./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 980109aaf5797fcdc56688cd1127831babfd66a2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:00:29,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:00:29,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:00:29,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:00:29,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:00:29,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:00:29,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:00:29,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:00:29,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:00:29,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:00:29,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:00:29,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:00:29,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:00:29,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:00:29,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:00:29,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:00:29,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:00:29,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:00:29,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:00:29,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:00:29,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:00:29,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:00:29,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:00:29,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:00:29,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:00:29,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:00:29,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:00:29,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:00:29,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:00:29,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:00:29,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:00:29,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:00:29,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:00:29,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:00:29,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:00:29,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:00:29,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:00:29,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:00:29,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:00:29,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:00:29,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:00:29,890 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:00:29,900 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:00:29,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:00:29,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:00:29,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:00:29,902 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:00:29,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:00:29,902 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:00:29,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:00:29,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:00:29,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:00:29,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:00:29,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:00:29,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:00:29,903 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:00:29,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:00:29,903 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:00:29,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:00:29,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:00:29,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:00:29,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:00:29,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:00:29,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:00:29,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:00:29,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:00:29,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:00:29,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:00:29,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:00:29,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:00:29,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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(__VERIFIER_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 -> 980109aaf5797fcdc56688cd1127831babfd66a2 [2019-10-22 09:00:29,939 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:00:29,948 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:00:29,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:00:29,959 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:00:29,960 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:00:29,960 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2019-10-22 09:00:30,014 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/data/d70b3400c/caaa885690c34206a678fefd6415bc5e/FLAG94b5aebc8 [2019-10-22 09:00:30,368 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:00:30,368 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2019-10-22 09:00:30,373 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/data/d70b3400c/caaa885690c34206a678fefd6415bc5e/FLAG94b5aebc8 [2019-10-22 09:00:30,383 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/data/d70b3400c/caaa885690c34206a678fefd6415bc5e [2019-10-22 09:00:30,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:00:30,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:00:30,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:30,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:00:30,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:00:30,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b75e78c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30, skipping insertion in model container [2019-10-22 09:00:30,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,404 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:00:30,417 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:00:30,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:30,565 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:00:30,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:30,667 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:00:30,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30 WrapperNode [2019-10-22 09:00:30,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:30,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:30,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:00:30,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:00:30,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:30,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:00:30,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:00:30,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:00:30,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... [2019-10-22 09:00:30,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:00:30,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:00:30,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:00:30,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:00:30,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:30,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:00:30,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:00:30,778 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 09:00:30,778 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 09:00:30,880 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:00:30,880 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 09:00:30,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:30 BoogieIcfgContainer [2019-10-22 09:00:30,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:00:30,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:00:30,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:00:30,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:00:30,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:00:30" (1/3) ... [2019-10-22 09:00:30,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0a9065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:30, skipping insertion in model container [2019-10-22 09:00:30,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:30" (2/3) ... [2019-10-22 09:00:30,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0a9065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:30, skipping insertion in model container [2019-10-22 09:00:30,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:30" (3/3) ... [2019-10-22 09:00:30,889 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2019-10-22 09:00:30,896 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:00:30,901 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:00:30,911 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:00:30,932 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:00:30,932 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:00:30,932 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:00:30,932 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:00:30,933 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:00:30,933 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:00:30,933 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:00:30,933 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:00:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 09:00:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 09:00:30,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:30,954 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:30,956 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-10-22 09:00:30,972 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:30,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841570116] [2019-10-22 09:00:30,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:30,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:30,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:31,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841570116] [2019-10-22 09:00:31,161 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:31,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:00:31,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462955687] [2019-10-22 09:00:31,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:00:31,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:00:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:00:31,182 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-10-22 09:00:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:31,261 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-10-22 09:00:31,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:00:31,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 09:00:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:31,272 INFO L225 Difference]: With dead ends: 24 [2019-10-22 09:00:31,272 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 09:00:31,275 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 