675392058] [2020-11-30 00:04:21,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-30 00:04:21,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:21,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-30 00:04:21,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-11-30 00:04:21,403 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 26 states. [2020-11-30 00:04:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:21,825 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-30 00:04:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 00:04:21,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2020-11-30 00:04:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:21,827 INFO L225 Difference]: With dead ends: 37 [2020-11-30 00:04:21,827 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 00:04:21,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2020-11-30 00:04:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 00:04:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-30 00:04:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 00:04:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-30 00:04:21,835 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-11-30 00:04:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:21,836 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-30 00:04:21,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-30 00:04:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-30 00:04:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-30 00:04:21,837 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:21,837 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:22,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:22,052 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:22,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-11-30 00:04:22,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:22,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798586938] [2020-11-30 00:04:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,289 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 00:04:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798586938] [2020-11-30 00:04:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136851140] [2020-11-30 00:04:22,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 00:04:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:22,450 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 00:04:22,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:22,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-30 00:04:22,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165317167] [2020-11-30 00:04:22,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 00:04:22,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:22,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 00:04:22,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:04:22,454 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2020-11-30 00:04:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:22,602 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-30 00:04:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 00:04:22,602 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-11-30 00:04:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:22,603 INFO L225 Difference]: With dead ends: 40 [2020-11-30 00:04:22,604 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 00:04:22,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-11-30 00:04:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 00:04:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-30 00:04:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 00:04:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-30 00:04:22,610 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-11-30 00:04:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:22,610 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-30 00:04:22,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 00:04:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-30 00:04:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-30 00:04:22,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:22,612 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:22,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:22,812 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:22,813 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-11-30 00:04:22,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:22,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365925704] [2020-11-30 00:04:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:22,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,090 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 00:04:23,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365925704] [2020-11-30 00:04:23,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299441641] [2020-11-30 00:04:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:23,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:04:23,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:04:23,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:23,248 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 00:04:23,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:23,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-30 00:04:23,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043212227] [2020-11-30 00:04:23,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 00:04:23,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:23,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 00:04:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-30 00:04:23,253 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2020-11-30 00:04:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:23,442 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-30 00:04:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 00:04:23,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-11-30 00:04:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:23,444 INFO L225 Difference]: With dead ends: 43 [2020-11-30 00:04:23,444 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 00:04:23,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-11-30 00:04:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 00:04:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-30 00:04:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-30 00:04:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-11-30 00:04:23,450 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-11-30 00:04:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:23,451 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-11-30 00:04:23,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 00:04:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-11-30 00:04:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-30 00:04:23,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:23,455 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:23,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-30 00:04:23,656 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-11-30 00:04:23,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:23,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235145723] [2020-11-30 00:04:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:23,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:24,022 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 00:04:24,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235145723] [2020-11-30 00:04:24,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41087142] [2020-11-30 00:04:24,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:24,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-30 00:04:24,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:24,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 00:04:24,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:24,616 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 00:04:24,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:24,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2020-11-30 00:04:24,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095192764] [2020-11-30 00:04:24,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-30 00:04:24,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:24,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-30 00:04:24,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 00:04:24,619 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 35 states. [2020-11-30 00:04:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:25,240 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-30 00:04:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-30 00:04:25,241 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 64 [2020-11-30 00:04:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:25,242 INFO L225 Difference]: With dead ends: 46 [2020-11-30 00:04:25,242 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 00:04:25,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2020-11-30 00:04:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 00:04:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-30 00:04:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-30 00:04:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-30 00:04:25,250 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-11-30 00:04:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:25,251 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-30 00:04:25,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-30 00:04:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-30 00:04:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-30 00:04:25,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:25,264 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:25,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:25,480 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-11-30 00:04:25,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:25,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048042588] [2020-11-30 