09:00:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 09:00:31,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 09:00:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 09:00:31,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-22 09:00:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:31,309 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 09:00:31,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:00:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 09:00:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 09:00:31,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:31,310 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:31,311 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:31,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:31,311 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-10-22 09:00:31,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:31,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301308163] [2019-10-22 09:00:31,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:31,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:31,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:31,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301308163] [2019-10-22 09:00:31,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939142717] [2019-10-22 09:00:31,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:00:31,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:31,470 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:31,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-10-22 09:00:31,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889148630] [2019-10-22 09:00:31,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:00:31,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:31,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:00:31,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:00:31,473 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-10-22 09:00:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:31,535 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-10-22 09:00:31,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:00:31,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-22 09:00:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:31,538 INFO L225 Difference]: With dead ends: 21 [2019-10-22 09:00:31,538 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 09:00:31,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:00:31,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 09:00:31,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 09:00:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 09:00:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-22 09:00:31,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-10-22 09:00:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:31,546 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-22 09:00:31,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:00:31,547 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-22 09:00:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 09:00:31,548 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:31,548 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:31,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:31,748 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:31,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-10-22 09:00:31,749 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:31,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233553275] [2019-10-22 09:00:31,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:31,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:31,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 09:00:31,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233553275] [2019-10-22 09:00:31,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639394878] [2019-10-22 09:00:31,882 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:31,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:31,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:31,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:00:31,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 09:00:31,957 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:31,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-10-22 09:00:31,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342616627] [2019-10-22 09:00:31,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:00:31,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:31,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:00:31,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:00:31,959 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-10-22 09:00:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:32,032 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-10-22 09:00:32,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:00:32,034 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-10-22 09:00:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:32,035 INFO L225 Difference]: With dead ends: 24 [2019-10-22 09:00:32,035 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 09:00:32,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:00:32,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 09:00:32,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 09:00:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 09:00:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 09:00:32,039 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-10-22 09:00:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:32,039 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 09:00:32,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:00:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 09:00:32,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 09:00:32,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:32,040 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:32,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:32,241 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:32,241 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-10-22 09:00:32,242 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:32,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501328416] [2019-10-22 09:00:32,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:32,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:32,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 09:00:32,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501328416] [2019-10-22 09:00:32,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863494369] [2019-10-22 09:00:32,399 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:32,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 09:00:32,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:32,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:00:32,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 09:00:32,460 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:32,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-10-22 09:00:32,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536027724] [2019-10-22 09:00:32,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:00:32,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:32,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:00:32,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:00:32,461 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-10-22 09:00:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:32,533 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 09:00:32,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:00:32,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-10-22 09:00:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:32,535 INFO L225 Difference]: With dead ends: 27 [2019-10-22 09:00:32,535 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 09:00:32,535 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:00:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 09:00:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 09:00:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 09:00:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-22 09:00:32,544 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-10-22 09:00:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:32,544 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-22 09:00:32,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:00:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-22 09:00:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 09:00:32,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:32,545 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:32,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:32,746 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-10-22 09:00:32,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:32,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373971735] [2019-10-22 09:00:32,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:32,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:32,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 09:00:32,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373971735] [2019-10-22 09:00:32,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546190482] [2019-10-22 09:00:32,866 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:32,893 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:32,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:32,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:00:32,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 09:00:32,928 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:32,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-10-22 09:00:32,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130864062] [2019-10-22 09:00:32,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:00:32,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:00:32,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:00:32,930 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2019-10-22 09:00:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:33,008 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-10-22 09:00:33,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:00:33,008 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-10-22 09:00:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:33,009 INFO L225 Difference]: With dead ends: 30 [2019-10-22 09:00:33,009 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 09:00:33,010 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:00:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 09:00:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 09:00:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:00:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-22 09:00:33,015 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-10-22 09:00:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:33,015 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-22 09:00:33,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:00:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-22 09:00:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 09:00:33,016 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:33,016 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:33,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:33,217 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-10-22 09:00:33,218 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:33,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811420340] [2019-10-22 09:00:33,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:33,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:33,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 09:00:33,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811420340] [2019-10-22 09:00:33,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282475410] [2019-10-22 09:00:33,378 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:33,420 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 09:00:33,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:33,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 09:00:33,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 09:00:33,473 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:33,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2019-10-22 09:00:33,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530085198] [2019-10-22 09:00:33,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:00:33,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:33,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:00:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:00:33,477 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2019-10-22 09:00:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:33,567 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-10-22 09:00:33,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:00:33,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-10-22 09:00:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:33,568 INFO L225 Difference]: With dead ends: 33 [2019-10-22 09:00:33,569 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 09:00:33,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:00:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 09:00:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 09:00:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 09:00:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-22 09:00:33,574 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-10-22 09:00:33,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:33,574 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-22 09:00:33,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:00:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-22 09:00:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 09:00:33,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:33,576 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:33,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:33,777 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:33,777 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-10-22 09:00:33,777 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:33,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114600576] [2019-10-22 09:00:33,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:33,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:33,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 09:00:33,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114600576] [2019-10-22 09:00:33,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53510945] [2019-10-22 09:00:33,989 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:34,025 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 09:00:34,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:34,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 09:00:34,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 09:00:34,063 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:34,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-10-22 09:00:34,063 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174825981] [2019-10-22 09:00:34,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:00:34,064 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:34,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:00:34,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:00:34,064 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2019-10-22 09:00:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:34,155 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-22 09:00:34,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 09:00:34,155 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-10-22 09:00:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:34,156 INFO L225 Difference]: With dead ends: 36 [2019-10-22 09:00:34,156 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 09:00:34,157 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:00:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 09:00:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 09:00:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 09:00:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-22 09:00:34,161 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-10-22 09:00:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:34,161 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-22 09:00:34,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:00:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-22 09:00:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 09:00:34,163 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:34,163 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:34,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:34,364 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:34,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:34,364 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-10-22 09:00:34,364 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:34,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892424315] [2019-10-22 09:00:34,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:34,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:34,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 09:00:34,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892424315] [2019-10-22 09:00:34,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22178260] [2019-10-22 09:00:34,523 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:00:34,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 09:00:34,604 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:34,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-10-22 09:00:34,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509644142] [2019-10-22 09:00:34,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 09:00:34,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:00:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:00:34,605 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-10-22 09:00:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:34,724 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-10-22 09:00:34,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:00:34,725 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2019-10-22 09:00:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:34,725 INFO L225 Difference]: With dead ends: 39 [2019-10-22 09:00:34,725 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 09:00:34,726 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:00:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 09:00:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-22 09:00:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 09:00:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-22 09:00:34,735 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-10-22 09:00:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:34,735 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-22 09:00:34,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 09:00:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-22 09:00:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-22 09:00:34,736 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:34,736 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:34,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:34,937 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:34,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-10-22 09:00:34,938 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:34,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864477826] [2019-10-22 09:00:34,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:34,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:34,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-22 09:00:35,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864477826] [2019-10-22 09:00:35,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46291847] [2019-10-22 09:00:35,128 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:35,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:35,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:35,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 09:00:35,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-22 09:00:35,212 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:35,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-10-22 09:00:35,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963269120] [2019-10-22 09:00:35,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:00:35,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:35,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:00:35,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:00:35,214 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2019-10-22 09:00:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:35,324 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-10-22 09:00:35,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:00:35,325 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-10-22 09:00:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:35,326 INFO L225 Difference]: With dead ends: 42 [2019-10-22 09:00:35,326 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 09:00:35,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:00:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 09:00:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-22 09:00:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 09:00:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-22 09:00:35,335 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-10-22 09:00:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:35,335 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-22 09:00:35,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:00:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-22 09:00:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-22 