00:04:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:25,841 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 00:04:25,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048042588] [2020-11-30 00:04:25,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561966550] [2020-11-30 00:04:25,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:25,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:04:25,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 00:04:25,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:26,002 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 00:04:26,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:26,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-30 00:04:26,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519090730] [2020-11-30 00:04:26,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 00:04:26,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:26,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 00:04:26,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-11-30 00:04:26,005 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2020-11-30 00:04:26,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:26,200 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-30 00:04:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 00:04:26,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-11-30 00:04:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:26,205 INFO L225 Difference]: With dead ends: 49 [2020-11-30 00:04:26,205 INFO L226 Difference]: Without dead ends: 45 [2020-11-30 00:04:26,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-11-30 00:04:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-30 00:04:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-30 00:04:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 00:04:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-11-30 00:04:26,212 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-11-30 00:04:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:26,212 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-11-30 00:04:26,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 00:04:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-11-30 00:04:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-30 00:04:26,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:26,214 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:26,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:26,414 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:26,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-11-30 00:04:26,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:26,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100314572] [2020-11-30 00:04:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:26,854 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 00:04:26,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100314572] [2020-11-30 00:04:26,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382424713] [2020-11-30 00:04:26,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:26,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-30 00:04:26,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:26,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-30 00:04:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:27,027 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 00:04:27,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:27,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-30 00:04:27,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216223736] [2020-11-30 00:04:27,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 00:04:27,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:27,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 00:04:27,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-11-30 00:04:27,029 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-11-30 00:04:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:27,239 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-11-30 00:04:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 00:04:27,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-11-30 00:04:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:27,240 INFO L225 Difference]: With dead ends: 52 [2020-11-30 00:04:27,240 INFO L226 Difference]: Without dead ends: 48 [2020-11-30 00:04:27,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-11-30 00:04:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-30 00:04:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-30 00:04:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 00:04:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-30 00:04:27,247 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-11-30 00:04:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:27,248 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-30 00:04:27,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 00:04:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-30 00:04:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-30 00:04:27,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:27,249 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:27,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 00:04:27,481 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:27,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-11-30 00:04:27,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:27,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370472250] [2020-11-30 00:04:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:27,929 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 00:04:27,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370472250] [2020-11-30 00:04:27,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747261919] [2020-11-30 00:04:27,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:28,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-30 00:04:28,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:28,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-30 00:04:28,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:28,101 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 00:04:28,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:28,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-30 00:04:28,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409352039] [2020-11-30 00:04:28,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-30 00:04:28,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:28,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-30 00:04:28,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-11-30 00:04:28,107 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 19 states. [2020-11-30 00:04:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:28,354 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-30 00:04:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 00:04:28,355 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-11-30 00:04:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:28,356 INFO L225 Difference]: With dead ends: 55 [2020-11-30 00:04:28,356 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 00:04:28,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-11-30 00:04:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 00:04:28,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-30 00:04:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-30 00:04:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-11-30 00:04:28,363 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-11-30 00:04:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:28,363 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-11-30 00:04:28,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-30 00:04:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-11-30 00:04:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-30 00:04:28,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:28,365 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:28,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-30 00:04:28,565 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:28,566 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-11-30 00:04:28,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:28,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840480883] [2020-11-30 00:04:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:28,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,065 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 00:04:29,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840480883] [2020-11-30 00:04:29,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363369354] [2020-11-30 00:04:29,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 00:04:29,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:29,250 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 00:04:29,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:29,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-30 00:04:29,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970581857] [2020-11-30 00:04:29,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 00:04:29,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 00:04:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-11-30 00:04:29,253 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-11-30 00:04:29,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:29,467 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-30 00:04:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 00:04:29,468 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2020-11-30 00:04:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:29,469 INFO L225 Difference]: With dead ends: 58 [2020-11-30 00:04:29,469 INFO L226 Difference]: Without dead ends: 54 [2020-11-30 00:04:29,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 00:04:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-30 00:04:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-30 00:04:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-30 00:04:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-11-30 