09:00:35,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:35,336 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:35,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:35,537 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-10-22 09:00:35,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:35,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375565464] [2019-10-22 09:00:35,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:35,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:35,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-22 09:00:35,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375565464] [2019-10-22 09:00:35,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383370410] [2019-10-22 09:00:35,749 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:35,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-22 09:00:35,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:35,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 09:00:35,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-22 09:00:35,830 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:35,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-10-22 09:00:35,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722109470] [2019-10-22 09:00:35,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 09:00:35,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:35,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 09:00:35,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:00:35,832 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2019-10-22 09:00:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:35,943 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-10-22 09:00:35,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:00:35,943 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-10-22 09:00:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:35,944 INFO L225 Difference]: With dead ends: 45 [2019-10-22 09:00:35,944 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 09:00:35,945 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2019-10-22 09:00:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 09:00:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-22 09:00:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-22 09:00:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-22 09:00:35,949 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-10-22 09:00:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:35,950 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-22 09:00:35,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 09:00:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-22 09:00:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-22 09:00:35,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:35,951 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:36,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:36,152 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:36,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-10-22 09:00:36,152 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:36,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076526124] [2019-10-22 09:00:36,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:36,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:36,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 09:00:36,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076526124] [2019-10-22 09:00:36,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344925347] [2019-10-22 09:00:36,375 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:36,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:36,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:36,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 09:00:36,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 09:00:36,480 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:36,480 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2019-10-22 09:00:36,480 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364045664] [2019-10-22 09:00:36,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 09:00:36,481 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:36,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 09:00:36,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:00:36,482 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2019-10-22 09:00:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:36,615 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-10-22 09:00:36,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 09:00:36,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2019-10-22 09:00:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:36,616 INFO L225 Difference]: With dead ends: 48 [2019-10-22 09:00:36,616 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 09:00:36,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-10-22 09:00:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 09:00:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-22 09:00:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 09:00:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-10-22 09:00:36,621 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-10-22 09:00:36,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:36,621 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-10-22 09:00:36,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 09:00:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-10-22 09:00:36,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-22 09:00:36,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:36,622 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:36,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:36,823 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:36,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-10-22 09:00:36,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:36,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72404420] [2019-10-22 09:00:36,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:36,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:36,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-22 09:00:37,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72404420] [2019-10-22 09:00:37,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469502893] [2019-10-22 09:00:37,141 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:37,197 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-22 09:00:37,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:37,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 09:00:37,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-22 09:00:37,255 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:37,255 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-10-22 09:00:37,255 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042616765] [2019-10-22 09:00:37,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-22 09:00:37,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-22 09:00:37,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:00:37,257 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2019-10-22 09:00:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:37,394 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-10-22 09:00:37,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:00:37,395 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2019-10-22 09:00:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:37,396 INFO L225 Difference]: With dead ends: 51 [2019-10-22 09:00:37,396 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 09:00:37,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2019-10-22 09:00:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 09:00:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-22 09:00:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 09:00:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-10-22 09:00:37,405 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-10-22 09:00:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:37,406 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-10-22 09:00:37,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-22 09:00:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-10-22 09:00:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-22 09:00:37,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:37,407 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:37,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:37,607 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:37,608 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-10-22 09:00:37,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:37,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416514044] [2019-10-22 09:00:37,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:37,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:37,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-22 09:00:37,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416514044] [2019-10-22 09:00:37,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795026481] [2019-10-22 09:00:37,908 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:37,953 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-22 09:00:37,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:37,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-22 09:00:37,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-22 09:00:38,011 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:38,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2019-10-22 09:00:38,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363496382] [2019-10-22 09:00:38,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 09:00:38,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:38,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 09:00:38,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:00:38,012 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2019-10-22 09:00:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:38,166 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-10-22 09:00:38,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 09:00:38,166 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2019-10-22 09:00:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:38,167 INFO L225 Difference]: With dead ends: 54 [2019-10-22 09:00:38,167 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 09:00:38,168 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2019-10-22 09:00:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 09:00:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 09:00:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 09:00:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-22 09:00:38,177 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-10-22 09:00:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:38,178 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-22 09:00:38,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 09:00:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-22 09:00:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-22 09:00:38,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:38,179 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:38,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:38,382 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-10-22 09:00:38,382 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:38,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79818906] [2019-10-22 09:00:38,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:38,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:38,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-22 09:00:38,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79818906] [2019-10-22 09:00:38,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363377563] [2019-10-22 09:00:38,739 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-22 09:00:38,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-22 09:00:38,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:38,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2019-10-22 09:00:38,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594542207] [2019-10-22 09:00:38,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 09:00:38,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:38,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 09:00:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:00:38,839 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 20 states. [2019-10-22 09:00:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:38,994 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-10-22 09:00:38,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:00:38,995 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2019-10-22 09:00:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:38,996 INFO L225 Difference]: With dead ends: 57 [2019-10-22 09:00:38,996 INFO L226 Difference]: Without dead ends: 53 [2019-10-22 09:00:38,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 09:00:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-22 09:00:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-22 09:00:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 09:00:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-10-22 09:00:39,006 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-10-22 09:00:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:39,006 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-10-22 09:00:39,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 09:00:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-10-22 09:00:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-22 09:00:39,009 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:39,009 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:39,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:39,210 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:39,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-10-22 09:00:39,210 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:39,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665722801] [2019-10-22 09:00:39,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:39,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:39,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-22 09:00:39,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665722801] [2019-10-22 09:00:39,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507177855] [2019-10-22 09:00:39,606 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:39,651 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:39,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:39,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-22 09:00:39,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-22 09:00:39,729 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:39,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2019-10-22 09:00:39,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567095173] [2019-10-22 09:00:39,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 09:00:39,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:39,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 09:00:39,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:00:39,732 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2019-10-22 09:00:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:39,922 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-10-22 09:00:39,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 09:00:39,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2019-10-22 09:00:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:39,923 INFO L225 Difference]: With dead ends: 60 [2019-10-22 09:00:39,924 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 09:00:39,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 09:00:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 09:00:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-22 09:00:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-22 09:00:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-10-22 09:00:39,929 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-10-22 09:00:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:39,929 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-10-22 09:00:39,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 09:00:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-10-22 09:00:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-22 09:00:39,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:39,931 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:40,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:40,131 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:40,131 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-10-22 09:00:40,132 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:40,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568888715] [2019-10-22 09:00:40,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:40,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:40,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 09:00:40,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568888715] [2019-10-22 09:00:40,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635911592] [2019-10-22 09:00:40,500 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:40,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-22 09:00:40,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:40,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-22 09:00:40,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 09:00:40,631 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:40,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2019-10-22 09:00:40,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793487029] [2019-10-22 09:00:40,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 09:00:40,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 09:00:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:00:40,633 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 22 states. [2019-10-22 09:00:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:40,811 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-10-22 09:00:40,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 09:00:40,811 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2019-10-22 09:00:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:40,812 INFO L225 Difference]: With dead ends: 63 [2019-10-22 09:00:40,812 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 09:00:40,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2019-10-22 09:00:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 09:00:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-22 09:00:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-22 09:00:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-10-22 09:00:40,817 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-10-22 09:00:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:40,817 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-10-22 09:00:40,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 09:00:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-10-22 09:00:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-22 09:00:40,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:40,819 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:41,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:41,020 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:41,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-10-22 09:00:41,020 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:41,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759586090] [2019-10-22 09:00:41,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:41,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:41,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-22 09:00:41,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759586090] [2019-10-22 09:00:41,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690638293] [2019-10-22 09:00:41,461 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:41,510 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:41,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:41,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-22 09:00:41,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-22 09:00:41,560 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:41,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2019-10-22 09:00:41,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855288486] [2019-10-22 09:00:41,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 09:00:41,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 09:00:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:00:41,561 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 23 states. [2019-10-22 09:00:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:41,741 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-10-22 09:00:41,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 09:00:41,742 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2019-10-22 09:00:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:41,743 INFO L225 Difference]: With dead ends: 66 [2019-10-22 09:00:41,743 INFO L226 Difference]: Without dead ends: 62 [2019-10-22 09:00:41,744 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2019-10-22 09:00:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-22 09:00:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-22 09:00:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-22 09:00:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-10-22 09:00:41,755 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-10-22 09:00:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:41,756 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-10-22 09:00:41,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 09:00:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-10-22 09:00:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-22 09:00:41,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:41,758 