00:04:29,475 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-11-30 00:04:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:29,475 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-11-30 00:04:29,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 00:04:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-11-30 00:04:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-30 00:04:29,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:29,477 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:29,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-30 00:04:29,692 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:29,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-11-30 00:04:29,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:29,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631541918] [2020-11-30 00:04:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:29,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:30,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:30,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:30,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:30,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:30,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:30,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:30,247 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 00:04:30,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631541918] [2020-11-30 00:04:30,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119400063] [2020-11-30 00:04:30,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:30,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:04:30,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-30 00:04:30,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:30,422 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 00:04:30,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:30,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-11-30 00:04:30,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071156238] [2020-11-30 00:04:30,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 00:04:30,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 00:04:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-11-30 00:04:30,424 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 21 states. [2020-11-30 00:04:30,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:30,674 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-11-30 00:04:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-30 00:04:30,675 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-11-30 00:04:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:30,675 INFO L225 Difference]: With dead ends: 61 [2020-11-30 00:04:30,675 INFO L226 Difference]: Without dead ends: 57 [2020-11-30 00:04:30,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-11-30 00:04:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-30 00:04:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-30 00:04:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-30 00:04:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-11-30 00:04:30,681 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-11-30 00:04:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:30,682 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-11-30 00:04:30,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 00:04:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-11-30 00:04:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-30 00:04:30,689 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:30,689 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:30,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:30,892 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-11-30 00:04:30,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:30,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265237582] [2020-11-30 00:04:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:30,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:30,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:31,495 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 00:04:31,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265237582] [2020-11-30 00:04:31,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414898652] [2020-11-30 00:04:31,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:31,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-30 00:04:31,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:31,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-30 00:04:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:31,685 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 00:04:31,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:31,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-30 00:04:31,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269727895] [2020-11-30 00:04:31,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-30 00:04:31,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:31,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-30 00:04:31,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-11-30 00:04:31,689 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 22 states. [2020-11-30 00:04:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:31,979 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-11-30 00:04:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 00:04:31,979 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-11-30 00:04:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:31,980 INFO L225 Difference]: With dead ends: 64 [2020-11-30 00:04:31,980 INFO L226 Difference]: Without dead ends: 60 [2020-11-30 00:04:31,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-11-30 00:04:31,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-30 00:04:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-30 00:04:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-30 00:04:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-11-30 00:04:31,986 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-11-30 00:04:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:31,987 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-11-30 00:04:31,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-30 00:04:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-11-30 00:04:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-30 00:04:31,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:31,989 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:32,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-30 00:04:32,200 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:32,200 INFO L82 PathProgramCache]: Analyzing trace with hash 35426954, now seen corresponding path program 16 times [2020-11-30 00:04:32,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:32,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633005524] [2020-11-30 00:04:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-30 00:04:32,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633005524] [2020-11-30 00:04:32,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291408919] [2020-11-30 00:04:32,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/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 00:04:32,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:04:32,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-30 00:04:32,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-30 00:04:33,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:33,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-30 00:04:33,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287056590] [2020-11-30 00:04:33,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-30 00:04:33,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:33,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-30 00:04:33,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-11-30 00:04:33,029 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 23 states. [2020-11-30 00:04:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:33,313 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-11-30 00:04:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-30 00:04:33,314 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-11-30 00:04:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:33,315 INFO L225 Difference]: With dead ends: 67 [2020-11-30 00:04:33,315 INFO L226 Difference]: Without dead ends: 63 [2020-11-30 00:04:33,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-11-30 00:04:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-30 00:04:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-30 00:04:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-30 00:04:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-11-30 00:04:33,322 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-11-30 00:04:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:33,323 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-11-30 00:04:33,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-30 00:04:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-11-30 00:04:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-30 00:04:33,324 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:33,324 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:33,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-30 00:04:33,525 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1604689196, now seen corresponding path program 17 times [2020-11-30 00:04:33,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:33,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3391663] [2020-11-30 00:04:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:33,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:34,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:34,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:34,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:34,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:34,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:34,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:34,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-30 