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:41,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:41,962 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-10-22 09:00:41,963 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:41,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465551544] [2019-10-22 09:00:41,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:41,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:41,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-22 09:00:42,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465551544] [2019-10-22 09:00:42,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932553423] [2019-10-22 09:00:42,446 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:42,511 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-22 09:00:42,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:42,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-22 09:00:42,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-22 09:00:42,563 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:42,564 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2019-10-22 09:00:42,564 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014344067] [2019-10-22 09:00:42,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 09:00:42,564 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 09:00:42,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:00:42,565 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 24 states. [2019-10-22 09:00:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:42,764 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-10-22 09:00:42,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 09:00:42,765 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2019-10-22 09:00:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:42,766 INFO L225 Difference]: With dead ends: 69 [2019-10-22 09:00:42,766 INFO L226 Difference]: Without dead ends: 65 [2019-10-22 09:00:42,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2019-10-22 09:00:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-22 09:00:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-10-22 09:00:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-22 09:00:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-10-22 09:00:42,773 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-10-22 09:00:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:42,774 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-10-22 09:00:42,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 09:00:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-10-22 09:00:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-22 09:00:42,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:42,776 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:42,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:42,976 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:42,977 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-10-22 09:00:42,977 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:42,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812315320] [2019-10-22 09:00:42,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:42,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:42,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-22 09:00:43,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812315320] [2019-10-22 09:00:43,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066846595] [2019-10-22 09:00:43,517 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:43,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-22 09:00:43,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:43,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-22 09:00:43,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-22 09:00:43,670 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:43,670 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2019-10-22 09:00:43,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098101952] [2019-10-22 09:00:43,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 09:00:43,671 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:43,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 09:00:43,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:00:43,672 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 25 states. [2019-10-22 09:00:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:43,881 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-10-22 09:00:43,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 09:00:43,882 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2019-10-22 09:00:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:43,882 INFO L225 Difference]: With dead ends: 72 [2019-10-22 09:00:43,882 INFO L226 Difference]: Without dead ends: 68 [2019-10-22 09:00:43,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2019-10-22 09:00:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-22 09:00:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-22 09:00:43,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-22 09:00:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-10-22 09:00:43,887 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-10-22 09:00:43,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:43,887 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-10-22 09:00:43,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 09:00:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-10-22 09:00:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-22 09:00:43,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:43,889 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:44,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:44,089 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-10-22 09:00:44,089 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:44,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352179099] [2019-10-22 09:00:44,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:44,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:44,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-22 09:00:44,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352179099] [2019-10-22 09:00:44,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976985143] [2019-10-22 09:00:44,620 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-22 09:00:44,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-22 09:00:44,747 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:44,747 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2019-10-22 09:00:44,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253625970] [2019-10-22 09:00:44,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-22 09:00:44,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:44,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-22 09:00:44,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2019-10-22 09:00:44,748 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 26 states. [2019-10-22 09:00:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:44,984 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-10-22 09:00:44,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-22 09:00:44,984 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-10-22 09:00:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:44,985 INFO L225 Difference]: With dead ends: 75 [2019-10-22 09:00:44,985 INFO L226 Difference]: Without dead ends: 71 [2019-10-22 09:00:44,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2019-10-22 09:00:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-22 09:00:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-22 09:00:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-22 09:00:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-10-22 09:00:44,990 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-10-22 09:00:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:44,990 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-10-22 09:00:44,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-22 09:00:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-10-22 09:00:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-22 09:00:44,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:44,992 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:45,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:45,192 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-10-22 09:00:45,192 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:45,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475349929] [2019-10-22 09:00:45,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:45,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:45,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-10-22 09:00:45,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475349929] [2019-10-22 09:00:45,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453770433] [2019-10-22 09:00:45,770 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:45,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:45,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:45,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 44 conjunts are in the unsatisfiable core [2019-10-22 09:00:45,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-10-22 09:00:45,903 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:45,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2019-10-22 09:00:45,903 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377450275] [2019-10-22 09:00:45,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-22 09:00:45,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:45,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-22 09:00:45,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2019-10-22 09:00:45,905 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 27 states. [2019-10-22 09:00:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:46,141 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-10-22 09:00:46,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-22 09:00:46,142 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 129 [2019-10-22 09:00:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:46,143 INFO L225 Difference]: With dead ends: 78 [2019-10-22 09:00:46,143 INFO L226 Difference]: Without dead ends: 74 [2019-10-22 09:00:46,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2019-10-22 09:00:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-22 09:00:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-10-22 09:00:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-22 09:00:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-10-22 09:00:46,152 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2019-10-22 09:00:46,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:46,153 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-10-22 09:00:46,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-22 09:00:46,153 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-10-22 09:00:46,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-22 09:00:46,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:46,154 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:46,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:46,357 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2019-10-22 09:00:46,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:46,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276430587] [2019-10-22 09:00:46,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:46,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:46,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-10-22 09:00:46,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276430587] [2019-10-22 09:00:46,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390318138] [2019-10-22 09:00:46,980 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:47,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-22 09:00:47,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:47,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 46 conjunts are in the unsatisfiable core [2019-10-22 09:00:47,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-10-22 09:00:47,135 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:47,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2019-10-22 09:00:47,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839169093] [2019-10-22 09:00:47,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-22 09:00:47,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:47,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-22 09:00:47,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2019-10-22 09:00:47,137 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 28 states. [2019-10-22 09:00:47,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:47,437 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-10-22 09:00:47,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 09:00:47,439 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 135 [2019-10-22 09:00:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:47,440 INFO L225 Difference]: With dead ends: 81 [2019-10-22 09:00:47,440 INFO L226 Difference]: Without dead ends: 77 [2019-10-22 09:00:47,441 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2019-10-22 09:00:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-22 09:00:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-10-22 09:00:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-22 09:00:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-10-22 09:00:47,451 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2019-10-22 09:00:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:47,451 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-10-22 09:00:47,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-22 09:00:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-10-22 09:00:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-22 09:00:47,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:47,452 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:47,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:47,653 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash -555819607, now seen corresponding path program 22 times [2019-10-22 09:00:47,653 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:47,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937370893] [2019-10-22 09:00:47,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:47,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:47,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-10-22 09:00:48,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937370893] [2019-10-22 09:00:48,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157055531] [2019-10-22 09:00:48,362 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:48,431 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:48,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:48,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-22 09:00:48,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-10-22 09:00:48,535 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:48,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2019-10-22 09:00:48,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692306515] [2019-10-22 09:00:48,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-22 09:00:48,537 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:48,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-22 09:00:48,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2019-10-22 09:00:48,537 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 29 states. [2019-10-22 09:00:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:48,756 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-10-22 09:00:48,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-22 09:00:48,757 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 141 [2019-10-22 09:00:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:48,757 INFO L225 Difference]: With dead ends: 84 [2019-10-22 09:00:48,757 INFO L226 Difference]: Without dead ends: 80 [2019-10-22 09:00:48,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2019-10-22 09:00:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-22 09:00:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-10-22 09:00:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-22 09:00:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-10-22 09:00:48,761 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2019-10-22 09:00:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:48,761 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-10-22 09:00:48,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-22 09:00:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-10-22 09:00:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-22 09:00:48,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:48,763 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:48,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:48,963 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:48,964 INFO L82 PathProgramCache]: Analyzing trace with hash -945685357, now seen corresponding path program 23 times [2019-10-22 09:00:48,964 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:48,964 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334125820] [2019-10-22 09:00:48,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:48,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:48,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-10-22 09:00:49,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334125820] [2019-10-22 09:00:49,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737409764] [2019-10-22 09:00:49,778 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:49,877 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-22 09:00:49,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:49,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-22 09:00:49,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-10-22 09:00:49,982 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:49,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2019-10-22 09:00:49,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635585380] [2019-10-22 09:00:49,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-22 09:00:49,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:49,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-22 09:00:49,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2019-10-22 09:00:49,983 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 30 states. [2019-10-22 09:00:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:50,236 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2019-10-22 09:00:50,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-22 09:00:50,237 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2019-10-22 09:00:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:50,237 INFO L225 Difference]: With dead ends: 87 [2019-10-22 09:00:50,238 INFO L226 Difference]: Without dead ends: 83 [2019-10-22 09:00:50,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1031, Invalid=1831, Unknown=0, NotChecked=0, Total=2862 [2019-10-22 09:00:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-22 09:00:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-22 09:00:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-22 09:00:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-10-22 09:00:50,242 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2019-10-22 09:00:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:50,243 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-10-22 09:00:50,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-22 09:00:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-10-22 09:00:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-22 09:00:50,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:50,244 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:50,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:50,444 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1588806697, now seen corresponding path program 24 times [2019-10-22 09:00:50,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:50,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447460770] [2019-10-22 09:00:50,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-10-22 09:00:51,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447460770] [2019-10-22 09:00:51,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677400277] [2019-10-22 09:00:51,309 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/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 [2019-10-22 09:00:51,399 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-22 09:00:51,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:51,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-22 09:00:51,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-10-22 09:00:51,474 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:51,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2019-10-22 09:00:51,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234243127] [2019-10-22 09:00:51,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-22 09:00:51,475 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-22 09:00:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2019-10-22 09:00:51,475 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 31 states. [2019-10-22 09:00:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:51,722 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2019-10-22 09:00:51,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-22 09:00:51,722 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 153 [2019-10-22 09:00:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:51,723 INFO L225 Difference]: With dead ends: 90 [2019-10-22 09:00:51,723 INFO L226 Difference]: Without dead ends: 86 [2019-10-22 09:00:51,724 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2019-10-22 09:00:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-22 09:00:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-10-22 09:00:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-22 