00:04:34,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3391663] [2020-11-30 00:04:34,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914676384] [2020-11-30 00:04:34,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:34,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-30 00:04:34,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-30 00:04:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-30 00:04:34,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:34,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-11-30 00:04:34,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872313629] [2020-11-30 00:04:34,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-30 00:04:34,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:34,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-30 00:04:34,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-11-30 00:04:34,536 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2020-11-30 00:04:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:34,843 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-30 00:04:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-30 00:04:34,844 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-11-30 00:04:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:34,845 INFO L225 Difference]: With dead ends: 70 [2020-11-30 00:04:34,845 INFO L226 Difference]: Without dead ends: 66 [2020-11-30 00:04:34,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-11-30 00:04:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-30 00:04:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-11-30 00:04:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-30 00:04:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-11-30 00:04:34,851 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-11-30 00:04:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:34,852 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-11-30 00:04:34,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-30 00:04:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-11-30 00:04:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-11-30 00:04:34,854 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:34,854 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:35,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-30 00:04:35,062 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:35,062 INFO L82 PathProgramCache]: Analyzing trace with hash 427935434, now seen corresponding path program 18 times [2020-11-30 00:04:35,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:35,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790957862] [2020-11-30 00:04:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-30 00:04:35,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790957862] [2020-11-30 00:04:35,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990419807] [2020-11-30 00:04:35,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:35,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-30 00:04:35,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-30 00:04:35,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-30 00:04:37,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:37,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2020-11-30 00:04:37,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143360105] [2020-11-30 00:04:37,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-30 00:04:37,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:37,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-30 00:04:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2020-11-30 00:04:37,423 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 62 states. [2020-11-30 00:04:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:38,614 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-11-30 00:04:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-30 00:04:38,615 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 118 [2020-11-30 00:04:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:38,616 INFO L225 Difference]: With dead ends: 73 [2020-11-30 00:04:38,616 INFO L226 Difference]: Without dead ends: 69 [2020-11-30 00:04:38,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2020-11-30 00:04:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-30 00:04:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-11-30 00:04:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-30 00:04:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-11-30 00:04:38,626 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-11-30 00:04:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:38,626 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-11-30 00:04:38,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-30 00:04:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-11-30 00:04:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-30 00:04:38,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:38,628 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:38,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:38,844 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:38,844 INFO L82 PathProgramCache]: Analyzing trace with hash 653428628, now seen corresponding path program 19 times [2020-11-30 00:04:38,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:38,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010154440] [2020-11-30 00:04:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:38,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:38,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:38,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-30 00:04:39,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010154440] [2020-11-30 00:04:39,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817065009] [2020-11-30 00:04:39,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:39,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-30 00:04:39,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-30 00:04:39,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:39,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-30 00:04:39,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192066253] [2020-11-30 00:04:39,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-30 00:04:39,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:39,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-30 00:04:39,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-11-30 00:04:39,901 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 26 states. [2020-11-30 00:04:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:40,261 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-11-30 00:04:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-30 00:04:40,262 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 124 [2020-11-30 00:04:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:40,263 INFO L225 Difference]: With dead ends: 76 [2020-11-30 00:04:40,263 INFO L226 Difference]: Without dead ends: 72 [2020-11-30 00:04:40,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-11-30 00:04:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-30 00:04:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-11-30 00:04:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-30 00:04:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-11-30 00:04:40,271 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-11-30 00:04:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:40,274 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-11-30 00:04:40,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-30 00:04:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-11-30 00:04:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-30 00:04:40,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:40,276 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:40,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:40,500 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash -693736694, now seen corresponding path program 20 times [2020-11-30 00:04:40,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:40,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867802552] [2020-11-30 00:04:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:40,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:41,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:41,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:41,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:41,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:41,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:41,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:41,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-11-30 00:04:41,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867802552] [2020-11-30 00:04:41,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113741682] [2020-11-30 00:04:41,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:41,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:04:41,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-30 00:04:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-11-30 00:04:41,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:41,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-11-30 00:04:41,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420677038] [2020-11-30 00:04:41,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-30 00:04:41,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-30 00:04:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-11-30 00:04:41,641 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 27 states. [2020-11-30 00:04:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:42,024 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-11-30 00:04:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-30 00:04:42,025 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2020-11-30 00:04:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:42,026 INFO L225 Difference]: With dead ends: 79 [2020-11-30 00:04:42,026 INFO L226 Difference]: Without dead ends: 75 [2020-11-30 00:04:42,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2020-11-30 00:04:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-30 00:04:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-30 00:04:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-30 00:04:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-11-30 00:04:42,040 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2020-11-30 00:04:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:42,040 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-11-30 00:04:42,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-30 00:04:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-11-30 00:04:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-30 00:04:42,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:42,043 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:42,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-30 00:04:42,244 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash 205241428, now seen corresponding path program 21 times [2020-11-30 00:04:42,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:42,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684541782] [2020-11-30 00:04:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:42,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:43,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:43,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:43,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:43,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:43,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:43,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-11-30 00:04:43,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684541782] [2020-11-30 00:04:43,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234418615] [2020-11-30 00:04:43,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:43,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-11-30 00:04:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:43,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 46 conjunts are in the unsatisfiable core [2020-11-30 00:04:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-11-30 00:04:43,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:43,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-30 00:04:43,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000820143] [2020-11-30 00:04:43,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-30 00:04:43,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:43,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-30 00:04:43,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-11-30 00:04:43,606 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 28 states. [2020-11-30 00:04:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:44,010 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-11-30 00:04:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-30 00:04:44,010 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2020-11-30 00:04:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:44,011 INFO L225 Difference]: With dead ends: 82 [2020-11-30 00:04:44,012 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 00:04:44,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2020-11-30 00:04:44,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 00:04:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-30 00:04:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-30 00:04:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-11-30 00:04:44,018 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2020-11-30 00:04:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:44,018 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-11-30 00:04:44,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-30 00:04:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-11-30 00:04:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-30 00:04:44,020 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:44,020 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:44,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-30 00:04:44,240 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1446609078, now seen corresponding path program 22 times [2020-11-30 00:04:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:44,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515175263] [2020-11-30 00:04:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:44,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:45,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:45,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:45,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:45,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-11-30 00:04:45,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515175263] [2020-11-30 00:04:45,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201777258] [2020-11-30 00:04:45,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:45,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:04:45,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:45,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-30 00:04:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-11-30 00:04:45,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:45,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-11-30 00:04:45,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657015945] [2020-11-30 00:04:45,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-30 00:04:45,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-30 00:04:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-11-30 00:04:45,627 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 29 states. [2020-11-30 00:04:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:45,990 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-11-30 00:04:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-30 00:04:45,995 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2020-11-30 00:04:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:45,996 INFO L225 Difference]: With dead ends: 85 [2020-11-30 00:04:45,996 INFO L226 Difference]: Without dead ends: 81 [2020-11-30 00:04:45,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2020-11-30 00:04:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-30 00:04:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-11-30 00:04:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 00:04:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-11-30 00:04:46,002 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2020-11-30 00:04:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:46,002 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-11-30 00:04:46,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-30 00:04:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-11-30 00:04:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-11-30 00:04:46,004 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:46,004 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:46,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:46,212 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:46,212 INFO L82 PathProgramCache]: Analyzing trace with hash 12189972, now seen corresponding path program 23 times [2020-11-30 00:04:46,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:46,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568309430] [2020-11-30 00:04:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:46,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:47,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:47,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:47,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:47,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:47,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-11-30 00:04:47,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568309430] [2020-11-30 00:04:47,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676454455] [2020-11-30 00:04:47,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:47,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-11-30 00:04:47,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:47,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 50 conjunts are in the unsatisfiable core [2020-11-30 00:04:47,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-11-30 00:04:49,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:49,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2020-11-30 00:04:49,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645285448] [2020-11-30 00:04:49,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-11-30 00:04:49,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:49,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-11-30 00:04:49,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=4896, Unknown=0, NotChecked=0, Total=5852 [2020-11-30 00:04:49,231 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 77 states. [2020-11-30 00:04:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:50,979 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-11-30 00:04:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-30 00:04:50,980 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 148 [2020-11-30 00:04:50,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:50,981 INFO L225 Difference]: With dead ends: 88 [2020-11-30 00:04:50,981 INFO L226 Difference]: Without dead ends: 84 [2020-11-30 00:04:50,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2778, Invalid=12474, Unknown=0, NotChecked=0, Total=15252 [2020-11-30 00:04:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-30 00:04:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-30 00:04:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-30 00:04:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-11-30 00:04:50,997 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2020-11-30 00:04:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:50,997 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-11-30 00:04:50,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-11-30 