09:00:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-10-22 09:00:51,728 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2019-10-22 09:00:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:51,728 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-10-22 09:00:51,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-22 09:00:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-10-22 09:00:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-22 09:00:51,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:51,729 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:51,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:51,930 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:51,930 INFO L82 PathProgramCache]: Analyzing trace with hash 959677331, now seen corresponding path program 25 times [2019-10-22 09:00:51,930 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:51,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663077068] [2019-10-22 09:00:51,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:51,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:51,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-10-22 09:00:53,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663077068] [2019-10-22 09:00:53,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435503556] [2019-10-22 09:00:53,990 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:54,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-22 09:00:54,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-10-22 09:00:54,135 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:54,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2019-10-22 09:00:54,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070222851] [2019-10-22 09:00:54,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-10-22 09:00:54,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:54,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-10-22 09:00:54,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-10-22 09:00:54,137 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 55 states. [2019-10-22 09:00:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:54,989 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2019-10-22 09:00:54,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-22 09:00:54,989 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 159 [2019-10-22 09:00:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:54,990 INFO L225 Difference]: With dead ends: 93 [2019-10-22 09:00:54,990 INFO L226 Difference]: Without dead ends: 89 [2019-10-22 09:00:54,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-10-22 09:00:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-22 09:00:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-10-22 09:00:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-22 09:00:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2019-10-22 09:00:54,995 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 159 [2019-10-22 09:00:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:54,995 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2019-10-22 09:00:54,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-10-22 09:00:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2019-10-22 09:00:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-22 09:00:54,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:54,996 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:55,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:55,197 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:55,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1468417367, now seen corresponding path program 26 times [2019-10-22 09:00:55,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:55,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978743381] [2019-10-22 09:00:55,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:55,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:55,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-10-22 09:00:56,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978743381] [2019-10-22 09:00:56,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865965282] [2019-10-22 09:00:56,177 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:56,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:56,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:56,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-22 09:00:56,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-10-22 09:00:56,322 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:00:56,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2019-10-22 09:00:56,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912421637] [2019-10-22 09:00:56,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-22 09:00:56,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-22 09:00:56,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2019-10-22 09:00:56,324 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 31 states. [2019-10-22 09:00:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:56,781 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2019-10-22 09:00:56,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-22 09:00:56,782 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 165 [2019-10-22 09:00:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:56,782 INFO L225 Difference]: With dead ends: 89 [2019-10-22 09:00:56,783 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 09:00:56,783 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2019-10-22 09:00:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 09:00:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 09:00:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 09:00:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 09:00:56,784 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 165 [2019-10-22 09:00:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:56,784 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:00:56,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-22 09:00:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:00:56,784 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 09:00:56,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:56,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 09:00:57,011 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 09:00:57,011 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 09:00:57,011 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 09:00:57,011 INFO L443 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-10-22 09:00:57,011 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-10-22 09:00:57,011 INFO L439 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 25) (<= 25 ULTIMATE.start_main_~input~0)) [2019-10-22 09:00:57,011 INFO L443 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-10-22 09:00:57,011 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-10-22 09:00:57,011 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-10-22 09:00:57,012 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-10-22 09:00:57,012 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-10-22 09:00:57,012 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-10-22 09:00:57,012 INFO L439 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-10-22 09:00:57,012 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 09:00:57,012 INFO L443 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-10-22 09:00:57,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:00:57 BoogieIcfgContainer [2019-10-22 09:00:57,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:00:57,015 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:00:57,015 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:00:57,015 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:00:57,016 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:30" (3/4) ... [2019-10-22 09:00:57,019 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 09:00:57,025 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-10-22 09:00:57,031 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 09:00:57,031 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 09:00:57,070 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6a710eb2-a9d8-4ca2-82cc-14a2b9a9c2cc/bin/uautomizer/witness.graphml [2019-10-22 09:00:57,071 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:00:57,073 INFO L168 Benchmark]: Toolchain (without parser) took 26685.57 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 673.7 MB). Free memory was 941.8 MB in the beginning and 895.4 MB in the end (delta: 46.4 MB). Peak memory consumption was 720.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:57,073 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:00:57,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -199.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:57,074 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:57,074 INFO L168 Benchmark]: Boogie Preprocessor took 12.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:57,074 INFO L168 Benchmark]: RCFGBuilder took 168.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:57,075 INFO L168 Benchmark]: TraceAbstraction took 26132.35 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 532.7 MB). Free memory was 1.1 GB in the beginning and 917.2 MB in the end (delta: 204.2 MB). Peak memory consumption was 736.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:57,075 INFO L168 Benchmark]: Witness Printer took 55.70 ms. Allocated memory is still 1.7 GB. Free memory was 917.2 MB in the beginning and 895.4 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:57,077 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 278.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -199.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 168.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 26132.35 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 532.7 MB). Free memory was 1.1 GB in the beginning and 917.2 MB in the end (delta: 204.2 MB). Peak memory consumption was 736.9 MB. Max. memory is 11.5 GB. * Witness Printer took 55.70 ms. Allocated memory is still 1.7 GB. Free memory was 917.2 MB in the beginning and 895.4 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 26.0s, OverallIterations: 27, TraceHistogramMax: 27, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 346 SDtfs, 1217 SDslu, 3985 SDs, 0 SdLazy, 3250 SolverSat, 280 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3881 GetRequests, 3020 SyntacticMatches, 2 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=26, 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, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 4689 NumberOfCodeBlocks, 4689 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 4636 ConstructedInterpolants, 0 QuantifiedInterpolants, 1419088 SizeOfPredicates, 377 NumberOfNonLiveVariables, 5512 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 53 InterpolantComputations, 2 PerfectInterpolantSequences, 20956/37908 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...