00:04:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-11-30 00:04:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-30 00:04:50,999 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:51,000 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:51,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-30 00:04:51,225 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:51,226 INFO L82 PathProgramCache]: Analyzing trace with hash 236848010, now seen corresponding path program 24 times [2020-11-30 00:04:51,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:51,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009499140] [2020-11-30 00:04:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:51,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:52,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:52,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:52,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:52,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:52,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:52,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:52,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:52,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:04:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:04:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-11-30 00:04:52,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009499140] [2020-11-30 00:04:52,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741495944] [2020-11-30 00:04:52,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:52,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-11-30 00:04:52,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:04:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 52 conjunts are in the unsatisfiable core [2020-11-30 00:04:52,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:04:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-11-30 00:04:52,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:04:52,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-30 00:04:52,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133194285] [2020-11-30 00:04:52,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-30 00:04:52,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:04:52,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-30 00:04:52,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2020-11-30 00:04:52,753 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 31 states. [2020-11-30 00:04:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:04:53,171 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-11-30 00:04:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-30 00:04:53,171 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 154 [2020-11-30 00:04:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:04:53,172 INFO L225 Difference]: With dead ends: 91 [2020-11-30 00:04:53,172 INFO L226 Difference]: Without dead ends: 87 [2020-11-30 00:04:53,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2020-11-30 00:04:53,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-30 00:04:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-11-30 00:04:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-30 00:04:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-11-30 00:04:53,178 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2020-11-30 00:04:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:04:53,178 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-11-30 00:04:53,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-30 00:04:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-11-30 00:04:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-11-30 00:04:53,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:04:53,180 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:04:53,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:04:53,392 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:04:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:04:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1777423828, now seen corresponding path program 25 times [2020-11-30 00:04:53,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:04:53,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587087465] [2020-11-30 00:04:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:04:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:04:53,417 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:04:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:04:53,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:04:53,513 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:04:53,513 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:04:53,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-30 00:04:53,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:04:53 BoogieIcfgContainer [2020-11-30 00:04:53,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:04:53,624 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:04:53,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:04:53,624 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:04:53,625 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:04:16" (3/4) ... [2020-11-30 00:04:53,627 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:04:53,730 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a63dad93-2f97-4190-9cdb-3757887413c4/bin/uautomizer/witness.graphml [2020-11-30 00:04:53,730 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:04:53,732 INFO L168 Benchmark]: Toolchain (without parser) took 37537.20 ms. Allocated memory was 83.9 MB in the beginning and 536.9 MB in the end (delta: 453.0 MB). Free memory was 54.7 MB in the beginning and 407.1 MB in the end (delta: -352.5 MB). Peak memory consumption was 100.8 MB. Max. memory is 16.1 GB. [2020-11-30 00:04:53,732 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 83.9 MB. Free memory was 43.1 MB in the beginning and 43.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:04:53,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.39 ms. Allocated memory is still 83.9 MB. Free memory was 54.5 MB in the beginning and 62.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:04:53,734 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.83 ms. Allocated memory is still 83.9 MB. Free memory was 62.8 MB in the beginning and 61.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:04:53,734 INFO L168 Benchmark]: Boogie Preprocessor took 28.19 ms. Allocated memory is still 83.9 MB. Free memory was 61.3 MB in the beginning and 60.5 MB in the end (delta: 802.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:04:53,735 INFO L168 Benchmark]: RCFGBuilder took 242.35 ms. Allocated memory is still 83.9 MB. Free memory was 60.5 MB in the beginning and 50.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:04:53,735 INFO L168 Benchmark]: TraceAbstraction took 36841.36 ms. Allocated memory was 83.9 MB in the beginning and 536.9 MB in the end (delta: 453.0 MB). Free memory was 49.6 MB in the beginning and 414.5 MB in the end (delta: -364.9 MB). Peak memory consumption was 89.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:04:53,735 INFO L168 Benchmark]: Witness Printer took 106.47 ms. Allocated memory is still 536.9 MB. Free memory was 414.5 MB in the beginning and 407.1 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:04:53,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 83.9 MB. Free memory was 43.1 MB in the beginning and 43.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 274.39 ms. Allocated memory is still 83.9 MB. Free memory was 54.5 MB in the beginning and 62.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.83 ms. Allocated memory is still 83.9 MB. Free memory was 62.8 MB in the beginning and 61.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.19 ms. Allocated memory is still 83.9 MB. Free memory was 61.3 MB in the beginning and 60.5 MB in the end (delta: 802.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 242.35 ms. Allocated memory is still 83.9 MB. Free memory was 60.5 MB in the beginning and 50.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 36841.36 ms. Allocated memory was 83.9 MB in the beginning and 536.9 MB in the end (delta: 453.0 MB). Free memory was 49.6 MB in the beginning and 414.5 MB in the end (delta: -364.9 MB). Peak memory consumption was 89.2 MB. Max. memory is 16.1 GB. * Witness Printer took 106.47 ms. Allocated memory is still 536.9 MB. Free memory was 414.5 MB in the beginning and 407.1 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 25; [L13] CALL, EXPR id(input) VAL [\old(x)=25] [L7] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L8] CALL, EXPR id(x-1) VAL [\old(x)=24] [L7] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L8] CALL, EXPR id(x-1) VAL [\old(x)=23] [L7] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L8] CALL, EXPR id(x-1) VAL [\old(x)=22] [L7] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L8] CALL, EXPR id(x-1) VAL [\old(x)=21] [L7] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L8] CALL, EXPR id(x-1) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 25 [L4] __assert_fail("0", "id_i25_o25-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 36.6s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 250 SDtfs, 1100 SDslu, 1807 SDs, 0 SdLazy, 1553 SolverSat, 335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3450 GetRequests, 2521 SyntacticMatches, 0 SemanticMatches, 929 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10621 ImplicationChecksByTransitivity, 17.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=25, 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, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 19.5s InterpolantComputationTime, 4250 NumberOfCodeBlocks, 4250 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4041 ConstructedInterpolants, 0 QuantifiedInterpolants, 1070277 SizeOfPredicates, 284 NumberOfNonLiveVariables, 5472 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 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 incorrect! Received shutdown request...